Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

30 files changed, 10519 insertions, 0 deletions

diff --git a/src/seastar/dpdk/examples/performance-thread/Makefile b/src/seastar/dpdk/examples/performance-thread/Makefile
new file mode 100644
index 00000000..d19f8489
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/Makefile
@@ -0,0 +1,49 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2015 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+ifneq ($(CONFIG_RTE_ARCH),"x86_64")
+$(error This application is only supported for x86_64 targets)
+endif
+
+DIRS-y += l3fwd-thread
+DIRS-y += pthread_shim
+
+
+include $(RTE_SDK)/mk/rte.extsubdir.mk
diff --git a/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.c b/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.c
new file mode 100644
index 00000000..1e8e2717
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.c
@@ -0,0 +1,93 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * https://github.com/halayli/lthread which carries the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+
+#if defined(__x86_64__)
+__asm__ (
+".text\n"
+".p2align 4,,15\n"
+".globl ctx_switch\n"
+".globl _ctx_switch\n"
+"ctx_switch:\n"
+"_ctx_switch:\n"
+"	movq %rsp, 0(%rsi)	# save stack_pointer\n"
+"	movq %rbp, 8(%rsi)	# save frame_pointer\n"
+"	movq (%rsp), %rax	# save insn_pointer\n"
+"	movq %rax, 16(%rsi)\n"
+"	movq %rbx, 24(%rsi)\n	# save rbx,r12-r15\n"
+"	movq 24(%rdi), %rbx\n"
+"	movq %r15, 56(%rsi)\n"
+"	movq %r14, 48(%rsi)\n"
+"	movq 48(%rdi), %r14\n"
+"	movq 56(%rdi), %r15\n"
+"	movq %r13, 40(%rsi)\n"
+"	movq %r12, 32(%rsi)\n"
+"	movq 32(%rdi), %r12\n"
+"	movq 40(%rdi), %r13\n"
+"	movq 0(%rdi), %rsp	# restore stack_pointer\n"
+"	movq 16(%rdi), %rax	# restore insn_pointer\n"
+"	movq 8(%rdi), %rbp	# restore frame_pointer\n"
+"	movq %rax, (%rsp)\n"
+"	ret\n"
+	);
+#else
+#pragma GCC error "__x86_64__ is not defined"
+#endif
diff --git a/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.h b/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.h
new file mode 100644
index 00000000..a41ce05a
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/arch/x86/ctx.h
@@ -0,0 +1,65 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef CTX_H
+#define CTX_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * CPU context registers
+ */
+struct ctx {
+	void	*rsp;		/* 0  */
+	void	*rbp;		/* 8  */
+	void	*rip;		/* 16 */
+	void	*rbx;		/* 24 */
+	void	*r12;		/* 32 */
+	void	*r13;		/* 40 */
+	void	*r14;		/* 48 */
+	void	*r15;		/* 56 */
+};
+
+
+void
+ctx_switch(struct ctx *new_ctx, struct ctx *curr_ctx);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* RTE_CTX_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/common.mk b/src/seastar/dpdk/examples/performance-thread/common/common.mk
new file mode 100644
index 00000000..f6cab771
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/common.mk
@@ -0,0 +1,44 @@
+#
+#   BSD LICENSE
+#
+#  Copyright(c) 2015 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# list the C files belonging to the lthread subsystem, these are common to all
+# lthread apps. Any makefile including this should set VPATH to include this
+# directory path
+#
+
+MKFILE_PATH=$(abspath $(dir $(lastword $(MAKEFILE_LIST))))
+
+VPATH := $(MKFILE_PATH) $(MKFILE_PATH)/arch/x86
+
+SRCS-y += lthread.c lthread_sched.c lthread_cond.c lthread_tls.c lthread_mutex.c lthread_diag.c ctx.c
+
+INCLUDES += -I$(MKFILE_PATH) -I$(MKFILE_PATH)/arch/x86/
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread.c b/src/seastar/dpdk/examples/performance-thread/common/lthread.c
new file mode 100644
index 00000000..062275a4
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread.c
@@ -0,0 +1,529 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#define RTE_MEM 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+
+#include <rte_log.h>
+#include <ctx.h>
+
+#include "lthread_api.h"
+#include "lthread.h"
+#include "lthread_timer.h"
+#include "lthread_tls.h"
+#include "lthread_objcache.h"
+#include "lthread_diag.h"
+
+
+/*
+ * This function gets called after an lthread function has returned.
+ */
+void _lthread_exit_handler(struct lthread *lt)
+{
+
+	lt->state |= BIT(ST_LT_EXITED);
+
+	if (!(lt->state & BIT(ST_LT_DETACH))) {
+		/* thread is this not explicitly detached
+		 * it must be joinable, so we call lthread_exit().
+		 */
+		lthread_exit(NULL);
+	}
+
+	/* if we get here the thread is detached so we can reschedule it,
+	 * allowing the scheduler to free it
+	 */
+	_reschedule();
+}
+
+
+/*
+ * Free resources allocated to an lthread
+ */
+void _lthread_free(struct lthread *lt)
+{
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_FREE, lt, 0);
+
+	/* invoke any user TLS destructor functions */
+	_lthread_tls_destroy(lt);
+
+	/* free memory allocated for TLS defined using RTE_PER_LTHREAD macros */
+	if (sizeof(void *) < (uint64_t)RTE_PER_LTHREAD_SECTION_SIZE)
+		_lthread_objcache_free(lt->tls->root_sched->per_lthread_cache,
+					lt->per_lthread_data);
+
+	/* free pthread style TLS memory */
+	_lthread_objcache_free(lt->tls->root_sched->tls_cache, lt->tls);
+
+	/* free the stack */
+	_lthread_objcache_free(lt->stack_container->root_sched->stack_cache,
+				lt->stack_container);
+
+	/* now free the thread */
+	_lthread_objcache_free(lt->root_sched->lthread_cache, lt);
+
+}
+
+/*
+ * Allocate a stack and maintain a cache of stacks
+ */
+struct lthread_stack *_stack_alloc(void)
+{
+	struct lthread_stack *s;
+
+	s = _lthread_objcache_alloc((THIS_SCHED)->stack_cache);
+	RTE_ASSERT(s != NULL);
+
+	s->root_sched = THIS_SCHED;
+	s->stack_size = LTHREAD_MAX_STACK_SIZE;
+	return s;
+}
+
+/*
+ * Execute a ctx by invoking the start function
+ * On return call an exit handler if the user has provided one
+ */
+static void _lthread_exec(void *arg)
+{
+	struct lthread *lt = (struct lthread *)arg;
+
+	/* invoke the contexts function */
+	lt->fun(lt->arg);
+	/* do exit handling */
+	if (lt->exit_handler != NULL)
+		lt->exit_handler(lt);
+}
+
+/*
+ *	Initialize an lthread
+ *	Set its function, args, and exit handler
+ */
+void
+_lthread_init(struct lthread *lt,
+	lthread_func_t fun, void *arg, lthread_exit_func exit_handler)
+{
+
+	/* set ctx func and args */
+	lt->fun = fun;
+	lt->arg = arg;
+	lt->exit_handler = exit_handler;
+
+	/* set initial state */
+	lt->birth = _sched_now();
+	lt->state = BIT(ST_LT_INIT);
+	lt->join = LT_JOIN_INITIAL;
+}
+
+/*
+ *	set the lthread stack
+ */
+void _lthread_set_stack(struct lthread *lt, void *stack, size_t stack_size)
+{
+	char *stack_top = (char *)stack + stack_size;
+	void **s = (void **)stack_top;
+
+	/* set stack */
+	lt->stack = stack;
+	lt->stack_size = stack_size;
+
+	/* set initial context */
+	s[-3] = NULL;
+	s[-2] = (void *)lt;
+	lt->ctx.rsp = (void *)(stack_top - (4 * sizeof(void *)));
+	lt->ctx.rbp = (void *)(stack_top - (3 * sizeof(void *)));
+	lt->ctx.rip = (void *)_lthread_exec;
+}
+
+/*
+ * Create an lthread on the current scheduler
+ * If there is no current scheduler on this pthread then first create one
+ */
+int
+lthread_create(struct lthread **new_lt, int lcore_id,
+		lthread_func_t fun, void *arg)
+{
+	if ((new_lt == NULL) || (fun == NULL))
+		return POSIX_ERRNO(EINVAL);
+
+	if (lcore_id < 0)
+		lcore_id = rte_lcore_id();
+	else if (lcore_id > LTHREAD_MAX_LCORES)
+		return POSIX_ERRNO(EINVAL);
+
+	struct lthread *lt = NULL;
+
+	if (THIS_SCHED == NULL) {
+		THIS_SCHED = _lthread_sched_create(0);
+		if (THIS_SCHED == NULL) {
+			perror("Failed to create scheduler");
+			return POSIX_ERRNO(EAGAIN);
+		}
+	}
+
+	/* allocate a thread structure */
+	lt = _lthread_objcache_alloc((THIS_SCHED)->lthread_cache);
+	if (lt == NULL)
+		return POSIX_ERRNO(EAGAIN);
+
+	bzero(lt, sizeof(struct lthread));
+	lt->root_sched = THIS_SCHED;
+
+	/* set the function args and exit handlder */
+	_lthread_init(lt, fun, arg, _lthread_exit_handler);
+
+	/* put it in the ready queue */
+	*new_lt = lt;
+
+	if (lcore_id < 0)
+		lcore_id = rte_lcore_id();
+
+	DIAG_CREATE_EVENT(lt, LT_DIAG_LTHREAD_CREATE);
+
+	rte_wmb();
+	_ready_queue_insert(_lthread_sched_get(lcore_id), lt);
+	return 0;
+}
+
+/*
+ * Schedules lthread to sleep for `nsecs`
+ * setting the lthread state to LT_ST_SLEEPING.
+ * lthread state is cleared upon resumption or expiry.
+ */
+static inline void _lthread_sched_sleep(struct lthread *lt, uint64_t nsecs)
+{
+	uint64_t state = lt->state;
+	uint64_t clks = _ns_to_clks(nsecs);
+
+	if (clks) {
+		_timer_start(lt, clks);
+		lt->state = state | BIT(ST_LT_SLEEPING);
+	}
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_SLEEP, clks, 0);
+	_suspend();
+}
+
+
+
+/*
+ * Cancels any running timer.
+ * This can be called multiple times on the same lthread regardless if it was
+ * sleeping or not.
+ */
+int _lthread_desched_sleep(struct lthread *lt)
+{
+	uint64_t state = lt->state;
+
+	if (state & BIT(ST_LT_SLEEPING)) {
+		_timer_stop(lt);
+		state &= (CLEARBIT(ST_LT_SLEEPING) & CLEARBIT(ST_LT_EXPIRED));
+		lt->state = state | BIT(ST_LT_READY);
+		return 1;
+	}
+	return 0;
+}
+
+/*
+ * set user data pointer in an lthread
+ */
+void lthread_set_data(void *data)
+{
+	if (sizeof(void *) == RTE_PER_LTHREAD_SECTION_SIZE)
+		THIS_LTHREAD->per_lthread_data = data;
+}
+
+/*
+ * Retrieve user data pointer from an lthread
+ */
+void *lthread_get_data(void)
+{
+	return THIS_LTHREAD->per_lthread_data;
+}
+
+/*
+ * Return the current lthread handle
+ */
+struct lthread *lthread_current(void)
+{
+	struct lthread_sched *sched = THIS_SCHED;
+
+	if (sched)
+		return sched->current_lthread;
+	return NULL;
+}
+
+
+
+/*
+ * Tasklet to cancel a thread
+ */
+static void
+_cancel(void *arg)
+{
+	struct lthread *lt = (struct lthread *) arg;
+
+	lt->state |= BIT(ST_LT_CANCELLED);
+	lthread_detach();
+}
+
+
+/*
+ * Mark the specified as canceled
+ */
+int lthread_cancel(struct lthread *cancel_lt)
+{
+	struct lthread *lt;
+
+	if ((cancel_lt == NULL) || (cancel_lt == THIS_LTHREAD))
+		return POSIX_ERRNO(EINVAL);
+
+	DIAG_EVENT(cancel_lt, LT_DIAG_LTHREAD_CANCEL, cancel_lt, 0);
+
+	if (cancel_lt->sched != THIS_SCHED) {
+
+		/* spawn task-let to cancel the thread */
+		lthread_create(&lt,
+				cancel_lt->sched->lcore_id,
+				_cancel,
+				cancel_lt);
+		return 0;
+	}
+	cancel_lt->state |= BIT(ST_LT_CANCELLED);
+	return 0;
+}
+
+/*
+ * Suspend the current lthread for specified time
+ */
+void lthread_sleep(uint64_t nsecs)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	_lthread_sched_sleep(lt, nsecs);
+
+}
+
+/*
+ * Suspend the current lthread for specified time
+ */
+void lthread_sleep_clks(uint64_t clks)
+{
+	struct lthread *lt = THIS_LTHREAD;
+	uint64_t state = lt->state;
+
+	if (clks) {
+		_timer_start(lt, clks);
+		lt->state = state | BIT(ST_LT_SLEEPING);
+	}
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_SLEEP, clks, 0);
+	_suspend();
+}
+
+/*
+ * Requeue the current thread to the back of the ready queue
+ */
+void lthread_yield(void)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_YIELD, 0, 0);
+
+	_ready_queue_insert(THIS_SCHED, lt);
+	ctx_switch(&(THIS_SCHED)->ctx, &lt->ctx);
+}
+
+/*
+ * Exit the current lthread
+ * If a thread is joining pass the user pointer to it
+ */
+void lthread_exit(void *ptr)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	/* if thread is detached (this is not valid) just exit */
+	if (lt->state & BIT(ST_LT_DETACH))
+		return;
+
+	/* There is a race between lthread_join() and lthread_exit()
+	 *  - if exit before join then we suspend and resume on join
+	 *  - if join before exit then we resume the joining thread
+	 */
+	if ((lt->join == LT_JOIN_INITIAL)
+	    && rte_atomic64_cmpset(&lt->join, LT_JOIN_INITIAL,
+				   LT_JOIN_EXITING)) {
+
+		DIAG_EVENT(lt, LT_DIAG_LTHREAD_EXIT, 1, 0);
+		_suspend();
+		/* set the exit value */
+		if ((ptr != NULL) && (lt->lt_join->lt_exit_ptr != NULL))
+			*(lt->lt_join->lt_exit_ptr) = ptr;
+
+		/* let the joining thread know we have set the exit value */
+		lt->join = LT_JOIN_EXIT_VAL_SET;
+	} else {
+
+		DIAG_EVENT(lt, LT_DIAG_LTHREAD_EXIT, 0, 0);
+		/* set the exit value */
+		if ((ptr != NULL) && (lt->lt_join->lt_exit_ptr != NULL))
+			*(lt->lt_join->lt_exit_ptr) = ptr;
+		/* let the joining thread know we have set the exit value */
+		lt->join = LT_JOIN_EXIT_VAL_SET;
+		_ready_queue_insert(lt->lt_join->sched,
+				    (struct lthread *)lt->lt_join);
+	}
+
+
+	/* wait until the joinging thread has collected the exit value */
+	while (lt->join != LT_JOIN_EXIT_VAL_READ)
+		_reschedule();
+
+	/* reset join state */
+	lt->join = LT_JOIN_INITIAL;
+
+	/* detach it so its resources can be released */
+	lt->state |= (BIT(ST_LT_DETACH) | BIT(ST_LT_EXITED));
+}
+
+/*
+ * Join an lthread
+ * Suspend until the joined thread returns
+ */
+int lthread_join(struct lthread *lt, void **ptr)
+{
+	if (lt == NULL)
+		return POSIX_ERRNO(EINVAL);
+
+	struct lthread *current = THIS_LTHREAD;
+	uint64_t lt_state = lt->state;
+
+	/* invalid to join a detached thread, or a thread that is joined */
+	if ((lt_state & BIT(ST_LT_DETACH)) || (lt->join == LT_JOIN_THREAD_SET))
+		return POSIX_ERRNO(EINVAL);
+	/* pointer to the joining thread and a poingter to return a value */
+	lt->lt_join = current;
+	current->lt_exit_ptr = ptr;
+	/* There is a race between lthread_join() and lthread_exit()
+	 *  - if join before exit we suspend and will resume when exit is called
+	 *  - if exit before join we resume the exiting thread
+	 */
+	if ((lt->join == LT_JOIN_INITIAL)
+	    && rte_atomic64_cmpset(&lt->join, LT_JOIN_INITIAL,
+				   LT_JOIN_THREAD_SET)) {
+
+		DIAG_EVENT(current, LT_DIAG_LTHREAD_JOIN, lt, 1);
+		_suspend();
+	} else {
+		DIAG_EVENT(current, LT_DIAG_LTHREAD_JOIN, lt, 0);
+		_ready_queue_insert(lt->sched, lt);
+	}
+
+	/* wait for exiting thread to set return value */
+	while (lt->join != LT_JOIN_EXIT_VAL_SET)
+		_reschedule();
+
+	/* collect the return value */
+	if (ptr != NULL)
+		*ptr = *current->lt_exit_ptr;
+
+	/* let the exiting thread proceed to exit */
+	lt->join = LT_JOIN_EXIT_VAL_READ;
+	return 0;
+}
+
+
+/*
+ * Detach current lthread
+ * A detached thread cannot be joined
+ */
+void lthread_detach(void)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_DETACH, 0, 0);
+
+	uint64_t state = lt->state;
+
+	lt->state = state | BIT(ST_LT_DETACH);
+}
+
+/*
+ * Set function name of an lthread
+ * this is a debug aid
+ */
+void lthread_set_funcname(const char *f)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	strncpy(lt->funcname, f, sizeof(lt->funcname));
+	lt->funcname[sizeof(lt->funcname)-1] = 0;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread.h b/src/seastar/dpdk/examples/performance-thread/common/lthread.h
new file mode 100644
index 00000000..5c2c1a5f
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread.h
@@ -0,0 +1,107 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_H_
+#define LTHREAD_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_per_lcore.h>
+
+#include "lthread_api.h"
+#include "lthread_diag.h"
+
+struct lthread;
+struct lthread_sched;
+
+/* function to be called when a context function returns */
+typedef void (*lthread_exit_func) (struct lthread *);
+
+void _lthread_exit_handler(struct lthread *lt);
+
+void lthread_set_funcname(const char *f);
+
+void _lthread_sched_busy_sleep(struct lthread *lt, uint64_t nsecs);
+
+int _lthread_desched_sleep(struct lthread *lt);
+
+void _lthread_free(struct lthread *lt);
+
+struct lthread_sched *_lthread_sched_get(int lcore_id);
+
+struct lthread_stack *_stack_alloc(void);
+
+struct
+lthread_sched *_lthread_sched_create(size_t stack_size);
+
+void
+_lthread_init(struct lthread *lt,
+	      lthread_func_t fun, void *arg, lthread_exit_func exit_handler);
+
+void _lthread_set_stack(struct lthread *lt, void *stack, size_t stack_size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_api.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_api.h
new file mode 100644
index 00000000..ff245a08
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_api.h
@@ -0,0 +1,840 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software may have been derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/**
+ *  @file lthread_api.h
+ *
+ *  @warning
+ *  @b EXPERIMENTAL: this API may change without prior notice
+ *
+ *  This file contains the public API for the L-thread subsystem
+ *
+ *  The L_thread subsystem provides a simple cooperative scheduler to
+ *  enable arbitrary functions to run as cooperative threads within a
+ * single P-thread.
+ *
+ * The subsystem provides a P-thread like API that is intended to assist in
+ * reuse of legacy code written for POSIX p_threads.
+ *
+ * The L-thread subsystem relies on cooperative multitasking, as such
+ * an L-thread must possess frequent rescheduling points. Often these
+ * rescheduling points are provided transparently when the application
+ * invokes an L-thread API.
+ *
+ * In some applications it is possible that the program may enter a loop the
+ * exit condition for which depends on the action of another thread or a
+ * response from hardware. In such a case it is necessary to yield the thread
+ * periodically in the loop body, to allow other threads an opportunity to
+ * run. This can be done by inserting a call to lthread_yield() or
+ * lthread_sleep(n) in the body of the loop.
+ *
+ * If the application makes expensive / blocking system calls or does other
+ * work that would take an inordinate amount of time to complete, this will
+ * stall the cooperative scheduler resulting in very poor performance.
+ *
+ * In such cases an L-thread can be migrated temporarily to another scheduler
+ * running in a different P-thread on another core. When the expensive or
+ * blocking operation is completed it can be migrated back to the original
+ * scheduler.  In this way other threads can continue to run on the original
+ * scheduler and will be completely unaffected by the blocking behaviour.
+ * To migrate an L-thread to another scheduler the API lthread_set_affinity()
+ * is provided.
+ *
+ * If L-threads that share data are running on the same core it is possible
+ * to design programs where mutual exclusion mechanisms to protect shared data
+ * can be avoided. This is due to the fact that the cooperative threads cannot
+ * preempt each other.
+ *
+ * There are two cases where mutual exclusion mechanisms are necessary.
+ *
+ *  a) Where the L-threads sharing data are running on different cores.
+ *  b) Where code must yield while updating data shared with another thread.
+ *
+ * The L-thread subsystem provides a set of mutex APIs to help with such
+ * scenarios, however excessive reliance on on these will impact performance
+ * and is best avoided if possible.
+ *
+ * L-threads can synchronise using a fast condition variable implementation
+ * that supports signal and broadcast. An L-thread running on any core can
+ * wait on a condition.
+ *
+ * L-threads can have L-thread local storage with an API modelled on either the
+ * P-thread get/set specific API or using PER_LTHREAD macros modelled on the
+ * RTE_PER_LCORE macros. Alternatively a simple user data pointer may be set
+ * and retrieved from a thread.
+ */
+#ifndef LTHREAD_H
+#define LTHREAD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <netinet/in.h>
+
+#include <rte_cycles.h>
+
+
+struct lthread;
+struct lthread_cond;
+struct lthread_mutex;
+
+struct lthread_condattr;
+struct lthread_mutexattr;
+
+typedef void (*lthread_func_t) (void *);
+
+/*
+ * Define the size of stack for an lthread
+ * Then this is the size that will be allocated on lthread creation
+ * This is a fixed size and will not grow.
+ */
+#define LTHREAD_MAX_STACK_SIZE (1024*64)
+
+/**
+ * Define the maximum number of TLS keys that can be created
+ *
+ */
+#define LTHREAD_MAX_KEYS 1024
+
+/**
+ * Define the maximum number of attempts to destroy an lthread's
+ * TLS data on thread exit
+ */
+#define LTHREAD_DESTRUCTOR_ITERATIONS 4
+
+
+/**
+ * Define the maximum number of lcores that will support lthreads
+ */
+#define LTHREAD_MAX_LCORES RTE_MAX_LCORE
+
+/**
+ * How many lthread objects to pre-allocate as the system grows
+ * applies to lthreads + stacks, TLS, mutexs, cond vars.
+ *
+ * @see _lthread_alloc()
+ * @see _cond_alloc()
+ * @see _mutex_alloc()
+ *
+ */
+#define LTHREAD_PREALLOC 100
+
+/**
+ * Set the number of schedulers in the system.
+ *
+ * This function may optionally be called before starting schedulers.
+ *
+ * If the number of schedulers is not set, or set to 0 then each scheduler
+ * will begin scheduling lthreads immediately it is started.
+
+ * If the number of schedulers is set to greater than 0, then each scheduler
+ * will wait until all schedulers have started before beginning to schedule
+ * lthreads.
+ *
+ * If an application wishes to have threads migrate between cores using
+ * lthread_set_affinity(), or join threads running on other cores using
+ * lthread_join(), then it is prudent to set the number of schedulers to ensure
+ * that all schedulers are initialised beforehand.
+ *
+ * @param num
+ *  the number of schedulers in the system
+ * @return
+ * the number of schedulers in the system
+ */
+int lthread_num_schedulers_set(int num);
+
+/**
+ * Return the number of schedulers currently running
+ * @return
+ *  the number of schedulers in the system
+ */
+int lthread_active_schedulers(void);
+
+/**
+  * Shutdown the specified scheduler
+  *
+  *  This function tells the specified scheduler to
+  *  exit if/when there is no more work to do.
+  *
+  *  Note that although the scheduler will stop
+  *  resources are not freed.
+  *
+  * @param lcore
+  *	The lcore of the scheduler to shutdown
+  *
+  * @return
+  *  none
+  */
+void lthread_scheduler_shutdown(unsigned lcore);
+
+/**
+  * Shutdown all schedulers
+  *
+  *  This function tells all schedulers  including the current scheduler to
+  *  exit if/when there is no more work to do.
+  *
+  *  Note that although the schedulers will stop
+  *  resources are not freed.
+  *
+  * @return
+  *  none
+  */
+void lthread_scheduler_shutdown_all(void);
+
+/**
+  * Run the lthread scheduler
+  *
+  *  Runs the lthread scheduler.
+  *  This function returns only if/when all lthreads have exited.
+  *  This function must be the main loop of an EAL thread.
+  *
+  * @return
+  *	 none
+  */
+
+void lthread_run(void);
+
+/**
+  * Create an lthread
+  *
+  *  Creates an lthread and places it in the ready queue on a particular
+  *  lcore.
+  *
+  *  If no scheduler exists yet on the curret lcore then one is created.
+  *
+  * @param new_lt
+  *  Pointer to an lthread pointer that will be initialized
+  * @param lcore
+  *  the lcore the thread should be started on or the current clore
+  *    -1 the current lcore
+  *    0 - LTHREAD_MAX_LCORES any other lcore
+  * @param lthread_func
+  *  Pointer to the function the for the thread to run
+  * @param arg
+  *  Pointer to args that will be passed to the thread
+  *
+  * @return
+  *	 0    success
+  *	 EAGAIN  no resources available
+  *	 EINVAL  NULL thread or function pointer, or lcore_id out of range
+  */
+int
+lthread_create(struct lthread **new_lt,
+		int lcore, lthread_func_t func, void *arg);
+
+/**
+  * Cancel an lthread
+  *
+  *  Cancels an lthread and causes it to be terminated
+  *  If the lthread is detached it will be freed immediately
+  *  otherwise its resources will not be released until it is joined.
+  *
+  * @param new_lt
+  *  Pointer to an lthread that will be cancelled
+  *
+  * @return
+  *	 0    success
+  *	 EINVAL  thread was NULL
+  */
+int lthread_cancel(struct lthread *lt);
+
+/**
+  * Join an lthread
+  *
+  *  Joins the current thread with the specified lthread, and waits for that
+  *  thread to exit.
+  *  Passes an optional pointer to collect returned data.
+  *
+  * @param lt
+  *  Pointer to the lthread to be joined
+  * @param ptr
+  *  Pointer to pointer to collect returned data
+  *
+0  * @return
+  *  0    success
+  *  EINVAL lthread could not be joined.
+  */
+int lthread_join(struct lthread *lt, void **ptr);
+
+/**
+  * Detach an lthread
+  *
+  * Detaches the current thread
+  * On exit a detached lthread will be freed immediately and will not wait
+  * to be joined. The default state for a thread is not detached.
+  *
+  * @return
+  *  none
+  */
+void lthread_detach(void);
+
+/**
+  *  Exit an lthread
+  *
+  * Terminate the current thread, optionally return data.
+  * The data may be collected by lthread_join()
+  *
+  * After calling this function the lthread will be suspended until it is
+  * joined. After it is joined then its resources will be freed.
+  *
+  * @param ptr
+  *  Pointer to pointer to data to be returned
+  *
+  * @return
+  *  none
+  */
+void lthread_exit(void *val);
+
+/**
+  * Cause the current lthread to sleep for n nanoseconds
+  *
+  * The current thread will be suspended until the specified time has elapsed
+  * or has been exceeded.
+  *
+  * Execution will switch to the next lthread that is ready to run
+  *
+  * @param nsecs
+  *  Number of nanoseconds to sleep
+  *
+  * @return
+  *  none
+  */
+void lthread_sleep(uint64_t nsecs);
+
+/**
+  * Cause the current lthread to sleep for n cpu clock ticks
+  *
+  *  The current thread will be suspended until the specified time has elapsed
+  *  or has been exceeded.
+  *
+  *	 Execution will switch to the next lthread that is ready to run
+  *
+  * @param clks
+  *  Number of clock ticks to sleep
+  *
+  * @return
+  *  none
+  */
+void lthread_sleep_clks(uint64_t clks);
+
+/**
+  * Yield the current lthread
+  *
+  *  The current thread will yield and execution will switch to the
+  *  next lthread that is ready to run
+  *
+  * @return
+  *  none
+  */
+void lthread_yield(void);
+
+/**
+  * Migrate the current thread to another scheduler
+  *
+  *  This function migrates the current thread to another scheduler.
+  *  Execution will switch to the next lthread that is ready to run on the
+  *  current scheduler. The current thread will be resumed on the new scheduler.
+  *
+  * @param lcore
+  *	The lcore to migrate to
+  *
+  * @return
+  *  0   success we are now running on the specified core
+  *  EINVAL the destination lcore was not valid
+  */
+int lthread_set_affinity(unsigned lcore);
+
+/**
+  * Return the current lthread
+  *
+  *  Returns the current lthread
+  *
+  * @return
+  *  pointer to the current lthread
+  */
+struct lthread
+*lthread_current(void);
+
+/**
+  * Associate user data with an lthread
+  *
+  *  This function sets a user data pointer in the current lthread
+  *  The pointer can be retrieved with lthread_get_data()
+  *  It is the users responsibility to allocate and free any data referenced
+  *  by the user pointer.
+  *
+  * @param data
+  *  pointer to user data
+  *
+  * @return
+  *  none
+  */
+void lthread_set_data(void *data);
+
+/**
+  * Get user data for the current lthread
+  *
+  *  This function returns a user data pointer for the current lthread
+  *  The pointer must first be set with lthread_set_data()
+  *  It is the users responsibility to allocate and free any data referenced
+  *  by the user pointer.
+  *
+  * @return
+  *  pointer to user data
+  */
+void
+*lthread_get_data(void);
+
+struct lthread_key;
+typedef void (*tls_destructor_func) (void *);
+
+/**
+  * Create a key for lthread TLS
+  *
+  *  This function is modelled on pthread_key_create
+  *  It creates a thread-specific data key visible to all lthreads on the
+  *  current scheduler.
+  *
+  *  Key values may be used to locate thread-specific data.
+  *  The same key value	may be used by different threads, the values bound
+  *  to the key by	lthread_setspecific() are maintained on	a per-thread
+  *  basis and persist for the life of the calling thread.
+  *
+  *  An	optional destructor function may be associated with each key value.
+  *  At	thread exit, if	a key value has	a non-NULL destructor pointer, and the
+  *  thread has	a non-NULL value associated with the key, the function pointed
+  *  to	is called with the current associated value as its sole	argument.
+  *
+  * @param key
+  *   Pointer to the key to be created
+  * @param destructor
+  *   Pointer to destructor function
+  *
+  * @return
+  *  0 success
+  *  EINVAL the key ptr was NULL
+  *  EAGAIN no resources available
+  */
+int lthread_key_create(unsigned int *key, tls_destructor_func destructor);
+
+/**
+  * Delete key for lthread TLS
+  *
+  *  This function is modelled on pthread_key_delete().
+  *  It deletes a thread-specific data key previously returned by
+  *  lthread_key_create().
+  *  The thread-specific data values associated with the key need not be NULL
+  *  at the time that lthread_key_delete is called.
+  *  It is the responsibility of the application to free any application
+  *  storage or perform any cleanup actions for data structures related to the
+  *  deleted key. This cleanup can be done either before or after
+  * lthread_key_delete is called.
+  *
+  * @param key
+  *  The key to be deleted
+  *
+  * @return
+  *  0 Success
+  *  EINVAL the key was invalid
+  */
+int lthread_key_delete(unsigned int key);
+
+/**
+  * Get lthread TLS
+  *
+  *  This function is modelled on pthread_get_specific().
+  *  It returns the value currently bound to the specified key on behalf of the
+  *  calling thread. Calling lthread_getspecific() with a key value not
+  *  obtained from lthread_key_create() or after key has been deleted with
+  *  lthread_key_delete() will result in undefined behaviour.
+  *  lthread_getspecific() may be called from a thread-specific data destructor
+  *  function.
+  *
+  * @param key
+  *  The key for which data is requested
+  *
+  * @return
+  *  Pointer to the thread specific data associated with that key
+  *  or NULL if no data has been set.
+  */
+void
+*lthread_getspecific(unsigned int key);
+
+/**
+  * Set lthread TLS
+  *
+  *  This function is modelled on pthread_set_sepcific()
+  *  It associates a thread-specific value with a key obtained via a previous
+  *  call to lthread_key_create().
+  *  Different threads may bind different values to the same key. These values
+  *  are typically pointers to dynamically allocated memory that have been
+  *  reserved by the calling thread. Calling lthread_setspecific with a key
+  *  value not obtained from lthread_key_create or after the key has been
+  *  deleted with lthread_key_delete will result in undefined behaviour.
+  *
+  * @param key
+  *  The key for which data is to be set
+  * @param key
+  *  Pointer to the user data
+  *
+  * @return
+  *  0 success
+  *  EINVAL the key was invalid
+  */
+
+int lthread_setspecific(unsigned int key, const void *value);
+
+/**
+ * The macros below provide an alternative mechanism to access lthread local
+ *  storage.
+ *
+ * The macros can be used to declare define and access per lthread local
+ * storage in a similar way to the RTE_PER_LCORE macros which control storage
+ * local to an lcore.
+ *
+ * Memory for per lthread variables declared in this way is allocated when the
+ * lthread is created and a pointer to this memory is stored in the lthread.
+ * The per lthread variables are accessed via the pointer + the offset of the
+ * particular variable.
+ *
+ * The total size of per lthread storage, and the variable offsets are found by
+ * defining the variables in a unique global memory section, the start and end
+ * of which is known. This global memory section is used only in the
+ * computation of the addresses of the lthread variables, and is never actually
+ * used to store any data.
+ *
+ * Due to the fact that variables declared this way may be scattered across
+ * many files, the start and end of the section and variable offsets are only
+ * known after linking, thus the computation of section size and variable
+ * addresses is performed at run time.
+ *
+ * These macros are primarily provided to aid porting of code that makes use
+ * of the existing RTE_PER_LCORE macros. In principle it would be more efficient
+ * to gather all lthread local variables into a single structure and
+ * set/retrieve a pointer to that struct using the alternative
+ * lthread_data_set/get APIs.
+ *
+ * These macros are mutually exclusive with the lthread_data_set/get APIs.
+ * If you define storage using these macros then the lthread_data_set/get APIs
+ * will not perform as expected, the lthread_data_set API does nothing, and the
+ * lthread_data_get API returns the start of global section.
+ *
+ */
+/* start and end of per lthread section */
+extern char __start_per_lt;
+extern char __stop_per_lt;
+
+
+#define RTE_DEFINE_PER_LTHREAD(type, name)                      \
+__typeof__(type)__attribute((section("per_lt"))) per_lt_##name
+
+/**
+ * Macro to declare an extern per lthread variable "var" of type "type"
+ */
+#define RTE_DECLARE_PER_LTHREAD(type, name)                     \
+extern __typeof__(type)__attribute((section("per_lt"))) per_lt_##name
+
+/**
+ * Read/write the per-lcore variable value
+ */
+#define RTE_PER_LTHREAD(name) ((typeof(per_lt_##name) *)\
+((char *)lthread_get_data() +\
+((char *) &per_lt_##name - &__start_per_lt)))
+
+/**
+  * Initialize a mutex
+  *
+  *  This function provides a mutual exclusion device, the need for which
+  *  can normally be avoided in a cooperative multitasking environment.
+  *  It is provided to aid porting of legacy code originally written for
+  *   preemptive multitasking environments such as pthreads.
+  *
+  *  A mutex may be unlocked (not owned by any thread), or locked (owned by
+  *  one thread).
+  *
+  *  A mutex can never be owned  by more than one thread simultaneously.
+  *  A thread attempting to lock a mutex that is already locked by another
+  *  thread is suspended until the owning thread unlocks the mutex.
+  *
+  *  lthread_mutex_init() initializes the mutex object pointed to by mutex
+  *  Optional mutex attributes specified in mutexattr, are reserved for future
+  *  use and are currently ignored.
+  *
+  *  If a thread calls lthread_mutex_lock() on the mutex, then if the mutex
+  *  is currently unlocked,  it  becomes  locked  and  owned  by  the calling
+  *  thread, and lthread_mutex_lock returns immediately. If the mutex is
+  *  already locked by another thread, lthread_mutex_lock suspends the calling
+  *  thread until the mutex is unlocked.
+  *
+  *  lthread_mutex_trylock behaves identically to rte_thread_mutex_lock, except
+  *  that it does not block the calling  thread  if the mutex is already locked
+  *  by another thread.
+  *
+  *  lthread_mutex_unlock() unlocks the specified mutex. The mutex is assumed
+  *  to be locked and owned by the calling thread.
+  *
+  *  lthread_mutex_destroy() destroys a	mutex object, freeing its resources.
+  *  The mutex must be unlocked with nothing blocked on it before calling
+  *  lthread_mutex_destroy.
