1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <stdio.h> 6 #include <stdlib.h> 7 #include <string.h> 8 #include <unistd.h> 9 #include <stdint.h> 10 #include <stdarg.h> 11 #include <inttypes.h> 12 #include <sys/queue.h> 13 #include <errno.h> 14 #include <signal.h> 15 16 #include <rte_common.h> 17 #include <rte_memory.h> 18 #include <rte_eal.h> 19 #include <rte_launch.h> 20 #include <rte_per_lcore.h> 21 #include <rte_lcore.h> 22 #include <rte_branch_prediction.h> 23 #include <rte_atomic.h> 24 #include <rte_ring.h> 25 #include <rte_log.h> 26 #include <rte_debug.h> 27 #include <rte_mempool.h> 28 #include <rte_memcpy.h> 29 #include <rte_mbuf.h> 30 #include <rte_ether.h> 31 #include <rte_interrupts.h> 32 #include <rte_ethdev.h> 33 #include <rte_byteorder.h> 34 #include <rte_malloc.h> 35 #include <rte_string_fns.h> 36 37 #include "common.h" 38 #include "args.h" 39 #include "init.h" 40 41 /* 42 * When doing reads from the NIC or the client queues, 43 * use this batch size 44 */ 45 #define PACKET_READ_SIZE 32 46 47 /* 48 * Local buffers to put packets in, used to send packets in bursts to the 49 * clients 50 */ 51 struct client_rx_buf { 52 struct rte_mbuf *buffer[PACKET_READ_SIZE]; 53 uint16_t count; 54 }; 55 56 /* One buffer per client rx queue - dynamically allocate array */ 57 static struct client_rx_buf *cl_rx_buf; 58 59 static const char * 60 get_printable_mac_addr(uint16_t port) 61 { 62 static const char err_address[] = "00:00:00:00:00:00"; 63 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; 64 int ret; 65 66 if (unlikely(port >= RTE_MAX_ETHPORTS)) 67 return err_address; 68 if (unlikely(addresses[port][0]=='\0')){ 69 struct rte_ether_addr mac; 70 ret = rte_eth_macaddr_get(port, &mac); 71 if (ret != 0) { 72 printf("Failed to get MAC address (port %u): %s\n", 73 port, rte_strerror(-ret)); 74 return err_address; 75 } 76 snprintf(addresses[port], sizeof(addresses[port]), 77 "%02x:%02x:%02x:%02x:%02x:%02x\n", 78 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2], 79 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]); 80 } 81 return addresses[port]; 82 } 83 84 /* 85 * This function displays the recorded statistics for each port 86 * and for each client. It uses ANSI terminal codes to clear 87 * screen when called. It is called from a single non-master 88 * thread in the server process, when the process is run with more 89 * than one lcore enabled. 90 */ 91 static void 92 do_stats_display(void) 93 { 94 unsigned i, j; 95 const char clr[] = { 27, '[', '2', 'J', '\0' }; 96 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' }; 97 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 98 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS]; 99 100 /* to get TX stats, we need to do some summing calculations */ 101 memset(port_tx, 0, sizeof(port_tx)); 102 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 103 memset(client_tx, 0, sizeof(client_tx)); 104 memset(client_tx_drop, 0, sizeof(client_tx_drop)); 105 106 for (i = 0; i < num_clients; i++){ 107 const volatile struct tx_stats *tx = &ports->tx_stats[i]; 108 for (j = 0; j < ports->num_ports; j++){ 109 /* assign to local variables here, save re-reading volatile vars */ 110 const uint64_t tx_val = tx->tx[ports->id[j]]; 111 const uint64_t drop_val = tx->tx_drop[ports->id[j]]; 112 port_tx[j] += tx_val; 113 port_tx_drop[j] += drop_val; 114 client_tx[i] += tx_val; 115 client_tx_drop[i] += drop_val; 116 } 117 } 118 119 /* Clear screen and move to top left */ 120 printf("%s%s", clr, topLeft); 121 122 printf("PORTS\n"); 123 printf("-----\n"); 124 for (i = 0; i < ports->num_ports; i++) 125 printf("Port %u: '%s'\t", (unsigned)ports->id[i], 126 get_printable_mac_addr(ports->id[i])); 127 printf("\n\n"); 128 for (i = 0; i < ports->num_ports; i++){ 129 printf("Port %u - rx: %9"PRIu64"\t" 130 "tx: %9"PRIu64"\n", 131 (unsigned)ports->id[i], ports->rx_stats.rx[i], 132 port_tx[i]); 133 } 134 135 printf("\nCLIENTS\n"); 136 printf("-------\n"); 137 for (i = 0; i < num_clients; i++){ 138 const unsigned long long rx = clients[i].stats.rx; 139 const unsigned long long rx_drop = clients[i].stats.rx_drop; 140 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n" 141 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n", 142 i, rx, rx_drop, client_tx[i], client_tx_drop[i]); 143 } 144 145 printf("\n"); 146 } 147 148 /* 149 * The function called from each non-master lcore used by the process. 