Adding upstream version 14.2.21.upstream/14.2.21upstream

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

6 files changed, 1308 insertions, 0 deletions

diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/Makefile b/src/seastar/dpdk/examples/l2fwd-keepalive/Makefile
new file mode 100644
index 00000000..ca45a798
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/Makefile
@@ -0,0 +1,51 @@
+#   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.
+
+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 = l2fwd-keepalive
+
+# all source are stored in SRCS-y
+SRCS-y := main.c shm.c
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+LDFLAGS += -lrt
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/Makefile b/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/Makefile
new file mode 100644
index 00000000..fd0c38b4
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/Makefile
@@ -0,0 +1,49 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2016 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(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 = ka-agent
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR)/../
+LDFLAGS += -lrt
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/main.c b/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/main.c
new file mode 100644
index 00000000..be1c7f49
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/ka-agent/main.c
@@ -0,0 +1,150 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 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.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/queue.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include <rte_keepalive.h>
+
+#include <shm.h>
+
+#define MAX_TIMEOUTS 4
+#define SEM_TIMEOUT_SECS 2
+
+static struct rte_keepalive_shm *ka_shm_create(void)
+{
+	int fd = shm_open(RTE_KEEPALIVE_SHM_NAME, O_RDWR, 0666);
+	size_t size = sizeof(struct rte_keepalive_shm);
+	struct rte_keepalive_shm *shm;
+
+	if (fd < 0)
+		printf("Failed to open %s as SHM:%s\n",
+			RTE_KEEPALIVE_SHM_NAME,
+		strerror(errno));
+	else {
+		shm = (struct rte_keepalive_shm *) mmap(
+			0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+		close(fd);
+		if (shm == MAP_FAILED)
+			printf("Failed to mmap SHM:%s\n", strerror(errno));
+		else
+			return shm;
+	}
+
+	/* Reset to zero, as it was set to MAP_FAILED aka: (void *)-1 */
+	shm = 0;
+	return NULL;
+}
+
+int main(void)
+{
+	struct rte_keepalive_shm *shm = ka_shm_create();
+	struct timespec timeout = { .tv_nsec = 0 };
+	int idx_core;
+	int cnt_cores;
+	uint64_t last_seen_alive_time = 0;
+	uint64_t most_recent_alive_time;
+	int cnt_timeouts = 0;
+	int sem_errno;
+
+	if (shm == NULL) {
+		printf("Unable to access shared core state\n");
+		return 1;
+	}
+	while (1) {
+		most_recent_alive_time = 0;
+		for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
+				idx_core++)
+			if (shm->core_last_seen_times[idx_core] >
+					most_recent_alive_time)
+				most_recent_alive_time =
+					shm->core_last_seen_times[idx_core];
+
+		timeout.tv_sec = time(NULL) + SEM_TIMEOUT_SECS;
+		if (sem_timedwait(&shm->core_died, &timeout) == -1) {
+			/* Assume no core death signals and no change in any
+			 * last-seen times is the keepalive monitor itself
+			 * failing.
+			 */
+			sem_errno = errno;
+			last_seen_alive_time = most_recent_alive_time;
+			if (sem_errno == ETIMEDOUT) {
+				if (last_seen_alive_time ==
+						most_recent_alive_time &&
+						cnt_timeouts++ >
+						MAX_TIMEOUTS) {
+					printf("No updates. Exiting..\n");
+					break;
+					}
+			} else
+				printf("sem_timedwait() error (%s)\n",
+					strerror(sem_errno));
+			continue;
+		}
+		cnt_timeouts = 0;
+
+		cnt_cores = 0;
+		for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
+				idx_core++)
+			if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
+				cnt_cores++;
+		if (cnt_cores == 0) {
+			/* Can happen if core was restarted since Semaphore
+			 * was sent, due to agent being offline.