+  *
+  * @param name
+  *  Optional pointer to string describing the mutex
+  * @param mutex
+  *  Pointer to pointer to the mutex to be initialized
+  * @param attribute
+  *  Pointer to attribute - unused reserved
+  *
+  * @return
+  *  0 success
+  *  EINVAL mutex was not a valid pointer
+  *  EAGAIN insufficient resources
+  */
+
+int
+lthread_mutex_init(char *name, struct lthread_mutex **mutex,
+		   const struct lthread_mutexattr *attr);
+
+/**
+  * Destroy a mutex
+  *
+  *  This function destroys the specified mutex freeing its resources.
+  *  The mutex must be unlocked before calling lthread_mutex_destroy.
+  *
+  * @see lthread_mutex_init()
+  *
+  * @param mutex
+  *  Pointer to pointer to the mutex to be initialized
+  *
+  * @return
+  *  0 success
+  *  EINVAL mutex was not an initialized mutex
+  *  EBUSY mutex was still in use
+  */
+int lthread_mutex_destroy(struct lthread_mutex *mutex);
+
+/**
+  * Lock a mutex
+  *
+  *  This function attempts to lock a mutex.
+  *  If a thread calls lthread_mutex_lock() on the mutex, then if the mutex
+  *  is currently unlocked,  it  becomes  locked  and  owned  by  the calling
+  *  thread, and lthread_mutex_lock returns immediately. If the mutex is
+  *  already locked by another thread, lthread_mutex_lock suspends the calling
+  *  thread until the mutex is unlocked.
+  *
+  * @see lthread_mutex_init()
+  *
+  * @param mutex
+  *  Pointer to pointer to the mutex to be initialized
+  *
+  * @return
+  *  0 success
+  *  EINVAL mutex was not an initialized mutex
+  *  EDEADLOCK the mutex was already owned by the calling thread
+  */
+
+int lthread_mutex_lock(struct lthread_mutex *mutex);
+
+/**
+  * Try to lock a mutex
+  *
+  *  This function attempts to lock a mutex.
+  *  lthread_mutex_trylock behaves identically to rte_thread_mutex_lock, except
+  *  that it does not block the calling  thread  if the mutex is already locked
+  *  by another thread.
+  *
+  *
+  * @see lthread_mutex_init()
+  *
+  * @param mutex
+  *  Pointer to pointer to the mutex to be initialized
+  *
+  * @return
+  * 0 success
+  * EINVAL mutex was not an initialized mutex
+  * EBUSY the mutex was already locked by another thread
+  */
+int lthread_mutex_trylock(struct lthread_mutex *mutex);
+
+/**
+  * Unlock a mutex
+  *
+  * This function attempts to unlock the specified mutex. The mutex is assumed
+  * to be locked and owned by the calling thread.
+  *
+  * The oldest of any threads blocked on the mutex is made ready and may
+  * compete with any other running thread to gain the mutex, it fails it will
+  *  be blocked again.
+  *
+  * @param mutex
+  * Pointer to pointer to the mutex to be initialized
+  *
+  * @return
+  *  0 mutex was unlocked
+  *  EINVAL mutex was not an initialized mutex
+  *  EPERM the mutex was not owned by the calling thread
+  */
+
+int lthread_mutex_unlock(struct lthread_mutex *mutex);
+
+/**
+  * Initialize a condition variable
+  *
+  *  This function initializes a condition variable.
+  *
+  *  Condition variables can be used to communicate changes in the state of data
+  *  shared between threads.
+  *
+  * @see lthread_cond_wait()
+  *
+  * @param name
+  *  Pointer to optional string describing the condition variable
+  * @param c
+  *  Pointer to pointer to the condition variable to be initialized
+  * @param attr
+  *  Pointer to optional attribute reserved for future use, currently ignored
+  *
+  * @return
+  *  0 success
+  *  EINVAL cond was not a valid pointer
+  *  EAGAIN insufficient resources
+  */
+int
+lthread_cond_init(char *name, struct lthread_cond **c,
+		  const struct lthread_condattr *attr);
+
+/**
+  * Destroy a condition variable
+  *
+  *  This function destroys a condition variable that was created with
+  *  lthread_cond_init() and releases its resources.
+  *
+  * @param cond
+  *  Pointer to pointer to the condition variable to be destroyed
+  *
+  * @return
+  *  0 Success
+  *  EBUSY condition variable was still in use
+  *  EINVAL was not an initialised condition variable
+  */
+int lthread_cond_destroy(struct lthread_cond *cond);
+
+/**
+  * Wait on a condition variable
+  *
+  *  The function blocks the current thread waiting on the condition variable
+  *  specified by cond. The waiting thread unblocks only after another thread
+  *  calls lthread_cond_signal, or lthread_cond_broadcast, specifying the
+  *  same condition variable.
+  *
+  * @param cond
+  *  Pointer to pointer to the condition variable to be waited on
+  *
+  * @param reserved
+  *  reserved for future use
+  *
+  * @return
+  *  0 The condition was signalled ( Success )
+  *  EINVAL was not a an initialised condition variable
+  */
+int lthread_cond_wait(struct lthread_cond *c, uint64_t reserved);
+
+/**
+  * Signal a condition variable
+  *
+  *  The function unblocks one thread waiting for the condition variable cond.
+  *  If no threads are waiting on cond, the rte_lthead_cond_signal() function
+  *  has no effect.
+  *
+  * @param cond
+  *  Pointer to pointer to the condition variable to be signalled
+  *
+  * @return
+  *  0 The condition was signalled ( Success )
+  *  EINVAL was not a an initialised condition variable
+  */
+int lthread_cond_signal(struct lthread_cond *c);
+
+/**
+  * Broadcast a condition variable
+  *
+  *  The function unblocks all threads waiting for the condition variable cond.
+  *  If no threads are waiting on cond, the rte_lthead_cond_broadcast()
+  *  function has no effect.
+  *
+  * @param cond
+  *  Pointer to pointer to the condition variable to be signalled
+  *
+  * @return
+  *  0 The condition was signalled ( Success )
+  *  EINVAL was not a an initialised condition variable
+  */
+int lthread_cond_broadcast(struct lthread_cond *c);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_H */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.c b/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.c
new file mode 100644
index 00000000..96fcce04
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.c
@@ -0,0 +1,239 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software may have been derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+#include <rte_log.h>
+#include <rte_common.h>
+
+#include "lthread_api.h"
+#include "lthread_diag_api.h"
+#include "lthread_diag.h"
+#include "lthread_int.h"
+#include "lthread_sched.h"
+#include "lthread_queue.h"
+#include "lthread_objcache.h"
+#include "lthread_timer.h"
+#include "lthread_mutex.h"
+#include "lthread_cond.h"
+
+/*
+ * Create a condition variable
+ */
+int
+lthread_cond_init(char *name, struct lthread_cond **cond,
+		  __rte_unused const struct lthread_condattr *attr)
+{
+	struct lthread_cond *c;
+
+	if (cond == NULL)
+		return POSIX_ERRNO(EINVAL);
+
+	/* allocate a condition variable from cache */
+	c = _lthread_objcache_alloc((THIS_SCHED)->cond_cache);
+
+	if (c == NULL)
+		return POSIX_ERRNO(EAGAIN);
+
+	c->blocked = _lthread_queue_create("blocked");
+	if (c->blocked == NULL) {
+		_lthread_objcache_free((THIS_SCHED)->cond_cache, (void *)c);
+		return POSIX_ERRNO(EAGAIN);
+	}
+
+	if (name == NULL)
+		strncpy(c->name, "no name", sizeof(c->name));
+	else
+		strncpy(c->name, name, sizeof(c->name));
+	c->name[sizeof(c->name)-1] = 0;
+
+	c->root_sched = THIS_SCHED;
+
+	(*cond) = c;
+	DIAG_CREATE_EVENT((*cond), LT_DIAG_COND_CREATE);
+	return 0;
+}
+
+/*
+ * Destroy a condition variable
+ */
+int lthread_cond_destroy(struct lthread_cond *c)
+{
+	if (c == NULL) {
+		DIAG_EVENT(c, LT_DIAG_COND_DESTROY, c, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	/* try to free it */
+	if (_lthread_queue_destroy(c->blocked) < 0) {
+		/* queue in use */
+		DIAG_EVENT(c, LT_DIAG_COND_DESTROY, c, POSIX_ERRNO(EBUSY));
+		return POSIX_ERRNO(EBUSY);
+	}
+
+	/* okay free it */
+	_lthread_objcache_free(c->root_sched->cond_cache, c);
+	DIAG_EVENT(c, LT_DIAG_COND_DESTROY, c, 0);
+	return 0;
+}
+
+/*
+ * Wait on a condition variable
+ */
+int lthread_cond_wait(struct lthread_cond *c, __rte_unused uint64_t reserved)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	if (c == NULL) {
+		DIAG_EVENT(c, LT_DIAG_COND_WAIT, c, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+
+	DIAG_EVENT(c, LT_DIAG_COND_WAIT, c, 0);
+
+	/* queue the current thread in the blocked queue
+	 * this will be written when we return to the scheduler
+	 * to ensure that the current thread context is saved
+	 * before any signal could result in it being dequeued and
+	 * resumed
+	 */
+	lt->pending_wr_queue = c->blocked;
+	_suspend();
+
+	/* the condition happened */
+	return 0;
+}
+
+/*
+ * Signal a condition variable
+ * attempt to resume any blocked thread
+ */
+int lthread_cond_signal(struct lthread_cond *c)
+{
+	struct lthread *lt;
+
+	if (c == NULL) {
+		DIAG_EVENT(c, LT_DIAG_COND_SIGNAL, c, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	lt = _lthread_queue_remove(c->blocked);
+
+	if (lt != NULL) {
+		/* okay wake up this thread */
+		DIAG_EVENT(c, LT_DIAG_COND_SIGNAL, c, lt);
+		_ready_queue_insert((struct lthread_sched *)lt->sched, lt);
+	}
+	return 0;
+}
+
+/*
+ * Broadcast a condition variable
+ */
+int lthread_cond_broadcast(struct lthread_cond *c)
+{
+	struct lthread *lt;
+
+	if (c == NULL) {
+		DIAG_EVENT(c, LT_DIAG_COND_BROADCAST, c, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	DIAG_EVENT(c, LT_DIAG_COND_BROADCAST, c, 0);
+	do {
+		/* drain the queue waking everybody */
+		lt = _lthread_queue_remove(c->blocked);
+
+		if (lt != NULL) {
+			DIAG_EVENT(c, LT_DIAG_COND_BROADCAST, c, lt);
+			/* wake up */
+			_ready_queue_insert((struct lthread_sched *)lt->sched,
+					    lt);
+		}
+	} while (!_lthread_queue_empty(c->blocked));
+	_reschedule();
+	DIAG_EVENT(c, LT_DIAG_COND_BROADCAST, c, 0);
+	return 0;
+}
+
+/*
+ * return the diagnostic ref val stored in a condition var
+ */
+uint64_t
+lthread_cond_diag_ref(struct lthread_cond *c)
+{
+	if (c == NULL)
+		return 0;
+	return c->diag_ref;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.h
new file mode 100644
index 00000000..5e5f14be
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_cond.h
@@ -0,0 +1,85 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software may have been derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_COND_H_
+#define LTHREAD_COND_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_queue.h"
+
+#define MAX_COND_NAME_SIZE 64
+
+struct lthread_cond {
+	struct lthread_queue *blocked;
+	struct lthread_sched *root_sched;
+	int count;
+	char name[MAX_COND_NAME_SIZE];
+	uint64_t diag_ref;	/* optional ref to user diag data */
+} __rte_cache_aligned;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_COND_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.c b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.c
new file mode 100644
index 00000000..bce1a0c3
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.c
@@ -0,0 +1,323 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rte_log.h>
+#include <rte_common.h>
+
+#include "lthread_diag.h"
+#include "lthread_queue.h"
+#include "lthread_pool.h"
+#include "lthread_objcache.h"
+#include "lthread_sched.h"
+#include "lthread_diag_api.h"
+
+
+/* dummy ref value of default diagnostic callback */
+static uint64_t dummy_ref;
+
+#define DIAG_SCHED_STATS_FORMAT \
+"core %d\n%33s %12s %12s %12s %12s\n"
+
+#define DIAG_CACHE_STATS_FORMAT \
+"%20s %12lu %12lu %12lu %12lu %12lu\n"
+
+#define DIAG_QUEUE_STATS_FORMAT \
+"%20s %12lu %12lu %12lu\n"
+
+
+/*
+ * texts used in diagnostic events,
+ * corresponding diagnostic mask bit positions are given as comment
+ */
+const char *diag_event_text[] = {
+	"LTHREAD_CREATE     ",	/* 00 */
+	"LTHREAD_EXIT       ",	/* 01 */
+	"LTHREAD_JOIN       ",	/* 02 */
+	"LTHREAD_CANCEL     ",	/* 03 */
+	"LTHREAD_DETACH     ",	/* 04 */
+	"LTHREAD_FREE       ",	/* 05 */
+	"LTHREAD_SUSPENDED  ",	/* 06 */
+	"LTHREAD_YIELD      ",	/* 07 */
+	"LTHREAD_RESCHEDULED",	/* 08 */
+	"LTHREAD_SLEEP      ",	/* 09 */
+	"LTHREAD_RESUMED    ",	/* 10 */
+	"LTHREAD_AFFINITY   ",	/* 11 */
+	"LTHREAD_TMR_START  ",	/* 12 */
+	"LTHREAD_TMR_DELETE ",	/* 13 */
+	"LTHREAD_TMR_EXPIRED",	/* 14 */
+	"COND_CREATE        ",	/* 15 */
+	"COND_DESTROY       ",	/* 16 */
+	"COND_WAIT          ",	/* 17 */
+	"COND_SIGNAL        ",	/* 18 */
+	"COND_BROADCAST     ",	/* 19 */
+	"MUTEX_CREATE       ",	/* 20 */
+	"MUTEX_DESTROY      ",	/* 21 */
+	"MUTEX_LOCK         ",	/* 22 */
+	"MUTEX_TRYLOCK      ",	/* 23 */
+	"MUTEX_BLOCKED      ",	/* 24 */
+	"MUTEX_UNLOCKED     ",	/* 25 */
+	"SCHED_CREATE       ",	/* 26 */
+	"SCHED_SHUTDOWN     "	/* 27 */
+};
+
+
+/*
+ * set diagnostic ,ask
+ */
+void lthread_diagnostic_set_mask(DIAG_USED uint64_t mask)
+{
+#if LTHREAD_DIAG
+	diag_mask = mask;
+#else
+	RTE_LOG(INFO, LTHREAD,
+		"LTHREAD_DIAG is not set, see lthread_diag_api.h\n");
+#endif
+}
+
+
+/*
+ * Check consistency of the scheduler stats
+ * Only sensible run after the schedulers are stopped
+ * Count the number of objects lying in caches and queues
+ * and available in the qnode pool.
+ * This should be equal to the total capacity of all
+ * qnode pools.
+ */
+void
+_sched_stats_consistency_check(void);
+void
+_sched_stats_consistency_check(void)
+{
+#if LTHREAD_DIAG
+	int i;
+	struct lthread_sched *sched;
+	uint64_t count = 0;
+	uint64_t capacity = 0;
+
+	for (i = 0; i < LTHREAD_MAX_LCORES; i++) {
+		sched = schedcore[i];
+		if (sched == NULL)
+			continue;
+
+		/* each of these queues consumes a stub node */
+		count += 8;
+		count += DIAG_COUNT(sched->ready, size);
+		count += DIAG_COUNT(sched->pready, size);
+		count += DIAG_COUNT(sched->lthread_cache, available);
+		count += DIAG_COUNT(sched->stack_cache, available);
+		count += DIAG_COUNT(sched->tls_cache, available);
+		count += DIAG_COUNT(sched->per_lthread_cache, available);
+		count += DIAG_COUNT(sched->cond_cache, available);
+		count += DIAG_COUNT(sched->mutex_cache, available);
+
+		/* the node pool does not consume a stub node */
+		if (sched->qnode_pool->fast_alloc != NULL)
+			count++;
+		count += DIAG_COUNT(sched->qnode_pool, available);
+
+		capacity += DIAG_COUNT(sched->qnode_pool, capacity);
+	}
+	if (count != capacity) {
+		RTE_LOG(CRIT, LTHREAD,
+			"Scheduler caches are inconsistent\n");
+	} else {
+		RTE_LOG(INFO, LTHREAD,
+			"Scheduler caches are ok\n");
+	}
+#endif
+}
+
+
+#if LTHREAD_DIAG
+/*
+ * Display node pool stats
+ */
+static inline void
+_qnode_pool_display(DIAG_USED struct qnode_pool *p)
+{
+
+	printf(DIAG_CACHE_STATS_FORMAT,
+			p->name,
+			DIAG_COUNT(p, rd),
+			DIAG_COUNT(p, wr),
+			DIAG_COUNT(p, available),
+			DIAG_COUNT(p, prealloc),
+			DIAG_COUNT(p, capacity));
+	fflush(stdout);
+}
+#endif
+
+
+#if LTHREAD_DIAG
+/*
+ * Display queue stats
+ */
+static inline void
+_lthread_queue_display(DIAG_USED struct lthread_queue *q)
+{
+#if DISPLAY_OBJCACHE_QUEUES
+	printf(DIAG_QUEUE_STATS_FORMAT,
+			q->name,
+			DIAG_COUNT(q, rd),
+			DIAG_COUNT(q, wr),
+			DIAG_COUNT(q, size));
+	fflush(stdout);
+#else
+	printf("%s: queue stats disabled\n",
+			q->name);
+
+#endif
+}
+#endif
+
+#if LTHREAD_DIAG
+/*
+ * Display objcache stats
+ */
+static inline void
+_objcache_display(DIAG_USED struct lthread_objcache *c)
+{
+
+	printf(DIAG_CACHE_STATS_FORMAT,
+			c->name,
+			DIAG_COUNT(c, rd),
+			DIAG_COUNT(c, wr),
+			DIAG_COUNT(c, available),
+			DIAG_COUNT(c, prealloc),
+			DIAG_COUNT(c, capacity));
+	_lthread_queue_display(c->q);
+	fflush(stdout);
+}
+#endif
+
+/*
+ * Display sched stats
+ */
+void
+lthread_sched_stats_display(void)
+{
+#if LTHREAD_DIAG
+	int i;
+	struct lthread_sched *sched;
+
+	for (i = 0; i < LTHREAD_MAX_LCORES; i++) {
+		sched = schedcore[i];
+		if (sched != NULL) {
+			printf(DIAG_SCHED_STATS_FORMAT,
+					sched->lcore_id,
+					"rd",
+					"wr",
+					"present",
+					"nb preallocs",
+					"capacity");
+			_lthread_queue_display(sched->ready);
+			_lthread_queue_display(sched->pready);
+			_qnode_pool_display(sched->qnode_pool);
+			_objcache_display(sched->lthread_cache);
+			_objcache_display(sched->stack_cache);
+			_objcache_display(sched->tls_cache);
+			_objcache_display(sched->per_lthread_cache);
+			_objcache_display(sched->cond_cache);
+			_objcache_display(sched->mutex_cache);
+		fflush(stdout);
+		}
+	}
+	_sched_stats_consistency_check();
+#else
+	RTE_LOG(INFO, LTHREAD,
+		"lthread diagnostics disabled\n"
+		"hint - set LTHREAD_DIAG in lthread_diag_api.h\n");
+#endif
+}
+
+/*
+ * Defafult diagnostic callback
+ */
+static uint64_t
+_lthread_diag_default_cb(uint64_t time, struct lthread *lt, int diag_event,
+		uint64_t diag_ref, const char *text, uint64_t p1, uint64_t p2)
+{
+	uint64_t _p2;
+	int lcore = (int) rte_lcore_id();
+
+	switch (diag_event) {
+	case LT_DIAG_LTHREAD_CREATE:
+	case LT_DIAG_MUTEX_CREATE:
+	case LT_DIAG_COND_CREATE:
+		_p2 = dummy_ref;
+		break;
+	default:
+		_p2 = p2;
+		break;
+	}
+
+	printf("%"PRIu64" %d %8.8lx %8.8lx %s %8.8lx %8.8lx\n",
+		time,
+		lcore,
+		(uint64_t) lt,
+		diag_ref,
+		text,
+		p1,
+		_p2);
+
+	return dummy_ref++;
+}
+
+/*
+ * plug in default diag callback with mask off
+ */
+void _lthread_diag_ctor(void)__attribute__((constructor));
+void _lthread_diag_ctor(void)
+{
+	diag_cb = _lthread_diag_default_cb;
+	diag_mask = 0;
+}
+
+
+/*
+ * enable diagnostics
+ */
+void lthread_diagnostic_enable(DIAG_USED diag_callback cb,
+				DIAG_USED uint64_t mask)
+{
+#if LTHREAD_DIAG
+	if (cb == NULL)
+		diag_cb = _lthread_diag_default_cb;
+	else
+		diag_cb = cb;
+	diag_mask = mask;
+#else
+	RTE_LOG(INFO, LTHREAD,
+		"LTHREAD_DIAG is not set, see lthread_diag_api.h\n");
+#endif
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.h
new file mode 100644
index 00000000..3dce8e0e
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag.h
@@ -0,0 +1,141 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_DIAG_H_
+#define LTHREAD_DIAG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <inttypes.h>
+
+#include <rte_log.h>
+#include <rte_common.h>
+
+#include "lthread_api.h"
+#include "lthread_diag_api.h"
+
+extern diag_callback diag_cb;
+
+extern const char *diag_event_text[];
+extern uint64_t diag_mask;
+
+/* max size of name strings */
+#define LT_MAX_NAME_SIZE 64
+
+#if LTHREAD_DIAG
+#define DISPLAY_OBJCACHE_QUEUES 1
+
+/*
+ * Generate a diagnostic trace or event in the case where an object is created.
+ *
+ * The value returned by the callback is stored in the object.
+ *
+ * @ param obj
+ *  pointer to the object that was created
+ * @ param ev
+ *  the event code
+ *
+ */
+#define DIAG_CREATE_EVENT(obj, ev) do {					\
+	struct lthread *ct = RTE_PER_LCORE(this_sched)->current_lthread;\
+	if ((BIT(ev) & diag_mask) && (ev < LT_DIAG_EVENT_MAX)) {	\
+		(obj)->diag_ref = (diag_cb)(rte_rdtsc(),		\
+					ct,				\
+					(ev),				\
+					0,				\
+					diag_event_text[(ev)],		\
+					(uint64_t)obj,			\
+					0);				\
+	}								\
+} while (0)
+
+/*
+ * Generate a diagnostic trace event.
+ *
+ * @ param obj
+ *  pointer to the lthread, cond or mutex object
+ * @ param ev
+ *  the event code
+ * @ param p1
+ *  object specific value ( see lthread_diag_api.h )
+ * @ param p2
+ *  object specific value ( see lthread_diag_api.h )
+ */
+#define DIAG_EVENT(obj, ev, p1, p2) do {				\
+	struct lthread *ct = RTE_PER_LCORE(this_sched)->current_lthread;\
+	if ((BIT(ev) & diag_mask) && (ev < LT_DIAG_EVENT_MAX)) {	\
+		(diag_cb)(rte_rdtsc(),					\
+				ct,					\
+				ev,					\
+				(obj)->diag_ref,			\
+				diag_event_text[(ev)],			\
+				(uint64_t)(p1),				\
+				(uint64_t)(p2));			\
+	}								\
+} while (0)
+
+#define DIAG_COUNT_DEFINE(x) rte_atomic64_t count_##x
+#define DIAG_COUNT_INIT(o, x) rte_atomic64_init(&((o)->count_##x))
+#define DIAG_COUNT_INC(o, x) rte_atomic64_inc(&((o)->count_##x))
+#define DIAG_COUNT_DEC(o, x) rte_atomic64_dec(&((o)->count_##x))
+#define DIAG_COUNT(o, x) rte_atomic64_read(&((o)->count_##x))
+
+#define DIAG_USED
+
+#else
+
+/* no diagnostics configured */
+
+#define DISPLAY_OBJCACHE_QUEUES 0
+
+#define DIAG_CREATE_EVENT(obj, ev)
+#define DIAG_EVENT(obj, ev, p1, p)
+
+#define DIAG_COUNT_DEFINE(x)
+#define DIAG_COUNT_INIT(o, x) do {} while (0)
+#define DIAG_COUNT_INC(o, x) do {} while (0)
+#define DIAG_COUNT_DEC(o, x) do {} while (0)
+#define DIAG_COUNT(o, x) 0
+
+#define DIAG_USED __rte_unused
+
+#endif				/* LTHREAD_DIAG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_DIAG_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_diag_api.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag_api.h
new file mode 100644
index 00000000..2fda0951
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_diag_api.h
@@ -0,0 +1,333 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef LTHREAD_DIAG_API_H_
+#define LTHREAD_DIAG_API_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <inttypes.h>
+
+/*
+ * Enable diagnostics
+ * 0 = conditionally compiled out
+ * 1 = compiled in and maskable at run time, see below for details
+ */
+#define LTHREAD_DIAG 0
+
+/**
+ *
+ * @file lthread_diag_api.h
+ *
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice
+ *
+ * lthread diagnostic interface
+ *
+ * If enabled via configuration file option ( tbd ) the lthread subsystem
+ * can generate selected trace information, either RTE_LOG  (INFO) messages,
+ * or else invoke a user supplied callback function when any of the events
+ * listed below occur.
+ *
+ * Reporting of events can be selectively masked, the bit position in the
+ * mask is determined by the corresponding event identifier listed below.
+ *
+ * Diagnostics are enabled by registering the callback function and mask
+ * using the API lthread_diagnostic_enable().
+ *
+ * Various interesting parameters are passed to the callback, including the
+ * time in cpu clks, the lthread id, the diagnostic event id, a user ref value,
+ * event text string, object being traced, and two context dependent parameters
+ * (p1 and p2). The meaning of the two parameters p1 and p2 depends on
+ * the specific event.
+ *
+ * The events LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE and
+ * LT_DIAG_COND_CREATE are implicitly enabled if the event mask includes any of
+ * the LT_DIAG_LTHREAD_XXX, LT_DIAG_MUTEX_XXX or LT_DIAG_COND_XXX events
+ * respectively.
+ *
+ * These create events may also be included in the mask discreetly if it is
+ * desired to monitor only create events.
+ *
+ * @param  time
+ *  The time in cpu clks at which the event occurred
+ *
+ * @param  lthread
+ *  The current lthread
+ *
+ * @param diag_event
+ *  The diagnostic event id (bit position in the mask)
+ *
+ * @param  diag_ref
+ *
+ * For LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE or LT_DIAG_COND_CREATE
+ * this parameter is not used and set to 0.
+ * All other events diag_ref contains the user ref value returned by the
+ * callback function when lthread is created.
+ *
+ * The diag_ref values assigned to mutex and cond var can be retrieved
+ * using the APIs lthread_mutex_diag_ref(), and lthread_cond_diag_ref()
+ * respectively.
+ *
+ * @param p1
+ *  see below
+ *
+ * @param p1
+ *  see below
+ *
+ * @returns
+ * For LT_DIAG_LTHREAD_CREATE, LT_DIAG_MUTEX_CREATE or LT_DIAG_COND_CREATE
+ * expects a user diagnostic ref value that will be saved in the lthread, mutex
+ * or cond var.
+ *
+ * For all other events return value is ignored.
+ *
+ *	LT_DIAG_SCHED_CREATE - Invoked when a scheduler is created
+ *		p1 = the scheduler that was created
+ *		p2 = not used
+ *		return value will be ignored
+ *
+ *	LT_DIAG_SCHED_SHUTDOWN - Invoked when a shutdown request is received
+ *		p1 = the scheduler to be shutdown
+ *		p2 = not used
+ *		return value will be ignored
+ *
+ *	LT_DIAG_LTHREAD_CREATE - Invoked when a thread is created
+ *		p1 = the lthread that was created
+ *		p2 = not used
+ *		return value will be stored in the lthread
+ *
+ *	LT_DIAG_LTHREAD_EXIT - Invoked when a lthread exits
+ *		p2 = 0 if the thread was already joined
+ *		p2 = 1 if the thread was not already joined
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_JOIN - Invoked when a lthread exits
+ *		p1 = the lthread that is being joined
+ *		p2 = 0 if the thread was already exited
+ *		p2 = 1 if the thread was not already exited
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_CANCELLED - Invoked when an lthread is cancelled
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_DETACH - Invoked when an lthread is detached
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_FREE - Invoked when an lthread is freed
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_SUSPENDED - Invoked when an lthread is suspended
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_YIELD - Invoked when an lthread explicitly yields
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_RESCHEDULED - Invoked when an lthread is rescheduled
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_RESUMED - Invoked when an lthread is resumed
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_AFFINITY - Invoked when an lthread is affinitised
+ *		p1 = the destination lcore_id
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_TMR_START - Invoked when an lthread starts a timer
+ *		p1 = address of timer node
+ *		p2 = the timeout value
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_TMR_DELETE - Invoked when an lthread deletes a timer
+ *		p1 = address of the timer node
+ *		p2 = 0 the timer and the was successfully deleted
+ *		p2 = not usee
+ *		return val ignored
+ *
+ *	LT_DIAG_LTHREAD_TMR_EXPIRED - Invoked when an lthread timer expires
+ *		p1 = address of scheduler the timer expired on
+ *		p2 = the thread associated with the timer
+ *		return val ignored
+ *
+ *	LT_DIAG_COND_CREATE - Invoked when a condition variable is created
+ *		p1 = address of cond var that was created
+ *		p2 = not used
+ *		return diag ref value will be stored in the condition variable
+ *
+ *	LT_DIAG_COND_DESTROY - Invoked when a condition variable is destroyed
+ *		p1 = not used
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_COND_WAIT - Invoked when an lthread waits on a cond var
+ *		p1 = the address of the condition variable
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_COND_SIGNAL - Invoked when an lthread signals a cond var
+ *		p1 = the address of the cond var
+ *		p2 = the lthread that was signalled, or error code
+ *		return val ignored
+ *
+ *	LT_DIAG_COND_BROADCAST - Invoked when an lthread broadcasts a cond var
+ *		p1 = the address of the condition variable
+ *		p2 = the lthread(s) that are signalled, or error code
+ *
+ *	LT_DIAG_MUTEX_CREATE - Invoked when a mutex is created
+ *		p1 = address of muex
+ *		p2 = not used
+ *		return diag ref value will be stored in the mutex variable
+ *
+ *	LT_DIAG_MUTEX_DESTROY - Invoked when a mutex is destroyed
+ *		p1 = address of mutex
+ *		p2 = not used
+ *		return val ignored
+ *
+ *	LT_DIAG_MUTEX_LOCK - Invoked when a mutex lock is obtained
+ *		p1 = address of mutex
+ *		p2 = function return value
+ *		return val ignored
+ *
+ *	LT_DIAG_MUTEX_BLOCKED  - Invoked when an lthread blocks on a mutex
+ *		p1 = address of mutex
+ *		p2 = function return value
+ *		return val ignored
+ *
+ *	LT_DIAG_MUTEX_TRYLOCK - Invoked when a mutex try lock is attempted
+ *		p1 = address of mutex
+ *		p2 = the function return value
+ *		return val ignored
+ *
+ *	LT_DIAG_MUTEX_UNLOCKED - Invoked when a mutex is unlocked
+ *		p1 = address of mutex
+ *		p2 = the thread that was unlocked, or error code
+ *		return val ignored
+ */
+typedef uint64_t (*diag_callback) (uint64_t time, struct lthread *lt,
+				  int diag_event, uint64_t diag_ref,
+				const char *text, uint64_t p1, uint64_t p2);
+
+/*
+ * Set user diagnostic callback and mask
+ * If the callback function pointer is NULL the default
+ * callback handler will be restored.
