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37 #include <rte_ethdev.h>
38 #include <rte_cycles.h>
39 #include <rte_lcore.h>
42 #define RX_RING_SIZE 128
43 #define TX_RING_SIZE 512
45 #define NUM_MBUFS 8191
46 #define MBUF_SIZE (1600 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
47 #define MBUF_CACHE_SIZE 250
50 static const struct rte_eth_conf port_conf_default = {
51 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN, },
54 static unsigned nb_ports;
57 uint64_t total_cycles;
63 add_timestamps(uint8_t port __rte_unused, uint16_t qidx __rte_unused,
64 struct rte_mbuf **pkts, uint16_t nb_pkts,
65 uint16_t max_pkts __rte_unused, void *_ __rte_unused)
68 uint64_t now = rte_rdtsc();
70 for (i = 0; i < nb_pkts; i++)
71 pkts[i]->udata64 = now;
76 calc_latency(uint8_t port __rte_unused, uint16_t qidx __rte_unused,
77 struct rte_mbuf **pkts, uint16_t nb_pkts, void *_ __rte_unused)
80 uint64_t now = rte_rdtsc();
83 for (i = 0; i < nb_pkts; i++)
84 cycles += now - pkts[i]->udata64;
85 latency_numbers.total_cycles += cycles;
86 latency_numbers.total_pkts += nb_pkts;
88 if (latency_numbers.total_pkts > (100 * 1000 * 1000ULL)) {
89 printf("Latency = %"PRIu64" cycles\n",
90 latency_numbers.total_cycles / latency_numbers.total_pkts);
91 latency_numbers.total_cycles = latency_numbers.total_pkts = 0;
97 * Initialises a given port using global settings and with the rx buffers
98 * coming from the mbuf_pool passed as parameter
101 port_init(uint8_t port, struct rte_mempool *mbuf_pool)
103 struct rte_eth_conf port_conf = port_conf_default;
104 const uint16_t rx_rings = 1, tx_rings = 1;
108 if (port >= rte_eth_dev_count())
111 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
115 for (q = 0; q < rx_rings; q++) {
116 retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
117 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
122 for (q = 0; q < tx_rings; q++) {
123 retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
124 rte_eth_dev_socket_id(port), NULL);
129 retval = rte_eth_dev_start(port);
133 struct ether_addr addr;
135 rte_eth_macaddr_get(port, &addr);
136 printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
137 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
139 addr.addr_bytes[0], addr.addr_bytes[1],
140 addr.addr_bytes[2], addr.addr_bytes[3],
141 addr.addr_bytes[4], addr.addr_bytes[5]);
143 rte_eth_promiscuous_enable(port);
144 rte_eth_add_rx_callback(port, 0, add_timestamps, NULL);
145 rte_eth_add_tx_callback(port, 0, calc_latency, NULL);
151 * Main thread that does the work, reading from INPUT_PORT
152 * and writing to OUTPUT_PORT
154 static __attribute__((noreturn)) void
159 for (port = 0; port < nb_ports; port++)
160 if (rte_eth_dev_socket_id(port) > 0 &&
161 rte_eth_dev_socket_id(port) !=
162 (int)rte_socket_id())
163 printf("WARNING, port %u is on remote NUMA node to "
164 "polling thread.\n\tPerformance will "
165 "not be optimal.\n", port);
167 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
170 for (port = 0; port < nb_ports; port++) {
171 struct rte_mbuf *bufs[BURST_SIZE];
172 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
174 if (unlikely(nb_rx == 0))
176 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
178 if (unlikely(nb_tx < nb_rx)) {
181 for (buf = nb_tx; buf < nb_rx; buf++)
182 rte_pktmbuf_free(bufs[buf]);
188 /* Main function, does initialisation and calls the per-lcore functions */
190 main(int argc, char *argv[])
192 struct rte_mempool *mbuf_pool;
196 int ret = rte_eal_init(argc, argv);
199 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
203 nb_ports = rte_eth_dev_count();
204 if (nb_ports < 2 || (nb_ports & 1))
205 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
207 mbuf_pool = rte_mempool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
208 MBUF_SIZE, MBUF_CACHE_SIZE,
209 sizeof(struct rte_pktmbuf_pool_private),
210 rte_pktmbuf_pool_init, NULL,
211 rte_pktmbuf_init, NULL,
213 if (mbuf_pool == NULL)
214 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
216 /* initialize all ports */
217 for (portid = 0; portid < nb_ports; portid++)
218 if (port_init(portid, mbuf_pool) != 0)
219 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8"\n",
222 if (rte_lcore_count() > 1)
223 printf("\nWARNING: Too much enabled lcores - "
224 "App uses only 1 lcore\n");
226 /* call lcore_main on master core only */