+			 */
+			printf("Warning: Empty dead core report\n");
+			continue;
+		}
+
+		printf("%i dead cores: ", cnt_cores);
+		for (idx_core = 0;
+				idx_core < RTE_KEEPALIVE_MAXCORES;
+				idx_core++)
+			if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
+				printf("%d, ", idx_core);
+		printf("\b\b\n");
+	}
+	if (munmap(shm, sizeof(struct rte_keepalive_shm)) != 0)
+		printf("Warning: munmap() failed\n");
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/main.c b/src/seastar/dpdk/examples/l2fwd-keepalive/main.c
new file mode 100644
index 00000000..37453483
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/main.c
@@ -0,0 +1,819 @@
+/*-
+ *   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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <netinet/in.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_malloc.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_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_timer.h>
+#include <rte_keepalive.h>
+
+#include "shm.h"
+
+#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
+
+#define NB_MBUF   8192
+
+#define MAX_PKT_BURST 32
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+
+/*
+ * Configurable number of RX/TX ring descriptors
+ */
+#define RTE_TEST_RX_DESC_DEFAULT 128
+#define RTE_TEST_TX_DESC_DEFAULT 512
+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 struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];
+
+/* mask of enabled ports */
+static uint32_t l2fwd_enabled_port_mask;
+
+/* list of enabled ports */
+static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];
+
+static unsigned int l2fwd_rx_queue_per_lcore = 1;
+
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT 16
+struct lcore_queue_conf {
+	unsigned n_rx_port;
+	unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
+} __rte_cache_aligned;
+struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
+
+struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
+
+static const struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.split_hdr_size = 0,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 1, /**< CRC stripped by hardware */
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+struct rte_mempool *l2fwd_pktmbuf_pool = NULL;
+
+/* Per-port statistics struct */
+struct l2fwd_port_statistics {
+	uint64_t tx;
+	uint64_t rx;
+	uint64_t dropped;
+} __rte_cache_aligned;
+struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
+
+/* A tsc-based timer responsible for triggering statistics printout */
+#define TIMER_MILLISECOND 1
+#define MAX_TIMER_PERIOD 86400 /* 1 day max */
+static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000; /* 10 seconds */
+static int64_t check_period = 5; /* default check cycle is 5ms */
+
+/* Keepalive structure */
+struct rte_keepalive *rte_global_keepalive_info;
+
+/* Termination signalling */
+static int terminate_signal_received;
+
+/* Termination signal handler */
+static void handle_sigterm(__rte_unused int value)
+{
+	terminate_signal_received = 1;
+}
+
+/* Print out statistics on packets dropped */
+static void
+print_stats(__attribute__((unused)) struct rte_timer *ptr_timer,
+	__attribute__((unused)) void *ptr_data)
+{
+	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
+	unsigned portid;
+
+	total_packets_dropped = 0;
+	total_packets_tx = 0;
+	total_packets_rx = 0;
+
+	const char clr[] = { 27, '[', '2', 'J', '\0' };
+	const char topLeft[] = { 27, '[', '1', ';', '1', 'H', '\0' };
+
+		/* Clear screen and move to top left */
+	printf("%s%s", clr, topLeft);
+
+	printf("\nPort statistics ====================================");
+
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+		/* skip disabled ports */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+		printf("\nStatistics for port %u ------------------------------"
+			   "\nPackets sent: %24"PRIu64
+			   "\nPackets received: %20"PRIu64
+			   "\nPackets dropped: %21"PRIu64,
+			   portid,