+ */
+void lthread_diagnostic_enable(diag_callback cb, uint64_t diag_mask);
+
+/*
+ * Set diagnostic mask
+ */
+void lthread_diagnostic_set_mask(uint64_t mask);
+
+/*
+ * lthread diagnostic callback
+ */
+enum lthread_diag_ev {
+	/* bits 0 - 14 lthread flag group */
+	LT_DIAG_LTHREAD_CREATE,		/* 00 mask 0x00000001 */
+	LT_DIAG_LTHREAD_EXIT,		/* 01 mask 0x00000002 */
+	LT_DIAG_LTHREAD_JOIN,		/* 02 mask 0x00000004 */
+	LT_DIAG_LTHREAD_CANCEL,		/* 03 mask 0x00000008 */
+	LT_DIAG_LTHREAD_DETACH,		/* 04 mask 0x00000010 */
+	LT_DIAG_LTHREAD_FREE,		/* 05 mask 0x00000020 */
+	LT_DIAG_LTHREAD_SUSPENDED,	/* 06 mask 0x00000040 */
+	LT_DIAG_LTHREAD_YIELD,		/* 07 mask 0x00000080 */
+	LT_DIAG_LTHREAD_RESCHEDULED,	/* 08 mask 0x00000100 */
+	LT_DIAG_LTHREAD_SLEEP,		/* 09 mask 0x00000200 */
+	LT_DIAG_LTHREAD_RESUMED,	/* 10 mask 0x00000400 */
+	LT_DIAG_LTHREAD_AFFINITY,	/* 11 mask 0x00000800 */
+	LT_DIAG_LTHREAD_TMR_START,	/* 12 mask 0x00001000 */
+	LT_DIAG_LTHREAD_TMR_DELETE,	/* 13 mask 0x00002000 */
+	LT_DIAG_LTHREAD_TMR_EXPIRED,	/* 14 mask 0x00004000 */
+	/* bits 15 - 19 conditional variable flag group */
+	LT_DIAG_COND_CREATE,		/* 15 mask 0x00008000 */
+	LT_DIAG_COND_DESTROY,		/* 16 mask 0x00010000 */
+	LT_DIAG_COND_WAIT,		/* 17 mask 0x00020000 */
+	LT_DIAG_COND_SIGNAL,		/* 18 mask 0x00040000 */
+	LT_DIAG_COND_BROADCAST,		/* 19 mask 0x00080000 */
+	/* bits 20 - 25 mutex flag group */
+	LT_DIAG_MUTEX_CREATE,		/* 20 mask 0x00100000 */
+	LT_DIAG_MUTEX_DESTROY,		/* 21 mask 0x00200000 */
+	LT_DIAG_MUTEX_LOCK,		/* 22 mask 0x00400000 */
+	LT_DIAG_MUTEX_TRYLOCK,		/* 23 mask 0x00800000 */
+	LT_DIAG_MUTEX_BLOCKED,		/* 24 mask 0x01000000 */
+	LT_DIAG_MUTEX_UNLOCKED,		/* 25 mask 0x02000000 */
+	/* bits 26 - 27 scheduler flag group - 8 bits */
+	LT_DIAG_SCHED_CREATE,		/* 26 mask 0x04000000 */
+	LT_DIAG_SCHED_SHUTDOWN,		/* 27 mask 0x08000000 */
+	LT_DIAG_EVENT_MAX
+};
+
+#define LT_DIAG_ALL 0xffffffffffffffff
+
+
+/*
+ * Display scheduler stats
+ */
+void
+lthread_sched_stats_display(void);
+
+/*
+ * return the diagnostic ref val stored in a condition var
+ */
+uint64_t
+lthread_cond_diag_ref(struct lthread_cond *c);
+
+/*
+ * return the diagnostic ref val stored in a mutex
+ */
+uint64_t
+lthread_mutex_diag_ref(struct lthread_mutex *m);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_DIAG_API_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_int.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_int.h
new file mode 100644
index 00000000..3f7fb92d
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_int.h
@@ -0,0 +1,208 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software may have been derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef LTHREAD_INT_H
+#include <lthread_api.h>
+#define LTHREAD_INT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <pthread.h>
+#include <time.h>
+
+#include <rte_memory.h>
+#include <rte_cycles.h>
+#include <rte_per_lcore.h>
+#include <rte_timer.h>
+#include <rte_atomic_64.h>
+#include <rte_spinlock.h>
+#include <ctx.h>
+
+#include <lthread_api.h>
+#include "lthread.h"
+#include "lthread_diag.h"
+#include "lthread_tls.h"
+
+struct lthread;
+struct lthread_sched;
+struct lthread_cond;
+struct lthread_mutex;
+struct lthread_key;
+
+struct key_pool;
+struct qnode;
+struct qnode_pool;
+struct lthread_sched;
+struct lthread_tls;
+
+
+#define BIT(x) (1 << (x))
+#define CLEARBIT(x) ~(1 << (x))
+
+#define POSIX_ERRNO(x)  (x)
+
+#define MAX_LTHREAD_NAME_SIZE 64
+
+#define RTE_LOGTYPE_LTHREAD RTE_LOGTYPE_USER1
+
+
+/* define some shorthand for current scheduler and current thread */
+#define THIS_SCHED RTE_PER_LCORE(this_sched)
+#define THIS_LTHREAD RTE_PER_LCORE(this_sched)->current_lthread
+
+/*
+ * Definition of an scheduler struct
+ */
+struct lthread_sched {
+	struct ctx ctx;					/* cpu context */
+	uint64_t birth;					/* time created */
+	struct lthread *current_lthread;		/* running thread */
+	unsigned lcore_id;				/* this sched lcore */
+	int run_flag;					/* sched shutdown */
+	uint64_t nb_blocked_threads;	/* blocked threads */
+	struct lthread_queue *ready;			/* local ready queue */
+	struct lthread_queue *pready;			/* peer ready queue */
+	struct lthread_objcache *lthread_cache;		/* free lthreads */
+	struct lthread_objcache *stack_cache;		/* free stacks */
+	struct lthread_objcache *per_lthread_cache;	/* free per lthread */
+	struct lthread_objcache *tls_cache;		/* free TLS */
+	struct lthread_objcache *cond_cache;		/* free cond vars */
+	struct lthread_objcache *mutex_cache;		/* free mutexes */
+	struct qnode_pool *qnode_pool;		/* pool of queue nodes */
+	struct key_pool *key_pool;		/* pool of free TLS keys */
+	size_t stack_size;
+	uint64_t diag_ref;				/* diag ref */
+} __rte_cache_aligned;
+
+RTE_DECLARE_PER_LCORE(struct lthread_sched *, this_sched);
+
+
+/*
+ * State for an lthread
+ */
+enum lthread_st {
+	ST_LT_INIT,		/* initial state */
+	ST_LT_READY,		/* lthread is ready to run */
+	ST_LT_SLEEPING,		/* lthread is sleeping */
+	ST_LT_EXPIRED,		/* lthread timeout has expired  */
+	ST_LT_EXITED,		/* lthread has exited and needs cleanup */
+	ST_LT_DETACH,		/* lthread frees on exit*/
+	ST_LT_CANCELLED,	/* lthread has been cancelled */
+};
+
+/*
+ * lthread sub states for exit/join
+ */
+enum join_st {
+	LT_JOIN_INITIAL,	/* initial state */
+	LT_JOIN_EXITING,	/* thread is exiting */
+	LT_JOIN_THREAD_SET,	/* joining thread has been set */
+	LT_JOIN_EXIT_VAL_SET,	/* exiting thread has set ret val */
+	LT_JOIN_EXIT_VAL_READ,	/* joining thread has collected ret val */
+};
+
+/* defnition of an lthread stack object */
+struct lthread_stack {
+	uint8_t stack[LTHREAD_MAX_STACK_SIZE];
+	size_t stack_size;
+	struct lthread_sched *root_sched;
+} __rte_cache_aligned;
+
+/*
+ * Definition of an lthread
+ */
+struct lthread {
+	struct ctx ctx;				/* cpu context */
+
+	uint64_t state;				/* current lthread state */
+
+	struct lthread_sched *sched;		/* current scheduler */
+	void *stack;				/* ptr to actual stack */
+	size_t stack_size;			/* current stack_size */
+	size_t last_stack_size;			/* last yield  stack_size */
+	lthread_func_t fun;			/* func ctx is running */
+	void *arg;				/* func args passed to func */
+	void *per_lthread_data;			/* per lthread user data */
+	lthread_exit_func exit_handler;		/* called when thread exits */
+	uint64_t birth;				/* time lthread was born */
+	struct lthread_queue *pending_wr_queue;	/* deferred  queue to write */
+	struct lthread *lt_join;		/* lthread to join on */
+	uint64_t join;				/* state for joining */
+	void **lt_exit_ptr;			/* exit ptr for lthread_join */
+	struct lthread_sched *root_sched;	/* thread was created here*/
+	struct queue_node *qnode;		/* node when in a queue */
+	struct rte_timer tim;			/* sleep timer */
+	struct lthread_tls *tls;		/* keys in use by the thread */
+	struct lthread_stack *stack_container;	/* stack */
+	char funcname[MAX_LTHREAD_NAME_SIZE];	/* thread func name */
+	uint64_t diag_ref;			/* ref to user diag data */
+} __rte_cache_aligned;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_INT_H */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.c b/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.c
new file mode 100644
index 00000000..c1bc6271
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.c
@@ -0,0 +1,253 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+
+#include <rte_per_lcore.h>
+#include <rte_log.h>
+#include <rte_spinlock.h>
+#include <rte_common.h>
+
+#include "lthread_api.h"
+#include "lthread_int.h"
+#include "lthread_mutex.h"
+#include "lthread_sched.h"
+#include "lthread_queue.h"
+#include "lthread_objcache.h"
+#include "lthread_diag.h"
+
+/*
+ * Create a mutex
+ */
+int
+lthread_mutex_init(char *name, struct lthread_mutex **mutex,
+		   __rte_unused const struct lthread_mutexattr *attr)
+{
+	struct lthread_mutex *m;
+
+	if (mutex == NULL)
+		return POSIX_ERRNO(EINVAL);
+
+
+	m = _lthread_objcache_alloc((THIS_SCHED)->mutex_cache);
+	if (m == NULL)
+		return POSIX_ERRNO(EAGAIN);
+
+	m->blocked = _lthread_queue_create("blocked queue");
+	if (m->blocked == NULL) {
+		_lthread_objcache_free((THIS_SCHED)->mutex_cache, m);
+		return POSIX_ERRNO(EAGAIN);
+	}
+
+	if (name == NULL)
+		strncpy(m->name, "no name", sizeof(m->name));
+	else
+		strncpy(m->name, name, sizeof(m->name));
+	m->name[sizeof(m->name)-1] = 0;
+
+	m->root_sched = THIS_SCHED;
+	m->owner = NULL;
+
+	rte_atomic64_init(&m->count);
+
+	DIAG_CREATE_EVENT(m, LT_DIAG_MUTEX_CREATE);
+	/* success */
+	(*mutex) = m;
+	return 0;
+}
+
+/*
+ * Destroy a mutex
+ */
+int lthread_mutex_destroy(struct lthread_mutex *m)
+{
+	if ((m == NULL) || (m->blocked == NULL)) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_DESTROY, m, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	if (m->owner == NULL) {
+		/* try to delete the blocked queue */
+		if (_lthread_queue_destroy(m->blocked) < 0) {
+			DIAG_EVENT(m, LT_DIAG_MUTEX_DESTROY,
+					m, POSIX_ERRNO(EBUSY));
+			return POSIX_ERRNO(EBUSY);
+		}
+
+		/* free the mutex to cache */
+		_lthread_objcache_free(m->root_sched->mutex_cache, m);
+		DIAG_EVENT(m, LT_DIAG_MUTEX_DESTROY, m, 0);
+		return 0;
+	}
+	/* can't do its still in use */
+	DIAG_EVENT(m, LT_DIAG_MUTEX_DESTROY, m, POSIX_ERRNO(EBUSY));
+	return POSIX_ERRNO(EBUSY);
+}
+
+/*
+ * Try to obtain a mutex
+ */
+int lthread_mutex_lock(struct lthread_mutex *m)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	if ((m == NULL) || (m->blocked == NULL)) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_LOCK, m, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	/* allow no recursion */
+	if (m->owner == lt) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_LOCK, m, POSIX_ERRNO(EDEADLK));
+		return POSIX_ERRNO(EDEADLK);
+	}
+
+	for (;;) {
+		rte_atomic64_inc(&m->count);
+		do {
+			if (rte_atomic64_cmpset
+			    ((uint64_t *) &m->owner, 0, (uint64_t) lt)) {
+				/* happy days, we got the lock */
+				DIAG_EVENT(m, LT_DIAG_MUTEX_LOCK, m, 0);
+				return 0;
+			}
+			/* spin due to race with unlock when
+			* nothing was blocked
+			*/
+		} while ((rte_atomic64_read(&m->count) == 1) &&
+				(m->owner == NULL));
+
+		/* queue the current thread in the blocked queue
+		 * we defer this to after we return to the scheduler
+		 * to ensure that the current thread context is saved
+		 * before unlock could result in it being dequeued and
+		 * resumed
+		 */
+		DIAG_EVENT(m, LT_DIAG_MUTEX_BLOCKED, m, lt);
+		lt->pending_wr_queue = m->blocked;
+		/* now relinquish cpu */
+		_suspend();
+		/* resumed, must loop and compete for the lock again */
+	}
+	return 0;
+}
+
+/* try to lock a mutex but dont block */
+int lthread_mutex_trylock(struct lthread_mutex *m)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	if ((m == NULL) || (m->blocked == NULL)) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_TRYLOCK, m, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	if (m->owner == lt) {
+		/* no recursion */
+		DIAG_EVENT(m, LT_DIAG_MUTEX_TRYLOCK, m, POSIX_ERRNO(EDEADLK));
+		return POSIX_ERRNO(EDEADLK);
+	}
+
+	rte_atomic64_inc(&m->count);
+	if (rte_atomic64_cmpset
+	    ((uint64_t *) &m->owner, (uint64_t) NULL, (uint64_t) lt)) {
+		/* got the lock */
+		DIAG_EVENT(m, LT_DIAG_MUTEX_TRYLOCK, m, 0);
+		return 0;
+	}
+
+	/* failed so return busy */
+	rte_atomic64_dec(&m->count);
+	DIAG_EVENT(m, LT_DIAG_MUTEX_TRYLOCK, m, POSIX_ERRNO(EBUSY));
+	return POSIX_ERRNO(EBUSY);
+}
+
+/*
+ * Unlock a mutex
+ */
+int lthread_mutex_unlock(struct lthread_mutex *m)
+{
+	struct lthread *lt = THIS_LTHREAD;
+	struct lthread *unblocked;
+
+	if ((m == NULL) || (m->blocked == NULL)) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_UNLOCKED, m, POSIX_ERRNO(EINVAL));
+		return POSIX_ERRNO(EINVAL);
+	}
+
+	/* fail if its owned */
+	if (m->owner != lt || m->owner == NULL) {
+		DIAG_EVENT(m, LT_DIAG_MUTEX_UNLOCKED, m, POSIX_ERRNO(EPERM));
+		return POSIX_ERRNO(EPERM);
+	}
+
+	rte_atomic64_dec(&m->count);
+	/* if there are blocked threads then make one ready */
+	while (rte_atomic64_read(&m->count) > 0) {
+		unblocked = _lthread_queue_remove(m->blocked);
+
+		if (unblocked != NULL) {
+			rte_atomic64_dec(&m->count);
+			DIAG_EVENT(m, LT_DIAG_MUTEX_UNLOCKED, m, unblocked);
+			RTE_ASSERT(unblocked->sched != NULL);
+			_ready_queue_insert((struct lthread_sched *)
+					    unblocked->sched, unblocked);
+			break;
+		}
+	}
+	/* release the lock */
+	m->owner = NULL;
+	return 0;
+}
+
+/*
+ * return the diagnostic ref val stored in a mutex
+ */
+uint64_t
+lthread_mutex_diag_ref(struct lthread_mutex *m)
+{
+	if (m == NULL)
+		return 0;
+	return m->diag_ref;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.h
new file mode 100644
index 00000000..e78db91d
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_mutex.h
@@ -0,0 +1,60 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef LTHREAD_MUTEX_H_
+#define LTHREAD_MUTEX_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_queue.h"
+
+
+#define MAX_MUTEX_NAME_SIZE 64
+
+struct lthread_mutex {
+	struct lthread *owner;
+	rte_atomic64_t	count;
+	struct lthread_queue *blocked __rte_cache_aligned;
+	struct lthread_sched *root_sched;
+	char			name[MAX_MUTEX_NAME_SIZE];
+	uint64_t		diag_ref; /* optional ref to user diag data */
+} __rte_cache_aligned;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTHREAD_MUTEX_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_objcache.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_objcache.h
new file mode 100644
index 00000000..6e5195ba
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_objcache.h
@@ -0,0 +1,165 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef LTHREAD_OBJCACHE_H_
+#define LTHREAD_OBJCACHE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <string.h>
+
+#include <rte_per_lcore.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+
+#include "lthread_int.h"
+#include "lthread_diag.h"
+#include "lthread_queue.h"
+
+
+RTE_DECLARE_PER_LCORE(struct lthread_sched *, this_sched);
+
+struct lthread_objcache {
+	struct lthread_queue *q;
+	size_t obj_size;
+	int prealloc_size;
+	char name[LT_MAX_NAME_SIZE];
+
+	DIAG_COUNT_DEFINE(rd);
+	DIAG_COUNT_DEFINE(wr);
+	DIAG_COUNT_DEFINE(prealloc);
+	DIAG_COUNT_DEFINE(capacity);
+	DIAG_COUNT_DEFINE(available);
+};
+
+/*
+ * Create a cache
+ */
+static inline struct
+lthread_objcache *_lthread_objcache_create(const char *name,
+					size_t obj_size,
+					int prealloc_size)
+{
+	struct lthread_objcache *c =
+	    rte_malloc_socket(NULL, sizeof(struct lthread_objcache),
+				RTE_CACHE_LINE_SIZE,
+				rte_socket_id());
+	if (c == NULL)
+		return NULL;
+
+	c->q = _lthread_queue_create("cache queue");
+	if (c->q == NULL) {
+		rte_free(c);
+		return NULL;
+	}
+	c->obj_size = obj_size;
+	c->prealloc_size = prealloc_size;
+
+	if (name != NULL)
+		strncpy(c->name, name, LT_MAX_NAME_SIZE);
+	c->name[sizeof(c->name)-1] = 0;
+
+	DIAG_COUNT_INIT(c, rd);
+	DIAG_COUNT_INIT(c, wr);
+	DIAG_COUNT_INIT(c, prealloc);
+	DIAG_COUNT_INIT(c, capacity);
+	DIAG_COUNT_INIT(c, available);
+	return c;
+}
+
+/*
+ * Destroy an objcache
+ */
+static inline int
+_lthread_objcache_destroy(struct lthread_objcache *c)
+{
+	if (_lthread_queue_destroy(c->q) == 0) {
+		rte_free(c);
+		return 0;
+	}
+	return -1;
+}
+
+/*
+ * Allocate an object from an object cache
+ */
+static inline void *
+_lthread_objcache_alloc(struct lthread_objcache *c)
+{
+	int i;
+	void *data;
+	struct lthread_queue *q = c->q;
+	size_t obj_size = c->obj_size;
+	int prealloc_size = c->prealloc_size;
+
+	data = _lthread_queue_remove(q);
+
+	if (data == NULL) {
+		DIAG_COUNT_INC(c, prealloc);
+		for (i = 0; i < prealloc_size; i++) {
+			data =
+			    rte_zmalloc_socket(NULL, obj_size,
+					RTE_CACHE_LINE_SIZE,
+					rte_socket_id());
+			if (data == NULL)
+				return NULL;
+
+			DIAG_COUNT_INC(c, available);
+			DIAG_COUNT_INC(c, capacity);
+			_lthread_queue_insert_mp(q, data);
+		}
+		data = _lthread_queue_remove(q);
+	}
+	DIAG_COUNT_INC(c, rd);
+	DIAG_COUNT_DEC(c, available);
+	return data;
+}
+
+/*
+ * free an object to a cache
+ */
+static inline void
+_lthread_objcache_free(struct lthread_objcache *c, void *obj)
+{
+	DIAG_COUNT_INC(c, wr);
+	DIAG_COUNT_INC(c, available);
+	_lthread_queue_insert_mp(c->q, obj);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_OBJCACHE_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_pool.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_pool.h
new file mode 100644
index 00000000..fb0c578b
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_pool.h
@@ -0,0 +1,339 @@
+/*
+ *-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the producer
+ * consumer queues described by Dmitry Vyukov and published  here
+ * http://www.1024cores.net
+ *
+ * Copyright (c) 2010-2011 Dmitry Vyukov. All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DMITRY VYUKOV "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DMITRY VYUKOV OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of Dmitry Vyukov.
+ */
+
+#ifndef LTHREAD_POOL_H_
+#define LTHREAD_POOL_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rte_malloc.h>
+#include <rte_per_lcore.h>
+#include <rte_log.h>
+
+#include "lthread_int.h"
+#include "lthread_diag.h"
+
+/*
+ * This file implements pool of queue nodes used by the queue implemented
+ * in lthread_queue.h.
+ *
+ * The pool is an intrusive lock free MPSC queue.
+ *
+ * The pool is created empty and populated lazily, i.e. on first attempt to
+ * allocate a the pool.
+ *
+ * Whenever the pool is empty more nodes are added to the pool
+ * The number of nodes preallocated in this way is a parameter of
+ * _qnode_pool_create. Freeing an object returns it to the pool.
+ *
+ * Each lthread scheduler maintains its own pool of nodes. L-threads must always
+ * allocate from this local pool ( because it is a single consumer queue ).
+ * L-threads can free nodes to any pool (because it is a multi producer queue)
+ * This enables threads that have affined to a different scheduler to free
+ * nodes safely.
+ */
+
+struct qnode;
+struct qnode_cache;
+
+/*
+ * define intermediate node
+ */
+struct qnode {
+	struct qnode *next;
+	void *data;
+	struct qnode_pool *pool;
+} __rte_cache_aligned;
+
+/*
+ * a pool structure
+ */
+struct qnode_pool {
+	struct qnode *head;
+	struct qnode *stub;
+	struct qnode *fast_alloc;
+	struct qnode *tail __rte_cache_aligned;
+	int pre_alloc;
+	char name[LT_MAX_NAME_SIZE];
+
+	DIAG_COUNT_DEFINE(rd);
+	DIAG_COUNT_DEFINE(wr);
+	DIAG_COUNT_DEFINE(available);
+	DIAG_COUNT_DEFINE(prealloc);
+	DIAG_COUNT_DEFINE(capacity);
+} __rte_cache_aligned;
+
+/*
+ * Create a pool of qnodes
+ */
+
+static inline struct qnode_pool *
+_qnode_pool_create(const char *name, int prealloc_size) {
+
+	struct qnode_pool *p = rte_malloc_socket(NULL,
+					sizeof(struct qnode_pool),
+					RTE_CACHE_LINE_SIZE,
+					rte_socket_id());
+
+	RTE_ASSERT(p);
+
+	p->stub = rte_malloc_socket(NULL,
+				sizeof(struct qnode),
+				RTE_CACHE_LINE_SIZE,
+				rte_socket_id());
+
+	RTE_ASSERT(p->stub);
+
+	if (name != NULL)
+		strncpy(p->name, name, LT_MAX_NAME_SIZE);
+	p->name[sizeof(p->name)-1] = 0;
+
+	p->stub->pool = p;
+	p->stub->next = NULL;
+	p->tail = p->stub;
+	p->head = p->stub;
+	p->pre_alloc = prealloc_size;
+
+	DIAG_COUNT_INIT(p, rd);
+	DIAG_COUNT_INIT(p, wr);
+	DIAG_COUNT_INIT(p, available);
+	DIAG_COUNT_INIT(p, prealloc);
+	DIAG_COUNT_INIT(p, capacity);
+
+	return p;
+}
+
+
+/*
+ * Insert a node into the pool
+ */
+static inline void __attribute__ ((always_inline))
+_qnode_pool_insert(struct qnode_pool *p, struct qnode *n)
+{
+	n->next = NULL;
+	struct qnode *prev = n;
+	/* We insert at the head */
+	prev = (struct qnode *) __sync_lock_test_and_set((uint64_t *)&p->head,
+						(uint64_t) prev);
+	/* there is a window of inconsistency until prev next is set */
+	/* which is why remove must retry */
+	prev->next = (n);
+}
+
+/*
+ * Remove a node from the pool
+ *
+ * There is a race with _qnode_pool_insert() whereby the queue could appear
+ * empty during a concurrent insert, this is handled by retrying
+ *
+ * The queue uses a stub node, which must be swung as the queue becomes
+ * empty, this requires an insert of the stub, which means that removing the
+ * last item from the queue incurs the penalty of an atomic exchange. Since the
+ * pool is maintained with a bulk pre-allocation the cost of this is amortised.
+ */
+static inline struct qnode *__attribute__ ((always_inline))
+_pool_remove(struct qnode_pool *p)
+{
+	struct qnode *head;
+	struct qnode *tail = p->tail;
+	struct qnode *next = tail->next;
+
+	/* we remove from the tail */
+	if (tail == p->stub) {
+		if (next == NULL)
+			return NULL;
+		/* advance the tail */
+		p->tail = next;
+		tail = next;
+		next = next->next;
+	}
+	if (likely(next != NULL)) {
+		p->tail = next;
+		return tail;
+	}
+
+	head = p->head;
+	if (tail == head)
+		return NULL;
+
+	/* swing stub node */
+	_qnode_pool_insert(p, p->stub);
+
+	next = tail->next;
+	if (next) {
+		p->tail = next;
+		return tail;
+	}
+	return NULL;
+}
+
+
+/*
+ * This adds a retry to the _pool_remove function
+ * defined above
+ */
+static inline struct qnode *__attribute__ ((always_inline))
+_qnode_pool_remove(struct qnode_pool *p)
+{
+	struct qnode *n;
+
+	do {
+		n = _pool_remove(p);
+		if (likely(n != NULL))
+			return n;
+
+		rte_compiler_barrier();
+	}  while ((p->head != p->tail) &&
+			(p->tail != p->stub));
+	return NULL;
+}
+
+/*
+ * Allocate a node from the pool
+ * If the pool is empty add mode nodes
+ */
+static inline struct qnode *__attribute__ ((always_inline))
+_qnode_alloc(void)
+{
+	struct qnode_pool *p = (THIS_SCHED)->qnode_pool;
+	int prealloc_size = p->pre_alloc;
+	struct qnode *n;
+	int i;
+
+	if (likely(p->fast_alloc != NULL)) {
+		n = p->fast_alloc;
+		p->fast_alloc = NULL;
+		return n;
+	}
+
+	n = _qnode_pool_remove(p);
+
+	if (unlikely(n == NULL)) {
+		DIAG_COUNT_INC(p, prealloc);
+		for (i = 0; i < prealloc_size; i++) {
+			n = rte_malloc_socket(NULL,
+					sizeof(struct qnode),
+					RTE_CACHE_LINE_SIZE,
+					rte_socket_id());
+			if (n == NULL)
+				return NULL;
+
+			DIAG_COUNT_INC(p, available);
+			DIAG_COUNT_INC(p, capacity);
+
+			n->pool = p;
+			_qnode_pool_insert(p, n);
+		}
+		n = _qnode_pool_remove(p);
+	}
+	n->pool = p;
+	DIAG_COUNT_INC(p, rd);
+	DIAG_COUNT_DEC(p, available);
+	return n;
+}
+
+
+
+/*
+* free a queue node to the per scheduler pool from which it came
+*/
+static inline void __attribute__ ((always_inline))
+_qnode_free(struct qnode *n)
+{
+	struct qnode_pool *p = n->pool;
+
+
+	if (unlikely(p->fast_alloc != NULL) ||
+			unlikely(n->pool != (THIS_SCHED)->qnode_pool)) {
+		DIAG_COUNT_INC(p, wr);
+		DIAG_COUNT_INC(p, available);
+		_qnode_pool_insert(p, n);
+		return;
+	}
+	p->fast_alloc = n;
+}
+
+/*
+ * Destroy an qnode pool
+ * queue must be empty when this is called
+ */
+static inline int
+_qnode_pool_destroy(struct qnode_pool *p)
+{
+	rte_free(p->stub);
+	rte_free(p);
+	return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_POOL_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_queue.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_queue.h
new file mode 100644
index 00000000..4fc2074e
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_queue.h
@@ -0,0 +1,309 @@
+/*
+ *-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the producer
+ * consumer queues described by Dmitry Vyukov and published  here
+ * http://www.1024cores.net
+ *
+ * Copyright (c) 2010-2011 Dmitry Vyukov. All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DMITRY VYUKOV "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DMITRY VYUKOV OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of Dmitry Vyukov.
+ */
+
+#ifndef LTHREAD_QUEUE_H_
+#define LTHREAD_QUEUE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <string.h>
+
+#include <rte_prefetch.h>
+#include <rte_per_lcore.h>
+
+#include "lthread_int.h"
+#include "lthread.h"
+#include "lthread_diag.h"
+#include "lthread_pool.h"
+
+struct lthread_queue;
+
+/*
+ * This file implements an unbounded FIFO queue based on a lock free
+ * linked list.
+ *
+ * The queue is non-intrusive in that it uses intermediate nodes, and does
+ * not require these nodes to be inserted into the object being placed
+ * in the queue.
+ *
+ * This is slightly more efficient than the very similar queue in lthread_pool
+ * in that it does not have to swing a stub node as the queue becomes empty.
+ *
+ * The queue access functions allocate and free intermediate node
+ * transparently from/to a per scheduler pool ( see lthread_pool.h ).
+ *
+ * The queue provides both MPSC and SPSC insert methods
+ */
+
+/*
+ * define a queue of lthread nodes
+ */
+struct lthread_queue {
+	struct qnode *head;
+	struct qnode *tail __rte_cache_aligned;
+	struct lthread_queue *p;
+	char name[LT_MAX_NAME_SIZE];
+
+	DIAG_COUNT_DEFINE(rd);
+	DIAG_COUNT_DEFINE(wr);
+	DIAG_COUNT_DEFINE(size);
+
+} __rte_cache_aligned;
+
+
+
+static inline struct lthread_queue *
+_lthread_queue_create(const char *name)
+{
+	struct qnode *stub;
+	struct lthread_queue *new_queue;
+
+	new_queue = rte_malloc_socket(NULL, sizeof(struct lthread_queue),
+					RTE_CACHE_LINE_SIZE,
+					rte_socket_id());
+	if (new_queue == NULL)
+		return NULL;
+
+	/* allocated stub node */
+	stub = _qnode_alloc();
+	RTE_ASSERT(stub);
+
+	if (name != NULL)
+		strncpy(new_queue->name, name, sizeof(new_queue->name));
+	new_queue->name[sizeof(new_queue->name)-1] = 0;
+
+	/* initialize queue as empty */
+	stub->next = NULL;
+	new_queue->head = stub;
+	new_queue->tail = stub;
+
+	DIAG_COUNT_INIT(new_queue, rd);
+	DIAG_COUNT_INIT(new_queue, wr);
+	DIAG_COUNT_INIT(new_queue, size);
+
+	return new_queue;
+}
+
+/**
+ * Return true if the queue is empty
+ */
+static inline int __attribute__ ((always_inline))
+_lthread_queue_empty(struct lthread_queue *q)
+{
+	return q->tail == q->head;
+}
+
+
+
+/**
+ * Destroy a queue
+ * fail if queue is not empty
+ */
+static inline int _lthread_queue_destroy(struct lthread_queue *q)
+{
+	if (q == NULL)
+		return -1;
+
+	if (!_lthread_queue_empty(q))
+		return -1;
+
+	_qnode_free(q->head);
+	rte_free(q);
+	return 0;
+}
+
+RTE_DECLARE_PER_LCORE(struct lthread_sched *, this_sched);
+
+/*
+ * Insert a node into a queue
+ * this implementation is multi producer safe
+ */
+static inline struct qnode *__attribute__ ((always_inline))
+_lthread_queue_insert_mp(struct lthread_queue
+							  *q, void *data)
+{
+	struct qnode *prev;
+	struct qnode *n = _qnode_alloc();
+
+	if (n == NULL)
+		return NULL;
+
+	/* set object in node */
+	n->data = data;
+	n->next = NULL;
+
+	/* this is an MPSC method, perform a locked update */
+	prev = n;
+	prev =
+	    (struct qnode *)__sync_lock_test_and_set((uint64_t *) &(q)->head,
+					       (uint64_t) prev);
+	/* there is a window of inconsistency until prev next is set,
+	 * which is why remove must retry
+	 */
+	prev->next = n;
+
+	DIAG_COUNT_INC(q, wr);
+	DIAG_COUNT_INC(q, size);
+
+	return n;
+}
+
+/*
+ * Insert an node into a queue in single producer mode
+ * this implementation is NOT mult producer safe
+ */
+static inline struct qnode *__attribute__ ((always_inline))
+_lthread_queue_insert_sp(struct lthread_queue
+							  *q, void *data)
+{
+	/* allocate a queue node */
+	struct qnode *prev;
+	struct qnode *n = _qnode_alloc();
+
+	if (n == NULL)
+		return NULL;
+
+	/* set data in node */
+	n->data = data;
+	n->next = NULL;
+
+	/* this is an SPSC method, no need for locked exchange operation */
+	prev = q->head;
+	prev->next = q->head = n;
+
+	DIAG_COUNT_INC(q, wr);
+	DIAG_COUNT_INC(q, size);
+
+	return n;
+}
+
+/*
+ * Remove a node from a queue
+ */
+static inline void *__attribute__ ((always_inline))
+_lthread_queue_poll(struct lthread_queue *q)
+{
+	void *data = NULL;
+	struct qnode *tail = q->tail;
+	struct qnode *next = (struct qnode *)tail->next;
+	/*
+	 * There is a small window of inconsistency between producer and
+	 * consumer whereby the queue may appear empty if consumer and
+	 * producer access it at the same time.
+	 * The consumer must handle this by retrying
+	 */
+
+	if (likely(next != NULL)) {
+		q->tail = next;
+		tail->data = next->data;
+		data = tail->data;
+
+		/* free the node */
+		_qnode_free(tail);
+
+		DIAG_COUNT_INC(q, rd);
+		DIAG_COUNT_DEC(q, size);
+		return data;
+	}
+	return NULL;
+}
+
+/*
+ * Remove a node from a queue
+ */
+static inline void *__attribute__ ((always_inline))
+_lthread_queue_remove(struct lthread_queue *q)
+{
+	void *data = NULL;
+
+	/*
+	 * There is a small window of inconsistency between producer and
+	 * consumer whereby the queue may appear empty if consumer and
+	 * producer access it at the same time. We handle this by retrying
+	 */
+	do {
+		data = _lthread_queue_poll(q);
+
+		if (likely(data != NULL)) {
+
+			DIAG_COUNT_INC(q, rd);
+			DIAG_COUNT_DEC(q, size);
+			return data;
+		}
+		rte_compiler_barrier();
+	} while (unlikely(!_lthread_queue_empty(q)));
+	return NULL;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_QUEUE_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.c b/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.c
new file mode 100644
index 00000000..c64c21ff
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.c
@@ -0,0 +1,599 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+#define RTE_MEM 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sched.h>
+
+#include <rte_prefetch.h>
+#include <rte_per_lcore.h>
+#include <rte_atomic.h>
+#include <rte_atomic_64.h>
+#include <rte_log.h>
+#include <rte_common.h>
+#include <rte_branch_prediction.h>
+
+#include "lthread_api.h"
+#include "lthread_int.h"
+#include "lthread_sched.h"
+#include "lthread_objcache.h"
+#include "lthread_timer.h"
+#include "lthread_mutex.h"
+#include "lthread_cond.h"
+#include "lthread_tls.h"
+#include "lthread_diag.h"
+
+/*
+ * This file implements the lthread scheduler
+ * The scheduler is the function lthread_run()
+ * This must be run as the main loop of an EAL thread.
+ *
+ * Currently once a scheduler is created it cannot be destroyed
+ * When a scheduler shuts down it is assumed that the application is terminating
+ */
+
+static rte_atomic16_t num_schedulers;
+static rte_atomic16_t active_schedulers;
+
+/* one scheduler per lcore */
+RTE_DEFINE_PER_LCORE(struct lthread_sched *, this_sched) = NULL;
+
+struct lthread_sched *schedcore[LTHREAD_MAX_LCORES];
+
+diag_callback diag_cb;
+
+uint64_t diag_mask;
+
+
+/* constructor */
+void lthread_sched_ctor(void) __attribute__ ((constructor));
+void lthread_sched_ctor(void)
+{
+	memset(schedcore, 0, sizeof(schedcore));
+	rte_atomic16_init(&num_schedulers);
+	rte_atomic16_set(&num_schedulers, 1);
+	rte_atomic16_init(&active_schedulers);
+	rte_atomic16_set(&active_schedulers, 0);
+	diag_cb = NULL;
+}
+
+
+enum sched_alloc_phase {
+	SCHED_ALLOC_OK,
+	SCHED_ALLOC_QNODE_POOL,
+	SCHED_ALLOC_READY_QUEUE,
+	SCHED_ALLOC_PREADY_QUEUE,
+	SCHED_ALLOC_LTHREAD_CACHE,
+	SCHED_ALLOC_STACK_CACHE,
+	SCHED_ALLOC_PERLT_CACHE,
+	SCHED_ALLOC_TLS_CACHE,
+	SCHED_ALLOC_COND_CACHE,
+	SCHED_ALLOC_MUTEX_CACHE,
+};
+
+static int
+_lthread_sched_alloc_resources(struct lthread_sched *new_sched)
+{
+	int alloc_status;
+
+	do {
+		/* Initialize per scheduler queue node pool */
+		alloc_status = SCHED_ALLOC_QNODE_POOL;
+		new_sched->qnode_pool =
+			_qnode_pool_create("qnode pool", LTHREAD_PREALLOC);
+		if (new_sched->qnode_pool == NULL)
+			break;
+
+		/* Initialize per scheduler local ready queue */
+		alloc_status = SCHED_ALLOC_READY_QUEUE;
+		new_sched->ready = _lthread_queue_create("ready queue");
+		if (new_sched->ready == NULL)
+			break;
+
+		/* Initialize per scheduler local peer ready queue */
+		alloc_status = SCHED_ALLOC_PREADY_QUEUE;
+		new_sched->pready = _lthread_queue_create("pready queue");
+		if (new_sched->pready == NULL)
+			break;
+
+		/* Initialize per scheduler local free lthread cache */
+		alloc_status = SCHED_ALLOC_LTHREAD_CACHE;
+		new_sched->lthread_cache =
+			_lthread_objcache_create("lthread cache",
+						sizeof(struct lthread),
+						LTHREAD_PREALLOC);
+		if (new_sched->lthread_cache == NULL)
+			break;
+
+		/* Initialize per scheduler local free stack cache */
+		alloc_status = SCHED_ALLOC_STACK_CACHE;
+		new_sched->stack_cache =
+			_lthread_objcache_create("stack_cache",
+						sizeof(struct lthread_stack),
+						LTHREAD_PREALLOC);
+		if (new_sched->stack_cache == NULL)
+			break;
+
+		/* Initialize per scheduler local free per lthread data cache */
+		alloc_status = SCHED_ALLOC_PERLT_CACHE;
+		new_sched->per_lthread_cache =
+			_lthread_objcache_create("per_lt cache",
+						RTE_PER_LTHREAD_SECTION_SIZE,
+						LTHREAD_PREALLOC);
+		if (new_sched->per_lthread_cache == NULL)
+			break;
+
+		/* Initialize per scheduler local free tls cache */
+		alloc_status = SCHED_ALLOC_TLS_CACHE;
+		new_sched->tls_cache =
+			_lthread_objcache_create("TLS cache",
+						sizeof(struct lthread_tls),
+						LTHREAD_PREALLOC);
+		if (new_sched->tls_cache == NULL)
+			break;
+
+		/* Initialize per scheduler local free cond var cache */
+		alloc_status = SCHED_ALLOC_COND_CACHE;
+		new_sched->cond_cache =
+			_lthread_objcache_create("cond cache",
+						sizeof(struct lthread_cond),
+						LTHREAD_PREALLOC);
+		if (new_sched->cond_cache == NULL)
+			break;
+
+		/* Initialize per scheduler local free mutex cache */
+		alloc_status = SCHED_ALLOC_MUTEX_CACHE;
+		new_sched->mutex_cache =
+			_lthread_objcache_create("mutex cache",
+						sizeof(struct lthread_mutex),
+						LTHREAD_PREALLOC);
+		if (new_sched->mutex_cache == NULL)
+			break;
+
+		alloc_status = SCHED_ALLOC_OK;
+	} while (0);
+
+	/* roll back on any failure */
+	switch (alloc_status) {
+	case SCHED_ALLOC_MUTEX_CACHE:
+		_lthread_objcache_destroy(new_sched->cond_cache);
+		/* fall through */
+	case SCHED_ALLOC_COND_CACHE:
+		_lthread_objcache_destroy(new_sched->tls_cache);
+		/* fall through */
+	case SCHED_ALLOC_TLS_CACHE:
+		_lthread_objcache_destroy(new_sched->per_lthread_cache);
+		/* fall through */
+	case SCHED_ALLOC_PERLT_CACHE:
+		_lthread_objcache_destroy(new_sched->stack_cache);
+		/* fall through */
+	case SCHED_ALLOC_STACK_CACHE:
+		_lthread_objcache_destroy(new_sched->lthread_cache);
+		/* fall through */
+	case SCHED_ALLOC_LTHREAD_CACHE:
+		_lthread_queue_destroy(new_sched->pready);
+		/* fall through */
+	case SCHED_ALLOC_PREADY_QUEUE:
+		_lthread_queue_destroy(new_sched->ready);
+		/* fall through */
+	case SCHED_ALLOC_READY_QUEUE:
+		_qnode_pool_destroy(new_sched->qnode_pool);
+		/* fall through */
+	case SCHED_ALLOC_QNODE_POOL:
+		/* fall through */
+	case SCHED_ALLOC_OK:
+		break;
+	}
+	return alloc_status;
+}
+
+
+/*
+ * Create a scheduler on the current lcore
+ */
+struct lthread_sched *_lthread_sched_create(size_t stack_size)
+{
+	int status;
+	struct lthread_sched *new_sched;
+	unsigned lcoreid = rte_lcore_id();
+
+	RTE_ASSERT(stack_size <= LTHREAD_MAX_STACK_SIZE);
+
+	if (stack_size == 0)
+		stack_size = LTHREAD_MAX_STACK_SIZE;
+
+	new_sched =
+	     rte_calloc_socket(NULL, 1, sizeof(struct lthread_sched),
+				RTE_CACHE_LINE_SIZE,
+				rte_socket_id());
+	if (new_sched == NULL) {
+		RTE_LOG(CRIT, LTHREAD,
+			"Failed to allocate memory for scheduler\n");
+		return NULL;
+	}
+
+	_lthread_key_pool_init();
+
+	new_sched->stack_size = stack_size;
+	new_sched->birth = rte_rdtsc();
+	THIS_SCHED = new_sched;
+
+	status = _lthread_sched_alloc_resources(new_sched);
+	if (status != SCHED_ALLOC_OK) {
+		RTE_LOG(CRIT, LTHREAD,
+			"Failed to allocate resources for scheduler code = %d\n",
+			status);
+		rte_free(new_sched);
+		return NULL;
+	}
+
+	bzero(&new_sched->ctx, sizeof(struct ctx));
+
+	new_sched->lcore_id = lcoreid;
+
+	schedcore[lcoreid] = new_sched;
+
+	new_sched->run_flag = 1;
+
+	DIAG_EVENT(new_sched, LT_DIAG_SCHED_CREATE, rte_lcore_id(), 0);
+
+	rte_wmb();
+	return new_sched;
+}
+
+/*
+ * Set the number of schedulers in the system
+ */
+int lthread_num_schedulers_set(int num)
+{
+	rte_atomic16_set(&num_schedulers, num);
+	return (int)rte_atomic16_read(&num_schedulers);
+}
+
+/*
+ * Return the number of schedulers active
+ */
+int lthread_active_schedulers(void)
+{
+	return (int)rte_atomic16_read(&active_schedulers);
+}
+
+
+/**
+ * shutdown the scheduler running on the specified lcore
+ */
+void lthread_scheduler_shutdown(unsigned lcoreid)
+{
+	uint64_t coreid = (uint64_t) lcoreid;
+
+	if (coreid < LTHREAD_MAX_LCORES) {
+		if (schedcore[coreid] != NULL)
+			schedcore[coreid]->run_flag = 0;
+	}
+}
+
+/**
+ * shutdown all schedulers
+ */
+void lthread_scheduler_shutdown_all(void)
+{
+	uint64_t i;
+
+	/*
+	 * give time for all schedulers to have started
+	 * Note we use sched_yield() rather than pthread_yield() to allow
+	 * for the possibility of a pthread wrapper on lthread_yield(),
+	 * something that is not possible unless the scheduler is running.
