diff options
Diffstat (limited to 'src/spdk/dpdk/examples/rxtx_callbacks')
| -rw-r--r-- | src/spdk/dpdk/examples/rxtx_callbacks/Makefile | 62 | ||||
| -rw-r--r-- | src/spdk/dpdk/examples/rxtx_callbacks/main.c | 212 | ||||
| -rw-r--r-- | src/spdk/dpdk/examples/rxtx_callbacks/meson.build | 11 |
3 files changed, 285 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/rxtx_callbacks/Makefile b/src/spdk/dpdk/examples/rxtx_callbacks/Makefile new file mode 100644 index 00000000..e9d30d56 --- /dev/null +++ b/src/spdk/dpdk/examples/rxtx_callbacks/Makefile @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: BSD-3-Clause +# Copyright(c) 2010-2015 Intel Corporation + +# binary name +APP = rxtx_callbacks + +# all source are stored in SRCS-y +SRCS-y := main.c + +# Build using pkg-config variables if possible +$(shell pkg-config --exists libdpdk) +ifeq ($(.SHELLSTATUS),0) + +all: shared +.PHONY: shared static +shared: build/$(APP)-shared + ln -sf $(APP)-shared build/$(APP) +static: build/$(APP)-static + ln -sf $(APP)-static build/$(APP) + +PC_FILE := $(shell pkg-config --path libdpdk) +CFLAGS += -O3 $(shell pkg-config --cflags libdpdk) +LDFLAGS_SHARED = $(shell pkg-config --libs libdpdk) +LDFLAGS_STATIC = -Wl,-Bstatic $(shell pkg-config --static --libs libdpdk) + +build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build + $(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED) + +build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build + $(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC) + +build: + @mkdir -p $@ + +.PHONY: clean +clean: + rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared + rmdir --ignore-fail-on-non-empty build + +else # Build using legacy build system + +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 + +CFLAGS += $(WERROR_FLAGS) + +# workaround for a gcc bug with noreturn attribute +# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603 +ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y) +CFLAGS_main.o += -Wno-return-type +endif + +EXTRA_CFLAGS += -O3 -g -Wfatal-errors + +include $(RTE_SDK)/mk/rte.extapp.mk +endif diff --git a/src/spdk/dpdk/examples/rxtx_callbacks/main.c b/src/spdk/dpdk/examples/rxtx_callbacks/main.c new file mode 100644 index 00000000..2058be62 --- /dev/null +++ b/src/spdk/dpdk/examples/rxtx_callbacks/main.c @@ -0,0 +1,212 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2010-2015 Intel Corporation + */ + +#include <stdint.h> +#include <inttypes.h> +#include <rte_eal.h> +#include <rte_ethdev.h> +#include <rte_cycles.h> +#include <rte_lcore.h> +#include <rte_mbuf.h> + +#define RX_RING_SIZE 1024 +#define TX_RING_SIZE 1024 + +#define NUM_MBUFS 8191 +#define MBUF_CACHE_SIZE 250 +#define BURST_SIZE 32 + +static const struct rte_eth_conf port_conf_default = { + .rxmode = { + .max_rx_pkt_len = ETHER_MAX_LEN, + }, +}; + +static struct { + uint64_t total_cycles; + uint64_t total_pkts; +} latency_numbers; + + +static uint16_t +add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused, + struct rte_mbuf **pkts, uint16_t nb_pkts, + uint16_t max_pkts __rte_unused, void *_ __rte_unused) +{ + unsigned i; + uint64_t now = rte_rdtsc(); + + for (i = 0; i < nb_pkts; i++) + pkts[i]->udata64 = now; + return nb_pkts; +} + +static uint16_t +calc_latency(uint16_t port __rte_unused, uint16_t qidx __rte_unused, + struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused) +{ + uint64_t cycles = 0; + uint64_t now = rte_rdtsc(); + unsigned i; + + for (i = 0; i < nb_pkts; i++) + cycles += now - pkts[i]->udata64; + latency_numbers.total_cycles += cycles; + latency_numbers.total_pkts += nb_pkts; + + if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) { + printf("Latency = %"PRIu64" cycles\n", + latency_numbers.total_cycles / latency_numbers.total_pkts); + latency_numbers.total_cycles = latency_numbers.total_pkts = 0; + } + return nb_pkts; +} + +/* + * Initialises a given port using global settings and with the rx buffers + * coming from the mbuf_pool passed as parameter + */ +static inline int +port_init(uint16_t port, struct rte_mempool *mbuf_pool) +{ + struct rte_eth_conf port_conf = port_conf_default; + const uint16_t rx_rings = 1, tx_rings = 