+			   port_statistics[portid].tx,
+			   port_statistics[portid].rx,
+			   port_statistics[portid].dropped);
+
+		total_packets_dropped += port_statistics[portid].dropped;
+		total_packets_tx += port_statistics[portid].tx;
+		total_packets_rx += port_statistics[portid].rx;
+	}
+	printf("\nAggregate statistics ==============================="
+		   "\nTotal packets sent: %18"PRIu64
+		   "\nTotal packets received: %14"PRIu64
+		   "\nTotal packets dropped: %15"PRIu64,
+		   total_packets_tx,
+		   total_packets_rx,
+		   total_packets_dropped);
+	printf("\n====================================================\n");
+}
+
+static void
+l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
+{
+	struct ether_hdr *eth;
+	void *tmp;
+	int sent;
+	unsigned dst_port;
+	struct rte_eth_dev_tx_buffer *buffer;
+
+	dst_port = l2fwd_dst_ports[portid];
+	eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+	/* 02:00:00:00:00:xx */
+	tmp = &eth->d_addr.addr_bytes[0];
+	*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
+
+	/* src addr */
+	ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], &eth->s_addr);
+
+	buffer = tx_buffer[dst_port];
+	sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
+	if (sent)
+		port_statistics[dst_port].tx += sent;
+}
+
+/* main processing loop */
+static void
+l2fwd_main_loop(void)
+{
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct rte_mbuf *m;
+	int sent;
+	unsigned lcore_id;
+	uint64_t prev_tsc, diff_tsc, cur_tsc;
+	unsigned i, j, portid, nb_rx;
+	struct lcore_queue_conf *qconf;
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
+		/ US_PER_S * BURST_TX_DRAIN_US;
+	struct rte_eth_dev_tx_buffer *buffer;
+
+	prev_tsc = 0;
+
+	lcore_id = rte_lcore_id();
+	qconf = &lcore_queue_conf[lcore_id];
+
+	if (qconf->n_rx_port == 0) {
+		RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
+		return;
+	}
+
+	RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);
+
+	for (i = 0; i < qconf->n_rx_port; i++) {
+
+		portid = qconf->rx_port_list[i];
+		RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
+			portid);
+	}
+
+	uint64_t tsc_initial = rte_rdtsc();
+	uint64_t tsc_lifetime = (rand()&0x07) * rte_get_tsc_hz();
+
+	while (!terminate_signal_received) {
+		/* Keepalive heartbeat */
+		rte_keepalive_mark_alive(rte_global_keepalive_info);
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * Die randomly within 7 secs for demo purposes if
+		 * keepalive enabled
+		 */
+		if (check_period > 0 && cur_tsc - tsc_initial > tsc_lifetime)
+			break;
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			for (i = 0; i < qconf->n_rx_port; i++) {
+
+				portid = l2fwd_dst_ports[qconf->rx_port_list[i]];
+				buffer = tx_buffer[portid];
+
+				sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
+				if (sent)
+					port_statistics[portid].tx += sent;
+
+			}
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < qconf->n_rx_port; i++) {
+
+			portid = qconf->rx_port_list[i];
+			nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
+						 pkts_burst, MAX_PKT_BURST);
+
+			port_statistics[portid].rx += nb_rx;
+
+			for (j = 0; j < nb_rx; j++) {
+				m = pkts_burst[j];
+				rte_prefetch0(rte_pktmbuf_mtod(m, void *));
+				l2fwd_simple_forward(m, portid);
+			}
+		}
+	}
+}
+
+static int
+l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
+{
+	l2fwd_main_loop();
+	return 0;
+}
+
+/* display usage */
+static void
+l2fwd_usage(const char *prgname)
+{
+	printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
+	       "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
+	       "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
+	       "  -K PERIOD: Keepalive check period (5 default; 86400 max)\n"
+		   "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n",
+	       prgname);
+}
+
+static int
+l2fwd_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;
+}
+
+static unsigned int
+l2fwd_parse_nqueue(const char *q_arg)
+{
+	char *end = NULL;
+	unsigned long n;