+	 */
+	while (rte_atomic16_read(&active_schedulers) <
+	       rte_atomic16_read(&num_schedulers))
+		sched_yield();
+
+	for (i = 0; i < LTHREAD_MAX_LCORES; i++) {
+		if (schedcore[i] != NULL)
+			schedcore[i]->run_flag = 0;
+	}
+}
+
+/*
+ * Resume a suspended lthread
+ */
+static inline void
+_lthread_resume(struct lthread *lt) __attribute__ ((always_inline));
+static inline void _lthread_resume(struct lthread *lt)
+{
+	struct lthread_sched *sched = THIS_SCHED;
+	struct lthread_stack *s;
+	uint64_t state = lt->state;
+#if LTHREAD_DIAG
+	int init = 0;
+#endif
+
+	sched->current_lthread = lt;
+
+	if (state & (BIT(ST_LT_CANCELLED) | BIT(ST_LT_EXITED))) {
+		/* if detached we can free the thread now */
+		if (state & BIT(ST_LT_DETACH)) {
+			_lthread_free(lt);
+			sched->current_lthread = NULL;
+			return;
+		}
+	}
+
+	if (state & BIT(ST_LT_INIT)) {
+		/* first time this thread has been run */
+		/* assign thread to this scheduler */
+		lt->sched = THIS_SCHED;
+
+		/* allocate stack */
+		s = _stack_alloc();
+
+		lt->stack_container = s;
+		_lthread_set_stack(lt, s->stack, s->stack_size);
+
+		/* allocate memory for TLS used by this thread */
+		_lthread_tls_alloc(lt);
+
+		lt->state = BIT(ST_LT_READY);
+#if LTHREAD_DIAG
+		init = 1;
+#endif
+	}
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_RESUMED, init, lt);
+
+	/* switch to the new thread */
+	ctx_switch(&lt->ctx, &sched->ctx);
+
+	/* If posting to a queue that could be read by another lcore
+	 * we defer the queue write till now to ensure the context has been
+	 * saved before the other core tries to resume it
+	 * This applies to blocking on mutex, cond, and to set_affinity
+	 */
+	if (lt->pending_wr_queue != NULL) {
+		struct lthread_queue *dest = lt->pending_wr_queue;
+
+		lt->pending_wr_queue = NULL;
+
+		/* queue the current thread to the specified queue */
+		_lthread_queue_insert_mp(dest, lt);
+	}
+
+	sched->current_lthread = NULL;
+}
+
+/*
+ * Handle sleep timer expiry
+*/
+void
+_sched_timer_cb(struct rte_timer *tim, void *arg)
+{
+	struct lthread *lt = (struct lthread *) arg;
+	uint64_t state = lt->state;
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_EXPIRED, &lt->tim, 0);
+
+	rte_timer_stop(tim);
+
+	if (lt->state & BIT(ST_LT_CANCELLED))
+		(THIS_SCHED)->nb_blocked_threads--;
+
+	lt->state = state | BIT(ST_LT_EXPIRED);
+	_lthread_resume(lt);
+	lt->state = state & CLEARBIT(ST_LT_EXPIRED);
+}
+
+
+
+/*
+ * Returns 0 if there is a pending job in scheduler or 1 if done and can exit.
+ */
+static inline int _lthread_sched_isdone(struct lthread_sched *sched)
+{
+	return (sched->run_flag == 0) &&
+			(_lthread_queue_empty(sched->ready)) &&
+			(_lthread_queue_empty(sched->pready)) &&
+			(sched->nb_blocked_threads == 0);
+}
+
+/*
+ * Wait for all schedulers to start
+ */
+static inline void _lthread_schedulers_sync_start(void)
+{
+	rte_atomic16_inc(&active_schedulers);
+
+	/* wait for lthread schedulers
+	 * Note we use sched_yield() rather than pthread_yield() to allow
+	 * for the possibility of a pthread wrapper on lthread_yield(),
+	 * something that is not possible unless the scheduler is running.
+	 */
+	while (rte_atomic16_read(&active_schedulers) <
+	       rte_atomic16_read(&num_schedulers))
+		sched_yield();
+
+}
+
+/*
+ * Wait for all schedulers to stop
+ */
+static inline void _lthread_schedulers_sync_stop(void)
+{
+	rte_atomic16_dec(&active_schedulers);
+	rte_atomic16_dec(&num_schedulers);
+
+	/* wait for schedulers
+	 * Note we use sched_yield() rather than pthread_yield() to allow
+	 * for the possibility of a pthread wrapper on lthread_yield(),
+	 * something that is not possible unless the scheduler is running.
+	 */
+	while (rte_atomic16_read(&active_schedulers) > 0)
+		sched_yield();
+
+}
+
+
+/*
+ * Run the lthread scheduler
+ * This loop is the heart of the system
+ */
+void lthread_run(void)
+{
+
+	struct lthread_sched *sched = THIS_SCHED;
+	struct lthread *lt = NULL;
+
+	RTE_LOG(INFO, LTHREAD,
+		"starting scheduler %p on lcore %u phys core %u\n",
+		sched, rte_lcore_id(),
+		rte_lcore_index(rte_lcore_id()));
+
+	/* if more than one, wait for all schedulers to start */
+	_lthread_schedulers_sync_start();
+
+
+	/*
+	 * This is the main scheduling loop
+	 * So long as there are tasks in existence we run this loop.
+	 * We check for:-
+	 *   expired timers,
+	 *   the local ready queue,
+	 *   and the peer ready queue,
+	 *
+	 * and resume lthreads ad infinitum.
+	 */
+	while (!_lthread_sched_isdone(sched)) {
+
+		rte_timer_manage();
+
+		lt = _lthread_queue_poll(sched->ready);
+		if (lt != NULL)
+			_lthread_resume(lt);
+		lt = _lthread_queue_poll(sched->pready);
+		if (lt != NULL)
+			_lthread_resume(lt);
+	}
+
+
+	/* if more than one wait for all schedulers to stop */
+	_lthread_schedulers_sync_stop();
+
+	(THIS_SCHED) = NULL;
+
+	RTE_LOG(INFO, LTHREAD,
+		"stopping scheduler %p on lcore %u phys core %u\n",
+		sched, rte_lcore_id(),
+		rte_lcore_index(rte_lcore_id()));
+	fflush(stdout);
+}
+
+/*
+ * Return the scheduler for this lcore
+ *
+ */
+struct lthread_sched *_lthread_sched_get(int lcore_id)
+{
+	if (lcore_id > LTHREAD_MAX_LCORES)
+		return NULL;
+	return schedcore[lcore_id];
+}
+
+/*
+ * migrate the current thread to another scheduler running
+ * on the specified lcore.
+ */
+int lthread_set_affinity(unsigned lcoreid)
+{
+	struct lthread *lt = THIS_LTHREAD;
+	struct lthread_sched *dest_sched;
+
+	if (unlikely(lcoreid > LTHREAD_MAX_LCORES))
+		return POSIX_ERRNO(EINVAL);
+
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_AFFINITY, lcoreid, 0);
+
+	dest_sched = schedcore[lcoreid];
+
+	if (unlikely(dest_sched == NULL))
+		return POSIX_ERRNO(EINVAL);
+
+	if (likely(dest_sched != THIS_SCHED)) {
+		lt->sched = dest_sched;
+		lt->pending_wr_queue = dest_sched->pready;
+		_affinitize();
+		return 0;
+	}
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.h
new file mode 100644
index 00000000..7cddda9c
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_sched.h
@@ -0,0 +1,159 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Some portions of this software is derived from the
+ * https://github.com/halayli/lthread which carrys the following license.
+ *
+ * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_SCHED_H_
+#define LTHREAD_SCHED_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_int.h"
+#include "lthread_queue.h"
+#include "lthread_objcache.h"
+#include "lthread_diag.h"
+#include "ctx.h"
+
+/*
+ * insert an lthread into a queue
+ */
+static inline void
+_ready_queue_insert(struct lthread_sched *sched, struct lthread *lt)
+{
+	if (sched == THIS_SCHED)
+		_lthread_queue_insert_sp((THIS_SCHED)->ready, lt);
+	else
+		_lthread_queue_insert_mp(sched->pready, lt);
+}
+
+/*
+ * remove an lthread from a queue
+ */
+static inline struct lthread *_ready_queue_remove(struct lthread_queue *q)
+{
+	return _lthread_queue_remove(q);
+}
+
+/**
+ * Return true if the ready queue is empty
+ */
+static inline int _ready_queue_empty(struct lthread_queue *q)
+{
+	return _lthread_queue_empty(q);
+}
+
+static inline uint64_t _sched_now(void)
+{
+	uint64_t now = rte_rdtsc();
+
+	if (now > (THIS_SCHED)->birth)
+		return now - (THIS_SCHED)->birth;
+	if (now < (THIS_SCHED)->birth)
+		return (THIS_SCHED)->birth - now;
+	/* never return 0 because this means sleep forever */
+	return 1;
+}
+
+static inline void
+_affinitize(void) __attribute__ ((always_inline));
+static inline void
+_affinitize(void)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_SUSPENDED, 0, 0);
+	ctx_switch(&(THIS_SCHED)->ctx, &lt->ctx);
+}
+
+static inline void
+_suspend(void) __attribute__ ((always_inline));
+static inline void
+_suspend(void)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	(THIS_SCHED)->nb_blocked_threads++;
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_SUSPENDED, 0, 0);
+	ctx_switch(&(THIS_SCHED)->ctx, &lt->ctx);
+	(THIS_SCHED)->nb_blocked_threads--;
+}
+
+static inline void
+_reschedule(void) __attribute__ ((always_inline));
+static inline void
+_reschedule(void)
+{
+	struct lthread *lt = THIS_LTHREAD;
+
+	DIAG_EVENT(lt, LT_DIAG_LTHREAD_RESCHEDULED, 0, 0);
+	_ready_queue_insert(THIS_SCHED, lt);
+	ctx_switch(&(THIS_SCHED)->ctx, &lt->ctx);
+}
+
+extern struct lthread_sched *schedcore[];
+void _sched_timer_cb(struct rte_timer *tim, void *arg);
+void _sched_shutdown(__rte_unused void *arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_SCHED_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_timer.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_timer.h
new file mode 100644
index 00000000..7c03d673
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_timer.h
@@ -0,0 +1,97 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef LTHREAD_TIMER_H_
+#define LTHREAD_TIMER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_int.h"
+#include "lthread_sched.h"
+
+
+static inline uint64_t
+_ns_to_clks(uint64_t ns)
+{
+	/*
+	 * clkns needs to be divided by 1E9 to get ns clocks. However,
+	 * dividing by this first would lose a lot of accuracy.
+	 * Dividing after a multiply by ns, could cause overflow of
+	 * uint64_t if ns is about 5 seconds [if we assume a max tsc
+	 * rate of 4GHz]. Therefore we first divide by 1E4, then
+	 * multiply and finally divide by 1E5. This allows ns to be
+	 * values many hours long, without overflow, while still keeping
+	 * reasonable accuracy.
+	 */
+	uint64_t clkns = rte_get_tsc_hz() / 1e4;
+
+	clkns *= ns;
+	clkns /= 1e5;
+
+	return clkns;
+}
+
+
+static inline void
+_timer_start(struct lthread *lt, uint64_t clks)
+{
+	if (clks > 0) {
+		DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_START, &lt->tim, clks);
+		rte_timer_init(&lt->tim);
+		rte_timer_reset(&lt->tim,
+				clks,
+				SINGLE,
+				rte_lcore_id(),
+				_sched_timer_cb,
+				(void *)lt);
+	}
+}
+
+
+static inline void
+_timer_stop(struct lthread *lt)
+{
+	if (lt != NULL) {
+		DIAG_EVENT(lt, LT_DIAG_LTHREAD_TMR_DELETE, &lt->tim, 0);
+		rte_timer_stop(&lt->tim);
+	}
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTHREAD_TIMER_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.c b/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.c
new file mode 100644
index 00000000..47505f2d
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.c
@@ -0,0 +1,252 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sched.h>
+
+#include <rte_malloc.h>
+#include <rte_log.h>
+#include <rte_ring.h>
+#include <rte_atomic_64.h>
+
+#include "lthread_tls.h"
+#include "lthread_queue.h"
+#include "lthread_objcache.h"
+#include "lthread_sched.h"
+
+static struct rte_ring *key_pool;
+static uint64_t key_pool_init;
+
+/* needed to cause section start and end to be defined */
+RTE_DEFINE_PER_LTHREAD(void *, dummy);
+
+static struct lthread_key key_table[LTHREAD_MAX_KEYS];
+
+void lthread_tls_ctor(void) __attribute__((constructor));
+
+void lthread_tls_ctor(void)
+{
+	key_pool = NULL;
+	key_pool_init = 0;
+}
+
+/*
+ * Initialize a pool of keys
+ * These are unique tokens that can be obtained by threads
+ * calling lthread_key_create()
+ */
+void _lthread_key_pool_init(void)
+{
+	static struct rte_ring *pool;
+	struct lthread_key *new_key;
+	char name[MAX_LTHREAD_NAME_SIZE];
+
+	bzero(key_table, sizeof(key_table));
+
+	/* only one lcore should do this */
+	if (rte_atomic64_cmpset(&key_pool_init, 0, 1)) {
+
+		snprintf(name,
+			MAX_LTHREAD_NAME_SIZE,
+			"lthread_key_pool_%d",
+			getpid());
+
+		pool = rte_ring_create(name,
+					LTHREAD_MAX_KEYS, 0, 0);
+		RTE_ASSERT(pool);
+
+		int i;
+
+		for (i = 1; i < LTHREAD_MAX_KEYS; i++) {
+			new_key = &key_table[i];
+			rte_ring_mp_enqueue((struct rte_ring *)pool,
+						(void *)new_key);
+		}
+		key_pool = pool;
+	}
+	/* other lcores wait here till done */
+	while (key_pool == NULL) {
+		rte_compiler_barrier();
+		sched_yield();
+	};
+}
+
+/*
+ * Create a key
+ * this means getting a key from the the pool
+ */
+int lthread_key_create(unsigned int *key, tls_destructor_func destructor)
+{
+	if (key == NULL)
+		return POSIX_ERRNO(EINVAL);
+
+	struct lthread_key *new_key;
+
+	if (rte_ring_mc_dequeue((struct rte_ring *)key_pool, (void **)&new_key)
+	    == 0) {
+		new_key->destructor = destructor;
+		*key = (new_key - key_table);
+
+		return 0;
+	}
+	return POSIX_ERRNO(EAGAIN);
+}
+
+
+/*
+ * Delete a key
+ */
+int lthread_key_delete(unsigned int k)
+{
+	struct lthread_key *key;
+
+	key = (struct lthread_key *) &key_table[k];
+
+	if (k > LTHREAD_MAX_KEYS)
+		return POSIX_ERRNO(EINVAL);
+
+	key->destructor = NULL;
+	rte_ring_mp_enqueue((struct rte_ring *)key_pool,
+					(void *)key);
+	return 0;
+}
+
+
+
+/*
+ * Break association for all keys in use by this thread
+ * invoke the destructor if available.
+ * Since a destructor can create keys we could enter an infinite loop
+ * therefore we give up after LTHREAD_DESTRUCTOR_ITERATIONS
+ * the behavior is modelled on pthread
+ */
+void _lthread_tls_destroy(struct lthread *lt)
+{
+	int i, k;
+	int nb_keys;
+	void *data;
+
+	for (i = 0; i < LTHREAD_DESTRUCTOR_ITERATIONS; i++) {
+
+		for (k = 1; k < LTHREAD_MAX_KEYS; k++) {
+
+			/* no keys in use ? */
+			nb_keys = lt->tls->nb_keys_inuse;
+			if (nb_keys == 0)
+				return;
+
+			/* this key not in use ? */
+			if (lt->tls->data[k] == NULL)
+				continue;
+
+			/* remove this key */
+			data = lt->tls->data[k];
+			lt->tls->data[k] = NULL;
+			lt->tls->nb_keys_inuse = nb_keys-1;
+
+			/* invoke destructor */
+			if (key_table[k].destructor != NULL)
+				key_table[k].destructor(data);
+		}
+	}
+}
+
+/*
+ * Return the pointer associated with a key
+ * If the key is no longer valid return NULL
+ */
+void
+*lthread_getspecific(unsigned int k)
+{
+
+	if (k > LTHREAD_MAX_KEYS)
+		return NULL;
+
+	return THIS_LTHREAD->tls->data[k];
+}
+
+/*
+ * Set a value against a key
+ * If the key is no longer valid return an error
+ * when storing value
+ */
+int lthread_setspecific(unsigned int k, const void *data)
+{
+	if (k > LTHREAD_MAX_KEYS)
+		return POSIX_ERRNO(EINVAL);
+
+	int n = THIS_LTHREAD->tls->nb_keys_inuse;
+
+	/* discard const qualifier */
+	char *p = (char *) (uintptr_t) data;
+
+
+	if (data != NULL) {
+		if (THIS_LTHREAD->tls->data[k] == NULL)
+			THIS_LTHREAD->tls->nb_keys_inuse = n+1;
+	}
+
+	THIS_LTHREAD->tls->data[k] = (void *) p;
+	return 0;
+}
+
+/*
+ * Allocate data for TLS cache
+*/
+void _lthread_tls_alloc(struct lthread *lt)
+{
+	struct lthread_tls *tls;
+
+	tls = _lthread_objcache_alloc((THIS_SCHED)->tls_cache);
+
+	RTE_ASSERT(tls != NULL);
+
+	tls->root_sched = (THIS_SCHED);
+	lt->tls = tls;
+
+	/* allocate data for TLS varaiables using RTE_PER_LTHREAD macros */
+	if (sizeof(void *) < (uint64_t)RTE_PER_LTHREAD_SECTION_SIZE) {
+		lt->per_lthread_data =
+		    _lthread_objcache_alloc((THIS_SCHED)->per_lthread_cache);
+	}
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.h b/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.h
new file mode 100644
index 00000000..fff3c0db
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/common/lthread_tls.h
@@ -0,0 +1,64 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015  Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LTHREAD_TLS_H_
+#define LTHREAD_TLS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "lthread_api.h"
+
+#define RTE_PER_LTHREAD_SECTION_SIZE \
+(&__stop_per_lt - &__start_per_lt)
+
+struct lthread_key {
+	tls_destructor_func destructor;
+};
+
+struct lthread_tls {
+	void *data[LTHREAD_MAX_KEYS];
+	int  nb_keys_inuse;
+	struct lthread_sched *root_sched;
+};
+
+void _lthread_tls_destroy(struct lthread *lt);
+void _lthread_key_pool_init(void);
+void _lthread_tls_alloc(struct lthread *lt);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* LTHREAD_TLS_H_ */
diff --git a/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/Makefile b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/Makefile
new file mode 100644
index 00000000..d8fe5e68
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/Makefile
@@ -0,0 +1,57 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = l3fwd-thread
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+include $(RTE_SDK)/examples/performance-thread/common/common.mk
+
+CFLAGS += -O3 -g $(USER_FLAGS) $(INCLUDES) $(WERROR_FLAGS)
+
+# workaround for a gcc bug with noreturn attribute
+# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
+#ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
+CFLAGS_main.o += -Wno-return-type
+#endif
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/main.c b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/main.c
new file mode 100644
index 00000000..2d98473e
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/main.c
@@ -0,0 +1,3749 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_vect.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <rte_tcp.h>
+#include <rte_udp.h>
+#include <rte_string_fns.h>
+
+#include <cmdline_parse.h>
+#include <cmdline_parse_etheraddr.h>
+
+#include <lthread_api.h>
+
+#define APP_LOOKUP_EXACT_MATCH          0
+#define APP_LOOKUP_LPM                  1
+#define DO_RFC_1812_CHECKS
+
+/* Enable cpu-load stats 0-off, 1-on */
+#define APP_CPU_LOAD                 1
+
+#ifndef APP_LOOKUP_METHOD
+#define APP_LOOKUP_METHOD             APP_LOOKUP_LPM
+#endif
+
+#ifndef __GLIBC__ /* sched_getcpu() is glibc specific */
+#define sched_getcpu() rte_lcore_id()
+#endif
+
+static int
+check_ptype(int portid)
+{
+	int i, ret;
+	int ipv4 = 0, ipv6 = 0;
+
+	ret = rte_eth_dev_get_supported_ptypes(portid, RTE_PTYPE_L3_MASK, NULL,
+			0);
+	if (ret <= 0)
+		return 0;
+
+	uint32_t ptypes[ret];
+
+	ret = rte_eth_dev_get_supported_ptypes(portid, RTE_PTYPE_L3_MASK,
+			ptypes, ret);
+	for (i = 0; i < ret; ++i) {
+		if (ptypes[i] & RTE_PTYPE_L3_IPV4)
+			ipv4 = 1;
+		if (ptypes[i] & RTE_PTYPE_L3_IPV6)
+			ipv6 = 1;
+	}
+
+	if (ipv4 && ipv6)
+		return 1;
+
+	return 0;
+}
+
+static inline void
+parse_ptype(struct rte_mbuf *m)
+{
+	struct ether_hdr *eth_hdr;
+	uint32_t packet_type = RTE_PTYPE_UNKNOWN;
+	uint16_t ether_type;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	ether_type = eth_hdr->ether_type;
+	if (ether_type == rte_cpu_to_be_16(ETHER_TYPE_IPv4))
+		packet_type |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
+	else if (ether_type == rte_cpu_to_be_16(ETHER_TYPE_IPv6))
+		packet_type |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;
+
+	m->packet_type = packet_type;
+}
+
+static uint16_t
+cb_parse_ptype(__rte_unused uint8_t port, __rte_unused uint16_t queue,
+		struct rte_mbuf *pkts[], uint16_t nb_pkts,
+		__rte_unused uint16_t max_pkts, __rte_unused void *user_param)
+{
+	unsigned int i;
+
+	for (i = 0; i < nb_pkts; i++)
+		parse_ptype(pkts[i]);
+
+	return nb_pkts;
+}
+
+/*
+ *  When set to zero, simple forwaring path is eanbled.
+ *  When set to one, optimized forwarding path is enabled.
+ *  Note that LPM optimisation path uses SSE4.1 instructions.
+ */
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && !defined(__SSE4_1__))
+#define ENABLE_MULTI_BUFFER_OPTIMIZE	0
+#else
+#define ENABLE_MULTI_BUFFER_OPTIMIZE	1
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+#include <rte_hash.h>
+#elif (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+#include <rte_lpm.h>
+#include <rte_lpm6.h>
+#else
+#error "APP_LOOKUP_METHOD set to incorrect value"
+#endif
+
+#define RTE_LOGTYPE_L3FWD RTE_LOGTYPE_USER1
+
+#define MAX_JUMBO_PKT_LEN  9600
+
+#define IPV6_ADDR_LEN 16
+
+#define MEMPOOL_CACHE_SIZE 256
+
+/*
+ * This expression is used to calculate the number of mbufs needed depending on
+ * user input, taking into account memory for rx and tx hardware rings, cache
+ * per lcore and mtable per port per lcore. RTE_MAX is used to ensure that
+ * NB_MBUF never goes below a minimum value of 8192
+ */
+
+#define NB_MBUF RTE_MAX(\
+		(nb_ports*nb_rx_queue*RTE_TEST_RX_DESC_DEFAULT +       \
+		nb_ports*nb_lcores*MAX_PKT_BURST +                     \
+		nb_ports*n_tx_queue*RTE_TEST_TX_DESC_DEFAULT +         \
+		nb_lcores*MEMPOOL_CACHE_SIZE),                         \
+		(unsigned)8192)
+
+#define MAX_PKT_BURST     32
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+
+/*
+ * Try to avoid TX buffering if we have at least MAX_TX_BURST packets to send.
+ */
+#define	MAX_TX_BURST  (MAX_PKT_BURST / 2)
+#define BURST_SIZE    MAX_TX_BURST
+
+#define NB_SOCKETS 8
+
+/* Configure how many packets ahead to prefetch, when reading packets */
+#define PREFETCH_OFFSET	3
+
+/* Used to mark destination port as 'invalid'. */
+#define	BAD_PORT	((uint16_t)-1)
+
+#define FWDSTEP	4
+
+/*
+ * Configurable number of RX/TX ring descriptors
+ */
+#define RTE_TEST_RX_DESC_DEFAULT 128
+#define RTE_TEST_TX_DESC_DEFAULT 128
+static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
+static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
+
+/* ethernet addresses of ports */
+static uint64_t dest_eth_addr[RTE_MAX_ETHPORTS];
+static struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
+
+static __m128i val_eth[RTE_MAX_ETHPORTS];
+
+/* replace first 12B of the ethernet header. */
+#define	MASK_ETH 0x3f
+
+/* mask of enabled ports */
+static uint32_t enabled_port_mask;
+static int promiscuous_on; /**< Set in promiscuous mode off by default. */
+static int numa_on = 1;    /**< NUMA is enabled by default. */
+static int parse_ptype_on;
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+static int ipv6;           /**< ipv6 is false by default. */
+#endif
+
+#if (APP_CPU_LOAD == 1)
+
+#define MAX_CPU RTE_MAX_LCORE
+#define CPU_LOAD_TIMEOUT_US (5 * 1000 * 1000)  /**< Timeout for collecting 5s */
+
+#define CPU_PROCESS     0
+#define CPU_POLL        1
+#define MAX_CPU_COUNTER 2
+
+struct cpu_load {
+	uint16_t       n_cpu;
+	uint64_t       counter;
+	uint64_t       hits[MAX_CPU_COUNTER][MAX_CPU];
+} __rte_cache_aligned;
+
+static struct cpu_load cpu_load;
+static int cpu_load_lcore_id = -1;
+
+#define SET_CPU_BUSY(thread, counter) \
+		thread->conf.busy[counter] = 1
+
+#define SET_CPU_IDLE(thread, counter) \
+		thread->conf.busy[counter] = 0
+
+#define IS_CPU_BUSY(thread, counter) \
+		(thread->conf.busy[counter] > 0)
+
+#else
+
+#define SET_CPU_BUSY(thread, counter)
+#define SET_CPU_IDLE(thread, counter)
+#define IS_CPU_BUSY(thread, counter) 0
+
+#endif
+
+struct mbuf_table {
+	uint16_t len;
+	struct rte_mbuf *m_table[MAX_PKT_BURST];
+};
+
+struct lcore_rx_queue {
+	uint8_t port_id;
+	uint8_t queue_id;
+} __rte_cache_aligned;
+
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT  RTE_MAX_ETHPORTS
+#define MAX_RX_QUEUE_PER_PORT  128
+
+#define MAX_LCORE_PARAMS       1024
+struct rx_thread_params {
+	uint8_t port_id;
+	uint8_t queue_id;
+	uint8_t lcore_id;
+	uint8_t thread_id;
+} __rte_cache_aligned;
+
+static struct rx_thread_params rx_thread_params_array[MAX_LCORE_PARAMS];
+static struct rx_thread_params rx_thread_params_array_default[] = {
+	{0, 0, 2, 0},
+	{0, 1, 2, 1},
+	{0, 2, 2, 2},
+	{1, 0, 2, 3},
+	{1, 1, 2, 4},
+	{1, 2, 2, 5},
+	{2, 0, 2, 6},
+	{3, 0, 3, 7},
+	{3, 1, 3, 8},
+};
+
+static struct rx_thread_params *rx_thread_params =
+		rx_thread_params_array_default;
+static uint16_t nb_rx_thread_params = RTE_DIM(rx_thread_params_array_default);
+
+struct tx_thread_params {
+	uint8_t lcore_id;
+	uint8_t thread_id;
+} __rte_cache_aligned;
+
+static struct tx_thread_params tx_thread_params_array[MAX_LCORE_PARAMS];
+static struct tx_thread_params tx_thread_params_array_default[] = {
+	{4, 0},
+	{5, 1},
+	{6, 2},
+	{7, 3},
+	{8, 4},
+	{9, 5},
+	{10, 6},
+	{11, 7},
+	{12, 8},
+};
+
+static struct tx_thread_params *tx_thread_params =
+		tx_thread_params_array_default;
+static uint16_t nb_tx_thread_params = RTE_DIM(tx_thread_params_array_default);
+
+static struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.mq_mode = ETH_MQ_RX_RSS,
+		.max_rx_pkt_len = ETHER_MAX_LEN,
+		.split_hdr_size = 0,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 1, /**< IP checksum offload enabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 1, /**< CRC stripped by hardware */
+	},
+	.rx_adv_conf = {
+		.rss_conf = {
+			.rss_key = NULL,
+			.rss_hf = ETH_RSS_TCP,
+		},
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+static struct rte_mempool *pktmbuf_pool[NB_SOCKETS];
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#include <rte_hash_crc.h>
+#define DEFAULT_HASH_FUNC       rte_hash_crc
+#else
+#include <rte_jhash.h>
+#define DEFAULT_HASH_FUNC       rte_jhash
+#endif
+
+struct ipv4_5tuple {
+	uint32_t ip_dst;
+	uint32_t ip_src;
+	uint16_t port_dst;
+	uint16_t port_src;
+	uint8_t  proto;
+} __attribute__((__packed__));
+
+union ipv4_5tuple_host {
+	struct {
+		uint8_t  pad0;
+		uint8_t  proto;
+		uint16_t pad1;
+		uint32_t ip_src;
+		uint32_t ip_dst;
+		uint16_t port_src;
+		uint16_t port_dst;
+	};
+	__m128i xmm;
+};
+
+#define XMM_NUM_IN_IPV6_5TUPLE 3
+
+struct ipv6_5tuple {
+	uint8_t  ip_dst[IPV6_ADDR_LEN];
+	uint8_t  ip_src[IPV6_ADDR_LEN];
+	uint16_t port_dst;
+	uint16_t port_src;
+	uint8_t  proto;
+} __attribute__((__packed__));
+
+union ipv6_5tuple_host {
+	struct {
+		uint16_t pad0;
+		uint8_t  proto;
+		uint8_t  pad1;
+		uint8_t  ip_src[IPV6_ADDR_LEN];
+		uint8_t  ip_dst[IPV6_ADDR_LEN];
+		uint16_t port_src;
+		uint16_t port_dst;
+		uint64_t reserve;
+	};
+	__m128i xmm[XMM_NUM_IN_IPV6_5TUPLE];
+};
+
+struct ipv4_l3fwd_route {
+	struct ipv4_5tuple key;
+	uint8_t if_out;
+};
+
+struct ipv6_l3fwd_route {
+	struct ipv6_5tuple key;
+	uint8_t if_out;
+};
+
+static struct ipv4_l3fwd_route ipv4_l3fwd_route_array[] = {
+	{{IPv4(101, 0, 0, 0), IPv4(100, 10, 0, 1),  101, 11, IPPROTO_TCP}, 0},
+	{{IPv4(201, 0, 0, 0), IPv4(200, 20, 0, 1),  102, 12, IPPROTO_TCP}, 1},
+	{{IPv4(111, 0, 0, 0), IPv4(100, 30, 0, 1),  101, 11, IPPROTO_TCP}, 2},
+	{{IPv4(211, 0, 0, 0), IPv4(200, 40, 0, 1),  102, 12, IPPROTO_TCP}, 3},
+};
+
+static struct ipv6_l3fwd_route ipv6_l3fwd_route_array[] = {
+	{{
+	{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38,
+			0x05},
+	101, 11, IPPROTO_TCP}, 0},
+
+	{{
+	{0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38,
+			0x05},
+	102, 12, IPPROTO_TCP}, 1},
+
+	{{
+	{0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38,
+			0x05},
+	101, 11, IPPROTO_TCP}, 2},
+
+	{{
+	{0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38,
+			0x05},
+	102, 12, IPPROTO_TCP}, 3},
+};
+
+typedef struct rte_hash lookup_struct_t;
+static lookup_struct_t *ipv4_l3fwd_lookup_struct[NB_SOCKETS];
+static lookup_struct_t *ipv6_l3fwd_lookup_struct[NB_SOCKETS];
+
+#ifdef RTE_ARCH_X86_64
+/* default to 4 million hash entries (approx) */
+#define L3FWD_HASH_ENTRIES (1024*1024*4)
+#else
+/* 32-bit has less address-space for hugepage memory, limit to 1M entries */
+#define L3FWD_HASH_ENTRIES (1024*1024*1)
+#endif
+#define HASH_ENTRY_NUMBER_DEFAULT 4
+
+static uint32_t hash_entry_number = HASH_ENTRY_NUMBER_DEFAULT;
+
+static inline uint32_t
+ipv4_hash_crc(const void *data, __rte_unused uint32_t data_len,
+		uint32_t init_val)
+{
+	const union ipv4_5tuple_host *k;
+	uint32_t t;
+	const uint32_t *p;
+
+	k = data;
+	t = k->proto;
+	p = (const uint32_t *)&k->port_src;
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	init_val = rte_hash_crc_4byte(t, init_val);
+	init_val = rte_hash_crc_4byte(k->ip_src, init_val);
+	init_val = rte_hash_crc_4byte(k->ip_dst, init_val);
+	init_val = rte_hash_crc_4byte(*p, init_val);
+#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	init_val = rte_jhash_1word(t, init_val);
+	init_val = rte_jhash_1word(k->ip_src, init_val);
+	init_val = rte_jhash_1word(k->ip_dst, init_val);
+	init_val = rte_jhash_1word(*p, init_val);
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	return init_val;
+}
+
+static inline uint32_t
+ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len,
+		uint32_t init_val)
+{
+	const union ipv6_5tuple_host *k;
+	uint32_t t;
+	const uint32_t *p;
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	const uint32_t *ip_src0, *ip_src1, *ip_src2, *ip_src3;
+	const uint32_t *ip_dst0, *ip_dst1, *ip_dst2, *ip_dst3;
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+
+	k = data;
+	t = k->proto;
+	p = (const uint32_t *)&k->port_src;
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	ip_src0 = (const uint32_t *) k->ip_src;
+	ip_src1 = (const uint32_t *)(k->ip_src + 4);
+	ip_src2 = (const uint32_t *)(k->ip_src + 8);
+	ip_src3 = (const uint32_t *)(k->ip_src + 12);
+	ip_dst0 = (const uint32_t *) k->ip_dst;
+	ip_dst1 = (const uint32_t *)(k->ip_dst + 4);
+	ip_dst2 = (const uint32_t *)(k->ip_dst + 8);
+	ip_dst3 = (const uint32_t *)(k->ip_dst + 12);
+	init_val = rte_hash_crc_4byte(t, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src0, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src1, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src2, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src3, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst0, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst1, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst2, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst3, init_val);
+	init_val = rte_hash_crc_4byte(*p, init_val);
+#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	init_val = rte_jhash_1word(t, init_val);
+	init_val = rte_jhash(k->ip_src, sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
+	init_val = rte_jhash(k->ip_dst, sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
+	init_val = rte_jhash_1word(*p, init_val);
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	return init_val;
+}
+
+#define IPV4_L3FWD_NUM_ROUTES RTE_DIM(ipv4_l3fwd_route_array)
+#define IPV6_L3FWD_NUM_ROUTES RTE_DIM(ipv6_l3fwd_route_array)
+
+static uint8_t ipv4_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
+static uint8_t ipv6_l3fwd_out_if[L3FWD_HASH_ENTRIES] __rte_cache_aligned;
+
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+struct ipv4_l3fwd_route {
+	uint32_t ip;
+	uint8_t  depth;
+	uint8_t  if_out;
+};
+
+struct ipv6_l3fwd_route {
+	uint8_t ip[16];
+	uint8_t depth;
+	uint8_t if_out;
+};
+
+static struct ipv4_l3fwd_route ipv4_l3fwd_route_array[] = {
+	{IPv4(1, 1, 1, 0), 24, 0},
+	{IPv4(2, 1, 1, 0), 24, 1},
+	{IPv4(3, 1, 1, 0), 24, 2},
+	{IPv4(4, 1, 1, 0), 24, 3},
+	{IPv4(5, 1, 1, 0), 24, 4},
+	{IPv4(6, 1, 1, 0), 24, 5},
+	{IPv4(7, 1, 1, 0), 24, 6},
+	{IPv4(8, 1, 1, 0), 24, 7},
+};
+
+static struct ipv6_l3fwd_route ipv6_l3fwd_route_array[] = {
+	{{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 0},
+	{{2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 1},
+	{{3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 2},
+	{{4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 3},
+	{{5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 4},
+	{{6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 5},
+	{{7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 6},
+	{{8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, 48, 7},
+};
+
+#define IPV4_L3FWD_NUM_ROUTES RTE_DIM(ipv4_l3fwd_route_array)
+#define IPV6_L3FWD_NUM_ROUTES RTE_DIM(ipv6_l3fwd_route_array)
+
+#define IPV4_L3FWD_LPM_MAX_RULES         1024
+#define IPV6_L3FWD_LPM_MAX_RULES         1024
+#define IPV6_L3FWD_LPM_NUMBER_TBL8S (1 << 16)
+
+typedef struct rte_lpm lookup_struct_t;
+typedef struct rte_lpm6 lookup6_struct_t;
+static lookup_struct_t *ipv4_l3fwd_lookup_struct[NB_SOCKETS];
+static lookup6_struct_t *ipv6_l3fwd_lookup_struct[NB_SOCKETS];
+#endif
+
+struct lcore_conf {
+	lookup_struct_t *ipv4_lookup_struct;
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+	lookup6_struct_t *ipv6_lookup_struct;
+#else
+	lookup_struct_t *ipv6_lookup_struct;
+#endif
+	void *data;
+} __rte_cache_aligned;
+
+static struct lcore_conf lcore_conf[RTE_MAX_LCORE];
+RTE_DEFINE_PER_LCORE(struct lcore_conf *, lcore_conf);
+
+#define MAX_RX_QUEUE_PER_THREAD 16
+#define MAX_TX_PORT_PER_THREAD  RTE_MAX_ETHPORTS
+#define MAX_TX_QUEUE_PER_PORT   RTE_MAX_ETHPORTS
+#define MAX_RX_QUEUE_PER_PORT   128
+
+#define MAX_RX_THREAD 1024
+#define MAX_TX_THREAD 1024
+#define MAX_THREAD    (MAX_RX_THREAD + MAX_TX_THREAD)
+
+/**
+ * Producers and consumers threads configuration
+ */
+static int lthreads_on = 1; /**< Use lthreads for processing*/
+
+rte_atomic16_t rx_counter;  /**< Number of spawned rx threads */
+rte_atomic16_t tx_counter;  /**< Number of spawned tx threads */
+
+struct thread_conf {
+	uint16_t lcore_id;      /**< Initial lcore for rx thread */
+	uint16_t cpu_id;        /**< Cpu id for cpu load stats counter */
+	uint16_t thread_id;     /**< Thread ID */
+
+#if (APP_CPU_LOAD > 0)
+	int busy[MAX_CPU_COUNTER];
+#endif
+};
+
+struct thread_rx_conf {
+	struct thread_conf conf;
+
+	uint16_t n_rx_queue;
+	struct lcore_rx_queue rx_queue_list[MAX_RX_QUEUE_PER_LCORE];
+
+	uint16_t n_ring;        /**< Number of output rings */
+	struct rte_ring *ring[RTE_MAX_LCORE];
+	struct lthread_cond *ready[RTE_MAX_LCORE];
+
+#if (APP_CPU_LOAD > 0)
+	int busy[MAX_CPU_COUNTER];
+#endif
+} __rte_cache_aligned;
+
+uint16_t n_rx_thread;
+struct thread_rx_conf rx_thread[MAX_RX_THREAD];
+
+struct thread_tx_conf {
+	struct thread_conf conf;
+
+	uint16_t tx_queue_id[RTE_MAX_LCORE];
+	struct mbuf_table tx_mbufs[RTE_MAX_LCORE];
+
+	struct rte_ring *ring;
+	struct lthread_cond **ready;
+
+} __rte_cache_aligned;
+
+uint16_t n_tx_thread;
+struct thread_tx_conf tx_thread[MAX_TX_THREAD];
+
+/* Send burst of packets on an output interface */
+static inline int
+send_burst(struct thread_tx_conf *qconf, uint16_t n, uint8_t port)
+{
+	struct rte_mbuf **m_table;
+	int ret;
+	uint16_t queueid;
+
+	queueid = qconf->tx_queue_id[port];
+	m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
+
+	ret = rte_eth_tx_burst(port, queueid, m_table, n);
+	if (unlikely(ret < n)) {
+		do {
+			rte_pktmbuf_free(m_table[ret]);
+		} while (++ret < n);
+	}
+
+	return 0;
+}
+
+/* Enqueue a single packet, and send burst if queue is filled */
+static inline int
+send_single_packet(struct rte_mbuf *m, uint8_t port)
+{
+	uint16_t len;
+	struct thread_tx_conf *qconf;
+
+	if (lthreads_on)
+		qconf = (struct thread_tx_conf *)lthread_get_data();
+	else
+		qconf = (struct thread_tx_conf *)RTE_PER_LCORE(lcore_conf)->data;
+
+	len = qconf->tx_mbufs[port].len;
+	qconf->tx_mbufs[port].m_table[len] = m;
+	len++;
+
+	/* enough pkts to be sent */
+	if (unlikely(len == MAX_PKT_BURST)) {
+		send_burst(qconf, MAX_PKT_BURST, port);
+		len = 0;
+	}
+
+	qconf->tx_mbufs[port].len = len;
+	return 0;
+}
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+static inline __attribute__((always_inline)) void
+send_packetsx4(uint8_t port,
+	struct rte_mbuf *m[], uint32_t num)
+{
+	uint32_t len, j, n;
+	struct thread_tx_conf *qconf;
+
+	if (lthreads_on)
+		qconf = (struct thread_tx_conf *)lthread_get_data();
+	else
+		qconf = (struct thread_tx_conf *)RTE_PER_LCORE(lcore_conf)->data;
+
+	len = qconf->tx_mbufs[port].len;
+
+	/*
+	 * If TX buffer for that queue is empty, and we have enough packets,
+	 * then send them straightway.
