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,
23 .ignore_offload_bitfield = 1,
28 uint64_t total_cycles;
34 add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
35 struct rte_mbuf **pkts, uint16_t nb_pkts,
36 uint16_t max_pkts __rte_unused, void *_ __rte_unused)
39 uint64_t now = rte_rdtsc();
41 for (i = 0; i < nb_pkts; i++)
42 pkts[i]->udata64 = now;
47 calc_latency(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
48 struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
51 uint64_t now = rte_rdtsc();
54 for (i = 0; i < nb_pkts; i++)
55 cycles += now - pkts[i]->udata64;
56 latency_numbers.total_cycles += cycles;
57 latency_numbers.total_pkts += nb_pkts;
59 if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
60 printf("Latency = %"PRIu64" cycles\n",
61 latency_numbers.total_cycles / latency_numbers.total_pkts);
62 latency_numbers.total_cycles = latency_numbers.total_pkts = 0;
68 * Initialises a given port using global settings and with the rx buffers
69 * coming from the mbuf_pool passed as parameter
72 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
74 struct rte_eth_conf port_conf = port_conf_default;
75 const uint16_t rx_rings = 1, tx_rings = 1;
76 uint16_t nb_rxd = RX_RING_SIZE;
77 uint16_t nb_txd = TX_RING_SIZE;
80 struct rte_eth_dev_info dev_info;
81 struct rte_eth_txconf txconf;
83 if (!rte_eth_dev_is_valid_port(port))
86 rte_eth_dev_info_get(port, &dev_info);
87 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
88 port_conf.txmode.offloads |=
89 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
91 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
95 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
99 for (q = 0; q < rx_rings; q++) {
100 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
101 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
106 txconf = dev_info.default_txconf;
107 txconf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
108 txconf.offloads = port_conf.txmode.offloads;
109 for (q = 0; q < tx_rings; q++) {
110 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
111 rte_eth_dev_socket_id(port), &txconf);
116 retval = rte_eth_dev_start(port);
120 struct ether_addr addr;
122 rte_eth_macaddr_get(port, &addr);
123 printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
124 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
126 addr.addr_bytes[0], addr.addr_bytes[1],
127 addr.addr_bytes[2], addr.addr_bytes[3],
128 addr.addr_bytes[4], addr.addr_bytes[5]);
130 rte_eth_promiscuous_enable(port);
131 rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
132 rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
138 * Main thread that does the work, reading from INPUT_PORT
139 * and writing to OUTPUT_PORT
141 static __attribute__((noreturn)) void
146 RTE_ETH_FOREACH_DEV(port)
147 if (rte_eth_dev_socket_id(port) > 0 &&
148 rte_eth_dev_socket_id(port) !=
149 (int)rte_socket_id())
150 printf("WARNING, port %u is on remote NUMA node to "
151 "polling thread.\n\tPerformance will "
152 "not be optimal.\n", port);
154 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
157 RTE_ETH_FOREACH_DEV(port) {
158 struct rte_mbuf *bufs[BURST_SIZE];
159 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
161 if (unlikely(nb_rx == 0))
163 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
165 if (unlikely(nb_tx < nb_rx)) {
168 for (buf = nb_tx; buf < nb_rx; buf++)
169 rte_pktmbuf_free(bufs[buf]);
175 /* Main function, does initialisation and calls the per-lcore functions */
177 main(int argc, char *argv[])
179 struct rte_mempool *mbuf_pool;
184 int ret = rte_eal_init(argc, argv);
187 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
191 nb_ports = rte_eth_dev_count_avail();
192 if (nb_ports < 2 || (nb_ports & 1))
193 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
195 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
196 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
197 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
198 if (mbuf_pool == NULL)
199 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
201 /* initialize all ports */
202 RTE_ETH_FOREACH_DEV(portid)
203 if (port_init(portid, mbuf_pool) != 0)
204 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
207 if (rte_lcore_count() > 1)
208 printf("\nWARNING: Too much enabled lcores - "
209 "App uses only 1 lcore\n");
211 /* call lcore_main on master core only */