+
+	/* parse hexadecimal string */
+	n = strtoul(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return 0;
+	if (n == 0)
+		return 0;
+	if (n >= MAX_RX_QUEUE_PER_LCORE)
+		return 0;
+
+	return n;
+}
+
+static int
+l2fwd_parse_timer_period(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n >= MAX_TIMER_PERIOD)
+		return -1;
+
+	return n;
+}
+
+static int
+l2fwd_parse_check_period(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n >= MAX_TIMER_PERIOD)
+		return -1;
+
+	return n;
+}
+
+/* Parse the argument given in the command line of the application */
+static int
+l2fwd_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = {
+		{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:q:T:K:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		/* portmask */
+		case 'p':
+			l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
+			if (l2fwd_enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* nqueue */
+		case 'q':
+			l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
+			if (l2fwd_rx_queue_per_lcore == 0) {
+				printf("invalid queue number\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* timer period */
+		case 'T':
+			timer_period = l2fwd_parse_timer_period(optarg)
+				* (int64_t)(1000 * TIMER_MILLISECOND);
+			if (timer_period < 0) {
+				printf("invalid timer period\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* Check period */
+		case 'K':
+			check_period = l2fwd_parse_check_period(optarg);
+			if (check_period < 0) {
+				printf("invalid check period\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* long options */
+		case 0:
+			l2fwd_usage(prgname);
+			return -1;
+
+		default:
+			l2fwd_usage(prgname);
+			return -1;
+		}
+	}
+
+	if (optind >= 0)
+		argv[optind-1] = prgname;
+
+	ret = optind-1;
+	optind = 1; /* reset getopt lib */
+	return ret;
+}
+
+/* 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");
+		}
+	}
+}
+
+static void
+dead_core(__rte_unused void *ptr_data, const int id_core)
+{
+	if (terminate_signal_received)
+		return;
+	printf("Dead core %i - restarting..\n", id_core);
+	if (rte_eal_get_lcore_state(id_core) == FINISHED) {
+		rte_eal_wait_lcore(id_core);
+		rte_eal_remote_launch(l2fwd_launch_one_lcore, NULL, id_core);
+	} else {
+		printf("..false positive!\n");
+	}
+}
+
+static void
+relay_core_state(void *ptr_data, const int id_core,
+	const enum rte_keepalive_state core_state, uint64_t last_alive)
+{
+	rte_keepalive_relayed_state((struct rte_keepalive_shm *)ptr_data,
+		id_core, core_state, last_alive);
+}
+
+int
+main(int argc, char **argv)
+{
+	struct lcore_queue_conf *qconf;
+	struct rte_eth_dev_info dev_info;
+	int ret;
+	uint8_t nb_ports;
+	uint8_t nb_ports_available;
+	uint8_t portid, last_port;
+	unsigned lcore_id, rx_lcore_id;
+	unsigned nb_ports_in_mask = 0;
+	struct sigaction signal_handler;
+	struct rte_keepalive_shm *ka_shm;
+
+	memset(&signal_handler, 0, sizeof(signal_handler));
+	terminate_signal_received = 0;
+	signal_handler.sa_handler = &handle_sigterm;
+	if (sigaction(SIGINT, &signal_handler, NULL) == -1 ||
+			sigaction(SIGTERM, &signal_handler, NULL) == -1)
+		rte_exit(EXIT_FAILURE, "SIGNAL\n");
+
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
+	argc -= ret;
+	argv += ret;
+
+	l2fwd_enabled_port_mask = 0;
+
+	/* parse application arguments (after the EAL ones) */
+	ret = l2fwd_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
+
+	/* create the mbuf pool */
+	l2fwd_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF, 32,
+		0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+	if (l2fwd_pktmbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
+
+	nb_ports = rte_eth_dev_count();
+	if (nb_ports == 0)
+		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+	/* reset l2fwd_dst_ports */
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
+		l2fwd_dst_ports[portid] = 0;
+	last_port = 0;
+
+	/*
+	 * Each logical core is assigned a dedicated TX queue on each port.