+	 */
+	if (num >= MAX_TX_BURST && len == 0) {
+		n = rte_eth_tx_burst(port, qconf->tx_queue_id[port], m, num);
+		if (unlikely(n < num)) {
+			do {
+				rte_pktmbuf_free(m[n]);
+			} while (++n < num);
+		}
+		return;
+	}
+
+	/*
+	 * Put packets into TX buffer for that queue.
+	 */
+
+	n = len + num;
+	n = (n > MAX_PKT_BURST) ? MAX_PKT_BURST - len : num;
+
+	j = 0;
+	switch (n % FWDSTEP) {
+	while (j < n) {
+	case 0:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 3:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 2:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 1:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	}
+	}
+
+	len += n;
+
+	/* enough pkts to be sent */
+	if (unlikely(len == MAX_PKT_BURST)) {
+
+		send_burst(qconf, MAX_PKT_BURST, port);
+
+		/* copy rest of the packets into the TX buffer. */
+		len = num - n;
+		j = 0;
+		switch (len % FWDSTEP) {
+		while (j < len) {
+		case 0:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 3:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 2:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 1:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		}
+		}
+	}
+
+	qconf->tx_mbufs[port].len = len;
+}
+#endif /* APP_LOOKUP_LPM */
+
+#ifdef DO_RFC_1812_CHECKS
+static inline int
+is_valid_ipv4_pkt(struct ipv4_hdr *pkt, uint32_t link_len)
+{
+	/* From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2 */
+	/*
+	 * 1. The packet length reported by the Link Layer must be large
+	 * enough to hold the minimum length legal IP datagram (20 bytes).
+	 */
+	if (link_len < sizeof(struct ipv4_hdr))
+		return -1;
+
+	/* 2. The IP checksum must be correct. */
+	/* this is checked in H/W */
+
+	/*
+	 * 3. The IP version number must be 4. If the version number is not 4
+	 * then the packet may be another version of IP, such as IPng or
+	 * ST-II.
+	 */
+	if (((pkt->version_ihl) >> 4) != 4)
+		return -3;
+	/*
+	 * 4. The IP header length field must be large enough to hold the
+	 * minimum length legal IP datagram (20 bytes = 5 words).
+	 */
+	if ((pkt->version_ihl & 0xf) < 5)
+		return -4;
+
+	/*
+	 * 5. The IP total length field must be large enough to hold the IP
+	 * datagram header, whose length is specified in the IP header length
+	 * field.
+	 */
+	if (rte_cpu_to_be_16(pkt->total_length) < sizeof(struct ipv4_hdr))
+		return -5;
+
+	return 0;
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+static __m128i mask0;
+static __m128i mask1;
+static __m128i mask2;
+static inline uint8_t
+get_ipv4_dst_port(void *ipv4_hdr, uint8_t portid,
+		lookup_struct_t *ipv4_l3fwd_lookup_struct)
+{
+	int ret = 0;
+	union ipv4_5tuple_host key;
+
+	ipv4_hdr = (uint8_t *)ipv4_hdr + offsetof(struct ipv4_hdr, time_to_live);
+	__m128i data = _mm_loadu_si128((__m128i *)(ipv4_hdr));
+	/* Get 5 tuple: dst port, src port, dst IP address, src IP address and
+	   protocol */
+	key.xmm = _mm_and_si128(data, mask0);
+	/* Find destination port */
+	ret = rte_hash_lookup(ipv4_l3fwd_lookup_struct, (const void *)&key);
+	return (uint8_t)((ret < 0) ? portid : ipv4_l3fwd_out_if[ret]);
+}
+
+static inline uint8_t
+get_ipv6_dst_port(void *ipv6_hdr, uint8_t portid,
+		lookup_struct_t *ipv6_l3fwd_lookup_struct)
+{
+	int ret = 0;
+	union ipv6_5tuple_host key;
+
+	ipv6_hdr = (uint8_t *)ipv6_hdr + offsetof(struct ipv6_hdr, payload_len);
+	__m128i data0 = _mm_loadu_si128((__m128i *)(ipv6_hdr));
+	__m128i data1 = _mm_loadu_si128((__m128i *)(((uint8_t *)ipv6_hdr) +
+			sizeof(__m128i)));
+	__m128i data2 = _mm_loadu_si128((__m128i *)(((uint8_t *)ipv6_hdr) +
+			sizeof(__m128i) + sizeof(__m128i)));
+	/* Get part of 5 tuple: src IP address lower 96 bits and protocol */
+	key.xmm[0] = _mm_and_si128(data0, mask1);
+	/* Get part of 5 tuple: dst IP address lower 96 bits and src IP address
+	   higher 32 bits */
+	key.xmm[1] = data1;
+	/* Get part of 5 tuple: dst port and src port and dst IP address higher
+	   32 bits */
+	key.xmm[2] = _mm_and_si128(data2, mask2);
+
+	/* Find destination port */
+	ret = rte_hash_lookup(ipv6_l3fwd_lookup_struct, (const void *)&key);
+	return (uint8_t)((ret < 0) ? portid : ipv6_l3fwd_out_if[ret]);
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+
+static inline uint8_t
+get_ipv4_dst_port(void *ipv4_hdr, uint8_t portid,
+		lookup_struct_t *ipv4_l3fwd_lookup_struct)
+{
+	uint32_t next_hop;
+
+	return (uint8_t)((rte_lpm_lookup(ipv4_l3fwd_lookup_struct,
+		rte_be_to_cpu_32(((struct ipv4_hdr *)ipv4_hdr)->dst_addr),
+		&next_hop) == 0) ? next_hop : portid);
+}
+
+static inline uint8_t
+get_ipv6_dst_port(void *ipv6_hdr,  uint8_t portid,
+		lookup6_struct_t *ipv6_l3fwd_lookup_struct)
+{
+	uint32_t next_hop;
+
+	return (uint8_t) ((rte_lpm6_lookup(ipv6_l3fwd_lookup_struct,
+			((struct ipv6_hdr *)ipv6_hdr)->dst_addr, &next_hop) == 0) ?
+			next_hop : portid);
+}
+#endif
+
+static inline void l3fwd_simple_forward(struct rte_mbuf *m, uint8_t portid)
+		__attribute__((unused));
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+
+#define MASK_ALL_PKTS   0xff
+#define EXCLUDE_1ST_PKT 0xfe
+#define EXCLUDE_2ND_PKT 0xfd
+#define EXCLUDE_3RD_PKT 0xfb
+#define EXCLUDE_4TH_PKT 0xf7
+#define EXCLUDE_5TH_PKT 0xef
+#define EXCLUDE_6TH_PKT 0xdf
+#define EXCLUDE_7TH_PKT 0xbf
+#define EXCLUDE_8TH_PKT 0x7f
+
+static inline void
+simple_ipv4_fwd_8pkts(struct rte_mbuf *m[8], uint8_t portid)
+{
+	struct ether_hdr *eth_hdr[8];
+	struct ipv4_hdr *ipv4_hdr[8];
+	uint8_t dst_port[8];
+	int32_t ret[8];
+	union ipv4_5tuple_host key[8];
+	__m128i data[8];
+
+	eth_hdr[0] = rte_pktmbuf_mtod(m[0], struct ether_hdr *);
+	eth_hdr[1] = rte_pktmbuf_mtod(m[1], struct ether_hdr *);
+	eth_hdr[2] = rte_pktmbuf_mtod(m[2], struct ether_hdr *);
+	eth_hdr[3] = rte_pktmbuf_mtod(m[3], struct ether_hdr *);
+	eth_hdr[4] = rte_pktmbuf_mtod(m[4], struct ether_hdr *);
+	eth_hdr[5] = rte_pktmbuf_mtod(m[5], struct ether_hdr *);
+	eth_hdr[6] = rte_pktmbuf_mtod(m[6], struct ether_hdr *);
+	eth_hdr[7] = rte_pktmbuf_mtod(m[7], struct ether_hdr *);
+
+	/* Handle IPv4 headers.*/
+	ipv4_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+	ipv4_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct ipv4_hdr *,
+			sizeof(struct ether_hdr));
+
+#ifdef DO_RFC_1812_CHECKS
+	/* Check to make sure the packet is valid (RFC1812) */
+	uint8_t valid_mask = MASK_ALL_PKTS;
+
+	if (is_valid_ipv4_pkt(ipv4_hdr[0], m[0]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[0]);
+		valid_mask &= EXCLUDE_1ST_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[1], m[1]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[1]);
+		valid_mask &= EXCLUDE_2ND_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[2], m[2]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[2]);
+		valid_mask &= EXCLUDE_3RD_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[3], m[3]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[3]);
+		valid_mask &= EXCLUDE_4TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[4], m[4]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[4]);
+		valid_mask &= EXCLUDE_5TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[5], m[5]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[5]);
+		valid_mask &= EXCLUDE_6TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[6], m[6]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[6]);
+		valid_mask &= EXCLUDE_7TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[7], m[7]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[7]);
+		valid_mask &= EXCLUDE_8TH_PKT;
+	}
+	if (unlikely(valid_mask != MASK_ALL_PKTS)) {
+		if (valid_mask == 0)
+			return;
+
+		uint8_t i = 0;
+
+		for (i = 0; i < 8; i++)
+			if ((0x1 << i) & valid_mask)
+				l3fwd_simple_forward(m[i], portid);
+	}
+#endif /* End of #ifdef DO_RFC_1812_CHECKS */
+
+	data[0] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[0], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[1] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[1], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[2] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[2], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[3] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[3], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[4] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[4], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[5] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[5], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[6] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[6], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+	data[7] = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m[7], __m128i *,
+			sizeof(struct ether_hdr) +
+			offsetof(struct ipv4_hdr, time_to_live)));
+
+	key[0].xmm = _mm_and_si128(data[0], mask0);
+	key[1].xmm = _mm_and_si128(data[1], mask0);
+	key[2].xmm = _mm_and_si128(data[2], mask0);
+	key[3].xmm = _mm_and_si128(data[3], mask0);
+	key[4].xmm = _mm_and_si128(data[4], mask0);
+	key[5].xmm = _mm_and_si128(data[5], mask0);
+	key[6].xmm = _mm_and_si128(data[6], mask0);
+	key[7].xmm = _mm_and_si128(data[7], mask0);
+
+	const void *key_array[8] = {&key[0], &key[1], &key[2], &key[3],
+			&key[4], &key[5], &key[6], &key[7]};
+
+	rte_hash_lookup_bulk(RTE_PER_LCORE(lcore_conf)->ipv4_lookup_struct,
+			&key_array[0], 8, ret);
+	dst_port[0] = (uint8_t) ((ret[0] < 0) ? portid : ipv4_l3fwd_out_if[ret[0]]);
+	dst_port[1] = (uint8_t) ((ret[1] < 0) ? portid : ipv4_l3fwd_out_if[ret[1]]);
+	dst_port[2] = (uint8_t) ((ret[2] < 0) ? portid : ipv4_l3fwd_out_if[ret[2]]);
+	dst_port[3] = (uint8_t) ((ret[3] < 0) ? portid : ipv4_l3fwd_out_if[ret[3]]);
+	dst_port[4] = (uint8_t) ((ret[4] < 0) ? portid : ipv4_l3fwd_out_if[ret[4]]);
+	dst_port[5] = (uint8_t) ((ret[5] < 0) ? portid : ipv4_l3fwd_out_if[ret[5]]);
+	dst_port[6] = (uint8_t) ((ret[6] < 0) ? portid : ipv4_l3fwd_out_if[ret[6]]);
+	dst_port[7] = (uint8_t) ((ret[7] < 0) ? portid : ipv4_l3fwd_out_if[ret[7]]);
+
+	if (dst_port[0] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[0]) == 0)
+		dst_port[0] = portid;
+	if (dst_port[1] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[1]) == 0)
+		dst_port[1] = portid;
+	if (dst_port[2] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[2]) == 0)
+		dst_port[2] = portid;
+	if (dst_port[3] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[3]) == 0)
+		dst_port[3] = portid;
+	if (dst_port[4] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[4]) == 0)
+		dst_port[4] = portid;
+	if (dst_port[5] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[5]) == 0)
+		dst_port[5] = portid;
+	if (dst_port[6] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[6]) == 0)
+		dst_port[6] = portid;
+	if (dst_port[7] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[7]) == 0)
+		dst_port[7] = portid;
+
+#ifdef DO_RFC_1812_CHECKS
+	/* Update time to live and header checksum */
+	--(ipv4_hdr[0]->time_to_live);
+	--(ipv4_hdr[1]->time_to_live);
+	--(ipv4_hdr[2]->time_to_live);
+	--(ipv4_hdr[3]->time_to_live);
+	++(ipv4_hdr[0]->hdr_checksum);
+	++(ipv4_hdr[1]->hdr_checksum);
+	++(ipv4_hdr[2]->hdr_checksum);
+	++(ipv4_hdr[3]->hdr_checksum);
+	--(ipv4_hdr[4]->time_to_live);
+	--(ipv4_hdr[5]->time_to_live);
+	--(ipv4_hdr[6]->time_to_live);
+	--(ipv4_hdr[7]->time_to_live);
+	++(ipv4_hdr[4]->hdr_checksum);
+	++(ipv4_hdr[5]->hdr_checksum);
+	++(ipv4_hdr[6]->hdr_checksum);
+	++(ipv4_hdr[7]->hdr_checksum);
+#endif
+
+	/* dst addr */
+	*(uint64_t *)&eth_hdr[0]->d_addr = dest_eth_addr[dst_port[0]];
+	*(uint64_t *)&eth_hdr[1]->d_addr = dest_eth_addr[dst_port[1]];
+	*(uint64_t *)&eth_hdr[2]->d_addr = dest_eth_addr[dst_port[2]];
+	*(uint64_t *)&eth_hdr[3]->d_addr = dest_eth_addr[dst_port[3]];
+	*(uint64_t *)&eth_hdr[4]->d_addr = dest_eth_addr[dst_port[4]];
+	*(uint64_t *)&eth_hdr[5]->d_addr = dest_eth_addr[dst_port[5]];
+	*(uint64_t *)&eth_hdr[6]->d_addr = dest_eth_addr[dst_port[6]];
+	*(uint64_t *)&eth_hdr[7]->d_addr = dest_eth_addr[dst_port[7]];
+
+	/* src addr */
+	ether_addr_copy(&ports_eth_addr[dst_port[0]], &eth_hdr[0]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[1]], &eth_hdr[1]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[2]], &eth_hdr[2]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[3]], &eth_hdr[3]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[4]], &eth_hdr[4]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[5]], &eth_hdr[5]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[6]], &eth_hdr[6]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[7]], &eth_hdr[7]->s_addr);
+
+	send_single_packet(m[0], (uint8_t)dst_port[0]);
+	send_single_packet(m[1], (uint8_t)dst_port[1]);
+	send_single_packet(m[2], (uint8_t)dst_port[2]);
+	send_single_packet(m[3], (uint8_t)dst_port[3]);
+	send_single_packet(m[4], (uint8_t)dst_port[4]);
+	send_single_packet(m[5], (uint8_t)dst_port[5]);
+	send_single_packet(m[6], (uint8_t)dst_port[6]);
+	send_single_packet(m[7], (uint8_t)dst_port[7]);
+
+}
+
+static inline void get_ipv6_5tuple(struct rte_mbuf *m0, __m128i mask0,
+		__m128i mask1, union ipv6_5tuple_host *key)
+{
+	__m128i tmpdata0 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0,
+			__m128i *, sizeof(struct ether_hdr) +
+			offsetof(struct ipv6_hdr, payload_len)));
+	__m128i tmpdata1 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0,
+			__m128i *, sizeof(struct ether_hdr) +
+			offsetof(struct ipv6_hdr, payload_len) + sizeof(__m128i)));
+	__m128i tmpdata2 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0,
+			__m128i *, sizeof(struct ether_hdr) +
+			offsetof(struct ipv6_hdr, payload_len) + sizeof(__m128i) +
+			sizeof(__m128i)));
+	key->xmm[0] = _mm_and_si128(tmpdata0, mask0);
+	key->xmm[1] = tmpdata1;
+	key->xmm[2] = _mm_and_si128(tmpdata2, mask1);
+}
+
+static inline void
+simple_ipv6_fwd_8pkts(struct rte_mbuf *m[8], uint8_t portid)
+{
+	int32_t ret[8];
+	uint8_t dst_port[8];
+	struct ether_hdr *eth_hdr[8];
+	union ipv6_5tuple_host key[8];
+
+	__attribute__((unused)) struct ipv6_hdr *ipv6_hdr[8];
+
+	eth_hdr[0] = rte_pktmbuf_mtod(m[0], struct ether_hdr *);
+	eth_hdr[1] = rte_pktmbuf_mtod(m[1], struct ether_hdr *);
+	eth_hdr[2] = rte_pktmbuf_mtod(m[2], struct ether_hdr *);
+	eth_hdr[3] = rte_pktmbuf_mtod(m[3], struct ether_hdr *);
+	eth_hdr[4] = rte_pktmbuf_mtod(m[4], struct ether_hdr *);
+	eth_hdr[5] = rte_pktmbuf_mtod(m[5], struct ether_hdr *);
+	eth_hdr[6] = rte_pktmbuf_mtod(m[6], struct ether_hdr *);
+	eth_hdr[7] = rte_pktmbuf_mtod(m[7], struct ether_hdr *);
+
+	/* Handle IPv6 headers.*/
+	ipv6_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+	ipv6_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct ipv6_hdr *,
+			sizeof(struct ether_hdr));
+
+	get_ipv6_5tuple(m[0], mask1, mask2, &key[0]);
+	get_ipv6_5tuple(m[1], mask1, mask2, &key[1]);
+	get_ipv6_5tuple(m[2], mask1, mask2, &key[2]);
+	get_ipv6_5tuple(m[3], mask1, mask2, &key[3]);
+	get_ipv6_5tuple(m[4], mask1, mask2, &key[4]);
+	get_ipv6_5tuple(m[5], mask1, mask2, &key[5]);
+	get_ipv6_5tuple(m[6], mask1, mask2, &key[6]);
+	get_ipv6_5tuple(m[7], mask1, mask2, &key[7]);
+
+	const void *key_array[8] = {&key[0], &key[1], &key[2], &key[3],
+			&key[4], &key[5], &key[6], &key[7]};
+
+	rte_hash_lookup_bulk(RTE_PER_LCORE(lcore_conf)->ipv6_lookup_struct,
+			&key_array[0], 4, ret);
+	dst_port[0] = (uint8_t) ((ret[0] < 0) ? portid : ipv6_l3fwd_out_if[ret[0]]);
+	dst_port[1] = (uint8_t) ((ret[1] < 0) ? portid : ipv6_l3fwd_out_if[ret[1]]);
+	dst_port[2] = (uint8_t) ((ret[2] < 0) ? portid : ipv6_l3fwd_out_if[ret[2]]);
+	dst_port[3] = (uint8_t) ((ret[3] < 0) ? portid : ipv6_l3fwd_out_if[ret[3]]);
+	dst_port[4] = (uint8_t) ((ret[4] < 0) ? portid : ipv6_l3fwd_out_if[ret[4]]);
+	dst_port[5] = (uint8_t) ((ret[5] < 0) ? portid : ipv6_l3fwd_out_if[ret[5]]);
+	dst_port[6] = (uint8_t) ((ret[6] < 0) ? portid : ipv6_l3fwd_out_if[ret[6]]);
+	dst_port[7] = (uint8_t) ((ret[7] < 0) ? portid : ipv6_l3fwd_out_if[ret[7]]);
+
+	if (dst_port[0] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[0]) == 0)
+		dst_port[0] = portid;
+	if (dst_port[1] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[1]) == 0)
+		dst_port[1] = portid;
+	if (dst_port[2] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[2]) == 0)
+		dst_port[2] = portid;
+	if (dst_port[3] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[3]) == 0)
+		dst_port[3] = portid;
+	if (dst_port[4] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[4]) == 0)
+		dst_port[4] = portid;
+	if (dst_port[5] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[5]) == 0)
+		dst_port[5] = portid;
+	if (dst_port[6] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[6]) == 0)
+		dst_port[6] = portid;
+	if (dst_port[7] >= RTE_MAX_ETHPORTS ||
+			(enabled_port_mask & 1 << dst_port[7]) == 0)
+		dst_port[7] = portid;
+
+	/* dst addr */
+	*(uint64_t *)&eth_hdr[0]->d_addr = dest_eth_addr[dst_port[0]];
+	*(uint64_t *)&eth_hdr[1]->d_addr = dest_eth_addr[dst_port[1]];
+	*(uint64_t *)&eth_hdr[2]->d_addr = dest_eth_addr[dst_port[2]];
+	*(uint64_t *)&eth_hdr[3]->d_addr = dest_eth_addr[dst_port[3]];
+	*(uint64_t *)&eth_hdr[4]->d_addr = dest_eth_addr[dst_port[4]];
+	*(uint64_t *)&eth_hdr[5]->d_addr = dest_eth_addr[dst_port[5]];
+	*(uint64_t *)&eth_hdr[6]->d_addr = dest_eth_addr[dst_port[6]];
+	*(uint64_t *)&eth_hdr[7]->d_addr = dest_eth_addr[dst_port[7]];
+
+	/* src addr */
+	ether_addr_copy(&ports_eth_addr[dst_port[0]], &eth_hdr[0]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[1]], &eth_hdr[1]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[2]], &eth_hdr[2]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[3]], &eth_hdr[3]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[4]], &eth_hdr[4]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[5]], &eth_hdr[5]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[6]], &eth_hdr[6]->s_addr);
+	ether_addr_copy(&ports_eth_addr[dst_port[7]], &eth_hdr[7]->s_addr);
+
+	send_single_packet(m[0], (uint8_t)dst_port[0]);
+	send_single_packet(m[1], (uint8_t)dst_port[1]);
+	send_single_packet(m[2], (uint8_t)dst_port[2]);
+	send_single_packet(m[3], (uint8_t)dst_port[3]);
+	send_single_packet(m[4], (uint8_t)dst_port[4]);
+	send_single_packet(m[5], (uint8_t)dst_port[5]);
+	send_single_packet(m[6], (uint8_t)dst_port[6]);
+	send_single_packet(m[7], (uint8_t)dst_port[7]);
+
+}
+#endif /* APP_LOOKUP_METHOD */
+
+static inline __attribute__((always_inline)) void
+l3fwd_simple_forward(struct rte_mbuf *m, uint8_t portid)
+{
+	struct ether_hdr *eth_hdr;
+	struct ipv4_hdr *ipv4_hdr;
+	uint8_t dst_port;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+	if (RTE_ETH_IS_IPV4_HDR(m->packet_type)) {
+		/* Handle IPv4 headers.*/
+		ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
+				sizeof(struct ether_hdr));
+
+#ifdef DO_RFC_1812_CHECKS
+		/* Check to make sure the packet is valid (RFC1812) */
+		if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
+			rte_pktmbuf_free(m);
+			return;
+		}
+#endif
+
+		 dst_port = get_ipv4_dst_port(ipv4_hdr, portid,
+			RTE_PER_LCORE(lcore_conf)->ipv4_lookup_struct);
+		if (dst_port >= RTE_MAX_ETHPORTS ||
+				(enabled_port_mask & 1 << dst_port) == 0)
+			dst_port = portid;
+
+#ifdef DO_RFC_1812_CHECKS
+		/* Update time to live and header checksum */
+		--(ipv4_hdr->time_to_live);
+		++(ipv4_hdr->hdr_checksum);
+#endif
+		/* dst addr */
+		*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+		/* src addr */
+		ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+		send_single_packet(m, dst_port);
+	} else if (RTE_ETH_IS_IPV6_HDR(m->packet_type)) {
+		/* Handle IPv6 headers.*/
+		struct ipv6_hdr *ipv6_hdr;
+
+		ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+				sizeof(struct ether_hdr));
+
+		dst_port = get_ipv6_dst_port(ipv6_hdr, portid,
+				RTE_PER_LCORE(lcore_conf)->ipv6_lookup_struct);
+
+		if (dst_port >= RTE_MAX_ETHPORTS ||
+				(enabled_port_mask & 1 << dst_port) == 0)
+			dst_port = portid;
+
+		/* dst addr */
+		*(uint64_t *)&eth_hdr->d_addr = dest_eth_addr[dst_port];
+
+		/* src addr */
+		ether_addr_copy(&ports_eth_addr[dst_port], &eth_hdr->s_addr);
+
+		send_single_packet(m, dst_port);
+	} else
+		/* Free the mbuf that contains non-IPV4/IPV6 packet */
+		rte_pktmbuf_free(m);
+}
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+#ifdef DO_RFC_1812_CHECKS
+
+#define	IPV4_MIN_VER_IHL	0x45
+#define	IPV4_MAX_VER_IHL	0x4f
+#define	IPV4_MAX_VER_IHL_DIFF	(IPV4_MAX_VER_IHL - IPV4_MIN_VER_IHL)
+
+/* Minimum value of IPV4 total length (20B) in network byte order. */
+#define	IPV4_MIN_LEN_BE	(sizeof(struct ipv4_hdr) << 8)
+
+/*
+ * From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2:
+ * - The IP version number must be 4.
+ * - The IP header length field must be large enough to hold the
+ *    minimum length legal IP datagram (20 bytes = 5 words).
+ * - The IP total length field must be large enough to hold the IP
+ *   datagram header, whose length is specified in the IP header length
+ *   field.
+ * If we encounter invalid IPV4 packet, then set destination port for it
+ * to BAD_PORT value.
+ */
+static inline __attribute__((always_inline)) void
+rfc1812_process(struct ipv4_hdr *ipv4_hdr, uint16_t *dp, uint32_t ptype)
+{
+	uint8_t ihl;
+
+	if (RTE_ETH_IS_IPV4_HDR(ptype)) {
+		ihl = ipv4_hdr->version_ihl - IPV4_MIN_VER_IHL;
+
+		ipv4_hdr->time_to_live--;
+		ipv4_hdr->hdr_checksum++;
+
+		if (ihl > IPV4_MAX_VER_IHL_DIFF ||
+				((uint8_t)ipv4_hdr->total_length == 0 &&
+				ipv4_hdr->total_length < IPV4_MIN_LEN_BE)) {
+			dp[0] = BAD_PORT;
+		}
+	}
+}
+
+#else
+#define	rfc1812_process(mb, dp, ptype)	do { } while (0)
+#endif /* DO_RFC_1812_CHECKS */
+#endif /* APP_LOOKUP_LPM && ENABLE_MULTI_BUFFER_OPTIMIZE */
+
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+
+static inline __attribute__((always_inline)) uint16_t
+get_dst_port(struct rte_mbuf *pkt, uint32_t dst_ipv4, uint8_t portid)
+{
+	uint32_t next_hop;
+	struct ipv6_hdr *ipv6_hdr;
+	struct ether_hdr *eth_hdr;
+
+	if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {
+		return (uint16_t) ((rte_lpm_lookup(
+				RTE_PER_LCORE(lcore_conf)->ipv4_lookup_struct, dst_ipv4,
+				&next_hop) == 0) ? next_hop : portid);
+
+	} else if (RTE_ETH_IS_IPV6_HDR(pkt->packet_type)) {
+
+		eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+		ipv6_hdr = (struct ipv6_hdr *)(eth_hdr + 1);
+
+		return (uint16_t) ((rte_lpm6_lookup(
+				RTE_PER_LCORE(lcore_conf)->ipv6_lookup_struct,
+				ipv6_hdr->dst_addr, &next_hop) == 0) ?
+				next_hop : portid);
+
+	}
+
+	return portid;
+}
+
+static inline void
+process_packet(struct rte_mbuf *pkt, uint16_t *dst_port, uint8_t portid)
+{
+	struct ether_hdr *eth_hdr;
+	struct ipv4_hdr *ipv4_hdr;
+	uint32_t dst_ipv4;
+	uint16_t dp;
+	__m128i te, ve;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+
+	dst_ipv4 = ipv4_hdr->dst_addr;
+	dst_ipv4 = rte_be_to_cpu_32(dst_ipv4);
+	dp = get_dst_port(pkt, dst_ipv4, portid);
+
+	te = _mm_load_si128((__m128i *)eth_hdr);
+	ve = val_eth[dp];
+
+	dst_port[0] = dp;
+	rfc1812_process(ipv4_hdr, dst_port, pkt->packet_type);
+
+	te =  _mm_blend_epi16(te, ve, MASK_ETH);
+	_mm_store_si128((__m128i *)eth_hdr, te);
+}
+
+/*
+ * Read packet_type and destination IPV4 addresses from 4 mbufs.
+ */
+static inline void
+processx4_step1(struct rte_mbuf *pkt[FWDSTEP],
+		__m128i *dip,
+		uint32_t *ipv4_flag)
+{
+	struct ipv4_hdr *ipv4_hdr;
+	struct ether_hdr *eth_hdr;
+	uint32_t x0, x1, x2, x3;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x0 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[1], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x1 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[1]->packet_type;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[2], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x2 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[2]->packet_type;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[3], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x3 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[3]->packet_type;
+
+	dip[0] = _mm_set_epi32(x3, x2, x1, x0);
+}
+
+/*
+ * Lookup into LPM for destination port.
+ * If lookup fails, use incoming port (portid) as destination port.