1; + uint16_t nb_rxd = RX_RING_SIZE; + uint16_t nb_txd = TX_RING_SIZE; + int retval; + uint16_t q; + struct rte_eth_dev_info dev_info; + struct rte_eth_txconf txconf; + + if (!rte_eth_dev_is_valid_port(port)) + return -1; + + rte_eth_dev_info_get(port, &dev_info); + if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) + port_conf.txmode.offloads |= + DEV_TX_OFFLOAD_MBUF_FAST_FREE; + + retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); + if (retval != 0) + return retval; + + retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd); + if (retval != 0) + return retval; + + for (q = 0; q < rx_rings; q++) { + retval = rte_eth_rx_queue_setup(port, q, nb_rxd, + rte_eth_dev_socket_id(port), NULL, mbuf_pool); + if (retval < 0) + return retval; + } + + txconf = dev_info.default_txconf; + txconf.offloads = port_conf.txmode.offloads; + for (q = 0; q < tx_rings; q++) { + retval = rte_eth_tx_queue_setup(port, q, nb_txd, + rte_eth_dev_socket_id(port), &txconf); + if (retval < 0) + return retval; + } + + retval = rte_eth_dev_start(port); + if (retval < 0) + return retval; + + struct ether_addr addr; + + rte_eth_macaddr_get(port, &addr); + printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8 + " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n", + (unsigned)port, + addr.addr_bytes[0], addr.addr_bytes[1], + addr.addr_bytes[2], addr.addr_bytes[3], + addr.addr_bytes[4], addr.addr_bytes[5]); + + rte_eth_promiscuous_enable(port); + rte_eth_add_rx_callback(port, 0, add_timestamps, NULL); + rte_eth_add_tx_callback(port, 0, calc_latency, NULL); + + return 0; +} + +/* + * Main thread that does the work, reading from INPUT_PORT + * and writing to OUTPUT_PORT + */ +static __attribute__((noreturn)) void +lcore_main(void) +{ + uint16_t port; + + RTE_ETH_FOREACH_DEV(port) + if (rte_eth_dev_socket_id(port) > 0 && + rte_eth_dev_socket_id(port) != + (int)rte_socket_id()) + printf("WARNING, port %u is on remote NUMA node to " + "polling thread.\n\tPerformance will " + "not be optimal.\n", port); + + printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n", + rte_lcore_id()); + for (;;) { + RTE_ETH_FOREACH_DEV(port) { + struct rte_mbuf *bufs[BURST_SIZE]; + const uint16_t nb_rx = rte_eth_rx_burst(port, 0, + bufs, BURST_SIZE); + if (unlikely(nb_rx == 0)) + continue; + const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0, + bufs, nb_rx); + if (unlikely(nb_tx < nb_rx)) { + uint16_t buf; + + for (buf = nb_tx; buf < nb_rx; buf++) + rte_pktmbuf_free(bufs[buf]); + } + } + } +} + +/* Main function, does initialisation and calls the per-lcore functions */ +int +main(int argc, char *argv[]) +{ + struct rte_mempool *mbuf_pool; + uint16_t nb_ports; + uint16_t portid; + + /* init EAL */ + int ret = rte_eal_init(argc, argv); + + if (ret < 0) + rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); + argc -= ret; + argv += ret; + + nb_ports = rte_eth_dev_count_avail(); + if (nb_ports < 2 || (nb_ports & 1)) + rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n"); + + mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", + NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0, + RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id()); + if (mbuf_pool == NULL) + rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); + + /* initialize all ports */ + RTE_ETH_FOREACH_DEV(portid) + if (port_init(portid, mbuf_pool) != 0) + rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n", + portid); + + if (rte_lcore_count() > 1) + printf("\nWARNING: Too much enabled lcores - " + "App uses only 1 lcore\n"); + + /* call lcore_main on master core only */ + lcore_main(); + return 0; +} diff --git a/src/spdk/dpdk/examples/rxtx_callbacks/meson.build b/src/spdk/dpdk/examples/rxtx_callbacks/meson.build new file mode 100644 index 00000000..c34e11e3 --- /dev/null +++ b/src/spdk/dpdk/examples/rxtx_callbacks/meson.build @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: BSD-3-Clause +# Copyright(c) 2017 Intel Corporation + +# meson file, for building this example as part of a main DPDK build. +# +# To build this example as a standalone application with an already-installed +# DPDK instance, use 'make' + +sources = files( + 'main.c' +) |