1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2015 Intel Corporation
9 #include <rte_ethdev.h>
10 #include <rte_cycles.h>
11 #include <rte_lcore.h>
14 #define RX_RING_SIZE 1024
15 #define TX_RING_SIZE 1024
17 #define NUM_MBUFS 8191
18 #define MBUF_CACHE_SIZE 250
21 static const char usage[] =
22 "%s EAL_ARGS -- [-t]\n";
24 static const struct rte_eth_conf port_conf_default = {
26 .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
31 uint64_t total_cycles;
32 uint64_t total_queue_cycles;
38 #define TICKS_PER_CYCLE_SHIFT 16
39 static uint64_t ticks_per_cycle_mult;
42 add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
43 struct rte_mbuf **pkts, uint16_t nb_pkts,
44 uint16_t max_pkts __rte_unused, void *_ __rte_unused)
47 uint64_t now = rte_rdtsc();
49 for (i = 0; i < nb_pkts; i++)
50 pkts[i]->udata64 = now;
55 calc_latency(uint16_t port, uint16_t qidx __rte_unused,
56 struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
59 uint64_t queue_ticks = 0;
60 uint64_t now = rte_rdtsc();
65 rte_eth_read_clock(port, &ticks);
67 for (i = 0; i < nb_pkts; i++) {
68 cycles += now - pkts[i]->udata64;
70 queue_ticks += ticks - pkts[i]->timestamp;
73 latency_numbers.total_cycles += cycles;
75 latency_numbers.total_queue_cycles += (queue_ticks
76 * ticks_per_cycle_mult) >> TICKS_PER_CYCLE_SHIFT;
78 latency_numbers.total_pkts += nb_pkts;
80 if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
81 printf("Latency = %"PRIu64" cycles\n",
82 latency_numbers.total_cycles / latency_numbers.total_pkts);
83 if (hw_timestamping) {
84 printf("Latency from HW = %"PRIu64" cycles\n",
85 latency_numbers.total_queue_cycles
86 / latency_numbers.total_pkts);
88 latency_numbers.total_cycles = 0;
89 latency_numbers.total_queue_cycles = 0;
90 latency_numbers.total_pkts = 0;
96 * Initialises a given port using global settings and with the rx buffers
97 * coming from the mbuf_pool passed as parameter
100 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
102 struct rte_eth_conf port_conf = port_conf_default;
103 const uint16_t rx_rings = 1, tx_rings = 1;
104 uint16_t nb_rxd = RX_RING_SIZE;
105 uint16_t nb_txd = TX_RING_SIZE;
108 struct rte_eth_dev_info dev_info;
109 struct rte_eth_rxconf rxconf;
110 struct rte_eth_txconf txconf;
112 if (!rte_eth_dev_is_valid_port(port))
115 retval = rte_eth_dev_info_get(port, &dev_info);
117 printf("Error during getting device (port %u) info: %s\n",
118 port, strerror(-retval));
123 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
124 port_conf.txmode.offloads |=
125 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
127 if (hw_timestamping) {
128 if (!(dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TIMESTAMP)) {
129 printf("\nERROR: Port %u does not support hardware timestamping\n"
133 port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_TIMESTAMP;
136 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
140 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
144 rxconf = dev_info.default_rxconf;
146 for (q = 0; q < rx_rings; q++) {
147 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
148 rte_eth_dev_socket_id(port), &rxconf, mbuf_pool);
153 txconf = dev_info.default_txconf;
154 txconf.offloads = port_conf.txmode.offloads;
155 for (q = 0; q < tx_rings; q++) {
156 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
157 rte_eth_dev_socket_id(port), &txconf);
162 retval = rte_eth_dev_start(port);
166 if (hw_timestamping && ticks_per_cycle_mult == 0) {
167 uint64_t cycles_base = rte_rdtsc();
169 retval = rte_eth_read_clock(port, &ticks_base);
173 uint64_t cycles = rte_rdtsc();
175 rte_eth_read_clock(port, &ticks);
176 uint64_t c_freq = cycles - cycles_base;
177 uint64_t t_freq = ticks - ticks_base;
178 double freq_mult = (double)c_freq / t_freq;
179 printf("TSC Freq ~= %" PRIu64
180 "\nHW Freq ~= %" PRIu64
182 c_freq * 10, t_freq * 10, freq_mult);
183 /* TSC will be faster than internal ticks so freq_mult is > 0
184 * We convert the multiplication to an integer shift & mult
186 ticks_per_cycle_mult = (1 << TICKS_PER_CYCLE_SHIFT) / freq_mult;
189 struct rte_ether_addr addr;
191 retval = rte_eth_macaddr_get(port, &addr);
193 printf("Failed to get MAC address on port %u: %s\n",
194 port, rte_strerror(-retval));
197 printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
198 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
200 addr.addr_bytes[0], addr.addr_bytes[1],
201 addr.addr_bytes[2], addr.addr_bytes[3],
202 addr.addr_bytes[4], addr.addr_bytes[5]);
204 retval = rte_eth_promiscuous_enable(port);
208 rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
209 rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
215 * Main thread that does the work, reading from INPUT_PORT
216 * and writing to OUTPUT_PORT
218 static __rte_noreturn void
223 RTE_ETH_FOREACH_DEV(port)
224 if (rte_eth_dev_socket_id(port) > 0 &&
225 rte_eth_dev_socket_id(port) !=
226 (int)rte_socket_id())
227 printf("WARNING, port %u is on remote NUMA node to "
228 "polling thread.\n\tPerformance will "
229 "not be optimal.\n", port);
231 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
234 RTE_ETH_FOREACH_DEV(port) {
235 struct rte_mbuf *bufs[BURST_SIZE];
236 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
238 if (unlikely(nb_rx == 0))
240 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
242 if (unlikely(nb_tx < nb_rx)) {
245 for (buf = nb_tx; buf < nb_rx; buf++)
246 rte_pktmbuf_free(bufs[buf]);
252 /* Main function, does initialisation and calls the per-lcore functions */
254 main(int argc, char *argv[])
256 struct rte_mempool *mbuf_pool;
259 struct option lgopts[] = {
262 int opt, option_index;
266 int ret = rte_eal_init(argc, argv);
269 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
273 while ((opt = getopt_long(argc, argv, "t", lgopts, &option_index))
280 printf(usage, argv[0]);
283 optind = 1; /* reset getopt lib */
285 nb_ports = rte_eth_dev_count_avail();
286 if (nb_ports < 2 || (nb_ports & 1))
287 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
289 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
290 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
291 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
292 if (mbuf_pool == NULL)
293 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
295 /* initialize all ports */
296 RTE_ETH_FOREACH_DEV(portid)
297 if (port_init(portid, mbuf_pool) != 0)
298 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
301 if (rte_lcore_count() > 1)
302 printf("\nWARNING: Too much enabled lcores - "
303 "App uses only 1 lcore\n");
305 /* call lcore_main on master core only */