+ */
+static inline void
+processx4_step2(__m128i dip,
+		uint32_t ipv4_flag,
+		uint8_t portid,
+		struct rte_mbuf *pkt[FWDSTEP],
+		uint16_t dprt[FWDSTEP])
+{
+	rte_xmm_t dst;
+	const __m128i bswap_mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11,
+			4, 5, 6, 7, 0, 1, 2, 3);
+
+	/* Byte swap 4 IPV4 addresses. */
+	dip = _mm_shuffle_epi8(dip, bswap_mask);
+
+	/* if all 4 packets are IPV4. */
+	if (likely(ipv4_flag)) {
+		rte_lpm_lookupx4(RTE_PER_LCORE(lcore_conf)->ipv4_lookup_struct, dip,
+				dst.u32, portid);
+
+		/* get rid of unused upper 16 bit for each dport. */
+		dst.x = _mm_packs_epi32(dst.x, dst.x);
+		*(uint64_t *)dprt = dst.u64[0];
+	} else {
+		dst.x = dip;
+		dprt[0] = get_dst_port(pkt[0], dst.u32[0], portid);
+		dprt[1] = get_dst_port(pkt[1], dst.u32[1], portid);
+		dprt[2] = get_dst_port(pkt[2], dst.u32[2], portid);
+		dprt[3] = get_dst_port(pkt[3], dst.u32[3], portid);
+	}
+}
+
+/*
+ * Update source and destination MAC addresses in the ethernet header.
+ * Perform RFC1812 checks and updates for IPV4 packets.
+ */
+static inline void
+processx4_step3(struct rte_mbuf *pkt[FWDSTEP], uint16_t dst_port[FWDSTEP])
+{
+	__m128i te[FWDSTEP];
+	__m128i ve[FWDSTEP];
+	__m128i *p[FWDSTEP];
+
+	p[0] = rte_pktmbuf_mtod(pkt[0], __m128i *);
+	p[1] = rte_pktmbuf_mtod(pkt[1], __m128i *);
+	p[2] = rte_pktmbuf_mtod(pkt[2], __m128i *);
+	p[3] = rte_pktmbuf_mtod(pkt[3], __m128i *);
+
+	ve[0] = val_eth[dst_port[0]];
+	te[0] = _mm_load_si128(p[0]);
+
+	ve[1] = val_eth[dst_port[1]];
+	te[1] = _mm_load_si128(p[1]);
+
+	ve[2] = val_eth[dst_port[2]];
+	te[2] = _mm_load_si128(p[2]);
+
+	ve[3] = val_eth[dst_port[3]];
+	te[3] = _mm_load_si128(p[3]);
+
+	/* Update first 12 bytes, keep rest bytes intact. */
+	te[0] =  _mm_blend_epi16(te[0], ve[0], MASK_ETH);
+	te[1] =  _mm_blend_epi16(te[1], ve[1], MASK_ETH);
+	te[2] =  _mm_blend_epi16(te[2], ve[2], MASK_ETH);
+	te[3] =  _mm_blend_epi16(te[3], ve[3], MASK_ETH);
+
+	_mm_store_si128(p[0], te[0]);
+	_mm_store_si128(p[1], te[1]);
+	_mm_store_si128(p[2], te[2]);
+	_mm_store_si128(p[3], te[3]);
+
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[0] + 1),
+			&dst_port[0], pkt[0]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[1] + 1),
+			&dst_port[1], pkt[1]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[2] + 1),
+			&dst_port[2], pkt[2]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[3] + 1),
+			&dst_port[3], pkt[3]->packet_type);
+}
+
+/*
+ * We group consecutive packets with the same destionation port into one burst.
+ * To avoid extra latency this is done together with some other packet
+ * processing, but after we made a final decision about packet's destination.
+ * To do this we maintain:
+ * pnum - array of number of consecutive packets with the same dest port for
+ * each packet in the input burst.
+ * lp - pointer to the last updated element in the pnum.
+ * dlp - dest port value lp corresponds to.
+ */
+
+#define	GRPSZ	(1 << FWDSTEP)
+#define	GRPMSK	(GRPSZ - 1)
+
+#define GROUP_PORT_STEP(dlp, dcp, lp, pn, idx)	do { \
+	if (likely((dlp) == (dcp)[(idx)])) {         \
+		(lp)[0]++;                           \
+	} else {                                     \
+		(dlp) = (dcp)[idx];                  \
+		(lp) = (pn) + (idx);                 \
+		(lp)[0] = 1;                         \
+	}                                            \
+} while (0)
+
+/*
+ * Group consecutive packets with the same destination port in bursts of 4.
+ * Suppose we have array of destionation ports:
+ * dst_port[] = {a, b, c, d,, e, ... }
+ * dp1 should contain: <a, b, c, d>, dp2: <b, c, d, e>.
+ * We doing 4 comparisions at once and the result is 4 bit mask.
+ * This mask is used as an index into prebuild array of pnum values.
+ */
+static inline uint16_t *
+port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, __m128i dp1, __m128i dp2)
+{
+	static const struct {
+		uint64_t pnum; /* prebuild 4 values for pnum[]. */
+		int32_t  idx;  /* index for new last updated elemnet. */
+		uint16_t lpv;  /* add value to the last updated element. */
+	} gptbl[GRPSZ] = {
+	{
+		/* 0: a != b, b != c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100010001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 1: a == b, b != c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100010002),
+		.idx = 4,
+		.lpv = 1,
+	},
+	{
+		/* 2: a != b, b == c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100020001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 3: a == b, b == c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100020003),
+		.idx = 4,
+		.lpv = 2,
+	},
+	{
+		/* 4: a != b, b != c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200010001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 5: a == b, b != c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200010002),
+		.idx = 4,
+		.lpv = 1,
+	},
+	{
+		/* 6: a != b, b == c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200030001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 7: a == b, b == c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200030004),
+		.idx = 4,
+		.lpv = 3,
+	},
+	{
+		/* 8: a != b, b != c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100010001),
+		.idx = 3,
+		.lpv = 0,
+	},
+	{
+		/* 9: a == b, b != c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100010002),
+		.idx = 3,
+		.lpv = 1,
+	},
+	{
+		/* 0xa: a != b, b == c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100020001),
+		.idx = 3,
+		.lpv = 0,
+	},
+	{
+		/* 0xb: a == b, b == c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100020003),
+		.idx = 3,
+		.lpv = 2,
+	},
+	{
+		/* 0xc: a != b, b != c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300010001),
+		.idx = 2,
+		.lpv = 0,
+	},
+	{
+		/* 0xd: a == b, b != c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300010002),
+		.idx = 2,
+		.lpv = 1,
+	},
+	{
+		/* 0xe: a != b, b == c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300040001),
+		.idx = 1,
+		.lpv = 0,
+	},
+	{
+		/* 0xf: a == b, b == c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300040005),
+		.idx = 0,
+		.lpv = 4,
+	},
+	};
+
+	union {
+		uint16_t u16[FWDSTEP + 1];
+		uint64_t u64;
+	} *pnum = (void *)pn;
+
+	int32_t v;
+
+	dp1 = _mm_cmpeq_epi16(dp1, dp2);
+	dp1 = _mm_unpacklo_epi16(dp1, dp1);
+	v = _mm_movemask_ps((__m128)dp1);
+
+	/* update last port counter. */
+	lp[0] += gptbl[v].lpv;
+
+	/* if dest port value has changed. */
+	if (v != GRPMSK) {
+		pnum->u64 = gptbl[v].pnum;
+		pnum->u16[FWDSTEP] = 1;
+		lp = pnum->u16 + gptbl[v].idx;
+	}
+
+	return lp;
+}
+
+#endif /* APP_LOOKUP_METHOD */
+
+static void
+process_burst(struct rte_mbuf *pkts_burst[MAX_PKT_BURST], int nb_rx,
+		uint8_t portid) {
+
+	int j;
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+	int32_t k;
+	uint16_t dlp;
+	uint16_t *lp;
+	uint16_t dst_port[MAX_PKT_BURST];
+	__m128i dip[MAX_PKT_BURST / FWDSTEP];
+	uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP];
+	uint16_t pnum[MAX_PKT_BURST + 1];
+#endif
+
+
+#if (ENABLE_MULTI_BUFFER_OPTIMIZE == 1)
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+	{
+		/*
+		 * Send nb_rx - nb_rx%8 packets
+		 * in groups of 8.
+		 */
+		int32_t n = RTE_ALIGN_FLOOR(nb_rx, 8);
+
+		for (j = 0; j < n; j += 8) {
+			uint32_t pkt_type =
+				pkts_burst[j]->packet_type &
+				pkts_burst[j+1]->packet_type &
+				pkts_burst[j+2]->packet_type &
+				pkts_burst[j+3]->packet_type &
+				pkts_burst[j+4]->packet_type &
+				pkts_burst[j+5]->packet_type &
+				pkts_burst[j+6]->packet_type &
+				pkts_burst[j+7]->packet_type;
+			if (pkt_type & RTE_PTYPE_L3_IPV4) {
+				simple_ipv4_fwd_8pkts(&pkts_burst[j], portid);
+			} else if (pkt_type &
+				RTE_PTYPE_L3_IPV6) {
+				simple_ipv6_fwd_8pkts(&pkts_burst[j], portid);
+			} else {
+				l3fwd_simple_forward(pkts_burst[j], portid);
+				l3fwd_simple_forward(pkts_burst[j+1], portid);
+				l3fwd_simple_forward(pkts_burst[j+2], portid);
+				l3fwd_simple_forward(pkts_burst[j+3], portid);
+				l3fwd_simple_forward(pkts_burst[j+4], portid);
+				l3fwd_simple_forward(pkts_burst[j+5], portid);
+				l3fwd_simple_forward(pkts_burst[j+6], portid);
+				l3fwd_simple_forward(pkts_burst[j+7], portid);
+			}
+		}
+		for (; j < nb_rx ; j++)
+			l3fwd_simple_forward(pkts_burst[j], portid);
+	}
+#elif (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+
+	k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+	for (j = 0; j != k; j += FWDSTEP)
+		processx4_step1(&pkts_burst[j], &dip[j / FWDSTEP],
+				&ipv4_flag[j / FWDSTEP]);
+
+	k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+	for (j = 0; j != k; j += FWDSTEP)
+		processx4_step2(dip[j / FWDSTEP], ipv4_flag[j / FWDSTEP],
+				portid, &pkts_burst[j], &dst_port[j]);
+
+	/*
+	 * Finish packet processing and group consecutive
+	 * packets with the same destination port.
+	 */
+	k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+	if (k != 0) {
+		__m128i dp1, dp2;
+
+		lp = pnum;
+		lp[0] = 1;
+
+		processx4_step3(pkts_burst, dst_port);
+
+		/* dp1: <d[0], d[1], d[2], d[3], ... > */
+		dp1 = _mm_loadu_si128((__m128i *)dst_port);
+
+		for (j = FWDSTEP; j != k; j += FWDSTEP) {
+			processx4_step3(&pkts_burst[j], &dst_port[j]);
+
+			/*
+			 * dp2:
+			 * <d[j-3], d[j-2], d[j-1], d[j], ... >
+			 */
+			dp2 = _mm_loadu_si128(
+					(__m128i *)&dst_port[j - FWDSTEP + 1]);
+			lp  = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
+
+			/*
+			 * dp1:
+			 * <d[j], d[j+1], d[j+2], d[j+3], ... >
+			 */
+			dp1 = _mm_srli_si128(dp2, (FWDSTEP - 1) *
+					sizeof(dst_port[0]));
+		}
+
+		/*
+		 * dp2: <d[j-3], d[j-2], d[j-1], d[j-1], ... >
+		 */
+		dp2 = _mm_shufflelo_epi16(dp1, 0xf9);
+		lp  = port_groupx4(&pnum[j - FWDSTEP], lp, dp1, dp2);
+
+		/*
+		 * remove values added by the last repeated
+		 * dst port.
+		 */
+		lp[0]--;
+		dlp = dst_port[j - 1];
+	} else {
+		/* set dlp and lp to the never used values. */
+		dlp = BAD_PORT - 1;
+		lp = pnum + MAX_PKT_BURST;
+	}
+
+	/* Process up to last 3 packets one by one. */
+	switch (nb_rx % FWDSTEP) {
+	case 3:
+		process_packet(pkts_burst[j], dst_port + j, portid);
+		GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+		j++;
+	case 2:
+		process_packet(pkts_burst[j], dst_port + j, portid);
+		GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+		j++;
+	case 1:
+		process_packet(pkts_burst[j], dst_port + j, portid);
+		GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+		j++;
+	}
+
+	/*
+	 * Send packets out, through destination port.
+	 * Consecuteve pacekts with the same destination port
+	 * are already grouped together.
+	 * If destination port for the packet equals BAD_PORT,
+	 * then free the packet without sending it out.
+	 */
+	for (j = 0; j < nb_rx; j += k) {
+
+		int32_t m;
+		uint16_t pn;
+
+		pn = dst_port[j];
+		k = pnum[j];
+
+		if (likely(pn != BAD_PORT))
+			send_packetsx4(pn, pkts_burst + j, k);
+		else
+			for (m = j; m != j + k; m++)
+				rte_pktmbuf_free(pkts_burst[m]);
+
+	}
+
+#endif /* APP_LOOKUP_METHOD */
+#else /* ENABLE_MULTI_BUFFER_OPTIMIZE == 0 */
+
+	/* Prefetch first packets */
+	for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++)
+		rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[j], void *));
+
+	/* Prefetch and forward already prefetched packets */
+	for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
+		rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
+				j + PREFETCH_OFFSET], void *));
+		l3fwd_simple_forward(pkts_burst[j], portid);
+	}
+
+	/* Forward remaining prefetched packets */
+	for (; j < nb_rx; j++)
+		l3fwd_simple_forward(pkts_burst[j], portid);
+
+#endif /* ENABLE_MULTI_BUFFER_OPTIMIZE */
+
+}
+
+#if (APP_CPU_LOAD > 0)
+
+/*
+ * CPU-load stats collector
+ */
+static int
+cpu_load_collector(__rte_unused void *arg) {
+	unsigned i, j, k;
+	uint64_t hits;
+	uint64_t prev_tsc, diff_tsc, cur_tsc;
+	uint64_t total[MAX_CPU] = { 0 };
+	unsigned min_cpu = MAX_CPU;
+	unsigned max_cpu = 0;
+	unsigned cpu_id;
+	int busy_total = 0;
+	int busy_flag = 0;
+
+	unsigned int n_thread_per_cpu[MAX_CPU] = { 0 };
+	struct thread_conf *thread_per_cpu[MAX_CPU][MAX_THREAD];
+
+	struct thread_conf *thread_conf;
+
+	const uint64_t interval_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
+		US_PER_S * CPU_LOAD_TIMEOUT_US;
+
+	prev_tsc = 0;
+	/*
+	 * Wait for all threads
+	 */
+
+	printf("Waiting for %d rx threads and %d tx threads\n", n_rx_thread,
+			n_tx_thread);
+
+	while (rte_atomic16_read(&rx_counter) < n_rx_thread)
+		rte_pause();
+
+	while (rte_atomic16_read(&tx_counter) < n_tx_thread)
+		rte_pause();
+
+	for (i = 0; i < n_rx_thread; i++) {
+
+		thread_conf = &rx_thread[i].conf;
+		cpu_id = thread_conf->cpu_id;
+		thread_per_cpu[cpu_id][n_thread_per_cpu[cpu_id]++] = thread_conf;
+
+		if (cpu_id > max_cpu)
+			max_cpu = cpu_id;
+		if (cpu_id < min_cpu)
+			min_cpu = cpu_id;
+	}
+	for (i = 0; i < n_tx_thread; i++) {
+
+		thread_conf = &tx_thread[i].conf;
+		cpu_id = thread_conf->cpu_id;
+		thread_per_cpu[cpu_id][n_thread_per_cpu[cpu_id]++] = thread_conf;
+
+		if (thread_conf->cpu_id > max_cpu)
+			max_cpu = thread_conf->cpu_id;
+		if (thread_conf->cpu_id < min_cpu)
+			min_cpu = thread_conf->cpu_id;
+	}
+
+	while (1) {
+
+		cpu_load.counter++;
+		for (i = min_cpu; i <= max_cpu; i++) {
+			for (j = 0; j < MAX_CPU_COUNTER; j++) {
+				for (k = 0; k < n_thread_per_cpu[i]; k++)
+					if (thread_per_cpu[i][k]->busy[j]) {
+						busy_flag = 1;
+						break;
+					}
+				if (busy_flag) {
+					cpu_load.hits[j][i]++;
+					busy_total = 1;
+					busy_flag = 0;
+				}
+			}
+
+			if (busy_total) {
+				total[i]++;
+				busy_total = 0;
+			}
+		}
+
+		cur_tsc = rte_rdtsc();
+
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > interval_tsc)) {
+
+			printf("\033c");
+
+			printf("Cpu usage for %d rx threads and %d tx threads:\n\n",
+					n_rx_thread, n_tx_thread);
+
+			printf("cpu#     proc%%  poll%%  overhead%%\n\n");
+
+			for (i = min_cpu; i <= max_cpu; i++) {
+				hits = 0;
+				printf("CPU %d:", i);
+				for (j = 0; j < MAX_CPU_COUNTER; j++) {
+					printf("%7" PRIu64 "",
+							cpu_load.hits[j][i] * 100 / cpu_load.counter);
+					hits += cpu_load.hits[j][i];
+					cpu_load.hits[j][i] = 0;
+				}
+				printf("%7" PRIu64 "\n",
+						100 - total[i] * 100 / cpu_load.counter);
+				total[i] = 0;
+			}
+			cpu_load.counter = 0;
+
+			prev_tsc = cur_tsc;
+		}
+
+	}
+}
+#endif /* APP_CPU_LOAD */
+
+/*
+ * Null processing lthread loop
+ *
+ * This loop is used to start empty scheduler on lcore.
+ */
+static void
+lthread_null(__rte_unused void *args)
+{
+	int lcore_id = rte_lcore_id();
+
+	RTE_LOG(INFO, L3FWD, "Starting scheduler on lcore %d.\n", lcore_id);
+	lthread_exit(NULL);
+}
+
+/* main processing loop */
+static void
+lthread_tx_per_ring(void *dummy)
+{
+	int nb_rx;
+	uint8_t portid;
+	struct rte_ring *ring;
+	struct thread_tx_conf *tx_conf;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct lthread_cond *ready;
+
+	tx_conf = (struct thread_tx_conf *)dummy;
+	ring = tx_conf->ring;
+	ready = *tx_conf->ready;
+
+	lthread_set_data((void *)tx_conf);
+
+	/*
+	 * Move this lthread to lcore
+	 */
+	lthread_set_affinity(tx_conf->conf.lcore_id);
+
+	RTE_LOG(INFO, L3FWD, "entering main tx loop on lcore %u\n", rte_lcore_id());
+
+	nb_rx = 0;
+	rte_atomic16_inc(&tx_counter);
+	while (1) {
+
+		/*
+		 * Read packet from ring
+		 */
+		SET_CPU_BUSY(tx_conf, CPU_POLL);
+		nb_rx = rte_ring_sc_dequeue_burst(ring, (void **)pkts_burst,
+				MAX_PKT_BURST, NULL);
+		SET_CPU_IDLE(tx_conf, CPU_POLL);
+
+		if (nb_rx > 0) {
+			SET_CPU_BUSY(tx_conf, CPU_PROCESS);
+			portid = pkts_burst[0]->port;
+			process_burst(pkts_burst, nb_rx, portid);
+			SET_CPU_IDLE(tx_conf, CPU_PROCESS);
+			lthread_yield();
+		} else
+			lthread_cond_wait(ready, 0);
+
+	}
+}
+
+/*
+ * Main tx-lthreads spawner lthread.
+ *
+ * This lthread is used to spawn one new lthread per ring from producers.
+ *
+ */
+static void
+lthread_tx(void *args)
+{
+	struct lthread *lt;
+
+	unsigned lcore_id;
+	uint8_t portid;
+	struct thread_tx_conf *tx_conf;
+
+	tx_conf = (struct thread_tx_conf *)args;
+	lthread_set_data((void *)tx_conf);
+
+	/*
+	 * Move this lthread to the selected lcore
+	 */
+	lthread_set_affinity(tx_conf->conf.lcore_id);
+
+	/*
+	 * Spawn tx readers (one per input ring)
+	 */
+	lthread_create(&lt, tx_conf->conf.lcore_id, lthread_tx_per_ring,
+			(void *)tx_conf);
+
+	lcore_id = rte_lcore_id();
+
+	RTE_LOG(INFO, L3FWD, "Entering Tx main loop on lcore %u\n", lcore_id);
+
+	tx_conf->conf.cpu_id = sched_getcpu();
+	while (1) {
+
+		lthread_sleep(BURST_TX_DRAIN_US * 1000);
+
+		/*
+		 * TX burst queue drain
+		 */
+		for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+			if (tx_conf->tx_mbufs[portid].len == 0)
+				continue;
+			SET_CPU_BUSY(tx_conf, CPU_PROCESS);
+			send_burst(tx_conf, tx_conf->tx_mbufs[portid].len, portid);
+			SET_CPU_IDLE(tx_conf, CPU_PROCESS);
+			tx_conf->tx_mbufs[portid].len = 0;
+		}
+
+	}
+}
+
+static void
+lthread_rx(void *dummy)
+{
+	int ret;
+	uint16_t nb_rx;
+	int i;
+	uint8_t portid, queueid;
+	int worker_id;
+	int len[RTE_MAX_LCORE] = { 0 };
+	int old_len, new_len;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct thread_rx_conf *rx_conf;
+
+	rx_conf = (struct thread_rx_conf *)dummy;
+	lthread_set_data((void *)rx_conf);
+
+	/*
+	 * Move this lthread to lcore
+	 */
+	lthread_set_affinity(rx_conf->conf.lcore_id);
+
+	if (rx_conf->n_rx_queue == 0) {
+		RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", rte_lcore_id());
+		return;
+	}
+
+	RTE_LOG(INFO, L3FWD, "Entering main Rx loop on lcore %u\n", rte_lcore_id());
+
+	for (i = 0; i < rx_conf->n_rx_queue; i++) {
+
+		portid = rx_conf->rx_queue_list[i].port_id;
+		queueid = rx_conf->rx_queue_list[i].queue_id;
+		RTE_LOG(INFO, L3FWD, " -- lcoreid=%u portid=%hhu rxqueueid=%hhu\n",
+				rte_lcore_id(), portid, queueid);
+	}
+
+	/*
+	 * Init all condition variables (one per rx thread)
+	 */
+	for (i = 0; i < rx_conf->n_rx_queue; i++)
+		lthread_cond_init(NULL, &rx_conf->ready[i], NULL);
+
+	worker_id = 0;
+
+	rx_conf->conf.cpu_id = sched_getcpu();
+	rte_atomic16_inc(&rx_counter);
+	while (1) {
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < rx_conf->n_rx_queue; ++i) {
+			portid = rx_conf->rx_queue_list[i].port_id;
+			queueid = rx_conf->rx_queue_list[i].queue_id;
+
+			SET_CPU_BUSY(rx_conf, CPU_POLL);
+			nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
+				MAX_PKT_BURST);
+			SET_CPU_IDLE(rx_conf, CPU_POLL);
+
+			if (nb_rx != 0) {
+				worker_id = (worker_id + 1) % rx_conf->n_ring;
+				old_len = len[worker_id];
+
+				SET_CPU_BUSY(rx_conf, CPU_PROCESS);
+				ret = rte_ring_sp_enqueue_burst(
+						rx_conf->ring[worker_id],
+						(void **) pkts_burst,
+						nb_rx, NULL);
+
+				new_len = old_len + ret;
+
+				if (new_len >= BURST_SIZE) {
+					lthread_cond_signal(rx_conf->ready[worker_id]);
+					new_len = 0;
+				}
+
+				len[worker_id] = new_len;
+
+				if (unlikely(ret < nb_rx)) {
+					uint32_t k;
+
+					for (k = ret; k < nb_rx; k++) {
+						struct rte_mbuf *m = pkts_burst[k];
+
+						rte_pktmbuf_free(m);
+					}
+				}
+				SET_CPU_IDLE(rx_conf, CPU_PROCESS);
+			}
+
+			lthread_yield();
+		}
+	}
+}
+
+/*
+ * Start scheduler with initial lthread on lcore
+ *
+ * This lthread loop spawns all rx and tx lthreads on master lcore
+ */
+
+static void
+lthread_spawner(__rte_unused void *arg) {
+	struct lthread *lt[MAX_THREAD];
+	int i;
+	int n_thread = 0;
+
+	printf("Entering lthread_spawner\n");
+
+	/*
+	 * Create producers (rx threads) on default lcore
+	 */
+	for (i = 0; i < n_rx_thread; i++) {
+		rx_thread[i].conf.thread_id = i;
+		lthread_create(&lt[n_thread], -1, lthread_rx,
+				(void *)&rx_thread[i]);
+		n_thread++;
+	}
+
+	/*
+	 * Wait for all producers. Until some producers can be started on the same
+	 * scheduler as this lthread, yielding is required to let them to run and
+	 * prevent deadlock here.
+	 */
+	while (rte_atomic16_read(&rx_counter) < n_rx_thread)
+		lthread_sleep(100000);
+
+	/*
+	 * Create consumers (tx threads) on default lcore_id
+	 */
+	for (i = 0; i < n_tx_thread; i++) {
+		tx_thread[i].conf.thread_id = i;
+		lthread_create(&lt[n_thread], -1, lthread_tx,
+				(void *)&tx_thread[i]);
+		n_thread++;
+	}
+
+	/*
+	 * Wait for all threads finished
+	 */
+	for (i = 0; i < n_thread; i++)
+		lthread_join(lt[i], NULL);
+
+}
+
+/*
+ * Start master scheduler with initial lthread spawning rx and tx lthreads
+ * (main_lthread_master).
+ */
+static int
+lthread_master_spawner(__rte_unused void *arg) {
+	struct lthread *lt;
+	int lcore_id = rte_lcore_id();
+
+	RTE_PER_LCORE(lcore_conf) = &lcore_conf[lcore_id];
+	lthread_create(&lt, -1, lthread_spawner, NULL);
+	lthread_run();
+
+	return 0;
+}
+
+/*
+ * Start scheduler on lcore.
+ */
+static int
+sched_spawner(__rte_unused void *arg) {
+	struct lthread *lt;
+	int lcore_id = rte_lcore_id();
+
+#if (APP_CPU_LOAD)
+	if (lcore_id == cpu_load_lcore_id) {
+		cpu_load_collector(arg);
+		return 0;
+	}
+#endif /* APP_CPU_LOAD */
+
+	RTE_PER_LCORE(lcore_conf) = &lcore_conf[lcore_id];
+	lthread_create(&lt, -1, lthread_null, NULL);
+	lthread_run();
+
+	return 0;
+}
+
+/* main processing loop */
+static int
+pthread_tx(void *dummy)
+{
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	uint64_t prev_tsc, diff_tsc, cur_tsc;
+	int nb_rx;
+	uint8_t portid;
+	struct thread_tx_conf *tx_conf;
+
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
+		US_PER_S * BURST_TX_DRAIN_US;
+
+	prev_tsc = 0;
+
+	tx_conf = (struct thread_tx_conf *)dummy;
+
+	RTE_LOG(INFO, L3FWD, "Entering main Tx loop on lcore %u\n", rte_lcore_id());
+
+	tx_conf->conf.cpu_id = sched_getcpu();
+	rte_atomic16_inc(&tx_counter);
+	while (1) {
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			/*
+			 * This could be optimized (use queueid instead of
+			 * portid), but it is not called so often
+			 */
+			SET_CPU_BUSY(tx_conf, CPU_PROCESS);
+			for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+				if (tx_conf->tx_mbufs[portid].len == 0)
+					continue;
+				send_burst(tx_conf, tx_conf->tx_mbufs[portid].len, portid);
+				tx_conf->tx_mbufs[portid].len = 0;
+			}
+			SET_CPU_IDLE(tx_conf, CPU_PROCESS);
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from ring
+		 */
+		SET_CPU_BUSY(tx_conf, CPU_POLL);
+		nb_rx = rte_ring_sc_dequeue_burst(tx_conf->ring,
+				(void **)pkts_burst, MAX_PKT_BURST, NULL);
+		SET_CPU_IDLE(tx_conf, CPU_POLL);
+
+		if (unlikely(nb_rx == 0)) {
+			sched_yield();
+			continue;
+		}
+
+		SET_CPU_BUSY(tx_conf, CPU_PROCESS);
+		portid = pkts_burst[0]->port;
+		process_burst(pkts_burst, nb_rx, portid);
+		SET_CPU_IDLE(tx_conf, CPU_PROCESS);
+
+	}
+}
+
+static int
+pthread_rx(void *dummy)
+{
+	int i;
+	int worker_id;
+	uint32_t n;
+	uint32_t nb_rx;
+	unsigned lcore_id;
+	uint8_t portid, queueid;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+
+	struct thread_rx_conf *rx_conf;
+
+	lcore_id = rte_lcore_id();
+	rx_conf = (struct thread_rx_conf *)dummy;
+
+	if (rx_conf->n_rx_queue == 0) {
+		RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id);
+		return 0;
+	}
+
+	RTE_LOG(INFO, L3FWD, "entering main rx loop on lcore %u\n", lcore_id);
+
+	for (i = 0; i < rx_conf->n_rx_queue; i++) {
+
+		portid = rx_conf->rx_queue_list[i].port_id;
+		queueid = rx_conf->rx_queue_list[i].queue_id;
+		RTE_LOG(INFO, L3FWD, " -- lcoreid=%u portid=%hhu rxqueueid=%hhu\n",
+				lcore_id, portid, queueid);
+	}
+
+	worker_id = 0;
+	rx_conf->conf.cpu_id = sched_getcpu();
+	rte_atomic16_inc(&rx_counter);
+	while (1) {
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < rx_conf->n_rx_queue; ++i) {
+			portid = rx_conf->rx_queue_list[i].port_id;
+			queueid = rx_conf->rx_queue_list[i].queue_id;
+
+			SET_CPU_BUSY(rx_conf, CPU_POLL);
+			nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
+				MAX_PKT_BURST);
+			SET_CPU_IDLE(rx_conf, CPU_POLL);
+
+			if (nb_rx == 0) {
+				sched_yield();
+				continue;
+			}
+
+			SET_CPU_BUSY(rx_conf, CPU_PROCESS);
+			worker_id = (worker_id + 1) % rx_conf->n_ring;
+			n = rte_ring_sp_enqueue_burst(rx_conf->ring[worker_id],
+					(void **)pkts_burst, nb_rx, NULL);
+
+			if (unlikely(n != nb_rx)) {
+				uint32_t k;
+
+				for (k = n; k < nb_rx; k++) {
+					struct rte_mbuf *m = pkts_burst[k];
+
+					rte_pktmbuf_free(m);
+				}
+			}
+
+			SET_CPU_IDLE(rx_conf, CPU_PROCESS);
+
+		}
+	}
+}
+
+/*
+ * P-Thread spawner.
