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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_CACHE_SIZE 250
49 static const struct rte_eth_conf port_conf_default = {
50 .rxmode = { .max_rx_pkt_len = ETHER_MAX_LEN }
53 /* basicfwd.c: Basic DPDK skeleton forwarding example. */
56 * Initializes a given port using global settings and with the RX buffers
57 * coming from the mbuf_pool passed as a parameter.
60 port_init(uint8_t port, struct rte_mempool *mbuf_pool)
62 struct rte_eth_conf port_conf = port_conf_default;
63 const uint16_t rx_rings = 1, tx_rings = 1;
67 if (port >= rte_eth_dev_count())
70 /* Configure the Ethernet device. */
71 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
75 /* Allocate and set up 1 RX queue per Ethernet port. */
76 for (q = 0; q < rx_rings; q++) {
77 retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
78 rte_eth_dev_socket_id(port), NULL, mbuf_pool);
83 /* Allocate and set up 1 TX queue per Ethernet port. */
84 for (q = 0; q < tx_rings; q++) {
85 retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
86 rte_eth_dev_socket_id(port), NULL);
91 /* Start the Ethernet port. */
92 retval = rte_eth_dev_start(port);
96 /* Display the port MAC address. */
97 struct ether_addr addr;
98 rte_eth_macaddr_get(port, &addr);
99 printf("Port %u MAC: %02" PRIx8 " %02" PRIx8 " %02" PRIx8
100 " %02" PRIx8 " %02" PRIx8 " %02" PRIx8 "\n",
102 addr.addr_bytes[0], addr.addr_bytes[1],
103 addr.addr_bytes[2], addr.addr_bytes[3],
104 addr.addr_bytes[4], addr.addr_bytes[5]);
106 /* Enable RX in promiscuous mode for the Ethernet device. */
107 rte_eth_promiscuous_enable(port);
113 * The lcore main. This is the main thread that does the work, reading from
114 * an input port and writing to an output port.
116 static __attribute__((noreturn)) void
119 const uint8_t nb_ports = rte_eth_dev_count();
123 * Check that the port is on the same NUMA node as the polling thread
124 * for best performance.
126 for (port = 0; port < nb_ports; port++)
127 if (rte_eth_dev_socket_id(port) > 0 &&
128 rte_eth_dev_socket_id(port) !=
129 (int)rte_socket_id())
130 printf("WARNING, port %u is on remote NUMA node to "
131 "polling thread.\n\tPerformance will "
132 "not be optimal.\n", port);
134 printf("\nCore %u forwarding packets. [Ctrl+C to quit]\n",
137 /* Run until the application is quit or killed. */
140 * Receive packets on a port and forward them on the paired
141 * port. The mapping is 0 -> 1, 1 -> 0, 2 -> 3, 3 -> 2, etc.
143 for (port = 0; port < nb_ports; port++) {
145 /* Get burst of RX packets, from first port of pair. */
146 struct rte_mbuf *bufs[BURST_SIZE];
147 const uint16_t nb_rx = rte_eth_rx_burst(port, 0,
150 if (unlikely(nb_rx == 0))
153 /* Send burst of TX packets, to second port of pair. */
154 const uint16_t nb_tx = rte_eth_tx_burst(port ^ 1, 0,
157 /* Free any unsent packets. */
158 if (unlikely(nb_tx < nb_rx)) {
160 for (buf = nb_tx; buf < nb_rx; buf++)
161 rte_pktmbuf_free(bufs[buf]);
168 * The main function, which does initialization and calls the per-lcore
172 main(int argc, char *argv[])
174 struct rte_mempool *mbuf_pool;
178 /* Initialize the Environment Abstraction Layer (EAL). */
179 int ret = rte_eal_init(argc, argv);
181 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
186 /* Check that there is an even number of ports to send/receive on. */
187 nb_ports = rte_eth_dev_count();
188 if (nb_ports < 2 || (nb_ports & 1))
189 rte_exit(EXIT_FAILURE, "Error: number of ports must be even\n");
191 /* Creates a new mempool in memory to hold the mbufs. */
192 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * nb_ports,
193 MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
195 if (mbuf_pool == NULL)
196 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
198 /* Initialize all ports. */
199 for (portid = 0; portid < nb_ports; portid++)
200 if (port_init(portid, mbuf_pool) != 0)
201 rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8 "\n",
204 if (rte_lcore_count() > 1)
205 printf("\nWARNING: Too many lcores enabled. Only 1 used.\n");
207 /* Call lcore_main on the master core only. */