+	 */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		if (nb_ports_in_mask % 2) {
+			l2fwd_dst_ports[portid] = last_port;
+			l2fwd_dst_ports[last_port] = portid;
+		} else
+			last_port = portid;
+
+		nb_ports_in_mask++;
+
+		rte_eth_dev_info_get(portid, &dev_info);
+	}
+	if (nb_ports_in_mask % 2) {
+		printf("Notice: odd number of ports in portmask.\n");
+		l2fwd_dst_ports[last_port] = last_port;
+	}
+
+	rx_lcore_id = 1;
+	qconf = NULL;
+
+	/* Initialize the port/queue configuration of each logical core */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		/* get the lcore_id for this port */
+		while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
+		       lcore_queue_conf[rx_lcore_id].n_rx_port ==
+		       l2fwd_rx_queue_per_lcore) {
+			rx_lcore_id++;
+			if (rx_lcore_id >= RTE_MAX_LCORE)
+				rte_exit(EXIT_FAILURE, "Not enough cores\n");
+		}
+
+		if (qconf != &lcore_queue_conf[rx_lcore_id])
+			/* Assigned a new logical core in the loop above. */
+			qconf = &lcore_queue_conf[rx_lcore_id];
+
+		qconf->rx_port_list[qconf->n_rx_port] = portid;
+		qconf->n_rx_port++;
+		printf("Lcore %u: RX port %u\n",
+			rx_lcore_id, (unsigned) portid);
+	}
+
+	nb_ports_available = nb_ports;
+
+	/* Initialise each port */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
+			printf("Skipping disabled port %u\n",
+				(unsigned) portid);
+			nb_ports_available--;
+			continue;
+		}
+		/* init port */
+		printf("Initializing port %u... ", (unsigned) portid);
+		fflush(stdout);
+		ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				"Cannot configure device: err=%d, port=%u\n",
+				ret, (unsigned) portid);
+
+		rte_eth_macaddr_get(portid, &l2fwd_ports_eth_addr[portid]);
+
+		/* init one RX queue */
+		fflush(stdout);
+		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
+					     rte_eth_dev_socket_id(portid),
+					     NULL,
+					     l2fwd_pktmbuf_pool);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				"rte_eth_rx_queue_setup:err=%d, port=%u\n",
+				ret, (unsigned) portid);
+
+		/* init one TX queue on each port */
+		fflush(stdout);
+		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
+				rte_eth_dev_socket_id(portid),
+				NULL);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				"rte_eth_tx_queue_setup:err=%d, port=%u\n",
+				ret, (unsigned) portid);
+
+		/* Initialize TX buffers */
+		tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
+				RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
+				rte_eth_dev_socket_id(portid));
+		if (tx_buffer[portid] == NULL)
+			rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
+					(unsigned) portid);
+
+		rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);
+
+		ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
+				rte_eth_tx_buffer_count_callback,
+				&port_statistics[portid].dropped);
+		if (ret < 0)
+				rte_exit(EXIT_FAILURE, "Cannot set error callback for "
+						"tx buffer on port %u\n", (unsigned) portid);
+
+		/* Start device */
+		ret = rte_eth_dev_start(portid);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE,
+				"rte_eth_dev_start:err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		rte_eth_promiscuous_enable(portid);
+
+		printf("Port %u, MAC address: "
+			"%02X:%02X:%02X:%02X:%02X:%02X\n\n",
+			(unsigned) portid,
+			l2fwd_ports_eth_addr[portid].addr_bytes[0],
+			l2fwd_ports_eth_addr[portid].addr_bytes[1],
+			l2fwd_ports_eth_addr[portid].addr_bytes[2],
+			l2fwd_ports_eth_addr[portid].addr_bytes[3],
+			l2fwd_ports_eth_addr[portid].addr_bytes[4],
+			l2fwd_ports_eth_addr[portid].addr_bytes[5]);
+
+		/* initialize port stats */
+		memset(&port_statistics, 0, sizeof(port_statistics));
+	}
+
+	if (!nb_ports_available) {
+		rte_exit(EXIT_FAILURE,
+			"All available ports are disabled. Please set portmask.\n");
+	}
+
+	check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);
+
+	struct rte_timer hb_timer, stats_timer;
+
+	rte_timer_subsystem_init();
+	rte_timer_init(&stats_timer);
+
+	ka_shm = NULL;
+	if (check_period > 0) {
+		ka_shm = rte_keepalive_shm_create();
+		if (ka_shm == NULL)
+			rte_exit(EXIT_FAILURE,
+				"rte_keepalive_shm_create() failed");
+		rte_global_keepalive_info =