+ */
+static int
+pthread_run(__rte_unused void *arg) {
+	int lcore_id = rte_lcore_id();
+	int i;
+
+	for (i = 0; i < n_rx_thread; i++)
+		if (rx_thread[i].conf.lcore_id == lcore_id) {
+			printf("Start rx thread on %d...\n", lcore_id);
+			RTE_PER_LCORE(lcore_conf) = &lcore_conf[lcore_id];
+			RTE_PER_LCORE(lcore_conf)->data = (void *)&rx_thread[i];
+			pthread_rx((void *)&rx_thread[i]);
+			return 0;
+		}
+
+	for (i = 0; i < n_tx_thread; i++)
+		if (tx_thread[i].conf.lcore_id == lcore_id) {
+			printf("Start tx thread on %d...\n", lcore_id);
+			RTE_PER_LCORE(lcore_conf) = &lcore_conf[lcore_id];
+			RTE_PER_LCORE(lcore_conf)->data = (void *)&tx_thread[i];
+			pthread_tx((void *)&tx_thread[i]);
+			return 0;
+		}
+
+#if (APP_CPU_LOAD)
+	if (lcore_id == cpu_load_lcore_id)
+		cpu_load_collector(arg);
+#endif /* APP_CPU_LOAD */
+
+	return 0;
+}
+
+static int
+check_lcore_params(void)
+{
+	uint8_t queue, lcore;
+	uint16_t i;
+	int socketid;
+
+	for (i = 0; i < nb_rx_thread_params; ++i) {
+		queue = rx_thread_params[i].queue_id;
+		if (queue >= MAX_RX_QUEUE_PER_PORT) {
+			printf("invalid queue number: %hhu\n", queue);
+			return -1;
+		}
+		lcore = rx_thread_params[i].lcore_id;
+		if (!rte_lcore_is_enabled(lcore)) {
+			printf("error: lcore %hhu is not enabled in lcore mask\n", lcore);
+			return -1;
+		}
+		socketid = rte_lcore_to_socket_id(lcore);
+		if ((socketid != 0) && (numa_on == 0))
+			printf("warning: lcore %hhu is on socket %d with numa off\n",
+				lcore, socketid);
+	}
+	return 0;
+}
+
+static int
+check_port_config(const unsigned nb_ports)
+{
+	unsigned portid;
+	uint16_t i;
+
+	for (i = 0; i < nb_rx_thread_params; ++i) {
+		portid = rx_thread_params[i].port_id;
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			printf("port %u is not enabled in port mask\n", portid);
+			return -1;
+		}
+		if (portid >= nb_ports) {
+			printf("port %u is not present on the board\n", portid);
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static uint8_t
+get_port_n_rx_queues(const uint8_t port)
+{
+	int queue = -1;
+	uint16_t i;
+
+	for (i = 0; i < nb_rx_thread_params; ++i)
+		if (rx_thread_params[i].port_id == port &&
+				rx_thread_params[i].queue_id > queue)
+			queue = rx_thread_params[i].queue_id;
+
+	return (uint8_t)(++queue);
+}
+
+static int
+init_rx_rings(void)
+{
+	unsigned socket_io;
+	struct thread_rx_conf *rx_conf;
+	struct thread_tx_conf *tx_conf;
+	unsigned rx_thread_id, tx_thread_id;
+	char name[256];
+	struct rte_ring *ring = NULL;
+
+	for (tx_thread_id = 0; tx_thread_id < n_tx_thread; tx_thread_id++) {
+
+		tx_conf = &tx_thread[tx_thread_id];
+
+		printf("Connecting tx-thread %d with rx-thread %d\n", tx_thread_id,
+				tx_conf->conf.thread_id);
+
+		rx_thread_id = tx_conf->conf.thread_id;
+		if (rx_thread_id > n_tx_thread) {
+			printf("connection from tx-thread %u to rx-thread %u fails "
+					"(rx-thread not defined)\n", tx_thread_id, rx_thread_id);
+			return -1;
+		}
+
+		rx_conf = &rx_thread[rx_thread_id];
+		socket_io = rte_lcore_to_socket_id(rx_conf->conf.lcore_id);
+
+		snprintf(name, sizeof(name), "app_ring_s%u_rx%u_tx%u",
+				socket_io, rx_thread_id, tx_thread_id);
+
+		ring = rte_ring_create(name, 1024 * 4, socket_io,
+				RING_F_SP_ENQ | RING_F_SC_DEQ);
+
+		if (ring == NULL) {
+			rte_panic("Cannot create ring to connect rx-thread %u "
+					"with tx-thread %u\n", rx_thread_id, tx_thread_id);
+		}
+
+		rx_conf->ring[rx_conf->n_ring] = ring;
+
+		tx_conf->ring = ring;
+		tx_conf->ready = &rx_conf->ready[rx_conf->n_ring];
+
+		rx_conf->n_ring++;
+	}
+	return 0;
+}
+
+static int
+init_rx_queues(void)
+{
+	uint16_t i, nb_rx_queue;
+	uint8_t thread;
+
+	n_rx_thread = 0;
+
+	for (i = 0; i < nb_rx_thread_params; ++i) {
+		thread = rx_thread_params[i].thread_id;
+		nb_rx_queue = rx_thread[thread].n_rx_queue;
+
+		if (nb_rx_queue >= MAX_RX_QUEUE_PER_LCORE) {
+			printf("error: too many queues (%u) for thread: %u\n",
+				(unsigned)nb_rx_queue + 1, (unsigned)thread);
+			return -1;
+		}
+
+		rx_thread[thread].conf.thread_id = thread;
+		rx_thread[thread].conf.lcore_id = rx_thread_params[i].lcore_id;
+		rx_thread[thread].rx_queue_list[nb_rx_queue].port_id =
+			rx_thread_params[i].port_id;
+		rx_thread[thread].rx_queue_list[nb_rx_queue].queue_id =
+			rx_thread_params[i].queue_id;
+		rx_thread[thread].n_rx_queue++;
+
+		if (thread >= n_rx_thread)
+			n_rx_thread = thread + 1;
+
+	}
+	return 0;
+}
+
+static int
+init_tx_threads(void)
+{
+	int i;
+
+	n_tx_thread = 0;
+	for (i = 0; i < nb_tx_thread_params; ++i) {
+		tx_thread[n_tx_thread].conf.thread_id = tx_thread_params[i].thread_id;
+		tx_thread[n_tx_thread].conf.lcore_id = tx_thread_params[i].lcore_id;
+		n_tx_thread++;
+	}
+	return 0;
+}
+
+/* display usage */
+static void
+print_usage(const char *prgname)
+{
+	printf("%s [EAL options] -- -p PORTMASK -P"
+		"  [--rx (port,queue,lcore,thread)[,(port,queue,lcore,thread]]"
+		"  [--tx (lcore,thread)[,(lcore,thread]]"
+		"  [--enable-jumbo [--max-pkt-len PKTLEN]]\n"
+		"  [--parse-ptype]\n\n"
+		"  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
+		"  -P : enable promiscuous mode\n"
+		"  --rx (port,queue,lcore,thread): rx queues configuration\n"
+		"  --tx (lcore,thread): tx threads configuration\n"
+		"  --stat-lcore LCORE: use lcore for stat collector\n"
+		"  --eth-dest=X,MM:MM:MM:MM:MM:MM: optional, ethernet destination for port X\n"
+		"  --no-numa: optional, disable numa awareness\n"
+		"  --ipv6: optional, specify it if running ipv6 packets\n"
+		"  --enable-jumbo: enable jumbo frame"
+		" which max packet len is PKTLEN in decimal (64-9600)\n"
+		"  --hash-entry-num: specify the hash entry number in hexadecimal to be setup\n"
+		"  --no-lthreads: turn off lthread model\n"
+		"  --parse-ptype: set to use software to analyze packet type\n\n",
+		prgname);
+}
+
+static int parse_max_pkt_len(const char *pktlen)
+{
+	char *end = NULL;
+	unsigned long len;
+
+	/* parse decimal string */
+	len = strtoul(pktlen, &end, 10);
+	if ((pktlen[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (len == 0)
+		return -1;
+
+	return len;
+}
+
+static int
+parse_portmask(const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* parse hexadecimal string */
+	pm = strtoul(portmask, &end, 16);
+	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (pm == 0)
+		return -1;
+
+	return pm;
+}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+static int
+parse_hash_entry_number(const char *hash_entry_num)
+{
+	char *end = NULL;
+	unsigned long hash_en;
+
+	/* parse hexadecimal string */
+	hash_en = strtoul(hash_entry_num, &end, 16);
+	if ((hash_entry_num[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (hash_en == 0)
+		return -1;
+
+	return hash_en;
+}
+#endif
+
+static int
+parse_rx_config(const char *q_arg)
+{
+	char s[256];
+	const char *p, *p0 = q_arg;
+	char *end;
+	enum fieldnames {
+		FLD_PORT = 0,
+		FLD_QUEUE,
+		FLD_LCORE,
+		FLD_THREAD,
+		_NUM_FLD
+	};
+	unsigned long int_fld[_NUM_FLD];
+	char *str_fld[_NUM_FLD];
+	int i;
+	unsigned size;
+
+	nb_rx_thread_params = 0;
+
+	while ((p = strchr(p0, '(')) != NULL) {
+		++p;
+		p0 = strchr(p, ')');
+		if (p0 == NULL)
+			return -1;
+
+		size = p0 - p;
+		if (size >= sizeof(s))
+			return -1;
+
+		snprintf(s, sizeof(s), "%.*s", size, p);
+		if (rte_strsplit(s, sizeof(s), str_fld, _NUM_FLD, ',') != _NUM_FLD)
+			return -1;
+		for (i = 0; i < _NUM_FLD; i++) {
+			errno = 0;
+			int_fld[i] = strtoul(str_fld[i], &end, 0);
+			if (errno != 0 || end == str_fld[i] || int_fld[i] > 255)
+				return -1;
+		}
+		if (nb_rx_thread_params >= MAX_LCORE_PARAMS) {
+			printf("exceeded max number of rx params: %hu\n",
+					nb_rx_thread_params);
+			return -1;
+		}
+		rx_thread_params_array[nb_rx_thread_params].port_id =
+				(uint8_t)int_fld[FLD_PORT];
+		rx_thread_params_array[nb_rx_thread_params].queue_id =
+				(uint8_t)int_fld[FLD_QUEUE];
+		rx_thread_params_array[nb_rx_thread_params].lcore_id =
+				(uint8_t)int_fld[FLD_LCORE];
+		rx_thread_params_array[nb_rx_thread_params].thread_id =
+				(uint8_t)int_fld[FLD_THREAD];
+		++nb_rx_thread_params;
+	}
+	rx_thread_params = rx_thread_params_array;
+	return 0;
+}
+
+static int
+parse_tx_config(const char *q_arg)
+{
+	char s[256];
+	const char *p, *p0 = q_arg;
+	char *end;
+	enum fieldnames {
+		FLD_LCORE = 0,
+		FLD_THREAD,
+		_NUM_FLD
+	};
+	unsigned long int_fld[_NUM_FLD];
+	char *str_fld[_NUM_FLD];
+	int i;
+	unsigned size;
+
+	nb_tx_thread_params = 0;
+
+	while ((p = strchr(p0, '(')) != NULL) {
+		++p;
+		p0 = strchr(p, ')');
+		if (p0 == NULL)
+			return -1;
+
+		size = p0 - p;
+		if (size >= sizeof(s))
+			return -1;
+
+		snprintf(s, sizeof(s), "%.*s", size, p);
+		if (rte_strsplit(s, sizeof(s), str_fld, _NUM_FLD, ',') != _NUM_FLD)
+			return -1;
+		for (i = 0; i < _NUM_FLD; i++) {
+			errno = 0;
+			int_fld[i] = strtoul(str_fld[i], &end, 0);
+			if (errno != 0 || end == str_fld[i] || int_fld[i] > 255)
+				return -1;
+		}
+		if (nb_tx_thread_params >= MAX_LCORE_PARAMS) {
+			printf("exceeded max number of tx params: %hu\n",
+				nb_tx_thread_params);
+			return -1;
+		}
+		tx_thread_params_array[nb_tx_thread_params].lcore_id =
+				(uint8_t)int_fld[FLD_LCORE];
+		tx_thread_params_array[nb_tx_thread_params].thread_id =
+				(uint8_t)int_fld[FLD_THREAD];
+		++nb_tx_thread_params;
+	}
+	tx_thread_params = tx_thread_params_array;
+
+	return 0;
+}
+
+#if (APP_CPU_LOAD > 0)
+static int
+parse_stat_lcore(const char *stat_lcore)
+{
+	char *end = NULL;
+	unsigned long lcore_id;
+
+	lcore_id = strtoul(stat_lcore, &end, 10);
+	if ((stat_lcore[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	return lcore_id;
+}
+#endif
+
+static void
+parse_eth_dest(const char *optarg)
+{
+	uint8_t portid;
+	char *port_end;
+	uint8_t c, *dest, peer_addr[6];
+
+	errno = 0;
+	portid = strtoul(optarg, &port_end, 10);
+	if (errno != 0 || port_end == optarg || *port_end++ != ',')
+		rte_exit(EXIT_FAILURE,
+		"Invalid eth-dest: %s", optarg);
+	if (portid >= RTE_MAX_ETHPORTS)
+		rte_exit(EXIT_FAILURE,
+		"eth-dest: port %d >= RTE_MAX_ETHPORTS(%d)\n",
+		portid, RTE_MAX_ETHPORTS);
+
+	if (cmdline_parse_etheraddr(NULL, port_end,
+		&peer_addr, sizeof(peer_addr)) < 0)
+		rte_exit(EXIT_FAILURE,
+		"Invalid ethernet address: %s\n",
+		port_end);
+	dest = (uint8_t *)&dest_eth_addr[portid];
+	for (c = 0; c < 6; c++)
+		dest[c] = peer_addr[c];
+	*(uint64_t *)(val_eth + portid) = dest_eth_addr[portid];
+}
+
+#define CMD_LINE_OPT_RX_CONFIG "rx"
+#define CMD_LINE_OPT_TX_CONFIG "tx"
+#define CMD_LINE_OPT_STAT_LCORE "stat-lcore"
+#define CMD_LINE_OPT_ETH_DEST "eth-dest"
+#define CMD_LINE_OPT_NO_NUMA "no-numa"
+#define CMD_LINE_OPT_IPV6 "ipv6"
+#define CMD_LINE_OPT_ENABLE_JUMBO "enable-jumbo"
+#define CMD_LINE_OPT_HASH_ENTRY_NUM "hash-entry-num"
+#define CMD_LINE_OPT_NO_LTHREADS "no-lthreads"
+#define CMD_LINE_OPT_PARSE_PTYPE "parse-ptype"
+
+/* Parse the argument given in the command line of the application */
+static int
+parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = {
+		{CMD_LINE_OPT_RX_CONFIG, 1, 0, 0},
+		{CMD_LINE_OPT_TX_CONFIG, 1, 0, 0},
+		{CMD_LINE_OPT_STAT_LCORE, 1, 0, 0},
+		{CMD_LINE_OPT_ETH_DEST, 1, 0, 0},
+		{CMD_LINE_OPT_NO_NUMA, 0, 0, 0},
+		{CMD_LINE_OPT_IPV6, 0, 0, 0},
+		{CMD_LINE_OPT_ENABLE_JUMBO, 0, 0, 0},
+		{CMD_LINE_OPT_HASH_ENTRY_NUM, 1, 0, 0},
+		{CMD_LINE_OPT_NO_LTHREADS, 0, 0, 0},
+		{CMD_LINE_OPT_PARSE_PTYPE, 0, 0, 0},
+		{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:P",
+				lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		/* portmask */
+		case 'p':
+			enabled_port_mask = parse_portmask(optarg);
+			if (enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				print_usage(prgname);
+				return -1;
+			}
+			break;
+		case 'P':
+			printf("Promiscuous mode selected\n");
+			promiscuous_on = 1;
+			break;
+
+		/* long options */
+		case 0:
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_RX_CONFIG,
+				sizeof(CMD_LINE_OPT_RX_CONFIG))) {
+				ret = parse_rx_config(optarg);
+				if (ret) {
+					printf("invalid rx-config\n");
+					print_usage(prgname);
+					return -1;
+				}
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_TX_CONFIG,
+				sizeof(CMD_LINE_OPT_TX_CONFIG))) {
+				ret = parse_tx_config(optarg);
+				if (ret) {
+					printf("invalid tx-config\n");
+					print_usage(prgname);
+					return -1;
+				}
+			}
+
+#if (APP_CPU_LOAD > 0)
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_STAT_LCORE,
+					sizeof(CMD_LINE_OPT_STAT_LCORE))) {
+				cpu_load_lcore_id = parse_stat_lcore(optarg);
+			}
+#endif
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_ETH_DEST,
+				sizeof(CMD_LINE_OPT_ETH_DEST)))
+					parse_eth_dest(optarg);
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_NO_NUMA,
+				sizeof(CMD_LINE_OPT_NO_NUMA))) {
+				printf("numa is disabled\n");
+				numa_on = 0;
+			}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_IPV6,
+				sizeof(CMD_LINE_OPT_IPV6))) {
+				printf("ipv6 is specified\n");
+				ipv6 = 1;
+			}
+#endif
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_NO_LTHREADS,
+					sizeof(CMD_LINE_OPT_NO_LTHREADS))) {
+				printf("l-threads model is disabled\n");
+				lthreads_on = 0;
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_PARSE_PTYPE,
+					sizeof(CMD_LINE_OPT_PARSE_PTYPE))) {
+				printf("software packet type parsing enabled\n");
+				parse_ptype_on = 1;
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_ENABLE_JUMBO,
+				sizeof(CMD_LINE_OPT_ENABLE_JUMBO))) {
+				struct option lenopts = {"max-pkt-len", required_argument, 0,
+						0};
+
+				printf("jumbo frame is enabled - disabling simple TX path\n");
+				port_conf.rxmode.jumbo_frame = 1;
+
+				/* if no max-pkt-len set, use the default value ETHER_MAX_LEN */
+				if (0 == getopt_long(argc, argvopt, "", &lenopts,
+						&option_index)) {
+
+					ret = parse_max_pkt_len(optarg);
+					if ((ret < 64) || (ret > MAX_JUMBO_PKT_LEN)) {
+						printf("invalid packet length\n");
+						print_usage(prgname);
+						return -1;
+					}
+					port_conf.rxmode.max_rx_pkt_len = ret;
+				}
+				printf("set jumbo frame max packet length to %u\n",
+						(unsigned int)port_conf.rxmode.max_rx_pkt_len);
+			}
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_HASH_ENTRY_NUM,
+				sizeof(CMD_LINE_OPT_HASH_ENTRY_NUM))) {
+				ret = parse_hash_entry_number(optarg);
+				if ((ret > 0) && (ret <= L3FWD_HASH_ENTRIES)) {
+					hash_entry_number = ret;
+				} else {
+					printf("invalid hash entry number\n");
+					print_usage(prgname);
+					return -1;
+				}
+			}
+#endif
+			break;
+
+		default:
+			print_usage(prgname);
+			return -1;
+		}
+	}
+
+	if (optind >= 0)
+		argv[optind-1] = prgname;
+
+	ret = optind-1;
+	optind = 1; /* reset getopt lib */
+	return ret;
+}
+
+static void
+print_ethaddr(const char *name, const struct ether_addr *eth_addr)
+{
+	char buf[ETHER_ADDR_FMT_SIZE];
+
+	ether_format_addr(buf, ETHER_ADDR_FMT_SIZE, eth_addr);
+	printf("%s%s", name, buf);
+}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+static void convert_ipv4_5tuple(struct ipv4_5tuple *key1,
+		union ipv4_5tuple_host *key2)
+{
+	key2->ip_dst = rte_cpu_to_be_32(key1->ip_dst);
+	key2->ip_src = rte_cpu_to_be_32(key1->ip_src);
+	key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
+	key2->port_src = rte_cpu_to_be_16(key1->port_src);
+	key2->proto = key1->proto;
+	key2->pad0 = 0;
+	key2->pad1 = 0;
+}
+
+static void convert_ipv6_5tuple(struct ipv6_5tuple *key1,
+		union ipv6_5tuple_host *key2)
+{
+	uint32_t i;
+
+	for (i = 0; i < 16; i++) {
+		key2->ip_dst[i] = key1->ip_dst[i];
+		key2->ip_src[i] = key1->ip_src[i];
+	}
+	key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
+	key2->port_src = rte_cpu_to_be_16(key1->port_src);
+	key2->proto = key1->proto;
+	key2->pad0 = 0;
+	key2->pad1 = 0;
+	key2->reserve = 0;
+}
+
+#define BYTE_VALUE_MAX 256
+#define ALL_32_BITS 0xffffffff
+#define BIT_8_TO_15 0x0000ff00
+static inline void
+populate_ipv4_few_flow_into_table(const struct rte_hash *h)
+{
+	uint32_t i;
+	int32_t ret;
+	uint32_t array_len = RTE_DIM(ipv4_l3fwd_route_array);
+
+	mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_8_TO_15);
+	for (i = 0; i < array_len; i++) {
+		struct ipv4_l3fwd_route  entry;
+		union ipv4_5tuple_host newkey;
+
+		entry = ipv4_l3fwd_route_array[i];
+		convert_ipv4_5tuple(&entry.key, &newkey);
+		ret = rte_hash_add_key(h, (void *)&newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
+				" to the l3fwd hash.\n", i);
+		}
+		ipv4_l3fwd_out_if[ret] = entry.if_out;
+	}
+	printf("Hash: Adding 0x%" PRIx32 " keys\n", array_len);
+}
+
+#define BIT_16_TO_23 0x00ff0000
+static inline void
+populate_ipv6_few_flow_into_table(const struct rte_hash *h)
+{
+	uint32_t i;
+	int32_t ret;
+	uint32_t array_len = RTE_DIM(ipv6_l3fwd_route_array);
+
+	mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_16_TO_23);
+	mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
+	for (i = 0; i < array_len; i++) {
+		struct ipv6_l3fwd_route entry;
+		union ipv6_5tuple_host newkey;
+
+		entry = ipv6_l3fwd_route_array[i];
+		convert_ipv6_5tuple(&entry.key, &newkey);
+		ret = rte_hash_add_key(h, (void *)&newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
+				" to the l3fwd hash.\n", i);
+		}
+		ipv6_l3fwd_out_if[ret] = entry.if_out;
+	}
+	printf("Hash: Adding 0x%" PRIx32 "keys\n", array_len);
+}
+
+#define NUMBER_PORT_USED 4
+static inline void
+populate_ipv4_many_flow_into_table(const struct rte_hash *h,
+		unsigned int nr_flow)
+{
+	unsigned i;
+
+	mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_8_TO_15);
+
+	for (i = 0; i < nr_flow; i++) {
+		struct ipv4_l3fwd_route entry;
+		union ipv4_5tuple_host newkey;
+		uint8_t a = (uint8_t)((i / NUMBER_PORT_USED) % BYTE_VALUE_MAX);
+		uint8_t b = (uint8_t)(((i / NUMBER_PORT_USED) / BYTE_VALUE_MAX) %
+				BYTE_VALUE_MAX);
+		uint8_t c = (uint8_t)((i / NUMBER_PORT_USED) / (BYTE_VALUE_MAX *
+				BYTE_VALUE_MAX));
+		/* Create the ipv4 exact match flow */
+		memset(&entry, 0, sizeof(entry));
+		switch (i & (NUMBER_PORT_USED - 1)) {
+		case 0:
+			entry = ipv4_l3fwd_route_array[0];
+			entry.key.ip_dst = IPv4(101, c, b, a);
+			break;
+		case 1:
+			entry = ipv4_l3fwd_route_array[1];
+			entry.key.ip_dst = IPv4(201, c, b, a);
+			break;
+		case 2:
+			entry = ipv4_l3fwd_route_array[2];
+			entry.key.ip_dst = IPv4(111, c, b, a);
+			break;
+		case 3:
+			entry = ipv4_l3fwd_route_array[3];
+			entry.key.ip_dst = IPv4(211, c, b, a);
+			break;
+		};
+		convert_ipv4_5tuple(&entry.key, &newkey);
+		int32_t ret = rte_hash_add_key(h, (void *)&newkey);
+
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
+
+		ipv4_l3fwd_out_if[ret] = (uint8_t)entry.if_out;
+
+	}
+	printf("Hash: Adding 0x%x keys\n", nr_flow);
+}
+
+static inline void
+populate_ipv6_many_flow_into_table(const struct rte_hash *h,
+		unsigned int nr_flow)
+{
+	unsigned i;
+
+	mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_16_TO_23);
+	mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
+	for (i = 0; i < nr_flow; i++) {
+		struct ipv6_l3fwd_route entry;
+		union ipv6_5tuple_host newkey;
+
+		uint8_t a = (uint8_t) ((i / NUMBER_PORT_USED) % BYTE_VALUE_MAX);
+		uint8_t b = (uint8_t) (((i / NUMBER_PORT_USED) / BYTE_VALUE_MAX) %
+				BYTE_VALUE_MAX);
+		uint8_t c = (uint8_t) ((i / NUMBER_PORT_USED) / (BYTE_VALUE_MAX *
+				BYTE_VALUE_MAX));
+
+		/* Create the ipv6 exact match flow */
+		memset(&entry, 0, sizeof(entry));
+		switch (i & (NUMBER_PORT_USED - 1)) {
+		case 0:
+			entry = ipv6_l3fwd_route_array[0];
+			break;
+		case 1:
+			entry = ipv6_l3fwd_route_array[1];
+			break;
+		case 2:
+			entry = ipv6_l3fwd_route_array[2];
+			break;
+		case 3:
+			entry = ipv6_l3fwd_route_array[3];
+			break;
+		};
+		entry.key.ip_dst[13] = c;
+		entry.key.ip_dst[14] = b;
+		entry.key.ip_dst[15] = a;
+		convert_ipv6_5tuple(&entry.key, &newkey);
+		int32_t ret = rte_hash_add_key(h, (void *)&newkey);
+
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
+
+		ipv6_l3fwd_out_if[ret] = (uint8_t) entry.if_out;
+
+	}
+	printf("Hash: Adding 0x%x keys\n", nr_flow);
+}
+
+static void
+setup_hash(int socketid)
+{
+	struct rte_hash_parameters ipv4_l3fwd_hash_params = {
+		.name = NULL,
+		.entries = L3FWD_HASH_ENTRIES,
+		.key_len = sizeof(union ipv4_5tuple_host),
+		.hash_func = ipv4_hash_crc,
+		.hash_func_init_val = 0,
+	};
+
+	struct rte_hash_parameters ipv6_l3fwd_hash_params = {
+		.name = NULL,
+		.entries = L3FWD_HASH_ENTRIES,
+		.key_len = sizeof(union ipv6_5tuple_host),
+		.hash_func = ipv6_hash_crc,
+		.hash_func_init_val = 0,
+	};
+
+	char s[64];
+
+	/* create ipv4 hash */
+	snprintf(s, sizeof(s), "ipv4_l3fwd_hash_%d", socketid);
+	ipv4_l3fwd_hash_params.name = s;
+	ipv4_l3fwd_hash_params.socket_id = socketid;
+	ipv4_l3fwd_lookup_struct[socketid] =
+			rte_hash_create(&ipv4_l3fwd_hash_params);
+	if (ipv4_l3fwd_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the l3fwd hash on "
+				"socket %d\n", socketid);
+
+	/* create ipv6 hash */
+	snprintf(s, sizeof(s), "ipv6_l3fwd_hash_%d", socketid);
+	ipv6_l3fwd_hash_params.name = s;
+	ipv6_l3fwd_hash_params.socket_id = socketid;
+	ipv6_l3fwd_lookup_struct[socketid] =
+			rte_hash_create(&ipv6_l3fwd_hash_params);
+	if (ipv6_l3fwd_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the l3fwd hash on "
+				"socket %d\n", socketid);
+
+	if (hash_entry_number != HASH_ENTRY_NUMBER_DEFAULT) {
+		/* For testing hash matching with a large number of flows we
+		 * generate millions of IP 5-tuples with an incremented dst
+		 * address to initialize the hash table. */
+		if (ipv6 == 0) {
+			/* populate the ipv4 hash */
+			populate_ipv4_many_flow_into_table(
+				ipv4_l3fwd_lookup_struct[socketid], hash_entry_number);
+		} else {
+			/* populate the ipv6 hash */
+			populate_ipv6_many_flow_into_table(
+				ipv6_l3fwd_lookup_struct[socketid], hash_entry_number);
+		}
+	} else {
+		/* Use data in ipv4/ipv6 l3fwd lookup table directly to initialize
+		 * the hash table */
+		if (ipv6 == 0) {
+			/* populate the ipv4 hash */
+			populate_ipv4_few_flow_into_table(
+					ipv4_l3fwd_lookup_struct[socketid]);
+		} else {
+			/* populate the ipv6 hash */
+			populate_ipv6_few_flow_into_table(
+					ipv6_l3fwd_lookup_struct[socketid]);
+		}
+	}
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+static void
+setup_lpm(int socketid)
+{
+	struct rte_lpm6_config config;
+	struct rte_lpm_config lpm_ipv4_config;
+	unsigned i;
+	int ret;
+	char s[64];
+
+	/* create the LPM table */
+	snprintf(s, sizeof(s), "IPV4_L3FWD_LPM_%d", socketid);
+	lpm_ipv4_config.max_rules = IPV4_L3FWD_LPM_MAX_RULES;
+	lpm_ipv4_config.number_tbl8s = 256;
+	lpm_ipv4_config.flags = 0;
+	ipv4_l3fwd_lookup_struct[socketid] =
+			rte_lpm_create(s, socketid, &lpm_ipv4_config);
+	if (ipv4_l3fwd_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the l3fwd LPM table"
+				" on socket %d\n", socketid);
+
+	/* populate the LPM table */
+	for (i = 0; i < IPV4_L3FWD_NUM_ROUTES; i++) {
+
+		/* skip unused ports */
+		if ((1 << ipv4_l3fwd_route_array[i].if_out &
+				enabled_port_mask) == 0)
+			continue;
+
+		ret = rte_lpm_add(ipv4_l3fwd_lookup_struct[socketid],
+			ipv4_l3fwd_route_array[i].ip,
+			ipv4_l3fwd_route_array[i].depth,
+			ipv4_l3fwd_route_array[i].if_out);
+
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u to the "
+				"l3fwd LPM table on socket %d\n",
+				i, socketid);
+		}
+
+		printf("LPM: Adding route 0x%08x / %d (%d)\n",
+			(unsigned)ipv4_l3fwd_route_array[i].ip,
+			ipv4_l3fwd_route_array[i].depth,
+			ipv4_l3fwd_route_array[i].if_out);
+	}
+
+	/* create the LPM6 table */
+	snprintf(s, sizeof(s), "IPV6_L3FWD_LPM_%d", socketid);
+
+	config.max_rules = IPV6_L3FWD_LPM_MAX_RULES;
+	config.number_tbl8s = IPV6_L3FWD_LPM_NUMBER_TBL8S;
+	config.flags = 0;
+	ipv6_l3fwd_lookup_struct[socketid] = rte_lpm6_create(s, socketid,
+				&config);
+	if (ipv6_l3fwd_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the l3fwd LPM table"
+				" on socket %d\n", socketid);
+
+	/* populate the LPM table */
+	for (i = 0; i < IPV6_L3FWD_NUM_ROUTES; i++) {
+
+		/* skip unused ports */
+		if ((1 << ipv6_l3fwd_route_array[i].if_out &
+				enabled_port_mask) == 0)
+			continue;
+
+		ret = rte_lpm6_add(ipv6_l3fwd_lookup_struct[socketid],
+			ipv6_l3fwd_route_array[i].ip,
+			ipv6_l3fwd_route_array[i].depth,
+			ipv6_l3fwd_route_array[i].if_out);
+
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u to the "
+				"l3fwd LPM table on socket %d\n",
+				i, socketid);
+		}
+
+		printf("LPM: Adding route %s / %d (%d)\n",
+			"IPV6",
+			ipv6_l3fwd_route_array[i].depth,
+			ipv6_l3fwd_route_array[i].if_out);
+	}
+}
+#endif
+
+static int
+init_mem(unsigned nb_mbuf)
+{
+	struct lcore_conf *qconf;
+	int socketid;
+	unsigned lcore_id;
+	char s[64];
+
+	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+		if (rte_lcore_is_enabled(lcore_id) == 0)
+			continue;
+
+		if (numa_on)
+			socketid = rte_lcore_to_socket_id(lcore_id);
+		else
+			socketid = 0;
+
+		if (socketid >= NB_SOCKETS) {
+			rte_exit(EXIT_FAILURE, "Socket %d of lcore %u is out of range %d\n",
+				socketid, lcore_id, NB_SOCKETS);
+		}
+		if (pktmbuf_pool[socketid] == NULL) {
+			snprintf(s, sizeof(s), "mbuf_pool_%d", socketid);
+			pktmbuf_pool[socketid] =
+				rte_pktmbuf_pool_create(s, nb_mbuf,
+					MEMPOOL_CACHE_SIZE, 0,
+					RTE_MBUF_DEFAULT_BUF_SIZE, socketid);
+			if (pktmbuf_pool[socketid] == NULL)
+				rte_exit(EXIT_FAILURE,
+						"Cannot init mbuf pool on socket %d\n", socketid);
+			else
+				printf("Allocated mbuf pool on socket %d\n", socketid);
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+			setup_lpm(socketid);
+#else
+			setup_hash(socketid);
+#endif
+		}
+		qconf = &lcore_conf[lcore_id];
+		qconf->ipv4_lookup_struct = ipv4_l3fwd_lookup_struct[socketid];
+		qconf->ipv6_lookup_struct = ipv6_l3fwd_lookup_struct[socketid];
+	}
+	return 0;
+}
+
+/* Check the link status of all ports in up to 9s, and print them finally */
+static void
+check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
+{
+#define CHECK_INTERVAL 100 /* 100ms */
+#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
+	uint8_t portid, count, all_ports_up, print_flag = 0;
+	struct rte_eth_link link;
+
+	printf("\nChecking link status");
+	fflush(stdout);
+	for (count = 0; count <= MAX_CHECK_TIME; count++) {
+		all_ports_up = 1;
+		for (portid = 0; portid < port_num; portid++) {
+			if ((port_mask & (1 << portid)) == 0)
+				continue;
+			memset(&link, 0, sizeof(link));
+			rte_eth_link_get_nowait(portid, &link);
+			/* print link status if flag set */
+			if (print_flag == 1) {
+				if (link.link_status)
+					printf("Port %d Link Up - speed %u "
+						"Mbps - %s\n", (uint8_t)portid,
+						(unsigned)link.link_speed,
+				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+					("full-duplex") : ("half-duplex\n"));
+				else
+					printf("Port %d Link Down\n",
+						(uint8_t)portid);
+				continue;
+			}
+			/* clear all_ports_up flag if any link down */
+			if (link.link_status == ETH_LINK_DOWN) {
+				all_ports_up = 0;
+				break;
+			}
+		}
+		/* after finally printing all link status, get out */
+		if (print_flag == 1)
+			break;
+
+		if (all_ports_up == 0) {
+			printf(".");
+			fflush(stdout);
+			rte_delay_ms(CHECK_INTERVAL);
+		}
+
+		/* set the print_flag if all ports up or timeout */
+		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
+			print_flag = 1;
+			printf("done\n");
+		}
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_txconf *txconf;
+	int ret;
+	int i;
+	unsigned nb_ports;
+	uint16_t queueid;
+	unsigned lcore_id;
+	uint32_t n_tx_queue, nb_lcores;
+	uint8_t portid, nb_rx_queue, queue, socketid;
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL parameters\n");
+	argc -= ret;
+	argv += ret;
+
+	/* pre-init dst MACs for all ports to 02:00:00:00:00:xx */
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+		dest_eth_addr[portid] = ETHER_LOCAL_ADMIN_ADDR +
+				((uint64_t)portid << 40);
+		*(uint64_t *)(val_eth + portid) = dest_eth_addr[portid];
+	}
+
+	/* parse application arguments (after the EAL ones) */
+	ret = parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid L3FWD parameters\n");
+
+	if (check_lcore_params() < 0)
+		rte_exit(EXIT_FAILURE, "check_lcore_params failed\n");
+
+	printf("Initializing rx-queues...\n");
+	ret = init_rx_queues();
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "init_rx_queues failed\n");
+
+	printf("Initializing tx-threads...\n");
+	ret = init_tx_threads();
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "init_tx_threads failed\n");
+
+	printf("Initializing rings...\n");
+	ret = init_rx_rings();
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "init_rx_rings failed\n");
+
+	nb_ports = rte_eth_dev_count();
+
+	if (check_port_config(nb_ports) < 0)
+		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
+
+	nb_lcores = rte_lcore_count();
+
+	/* initialize all ports */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			printf("\nSkipping disabled port %d\n", portid);
+			continue;
+		}
+
+		/* init port */
+		printf("Initializing port %d ... ", portid);
+		fflush(stdout);
+
+		nb_rx_queue = get_port_n_rx_queues(portid);
+		n_tx_queue = nb_lcores;
+		if (n_tx_queue > MAX_TX_QUEUE_PER_PORT)
+			n_tx_queue = MAX_TX_QUEUE_PER_PORT;
+		printf("Creating queues: nb_rxq=%d nb_txq=%u... ",
+			nb_rx_queue, (unsigned)n_tx_queue);
+		ret = rte_eth_dev_configure(portid, nb_rx_queue,
+					(uint16_t)n_tx_queue, &port_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%d\n",
+				ret, portid);
+
+		rte_eth_macaddr_get(portid, &ports_eth_addr[portid]);
+		print_ethaddr(" Address:", &ports_eth_addr[portid]);
+		printf(", ");
+		print_ethaddr("Destination:",
+			(const struct ether_addr *)&dest_eth_addr[portid]);
+		printf(", ");
+
+		/*
+		 * prepare src MACs for each port.
+		 */
+		ether_addr_copy(&ports_eth_addr[portid],
+			(struct ether_addr *)(val_eth + portid) + 1);
+
+		/* init memory */
+		ret = init_mem(NB_MBUF);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "init_mem failed\n");
+
+		/* init one TX queue per couple (lcore,port) */
+		queueid = 0;
+		for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+			if (rte_lcore_is_enabled(lcore_id) == 0)
+				continue;
+
+			if (numa_on)
+				socketid = (uint8_t)rte_lcore_to_socket_id(lcore_id);
+			else
+				socketid = 0;
+
+			printf("txq=%u,%d,%d ", lcore_id, queueid, socketid);
+			fflush(stdout);
+
+			rte_eth_dev_info_get(portid, &dev_info);
+			txconf = &dev_info.default_txconf;
+			if (port_conf.rxmode.jumbo_frame)
+				txconf->txq_flags = 0;
+			ret = rte_eth_tx_queue_setup(portid, queueid, nb_txd,
+						     socketid, txconf);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup: err=%d, "
+					"port=%d\n", ret, portid);
+
+			tx_thread[lcore_id].tx_queue_id[portid] = queueid;
+			queueid++;
+		}
+		printf("\n");
+	}
+
+	for (i = 0; i < n_rx_thread; i++) {
+		lcore_id = rx_thread[i].conf.lcore_id;
+
+		if (rte_lcore_is_enabled(lcore_id) == 0) {
+			rte_exit(EXIT_FAILURE,
+					"Cannot start Rx thread on lcore %u: lcore disabled\n",
+					lcore_id
+				);
+		}
+
+		printf("\nInitializing rx queues for Rx thread %d on lcore %u ... ",
+				i, lcore_id);
+		fflush(stdout);
+
+		/* init RX queues */
+		for (queue = 0; queue < rx_thread[i].n_rx_queue; ++queue) {
+			portid = rx_thread[i].rx_queue_list[queue].port_id;
+			queueid = rx_thread[i].rx_queue_list[queue].queue_id;
+
+			if (numa_on)
+				socketid = (uint8_t)rte_lcore_to_socket_id(lcore_id);
+			else
+				socketid = 0;
+
+			printf("rxq=%d,%d,%d ", portid, queueid, socketid);
+			fflush(stdout);
+
+			ret = rte_eth_rx_queue_setup(portid, queueid, nb_rxd,
+					socketid,
+					NULL,
+					pktmbuf_pool[socketid]);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup: err=%d, "
+						"port=%d\n", ret, portid);
+		}
+	}
+
+	printf("\n");
+
+	/* start ports */
+	for (portid = 0; portid < nb_ports; portid++) {
+		if ((enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		/* Start device */
+		ret = rte_eth_dev_start(portid);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: err=%d, port=%d\n",
+				ret, portid);
+
+		/*
+		 * If enabled, put device in promiscuous mode.
+		 * This allows IO forwarding mode to forward packets
+		 * to itself through 2 cross-connected  ports of the
+		 * target machine.