150 * The test_and_set function is used to randomly pick a single lcore on which 151 * the code to display the statistics will run. Otherwise, the code just 152 * repeatedly sleeps. 153 */ 154 static int 155 sleep_lcore(__rte_unused void *dummy) 156 { 157 /* Used to pick a display thread - static, so zero-initialised */ 158 static rte_atomic32_t display_stats; 159 160 /* Only one core should display stats */ 161 if (rte_atomic32_test_and_set(&display_stats)) { 162 const unsigned sleeptime = 1; 163 printf("Core %u displaying statistics\n", rte_lcore_id()); 164 165 /* Longer initial pause so above printf is seen */ 166 sleep(sleeptime * 3); 167 168 /* Loop forever: sleep always returns 0 or <= param */ 169 while (sleep(sleeptime) <= sleeptime) 170 do_stats_display(); 171 } 172 return 0; 173 } 174 175 /* 176 * Function to set all the client statistic values to zero. 177 * Called at program startup. 178 */ 179 static void 180 clear_stats(void) 181 { 182 unsigned i; 183 184 for (i = 0; i < num_clients; i++) 185 clients[i].stats.rx = clients[i].stats.rx_drop = 0; 186 } 187 188 /* 189 * send a burst of traffic to a client, assuming there are packets 190 * available to be sent to this client 191 */ 192 static void 193 flush_rx_queue(uint16_t client) 194 { 195 uint16_t j; 196 struct client *cl; 197 198 if (cl_rx_buf[client].count == 0) 199 return; 200 201 cl = &clients[client]; 202 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer, 203 cl_rx_buf[client].count, NULL) == 0){ 204 for (j = 0; j < cl_rx_buf[client].count; j++) 205 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]); 206 cl->stats.rx_drop += cl_rx_buf[client].count; 207 } 208 else 209 cl->stats.rx += cl_rx_buf[client].count; 210 211 cl_rx_buf[client].count = 0; 212 } 213 214 /* 215 * marks a packet down to be sent to a particular client process 216 */ 217 static inline void 218 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf) 219 { 220 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf; 221 } 222 223 /* 224 * This function takes a group of packets and routes them 225 * individually to the client process. Very simply round-robins the packets 226 * without checking any of the packet contents. 227 */ 228 static void 229 process_packets(uint32_t port_num __rte_unused, 230 struct rte_mbuf *pkts[], uint16_t rx_count) 231 { 232 uint16_t i; 233 uint8_t client = 0; 234 235 for (i = 0; i < rx_count; i++) { 236 enqueue_rx_packet(client, pkts[i]); 237 238 if (++client == num_clients) 239 client = 0; 240 } 241 242 for (i = 0; i < num_clients; i++) 243 flush_rx_queue(i); 244 } 245 246 /* 247 * Function called by the master lcore of the DPDK process. 248 */ 249 static void 250 do_packet_forwarding(void) 251 { 252 unsigned port_num = 0; /* indexes the port[] array */ 253 254 for (;;) { 255 struct rte_mbuf *buf[PACKET_READ_SIZE]; 256 uint16_t rx_count; 257 258 /* read a port */ 259 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \ 260 buf, PACKET_READ_SIZE); 261 ports->rx_stats.rx[port_num] += rx_count; 262 263 /* Now process the NIC packets read */ 264 if (likely(rx_count > 0)) 265 process_packets(port_num, buf, rx_count); 266 267 /* move to next port */ 268 if (++port_num == ports->num_ports) 269 port_num = 0; 270 } 271 } 272 273 static void 274 signal_handler(int signal) 275 { 276 uint16_t port_id; 277 278 if (signal == SIGINT) 279 RTE_ETH_FOREACH_DEV(port_id) { 280 rte_eth_dev_stop(port_id); 281 rte_eth_dev_close(port_id); 282 } 283 exit(0); 284 } 285 286 int 287 main(int argc, char *argv[]) 288 { 289 signal(SIGINT, signal_handler); 290 /* initialise the system */ 291 if (init(argc, argv) < 0 ) 292 return -1; 293 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 294 295 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0])); 296 297 /* clear statistics */ 298 clear_stats(); 299 300 /* put all other cores to sleep bar master */ 301 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER); 302 303 do_packet_forwarding(); 304 return 0; 305 } 306