+			rte_keepalive_create(&dead_core, ka_shm);
+		if (rte_global_keepalive_info == NULL)
+			rte_exit(EXIT_FAILURE, "init_keep_alive() failed");
+		rte_keepalive_register_relay_callback(rte_global_keepalive_info,
+			relay_core_state, ka_shm);
+		rte_timer_init(&hb_timer);
+		if (rte_timer_reset(&hb_timer,
+				(check_period * rte_get_timer_hz()) / 1000,
+				PERIODICAL,
+				rte_lcore_id(),
+				(void(*)(struct rte_timer*, void*))
+				&rte_keepalive_dispatch_pings,
+				rte_global_keepalive_info
+				) != 0 )
+			rte_exit(EXIT_FAILURE, "Keepalive setup failure.\n");
+	}
+	if (timer_period > 0) {
+		if (rte_timer_reset(&stats_timer,
+				(timer_period * rte_get_timer_hz()) / 1000,
+				PERIODICAL,
+				rte_lcore_id(),
+				&print_stats, NULL
+				) != 0 )
+			rte_exit(EXIT_FAILURE, "Stats setup failure.\n");
+	}
+	/* launch per-lcore init on every slave lcore */
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		struct lcore_queue_conf *qconf = &lcore_queue_conf[lcore_id];
+
+		if (qconf->n_rx_port == 0)
+			RTE_LOG(INFO, L2FWD,
+				"lcore %u has nothing to do\n",
+				lcore_id
+				);
+		else {
+			rte_eal_remote_launch(
+				l2fwd_launch_one_lcore,
+				NULL,
+				lcore_id
+				);
+			rte_keepalive_register_core(rte_global_keepalive_info,
+				lcore_id);
+		}
+	}
+	while (!terminate_signal_received) {
+		rte_timer_manage();
+		rte_delay_ms(5);
+		}
+
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		if (rte_eal_wait_lcore(lcore_id) < 0)
+			return -1;
+	}
+
+	if (ka_shm != NULL)
+		rte_keepalive_shm_cleanup(ka_shm);
+	return 0;
+}
diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/shm.c b/src/seastar/dpdk/examples/l2fwd-keepalive/shm.c
new file mode 100644
index 00000000..fbf5bd79
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/shm.c
@@ -0,0 +1,141 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 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.
+ */
+
+#include <time.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_keepalive.h>
+
+#include "shm.h"
+
+struct rte_keepalive_shm *rte_keepalive_shm_create(void)
+{
+	int fd;
+	int idx_core;
+	struct rte_keepalive_shm *ka_shm;
+
+	/* If any existing object is not unlinked, it makes it all too easy
+	 * for clients to end up with stale shared memory blocks when
+	 * restarted. Unlinking makes sure subsequent shm_open by clients
+	 * will get the new block mapped below.
+	 */
+	if (shm_unlink(RTE_KEEPALIVE_SHM_NAME) == -1 && errno != ENOENT)
+		printf("Warning: Error unlinking stale %s (%s)\n",
+			RTE_KEEPALIVE_SHM_NAME, strerror(errno));
+
+	fd = shm_open(RTE_KEEPALIVE_SHM_NAME,
+		O_CREAT | O_TRUNC | O_RDWR, 0666);
+	if (fd < 0)
+		RTE_LOG(INFO, EAL,
+			"Failed to open %s as SHM (%s)\n",
+			RTE_KEEPALIVE_SHM_NAME,
+			strerror(errno));
+	else if (ftruncate(fd, sizeof(struct rte_keepalive_shm)) != 0)
+		RTE_LOG(INFO, EAL,
+			"Failed to resize SHM (%s)\n", strerror(errno));
+	else {
+		ka_shm = (struct rte_keepalive_shm *) mmap(
+			0, sizeof(struct rte_keepalive_shm),
+			PROT_READ | PROT_WRITE,	MAP_SHARED, fd, 0);
+		close(fd);
+		if (ka_shm == MAP_FAILED)
+			RTE_LOG(INFO, EAL,
+				"Failed to mmap SHM (%s)\n", strerror(errno));
+		else {
+			memset(ka_shm, 0, sizeof(struct rte_keepalive_shm));
+
+			/* Initialize the semaphores for IPC/SHM use */
+			if (sem_init(&ka_shm->core_died, 1, 0) != 0) {
+				RTE_LOG(INFO, EAL,
+					"Failed to setup SHM semaphore (%s)\n",
+					strerror(errno));
+				munmap(ka_shm,
+					sizeof(struct rte_keepalive_shm));
+				return NULL;
+			}
+
+			/* Set all cores to 'not present' */
+			for (idx_core = 0;
+					idx_core < RTE_KEEPALIVE_MAXCORES;
+					idx_core++) {
+				ka_shm->core_state[idx_core] =
+					RTE_KA_STATE_UNUSED;
+				ka_shm->core_last_seen_times[idx_core] = 0;
+			}
+
+			return ka_shm;
+		}
+	}
+return NULL;
+}
+
+void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
+	const int id_core, const enum rte_keepalive_state core_state,
+	__rte_unused uint64_t last_alive)
+{
+	int count;
+
+	shm->core_state[id_core] = core_state;
+	shm->core_last_seen_times[id_core] = last_alive;
+
+	if (core_state == RTE_KEEPALIVE_SHM_DEAD) {
+		/* Since core has died, also signal ka_agent.