+		 */
+		if (promiscuous_on)
+			rte_eth_promiscuous_enable(portid);
+	}
+
+	for (i = 0; i < n_rx_thread; i++) {
+		lcore_id = rx_thread[i].conf.lcore_id;
+		if (rte_lcore_is_enabled(lcore_id) == 0)
+			continue;
+
+		/* check if hw packet type is supported */
+		for (queue = 0; queue < rx_thread[i].n_rx_queue; ++queue) {
+			portid = rx_thread[i].rx_queue_list[queue].port_id;
+			queueid = rx_thread[i].rx_queue_list[queue].queue_id;
+
+			if (parse_ptype_on) {
+				if (!rte_eth_add_rx_callback(portid, queueid,
+						cb_parse_ptype, NULL))
+					rte_exit(EXIT_FAILURE,
+						"Failed to add rx callback: "
+						"port=%d\n", portid);
+			} else if (!check_ptype(portid))
+				rte_exit(EXIT_FAILURE,
+					"Port %d cannot parse packet type.\n\n"
+					"Please add --parse-ptype to use sw "
+					"packet type analyzer.\n\n",
+					portid);
+		}
+	}
+
+	check_all_ports_link_status((uint8_t)nb_ports, enabled_port_mask);
+
+	if (lthreads_on) {
+		printf("Starting L-Threading Model\n");
+
+#if (APP_CPU_LOAD > 0)
+		if (cpu_load_lcore_id > 0)
+			/* Use one lcore for cpu load collector */
+			nb_lcores--;
+#endif
+
+		lthread_num_schedulers_set(nb_lcores);
+		rte_eal_mp_remote_launch(sched_spawner, NULL, SKIP_MASTER);
+		lthread_master_spawner(NULL);
+
+	} else {
+		printf("Starting P-Threading Model\n");
+		/* launch per-lcore init on every lcore */
+		rte_eal_mp_remote_launch(pthread_run, NULL, CALL_MASTER);
+		RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+			if (rte_eal_wait_lcore(lcore_id) < 0)
+				return -1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/test.sh b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/test.sh
new file mode 100755
index 00000000..b7718b62
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/l3fwd-thread/test.sh
@@ -0,0 +1,149 @@
+#!/bin/bash
+
+case "$1" in
+
+	######################
+	# 1 L-core per pcore #
+	######################
+
+	"1.1")
+		echo "1.1 1 L-core per pcore (N=2)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3 \
+				--enable-jumbo --max-pkt-len 1500  \
+				--rx="(0,0,0,0)(1,0,0,0)"          \
+				--tx="(1,0)"                       \
+				--stat-lcore 2                     \
+				--no-lthread
+
+		;;
+
+	"1.2")
+		echo "1.2 1 L-core per pcore (N=4)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3 \
+				--enable-jumbo --max-pkt-len 1500  \
+				--rx="(0,0,0,0)(1,0,1,1)"          \
+				--tx="(2,0)(3,1)"                  \
+				--stat-lcore 4                     \
+				--no-lthread
+		;;
+
+	"1.3")
+		echo "1.3 1 L-core per pcore (N=8)"
+
+		./build/l3fwd-thread -c 1ff -n 2 -- -P -p 3                          \
+				--enable-jumbo --max-pkt-len 1500                            \
+				--rx="(0,0,0,0)(0,1,1,1)(1,0,2,2)(1,1,3,3)"                  \
+				--tx="(4,0)(5,1)(6,2)(7,3)"                                  \
+				--stat-lcore 8                                               \
+				--no-lthread
+		;;
+
+	"1.4")
+		echo "1.3 1 L-core per pcore (N=16)"
+
+		./build/l3fwd-thread -c 3ffff -n 2 -- -P -p 3                          \
+				--enable-jumbo --max-pkt-len 1500                              \
+				--rx="(0,0,0,0)(0,1,1,1)(0,2,2,2)(0,3,3,3)(1,0,4,4)(1,1,5,5)(1,2,6,6)(1,3,7,7)" \
+				--tx="(8,0)(9,1)(10,2)(11,3)(12,4)(13,5)(14,6)(15,7)"          \
+				--stat-lcore 16                                                \
+				--no-lthread
+		;;
+
+
+	######################
+	# N L-core per pcore #
+	######################
+
+	"2.1")
+		echo "2.1 N L-core per pcore (N=2)"
+
+		./build/l3fwd-thread -c ff -n 2 --lcores="2,(0-1)@0" -- -P -p 3 \
+				--enable-jumbo --max-pkt-len 1500                       \
+				--rx="(0,0,0,0)(1,0,0,0)"                               \
+				--tx="(1,0)"                                            \
+				--stat-lcore 2                                          \
+				--no-lthread
+
+		;;
+
+	"2.2")
+		echo "2.2 N L-core per pcore (N=4)"
+
+		./build/l3fwd-thread -c ff -n 2 --lcores="(0-3)@0,4" -- -P -p 3 \
+				--enable-jumbo --max-pkt-len 1500  \
+				--rx="(0,0,0,0)(1,0,1,1)"          \
+				--tx="(2,0)(3,1)"                  \
+				--stat-lcore 4                     \
+				--no-lthread
+		;;
+
+	"2.3")
+		echo "2.3 N L-core per pcore (N=8)"
+
+		./build/l3fwd-thread -c 3ffff -n 2 --lcores="(0-7)@0,8" -- -P -p 3     \
+				--enable-jumbo --max-pkt-len 1500                              \
+				--rx="(0,0,0,0)(0,1,1,1)(1,0,2,2)(1,1,3,3)"                    \
+				--tx="(4,0)(5,1)(6,2)(7,3)"                                    \
+				--stat-lcore 8                                                 \
+				--no-lthread
+		;;
+
+	"2.4")
+		echo "2.3 N L-core per pcore (N=16)"
+
+		./build/l3fwd-thread -c 3ffff -n 2 --lcores="(0-15)@0,16" -- -P -p 3   \
+				--enable-jumbo --max-pkt-len 1500                              \
+				--rx="(0,0,0,0)(0,1,1,1)(0,2,2,2)(0,3,3,3)(1,0,4,4)(1,1,5,5)(1,2,6,6)(1,3,7,7)" \
+				--tx="(8,0)(9,1)(10,2)(11,3)(12,4)(13,5)(14,6)(15,7)"          \
+				--stat-lcore 16                                                \
+				--no-lthread
+		;;
+
+
+	#########################
+	# N L-threads per pcore #
+	#########################
+
+	"3.1")
+		echo "3.1 N L-threads per pcore (N=2)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3  \
+				--enable-jumbo --max-pkt-len 1500   \
+				--rx="(0,0,0,0)(1,0,0,0)"           \
+				--tx="(0,0)"                        \
+				--stat-lcore 1
+		;;
+
+	"3.2")
+		echo "3.2 N L-threads per pcore (N=4)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3  \
+				--enable-jumbo --max-pkt-len 1500   \
+				--rx="(0,0,0,0)(1,0,0,1)"           \
+				--tx="(0,0)(0,1)"                   \
+				--stat-lcore 1
+		;;
+
+	"3.3")
+		echo "3.2 N L-threads per pcore (N=8)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3                             \
+				--enable-jumbo --max-pkt-len 1500                              \
+				--rx="(0,0,0,0)(0,1,0,1)(1,0,0,2)(1,1,0,3)"                    \
+				--tx="(0,0)(0,1)(0,2)(0,3)"                                    \
+				--stat-lcore 1
+		;;
+
+	"3.4")
+		echo "3.2 N L-threads per pcore (N=16)"
+
+		./build/l3fwd-thread -c ff -n 2 -- -P -p 3                             \
+				--enable-jumbo --max-pkt-len 1500                              \
+				--rx="(0,0,0,0)(0,1,0,1)(0,2,0,2)(0,0,0,3)(1,0,0,4)(1,1,0,5)(1,2,0,6)(1,3,0,7)" \
+				--tx="(0,0)(0,1)(0,2)(0,3)(0,4)(0,5)(0,6)(0,7)"                \
+				--stat-lcore 1
+		;;
+
+esac
diff --git a/src/seastar/dpdk/examples/performance-thread/pthread_shim/Makefile b/src/seastar/dpdk/examples/performance-thread/pthread_shim/Makefile
new file mode 100644
index 00000000..86ac657c
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/pthread_shim/Makefile
@@ -0,0 +1,60 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2015 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = lthread_pthread_shim
+
+# all source are stored in SRCS-y
+SRCS-y := main.c  pthread_shim.c
+INCLUDES := -I$(RTE_SDK)/$(RTE_TARGET)/include -I$(SRCDIR)
+include $(RTE_SDK)/examples/performance-thread/common/common.mk
+
+CFLAGS += -g -O3 $(USER_FLAGS) $(INCLUDES)
+CFLAGS += $(WERROR_FLAGS)
+
+LDFLAGS += -lpthread
+
+# workaround for a gcc bug with noreturn attribute
+# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
+ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
+CFLAGS_main.o += -Wno-return-type
+endif
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/src/seastar/dpdk/examples/performance-thread/pthread_shim/main.c b/src/seastar/dpdk/examples/performance-thread/pthread_shim/main.c
new file mode 100644
index 00000000..850b009d
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/pthread_shim/main.c
@@ -0,0 +1,291 @@
+
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <sched.h>
+#include <pthread.h>
+
+#include <rte_common.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_timer.h>
+
+#include "lthread_api.h"
+#include "lthread_diag_api.h"
+#include "pthread_shim.h"
+
+#define DEBUG_APP 0
+#define HELLOW_WORLD_MAX_LTHREADS 10
+
+#ifndef __GLIBC__ /* sched_getcpu() is glibc-specific */
+#define sched_getcpu() rte_lcore_id()
+#endif
+
+__thread int print_count;
+__thread pthread_mutex_t print_lock;
+
+__thread pthread_mutex_t exit_lock;
+__thread pthread_cond_t exit_cond;
+
+/*
+ * A simple thread that demonstrates use of a mutex, a condition
+ * variable, thread local storage, explicit yield, and thread exit.
+ *
+ * The thread uses a mutex to protect a shared counter which is incremented
+ * and then it waits on condition variable before exiting.
+ *
+ * The thread argument is stored in and retrieved from TLS, using
+ * the pthread key create, get and set specific APIs.
+ *
+ * The thread yields while holding the mutex, to provide opportunity
+ * for other threads to contend.
+ *
+ * All of the pthread API functions used by this thread are actually
+ * resolved to corresponding lthread functions by the pthread shim
+ * implemented in pthread_shim.c
+ */
+void *helloworld_pthread(void *arg);
+void *helloworld_pthread(void *arg)
+{
+	pthread_key_t key;
+
+	/* create a key for TLS */
+	pthread_key_create(&key, NULL);
+
+	/* store the arg in TLS */
+	pthread_setspecific(key, arg);
+
+	/* grab lock and increment shared counter */
+	pthread_mutex_lock(&print_lock);
+	print_count++;
+
+	/* yield thread to give opportunity for lock contention */
+	pthread_yield();
+
+	/* retrieve arg from TLS */
+	uint64_t thread_no = (uint64_t) pthread_getspecific(key);
+
+	printf("Hello - lcore = %d count = %d thread_no = %d thread_id = %p\n",
+			sched_getcpu(),
+			print_count,
+			(int) thread_no,
+			(void *)pthread_self());
+
+	/* release the lock */
+	pthread_mutex_unlock(&print_lock);
+
+	/*
+	 * wait on condition variable
+	 * before exiting
+	 */
+	pthread_mutex_lock(&exit_lock);
+	pthread_cond_wait(&exit_cond, &exit_lock);
+	pthread_mutex_unlock(&exit_lock);
+
+	/* exit */
+	pthread_exit((void *) thread_no);
+}
+
+
+/*
+ * This is the initial thread
+ *
+ * It demonstrates pthread, mutex and condition variable creation,
+ * broadcast and pthread join APIs.
+ *
+ * This initial thread must always start life as an lthread.
+ *
+ * This thread creates many more threads then waits a short time
+ * before signalling them to exit using a broadcast.
+ *
+ * All of the pthread API functions used by this thread are actually
+ * resolved to corresponding lthread functions by the pthread shim
+ * implemented in pthread_shim.c
+ *
+ * After all threads have finished the lthread scheduler is shutdown
+ * and normal pthread operation is restored
+ */
+__thread pthread_t tid[HELLOW_WORLD_MAX_LTHREADS];
+
+static void initial_lthread(void *args);
+static void initial_lthread(void *args __attribute__((unused)))
+{
+	int lcore = (int) rte_lcore_id();
+	/*
+	 *
+	 * We can now enable pthread API override
+	 * and start to use the pthread APIs
+	 */
+	pthread_override_set(1);
+
+	uint64_t i;
+
+	/* initialize mutex for shared counter */
+	print_count = 0;
+	pthread_mutex_init(&print_lock, NULL);
+
+	/* initialize mutex and condition variable controlling thread exit */
+	pthread_mutex_init(&exit_lock, NULL);
+	pthread_cond_init(&exit_cond, NULL);
+
+	/* spawn a number of threads */
+	for (i = 0; i < HELLOW_WORLD_MAX_LTHREADS; i++) {
+
+		/*
+		 * Not strictly necessary but
+		 * for the sake of this example
+		 * use an attribute to pass the desired lcore
+		 */
+		pthread_attr_t attr;
+		rte_cpuset_t cpuset;
+
+		CPU_ZERO(&cpuset);
+		CPU_SET(lcore, &cpuset);
+		pthread_attr_init(&attr);
+		pthread_attr_setaffinity_np(&attr, sizeof(rte_cpuset_t), &cpuset);
+
+		/* create the thread */
+		pthread_create(&tid[i], &attr, helloworld_pthread, (void *) i);
+	}
+
+	/* wait for 1s to allow threads
+	 * to block on the condition variable
+	 * N.B. nanosleep() is resolved to lthread_sleep()
+	 * by the shim.
+	 */
+	struct timespec time;
+
+	time.tv_sec = 1;
+	time.tv_nsec = 0;
+	nanosleep(&time, NULL);
+
+	/* wake up all the threads */
+	pthread_cond_broadcast(&exit_cond);
+
+	/* wait for them to finish */
+	for (i = 0; i < HELLOW_WORLD_MAX_LTHREADS; i++) {
+
+		uint64_t thread_no;
+
+		pthread_join(tid[i], (void *) &thread_no);
+		if (thread_no != i)
+			printf("error on thread exit\n");
+	}
+
+	pthread_cond_destroy(&exit_cond);
+	pthread_mutex_destroy(&print_lock);
+	pthread_mutex_destroy(&exit_lock);
+
+	/* shutdown the lthread scheduler */
+	lthread_scheduler_shutdown(rte_lcore_id());
+	lthread_detach();
+}
+
+
+
+/* This thread creates a single initial lthread
+ * and then runs the scheduler
+ * An instance of this thread is created on each thread
+ * in the core mask
+ */
+static int
+lthread_scheduler(void *args);
+static int
+lthread_scheduler(void *args __attribute__((unused)))
+{
+	/* create initial thread  */
+	struct lthread *lt;
+
+	lthread_create(&lt, -1, initial_lthread, (void *) NULL);
+
+	/* run the lthread scheduler */
+	lthread_run();
+
+	/* restore genuine pthread operation */
+	pthread_override_set(0);
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int num_sched = 0;
+
+	/* basic DPDK initialization is all that is necessary to run lthreads*/
+	int ret = rte_eal_init(argc, argv);
+
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL parameters\n");
+
+	/* enable timer subsystem */
+	rte_timer_subsystem_init();
+
+#if DEBUG_APP
+	lthread_diagnostic_set_mask(LT_DIAG_ALL);
+#endif
+
+	/* create a scheduler on every core in the core mask
+	 * and launch an initial lthread that will spawn many more.
+	 */
+	unsigned lcore_id;
+
+	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+		if (rte_lcore_is_enabled(lcore_id))
+			num_sched++;
+	}
+
+	/* set the number of schedulers, this forces all schedulers synchronize
+	 * before entering their main loop
+	 */
+	lthread_num_schedulers_set(num_sched);
+
+	/* launch all threads */
+	rte_eal_mp_remote_launch(lthread_scheduler, (void *)NULL, CALL_MASTER);
+
+	/* wait for threads to stop */
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		rte_eal_wait_lcore(lcore_id);
+	}
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.c b/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.c
new file mode 100644
index 00000000..113bafa0
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.c
@@ -0,0 +1,746 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <errno.h>
+#define __USE_GNU
+#include <sched.h>
+#include <dlfcn.h>
+
+#include <rte_log.h>
+
+#include "lthread_api.h"
+#include "pthread_shim.h"
+
+#define RTE_LOGTYPE_PTHREAD_SHIM RTE_LOGTYPE_USER3
+
+#define POSIX_ERRNO(x)  (x)
+
+/* some releases of FreeBSD 10, e.g. 10.0, don't have CPU_COUNT macro */
+#ifndef CPU_COUNT
+#define CPU_COUNT(x) __cpu_count(x)
+
+static inline unsigned int
+__cpu_count(const rte_cpuset_t *cpuset)
+{
+	unsigned int i, count = 0;
+	for (i = 0; i < RTE_MAX_LCORE; i++)
+		if (CPU_ISSET(i, cpuset))
+			count++;
+	return count;
+}
+#endif
+
+/*
+ * this flag determines at run time if we override pthread
+ * calls and map then to equivalent lthread calls
+ * or of we call the standard pthread function
+ */
+static __thread int override;
+
+
+/*
+ * this structures contains function pointers that will be
+ * initialised to the loaded address of the real
+ * pthread library API functions
+ */
+struct pthread_lib_funcs {
+int (*f_pthread_barrier_destroy)
+	(pthread_barrier_t *);
+int (*f_pthread_barrier_init)
+	(pthread_barrier_t *, const pthread_barrierattr_t *, unsigned);
+int (*f_pthread_barrier_wait)
+	(pthread_barrier_t *);
+int (*f_pthread_cond_broadcast)
+	(pthread_cond_t *);
+int (*f_pthread_cond_destroy)
+	(pthread_cond_t *);
+int (*f_pthread_cond_init)
+	(pthread_cond_t *, const pthread_condattr_t *);
+int (*f_pthread_cond_signal)
+	(pthread_cond_t *);
+int (*f_pthread_cond_timedwait)
+	(pthread_cond_t *, pthread_mutex_t *, const struct timespec *);
+int (*f_pthread_cond_wait)
+	(pthread_cond_t *, pthread_mutex_t *);
+int (*f_pthread_create)
+	(pthread_t *, const pthread_attr_t *, void *(*)(void *), void *);
+int (*f_pthread_detach)
+	(pthread_t);
+int (*f_pthread_equal)
+	(pthread_t, pthread_t);
+void (*f_pthread_exit)
+	(void *);
+void * (*f_pthread_getspecific)
+	(pthread_key_t);
+int (*f_pthread_getcpuclockid)
+	(pthread_t, clockid_t *);
+int (*f_pthread_join)
+	(pthread_t, void **);
+int (*f_pthread_key_create)
+	(pthread_key_t *, void (*) (void *));
+int (*f_pthread_key_delete)
+	(pthread_key_t);
+int (*f_pthread_mutex_destroy)
+	(pthread_mutex_t *__mutex);
+int (*f_pthread_mutex_init)
+	(pthread_mutex_t *__mutex, const pthread_mutexattr_t *);
+int (*f_pthread_mutex_lock)
+	(pthread_mutex_t *__mutex);
+int (*f_pthread_mutex_trylock)
+	(pthread_mutex_t *__mutex);
+int (*f_pthread_mutex_timedlock)
+	(pthread_mutex_t *__mutex, const struct timespec *);
+int (*f_pthread_mutex_unlock)
+	(pthread_mutex_t *__mutex);
+int (*f_pthread_once)
+	(pthread_once_t *, void (*) (void));
+int (*f_pthread_rwlock_destroy)
+	(pthread_rwlock_t *__rwlock);
+int (*f_pthread_rwlock_init)
+	(pthread_rwlock_t *__rwlock, const pthread_rwlockattr_t *);
+int (*f_pthread_rwlock_rdlock)
+	(pthread_rwlock_t *__rwlock);
+int (*f_pthread_rwlock_timedrdlock)
+	(pthread_rwlock_t *__rwlock, const struct timespec *);
+int (*f_pthread_rwlock_timedwrlock)
+	(pthread_rwlock_t *__rwlock, const struct timespec *);
+int (*f_pthread_rwlock_tryrdlock)
+	(pthread_rwlock_t *__rwlock);
+int (*f_pthread_rwlock_trywrlock)
+	(pthread_rwlock_t *__rwlock);
+int (*f_pthread_rwlock_unlock)
+	(pthread_rwlock_t *__rwlock);
+int (*f_pthread_rwlock_wrlock)
+	(pthread_rwlock_t *__rwlock);
+pthread_t (*f_pthread_self)
+	(void);
+int (*f_pthread_setspecific)
+	(pthread_key_t, const void *);
+int (*f_pthread_spin_init)
+	(pthread_spinlock_t *__spin, int);
+int (*f_pthread_spin_destroy)
+	(pthread_spinlock_t *__spin);
+int (*f_pthread_spin_lock)
+	(pthread_spinlock_t *__spin);
+int (*f_pthread_spin_trylock)
+	(pthread_spinlock_t *__spin);
+int (*f_pthread_spin_unlock)
+	(pthread_spinlock_t *__spin);
+int (*f_pthread_cancel)
+	(pthread_t);
+int (*f_pthread_setcancelstate)
+	(int, int *);
+int (*f_pthread_setcanceltype)
+	(int, int *);
+void (*f_pthread_testcancel)
+	(void);
+int (*f_pthread_getschedparam)
+	(pthread_t pthread, int *, struct sched_param *);
+int (*f_pthread_setschedparam)
+	(pthread_t, int, const struct sched_param *);
+int (*f_pthread_yield)
+	(void);
+int (*f_pthread_setaffinity_np)
+	(pthread_t thread, size_t cpusetsize, const rte_cpuset_t *cpuset);
+int (*f_nanosleep)
+	(const struct timespec *req, struct timespec *rem);
+} _sys_pthread_funcs = {
+	.f_pthread_barrier_destroy = NULL,
+};
+
+
+/*
+ * this macro obtains the loaded address of a library function
+ * and saves it.
+ */
+static void *__libc_dl_handle = RTLD_NEXT;
+
+#define get_addr_of_loaded_symbol(name) do {				\
+	char *error_str;						\
+	_sys_pthread_funcs.f_##name = dlsym(__libc_dl_handle, (#name));	\
+	error_str = dlerror();						\
+	if (error_str != NULL) {					\
+		fprintf(stderr, "%s\n", error_str);			\
+	}								\
+} while (0)
+
+
+/*
+ * The constructor function initialises the
+ * function pointers for pthread library functions
+ */
+void
+pthread_intercept_ctor(void)__attribute__((constructor));
+void
+pthread_intercept_ctor(void)
+{
+	override = 0;
+	/*
+	 * Get the original functions
+	 */
+	get_addr_of_loaded_symbol(pthread_barrier_destroy);
+	get_addr_of_loaded_symbol(pthread_barrier_init);
+	get_addr_of_loaded_symbol(pthread_barrier_wait);
+	get_addr_of_loaded_symbol(pthread_cond_broadcast);
+	get_addr_of_loaded_symbol(pthread_cond_destroy);
+	get_addr_of_loaded_symbol(pthread_cond_init);
+	get_addr_of_loaded_symbol(pthread_cond_signal);
+	get_addr_of_loaded_symbol(pthread_cond_timedwait);
+	get_addr_of_loaded_symbol(pthread_cond_wait);
+	get_addr_of_loaded_symbol(pthread_create);
+	get_addr_of_loaded_symbol(pthread_detach);
+	get_addr_of_loaded_symbol(pthread_equal);
+	get_addr_of_loaded_symbol(pthread_exit);
+	get_addr_of_loaded_symbol(pthread_getspecific);
+	get_addr_of_loaded_symbol(pthread_getcpuclockid);
+	get_addr_of_loaded_symbol(pthread_join);
+	get_addr_of_loaded_symbol(pthread_key_create);
+	get_addr_of_loaded_symbol(pthread_key_delete);
+	get_addr_of_loaded_symbol(pthread_mutex_destroy);
+	get_addr_of_loaded_symbol(pthread_mutex_init);
+	get_addr_of_loaded_symbol(pthread_mutex_lock);
+	get_addr_of_loaded_symbol(pthread_mutex_trylock);
+	get_addr_of_loaded_symbol(pthread_mutex_timedlock);
+	get_addr_of_loaded_symbol(pthread_mutex_unlock);
+	get_addr_of_loaded_symbol(pthread_once);
+	get_addr_of_loaded_symbol(pthread_rwlock_destroy);
+	get_addr_of_loaded_symbol(pthread_rwlock_init);
+	get_addr_of_loaded_symbol(pthread_rwlock_rdlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_timedrdlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_timedwrlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_tryrdlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_trywrlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_unlock);
+	get_addr_of_loaded_symbol(pthread_rwlock_wrlock);
+	get_addr_of_loaded_symbol(pthread_self);
+	get_addr_of_loaded_symbol(pthread_setspecific);
+	get_addr_of_loaded_symbol(pthread_spin_init);
+	get_addr_of_loaded_symbol(pthread_spin_destroy);
+	get_addr_of_loaded_symbol(pthread_spin_lock);
+	get_addr_of_loaded_symbol(pthread_spin_trylock);
+	get_addr_of_loaded_symbol(pthread_spin_unlock);
+	get_addr_of_loaded_symbol(pthread_cancel);
+	get_addr_of_loaded_symbol(pthread_setcancelstate);
+	get_addr_of_loaded_symbol(pthread_setcanceltype);
+	get_addr_of_loaded_symbol(pthread_testcancel);
+	get_addr_of_loaded_symbol(pthread_getschedparam);
+	get_addr_of_loaded_symbol(pthread_setschedparam);
+	get_addr_of_loaded_symbol(pthread_yield);
+	get_addr_of_loaded_symbol(pthread_setaffinity_np);
+	get_addr_of_loaded_symbol(nanosleep);
+}
+
+
+/*
+ * Enable/Disable pthread override
+ * state
+ *  0 disable
+ *  1 enable
+ */
+void pthread_override_set(int state)
+{
+	override = state;
+}
+
+
+/*
+ * Return pthread override state
+ * return
+ *  0 disable
+ *  1 enable
+ */
+int pthread_override_get(void)
+{
+	return override;
+}
+
+/*
+ * This macro is used to catch and log
+ * invocation of stubs for unimplemented pthread
+ * API functions.
+ */
+#define NOT_IMPLEMENTED do {				\
+	if (override) {					\
+		RTE_LOG(WARNING,			\
+			PTHREAD_SHIM,			\
+			"WARNING %s NOT IMPLEMENTED\n",	\
+			__func__);			\
+	}						\
+} while (0)
+
+/*
+ * pthread API override functions follow
+ * Note in this example code only a subset of functions are
+ * implemented.
+ *
+ * The stub functions provided will issue a warning log
+ * message if an unimplemented function is invoked
+ *
+ */
+
+int pthread_barrier_destroy(pthread_barrier_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_barrier_destroy(a);
+}
+
+int
+pthread_barrier_init(pthread_barrier_t *a,
+		     const pthread_barrierattr_t *b, unsigned c)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_barrier_init(a, b, c);
+}
+
+int pthread_barrier_wait(pthread_barrier_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_barrier_wait(a);
+}
+
+int pthread_cond_broadcast(pthread_cond_t *cond)
+{
+	if (override) {
+
+		lthread_cond_broadcast(*(struct lthread_cond **)cond);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_cond_broadcast(cond);
+}
+
+int pthread_mutex_destroy(pthread_mutex_t *mutex)
+{
+	if (override)
+		return lthread_mutex_destroy(*(struct lthread_mutex **)mutex);
+	return _sys_pthread_funcs.f_pthread_mutex_destroy(mutex);
+}
+
+int pthread_cond_destroy(pthread_cond_t *cond)
+{
+	if (override)
+		return lthread_cond_destroy(*(struct lthread_cond **)cond);
+	return _sys_pthread_funcs.f_pthread_cond_destroy(cond);
+}
+
+int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
+{
+	if (override)
+		return lthread_cond_init(NULL,
+				(struct lthread_cond **)cond,
+				(const struct lthread_condattr *) attr);
+	return _sys_pthread_funcs.f_pthread_cond_init(cond, attr);
+}
+
+int pthread_cond_signal(pthread_cond_t *cond)
+{
+	if (override) {
+		lthread_cond_signal(*(struct lthread_cond **)cond);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_cond_signal(cond);
+}
+
+int
+pthread_cond_timedwait(pthread_cond_t *__restrict cond,
+		       pthread_mutex_t *__restrict mutex,
+		       const struct timespec *__restrict time)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_cond_timedwait(cond, mutex, time);
+}
+
+int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+	if (override) {
+		pthread_mutex_unlock(mutex);
+		int rv = lthread_cond_wait(*(struct lthread_cond **)cond, 0);
+
+		pthread_mutex_lock(mutex);
+		return rv;
+	}
+	return _sys_pthread_funcs.f_pthread_cond_wait(cond, mutex);
+}
+
+int
+pthread_create(pthread_t *__restrict tid,
+		const pthread_attr_t *__restrict attr,
+		void *(func) (void *),
+	       void *__restrict arg)
+{
+	if (override) {
+		int lcore = -1;
+
+		if (attr != NULL) {
+			/* determine CPU being requested */
+			rte_cpuset_t cpuset;
+
+			CPU_ZERO(&cpuset);
+			pthread_attr_getaffinity_np(attr,
+						sizeof(rte_cpuset_t),
+						&cpuset);
+
+			if (CPU_COUNT(&cpuset) != 1)
+				return POSIX_ERRNO(EINVAL);
+
+			for (lcore = 0; lcore < LTHREAD_MAX_LCORES; lcore++) {
+				if (!CPU_ISSET(lcore, &cpuset))
+					continue;
+				break;
+			}
+		}
+		return lthread_create((struct lthread **)tid, lcore,
+				      (void (*)(void *))func, arg);
+	}
+	return _sys_pthread_funcs.f_pthread_create(tid, attr, func, arg);
+}
+
+int pthread_detach(pthread_t tid)
+{
+	if (override) {
+		struct lthread *lt = (struct lthread *)tid;
+
+		if (lt == lthread_current()) {
+			lthread_detach();
+			return 0;
+		}
+		NOT_IMPLEMENTED;
+	}
+	return _sys_pthread_funcs.f_pthread_detach(tid);
+}
+
+int pthread_equal(pthread_t a, pthread_t b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_equal(a, b);
+}
+
+void pthread_exit_override(void *v)
+{
+	if (override) {
+		lthread_exit(v);
+		return;
+	}
+	_sys_pthread_funcs.f_pthread_exit(v);
+}
+
+void
+*pthread_getspecific(pthread_key_t key)
+{
+	if (override)
+		return lthread_getspecific((unsigned int) key);
+	return _sys_pthread_funcs.f_pthread_getspecific(key);
+}
+
+int pthread_getcpuclockid(pthread_t a, clockid_t *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_getcpuclockid(a, b);
+}
+
+int pthread_join(pthread_t tid, void **val)
+{
+	if (override)
+		return lthread_join((struct lthread *)tid, val);
+	return _sys_pthread_funcs.f_pthread_join(tid, val);
+}
+
+int pthread_key_create(pthread_key_t *keyptr, void (*dtor) (void *))
+{
+	if (override)
+		return lthread_key_create((unsigned int *)keyptr, dtor);
+	return _sys_pthread_funcs.f_pthread_key_create(keyptr, dtor);
+}
+
+int pthread_key_delete(pthread_key_t key)
+{
+	if (override) {
+		lthread_key_delete((unsigned int) key);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_key_delete(key);
+}
+
+
+int
+pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
+{
+	if (override)
+		return lthread_mutex_init(NULL,
+				(struct lthread_mutex **)mutex,
+				(const struct lthread_mutexattr *)attr);
+	return _sys_pthread_funcs.f_pthread_mutex_init(mutex, attr);
+}
+
+int pthread_mutex_lock(pthread_mutex_t *mutex)
+{
+	if (override)
+		return lthread_mutex_lock(*(struct lthread_mutex **)mutex);
+	return _sys_pthread_funcs.f_pthread_mutex_lock(mutex);
+}
+
+int pthread_mutex_trylock(pthread_mutex_t *mutex)
+{
+	if (override)
+		return lthread_mutex_trylock(*(struct lthread_mutex **)mutex);
+	return _sys_pthread_funcs.f_pthread_mutex_trylock(mutex);
+}
+
+int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_mutex_timedlock(mutex, b);
+}
+
+int pthread_mutex_unlock(pthread_mutex_t *mutex)
+{
+	if (override)
+		return lthread_mutex_unlock(*(struct lthread_mutex **)mutex);
+	return _sys_pthread_funcs.f_pthread_mutex_unlock(mutex);
+}
+
+int pthread_once(pthread_once_t *a, void (b) (void))
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_once(a, b);
+}
+
+int pthread_rwlock_destroy(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_destroy(a);
+}
+
+int pthread_rwlock_init(pthread_rwlock_t *a, const pthread_rwlockattr_t *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_init(a, b);
+}
+
+int pthread_rwlock_rdlock(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_rdlock(a);
+}
+
+int pthread_rwlock_timedrdlock(pthread_rwlock_t *a, const struct timespec *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_timedrdlock(a, b);
+}
+
+int pthread_rwlock_timedwrlock(pthread_rwlock_t *a, const struct timespec *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_timedwrlock(a, b);
+}
+
+int pthread_rwlock_tryrdlock(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_tryrdlock(a);
+}
+
+int pthread_rwlock_trywrlock(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_trywrlock(a);
+}
+
+int pthread_rwlock_unlock(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_unlock(a);
+}
+
+int pthread_rwlock_wrlock(pthread_rwlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_rwlock_wrlock(a);
+}
+
+#ifdef RTE_EXEC_ENV_LINUXAPP
+int
+pthread_yield(void)
+{
+	if (override) {
+		lthread_yield();
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_yield();
+}
+#else
+void
+pthread_yield(void)
+{
+	if (override)
+		lthread_yield();
+	else
+		_sys_pthread_funcs.f_pthread_yield();
+}
+#endif
+
+pthread_t pthread_self(void)
+{
+	if (override)
+		return (pthread_t) lthread_current();
+	return _sys_pthread_funcs.f_pthread_self();
+}
+
+int pthread_setspecific(pthread_key_t key, const void *data)
+{
+	if (override) {
+		int rv =  lthread_setspecific((unsigned int)key, data);
+		return rv;
+	}
+	return _sys_pthread_funcs.f_pthread_setspecific(key, data);
+}
+
+int pthread_spin_init(pthread_spinlock_t *a, int b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_spin_init(a, b);
+}
+
+int pthread_spin_destroy(pthread_spinlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_spin_destroy(a);
+}
+
+int pthread_spin_lock(pthread_spinlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_spin_lock(a);
+}
+
+int pthread_spin_trylock(pthread_spinlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_spin_trylock(a);
+}
+
+int pthread_spin_unlock(pthread_spinlock_t *a)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_spin_unlock(a);
+}
+
+int pthread_cancel(pthread_t tid)
+{
+	if (override) {
+		lthread_cancel(*(struct lthread **)tid);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_cancel(tid);
+}
+
+int pthread_setcancelstate(int a, int *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_setcancelstate(a, b);
+}
+
+int pthread_setcanceltype(int a, int *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_setcanceltype(a, b);
+}
+
+void pthread_testcancel(void)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_testcancel();
+}
+
+
+int pthread_getschedparam(pthread_t tid, int *a, struct sched_param *b)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_getschedparam(tid, a, b);
+}
+
+int pthread_setschedparam(pthread_t a, int b, const struct sched_param *c)
+{
+	NOT_IMPLEMENTED;
+	return _sys_pthread_funcs.f_pthread_setschedparam(a, b, c);
+}
+
+
+int nanosleep(const struct timespec *req, struct timespec *rem)
+{
+	if (override) {
+		uint64_t ns = req->tv_sec * 1000000000 + req->tv_nsec;
+
+		lthread_sleep(ns);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_nanosleep(req, rem);
+}
+
+int
+pthread_setaffinity_np(pthread_t thread, size_t cpusetsize,
+		       const rte_cpuset_t *cpuset)
+{
+	if (override) {
+		/* we only allow affinity with a single CPU */
+		if (CPU_COUNT(cpuset) != 1)
+			return POSIX_ERRNO(EINVAL);
+
+		/* we only allow the current thread to sets its own affinity */
+		struct lthread *lt = (struct lthread *)thread;
+
+		if (lthread_current() != lt)
+			return POSIX_ERRNO(EINVAL);
+
+		/* determine the CPU being requested */
+		int i;
+
+		for (i = 0; i < LTHREAD_MAX_LCORES; i++) {
+			if (!CPU_ISSET(i, cpuset))
+				continue;
+			break;
+		}
+		/* check requested core is allowed */
+		if (i == LTHREAD_MAX_LCORES)
+			return POSIX_ERRNO(EINVAL);
+
+		/* finally we can set affinity to the requested lcore */
+		lthread_set_affinity(i);
+		return 0;
+	}
+	return _sys_pthread_funcs.f_pthread_setaffinity_np(thread, cpusetsize,
+							   cpuset);
+}
diff --git a/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.h b/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.h
new file mode 100644
index 00000000..10f87894
--- /dev/null
+++ b/src/seastar/dpdk/examples/performance-thread/pthread_shim/pthread_shim.h
@@ -0,0 +1,114 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PTHREAD_SHIM_H_
+#define _PTHREAD_SHIM_H_
+
+#include <rte_lcore.h>
+
+/*
+ * This pthread shim is an example that demonstrates how legacy code
+ * that makes use of POSIX pthread services can make use of lthreads
+ * with reduced porting effort.
+ *
+ * N.B. The example is not a complete implementation, only a subset of
+ * pthread APIs sufficient to demonstrate the principle of operation
+ * are implemented.
+ *
+ * In general pthread attribute objects do not have equivalent functions
+ * in lthreads, and are ignored.
+ *
+ * There is one exception and that is the use of attr to specify a
+ * core affinity in calls to pthread_create.
+ *
+ * The shim operates as follows:-
+ *
+ * On initialisation a constructor function uses dlsym to obtain and
+ * save the loaded address of the full set of pthread APIs that will
+ * be overridden.
+ *
+ * For each function there is a stub provided that will invoke either
+ * the genuine pthread library function saved saved by the constructor,
+ * or else the corresponding equivalent lthread function.
+ *
+ * The stub functions are implemented in pthread_shim.c
+ *
+ * The stub will take care of adapting parameters, and any police
+ * any constraints where lthread functionality differs.
+ *
+ * The initial thread must always be a pure lthread.
+ *
+ * The decision whether to invoke the real library function or the lthread
+ * function is controlled by a per pthread flag that can be switched
+ * on of off by the pthread_override_set() API described below. Typcially
+ * this should be done as the first action of the initial lthread.
+ *
+ * N.B In general it would be poor practice to revert to invoke a real
+ * pthread function when running as an lthread, since these may block and
+ * effectively stall the lthread scheduler.
+ *
+ */
+
+
+/*
+ * An exiting lthread must not terminate the pthread it is running in
+ * since this would mean terminating the lthread scheduler.
+ * We override pthread_exit() with a macro because it is typically declared with
+ * __attribute__((noreturn))
+ */
+void pthread_exit_override(void *v);
+
+#define pthread_exit(v) do { \
+	pthread_exit_override((v));	\
+	return NULL;	\
+} while (0)
+
+/*
+ * Enable/Disable pthread override
+ * state
+ * 0 disable
+ * 1 enable
+ */
+void pthread_override_set(int state);
+
+
+/*
+ * Return pthread override state
+ * return
+ * 0 disable
+ * 1 enable
+ */
+int pthread_override_get(void);
+
+
+#endif /* _PTHREAD_SHIM_H_ */