1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2015 Intel Corporation
8 #include <rte_ethdev.h>
9 #include <rte_cycles.h>
10 #include <rte_lcore.h>
13 #define RX_RING_SIZE 1024
14 #define TX_RING_SIZE 1024
16 #define NUM_MBUFS 8191
17 #define MBUF_CACHE_SIZE 250
20 static const struct rte_eth_conf port_conf_default = {
22 .max_rx_pkt_len = ETHER_MAX_LEN,
27 uint64_t total_cycles;
33 add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
34 struct rte_mbuf **pkts, uint16_t nb_pkts,
35 uint16_t max_pkts __rte_unused, void *_ __rte_unused)
38 uint64_t now = rte_rdtsc();
40 for (i = 0; i < nb_pkts; i++)
41 pkts[i]->udata64 = now;
46 calc_latency(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
47 struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
50 uint64_t now = rte_rdtsc();
53 for (i = 0; i < nb_pkts; i++)
54 cycles += now - pkts[i]->udata64;
55 latency_numbers.total_cycles += cycles;
56 latency_numbers.total_pkts += nb_pkts;
58 if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
59 printf("Latency = %"PRIu64" cycles\n",
60 latency_numbers.total_cycles / latency_numbers.total_pkts);
61 latency_numbers.total_cycles = latency_numbers.total_pkts = 0;
67 * Initialises a given port using global settings and with the rx buffers
68 * coming from the mbuf_pool passed as parameter
71 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
73 struct rte_eth_conf port_conf = port_conf_default;
74 const uint16_t rx_rings = 1, tx_rings = 1;
75 uint16_t nb_rxd = RX_RING_SIZE;
76 uint16_t nb_txd = TX_RING_SIZE;
79 struct rte_eth_dev_info dev_info;
80 struct rte_eth_txconf txconf;
82 if (!rte_eth_dev_is_valid_port(port))
85 rte_eth_dev_info_get(port, &dev_info);
86 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
87 port_conf.txmode.offloads |=
88 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
90 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
94 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
98 for (q = 0; q < rx_rings; q++) {
99 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
100 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
105 txconf = dev_info.default_txconf;
106 txconf.offloads = port_conf.txmode.offloads;
107 for (q = 0; q < tx_rings; q++) {
108 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
109 rte_eth_dev_socket_id(port), &txconf);
114 retval = rte_eth_dev_start(port);
118 struct ether_addr addr;
120 rte_eth_macaddr_get(port, &addr);
121 printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
122 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
124 addr.addr_bytes[0], addr.addr_bytes[1],
125 addr.addr_bytes[2], addr.addr_bytes[3],
126 addr.addr_bytes[4], addr.addr_bytes[5]);
128 rte_eth_promiscuous_enable(port);
129 rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
130 rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
136 * Main thread that does the work, reading from INPUT_PORT
137 * and writing to OUTPUT_PORT
139 static __attribute__((noreturn)) void
144 RTE_ETH_FOREACH_DEV(port)
145 if (rte_eth_dev_socket_id(port) > 0 &&
146 rte_eth_dev_socket_id(port) !=
147 (int)rte_socket_id())
148 printf("WARNING, port %u is on remote NUMA node to "
149 "polling thread.\n\tPerformance will "
150 "not be optimal.\n", port);
152 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
155 RTE_ETH_FOREACH_DEV(port) {
156 struct rte_mbuf *bufs[BURST_SIZE];
157 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
159 if (unlikely(nb_rx == 0))
161 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
163 if (unlikely(nb_tx < nb_rx)) {
166 for (buf = nb_tx; buf < nb_rx; buf++)
167 rte_pktmbuf_free(bufs[buf]);
173 /* Main function, does initialisation and calls the per-lcore functions */
175 main(int argc, char *argv[])
177 struct rte_mempool *mbuf_pool;
182 int ret = rte_eal_init(argc, argv);
185 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
189 nb_ports = rte_eth_dev_count_avail();
190 if (nb_ports < 2 || (nb_ports & 1))
191 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
193 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
194 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
195 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
196 if (mbuf_pool == NULL)
197 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
199 /* initialize all ports */
200 RTE_ETH_FOREACH_DEV(portid)
201 if (port_init(portid, mbuf_pool) != 0)
202 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
205 if (rte_lcore_count() > 1)
206 printf("\nWARNING: Too much enabled lcores - "
207 "App uses only 1 lcore\n");
209 /* call lcore_main on master core only */