+		 *
+		 * Limit number of times semaphore can be incremented, in case
+		 * ka_agent is not active.
+		 */
+		if (sem_getvalue(&shm->core_died, &count) == -1) {
+			RTE_LOG(INFO, EAL, "Semaphore check failed(%s)\n",
+				strerror(errno));
+			return;
+		}
+		if (count > 1)
+			return;
+
+		if (sem_post(&shm->core_died) != 0)
+			RTE_LOG(INFO, EAL,
+				"Failed to increment semaphore (%s)\n",
+				strerror(errno));
+	}
+}
+
+void rte_keepalive_shm_cleanup(struct rte_keepalive_shm *ka_shm)
+{
+	if (shm_unlink(RTE_KEEPALIVE_SHM_NAME) == -1 && errno != ENOENT)
+		printf("Warning: Error unlinking  %s (%s)\n",
+			RTE_KEEPALIVE_SHM_NAME, strerror(errno));
+
+	if (ka_shm && munmap(ka_shm, sizeof(struct rte_keepalive_shm)) != 0)
+		printf("Warning: munmap() failed\n");
+}
diff --git a/src/seastar/dpdk/examples/l2fwd-keepalive/shm.h b/src/seastar/dpdk/examples/l2fwd-keepalive/shm.h
new file mode 100644
index 00000000..66a60600
--- /dev/null
+++ b/src/seastar/dpdk/examples/l2fwd-keepalive/shm.h
@@ -0,0 +1,98 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 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 RTE_KEEPALIVE_SHM_NAME "/dpdk_keepalive_shm_name"
+
+#define RTE_KEEPALIVE_SHM_ALIVE 1
+#define RTE_KEEPALIVE_SHM_DEAD 2
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <semaphore.h>
+#include <rte_keepalive.h>
+
+/**
+ * Keepalive SHM structure.
+ *
+ * The shared memory allocated by the primary is this size, and contains the
+ * information as contained within this struct. A secondary may open the SHM,
+ * and read the contents.
+ */
+struct rte_keepalive_shm {
+	/** IPC semaphore. Posted when a core dies */
+	sem_t core_died;
+
+	/**
+	 * Relayed status of each core.
+	 */
+	enum rte_keepalive_state core_state[RTE_KEEPALIVE_MAXCORES];
+
+	/**
+	 * Last-seen-alive timestamps for the cores
+	 */
+	uint64_t core_last_seen_times[RTE_KEEPALIVE_MAXCORES];
+};
+
+/**
+ * Create shared host memory keepalive object.
+ * @return
+ *  Pointer to SHM keepalive structure, or NULL on failure.
+ */
+struct rte_keepalive_shm *rte_keepalive_shm_create(void);
+
+/**
+ * Relays state for given core
+ * @param *shm
+ *  Pointer to SHM keepalive structure.
+ * @param id_core
+ *  Id of core
+ * @param core_state
+ *  State of core
+ * @param last_alive
+ *  Last seen timestamp for core
+ */
+void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
+	const int id_core, const enum rte_keepalive_state core_state,
+	uint64_t last_alive);
+
+/** Shutdown cleanup of shared host memory keepalive object.
+ * @param *shm
+ *  Pointer to SHM keepalive structure. May be NULL.
+ *
+ *  If *shm is NULL, this function will only attempt to remove the
+ *  shared host memory handle and not unmap the underlying memory.
+ */
+void rte_keepalive_shm_cleanup(struct rte_keepalive_shm *ka_shm);