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,
27 static unsigned nb_ports;
30 uint64_t total_cycles;
36 add_timestamps(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
37 struct rte_mbuf **pkts, uint16_t nb_pkts,
38 uint16_t max_pkts __rte_unused, void *_ __rte_unused)
41 uint64_t now = rte_rdtsc();
43 for (i = 0; i < nb_pkts; i++)
44 pkts[i]->udata64 = now;
49 calc_latency(uint16_t port __rte_unused, uint16_t qidx __rte_unused,
50 struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
53 uint64_t now = rte_rdtsc();
56 for (i = 0; i < nb_pkts; i++)
57 cycles += now - pkts[i]->udata64;
58 latency_numbers.total_cycles += cycles;
59 latency_numbers.total_pkts += nb_pkts;
61 if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
62 printf("Latency = %"PRIu64" cycles\n",
63 latency_numbers.total_cycles / latency_numbers.total_pkts);
64 latency_numbers.total_cycles = latency_numbers.total_pkts = 0;
70 * Initialises a given port using global settings and with the rx buffers
71 * coming from the mbuf_pool passed as parameter
74 port_init(uint16_t port, struct rte_mempool *mbuf_pool)
76 struct rte_eth_conf port_conf = port_conf_default;
77 const uint16_t rx_rings = 1, tx_rings = 1;
78 uint16_t nb_rxd = RX_RING_SIZE;
79 uint16_t nb_txd = TX_RING_SIZE;
82 struct rte_eth_dev_info dev_info;
83 struct rte_eth_txconf txconf;
85 if (port >= rte_eth_dev_count())
88 rte_eth_dev_info_get(port, &dev_info);
89 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
90 port_conf.txmode.offloads |=
91 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
93 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
97 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &nb_rxd, &nb_txd);
101 for (q = 0; q < rx_rings; q++) {
102 retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
103 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
108 txconf = dev_info.default_txconf;
109 txconf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
110 txconf.offloads = port_conf.txmode.offloads;
111 for (q = 0; q < tx_rings; q++) {
112 retval = rte_eth_tx_queue_setup(port, q, nb_txd,
113 rte_eth_dev_socket_id(port), &txconf);
118 retval = rte_eth_dev_start(port);
122 struct ether_addr addr;
124 rte_eth_macaddr_get(port, &addr);
125 printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
126 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
128 addr.addr_bytes[0], addr.addr_bytes[1],
129 addr.addr_bytes[2], addr.addr_bytes[3],
130 addr.addr_bytes[4], addr.addr_bytes[5]);
132 rte_eth_promiscuous_enable(port);
133 rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
134 rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
140 * Main thread that does the work, reading from INPUT_PORT
141 * and writing to OUTPUT_PORT
143 static __attribute__((noreturn)) void
148 for (port = 0; port < nb_ports; port++)
149 if (rte_eth_dev_socket_id(port) > 0 &&
150 rte_eth_dev_socket_id(port) !=
151 (int)rte_socket_id())
152 printf("WARNING, port %u is on remote NUMA node to "
153 "polling thread.\n\tPerformance will "
154 "not be optimal.\n", port);
156 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
159 for (port = 0; port < nb_ports; port++) {
160 struct rte_mbuf *bufs[BURST_SIZE];
161 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
163 if (unlikely(nb_rx == 0))
165 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
167 if (unlikely(nb_tx < nb_rx)) {
170 for (buf = nb_tx; buf < nb_rx; buf++)
171 rte_pktmbuf_free(bufs[buf]);
177 /* Main function, does initialisation and calls the per-lcore functions */
179 main(int argc, char *argv[])
181 struct rte_mempool *mbuf_pool;
185 int ret = rte_eal_init(argc, argv);
188 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
192 nb_ports = rte_eth_dev_count();
193 if (nb_ports < 2 || (nb_ports & 1))
194 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
196 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
197 NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
198 RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
199 if (mbuf_pool == NULL)
200 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
202 /* initialize all ports */
203 for (portid = 0; portid < nb_ports; portid++)
204 if (port_init(portid, mbuf_pool) != 0)
205 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
208 if (rte_lcore_count() > 1)
209 printf("\nWARNING: Too much enabled lcores - "
210 "App uses only 1 lcore\n");
212 /* call lcore_main on master core only */