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 struct rte_ether_addr null_mac; /* static defaults to 0 */ 63 static char err_address[32]; 64 static char addresses[RTE_MAX_ETHPORTS][32]; 65 int ret; 66 67 if (unlikely(port >= RTE_MAX_ETHPORTS)) { 68 if (err_address[0] == '\0') 69 rte_ether_format_addr(err_address, 70 sizeof(err_address), &null_mac); 71 return err_address; 72 } 73 if (unlikely(addresses[port][0]=='\0')){ 74 struct rte_ether_addr mac; 75 ret = rte_eth_macaddr_get(port, &mac); 76 if (ret != 0) { 77 printf("Failed to get MAC address (port %u): %s\n", 78 port, rte_strerror(-ret)); 79 return err_address; 80 } 81 rte_ether_format_addr(addresses[port], 82 sizeof(addresses[port]), &mac); 83 } 84 return addresses[port]; 85 } 86 87 /* 88 * This function displays the recorded statistics for each port 89 * and for each client. It uses ANSI terminal codes to clear 90 * screen when called. It is called from a single worker 91 * thread in the server process, when the process is run with more 92 * than one lcore enabled. 93 */ 94 static void 95 do_stats_display(void) 96 { 97 unsigned i, j; 98 const char clr[] = { 27, '[', '2', 'J', '\0' }; 99 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' }; 100 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 101 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS]; 102 103 /* to get TX stats, we need to do some summing calculations */ 104 memset(port_tx, 0, sizeof(port_tx)); 105 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 106 memset(client_tx, 0, sizeof(client_tx)); 107 memset(client_tx_drop, 0, sizeof(client_tx_drop)); 108 109 for (i = 0; i < num_clients; i++){ 110 const volatile struct tx_stats *tx = &ports->tx_stats[i]; 111 for (j = 0; j < ports->num_ports; j++){ 112 /* assign to local variables here, save re-reading volatile vars */ 113 const uint64_t tx_val = tx->tx[ports->id[j]]; 114 const uint64_t drop_val = tx->tx_drop[ports->id[j]]; 115 port_tx[j] += tx_val; 116 port_tx_drop[j] += drop_val; 117 client_tx[i] += tx_val; 118 client_tx_drop[i] += drop_val; 119 } 120 } 121 122 /* Clear screen and move to top left */ 123 printf("%s%s", clr, topLeft); 124 125 printf("PORTS\n"); 126 printf("-----\n"); 127 for (i = 0; i < ports->num_ports; i++) 128 printf("Port %u: '%s'\t", (unsigned)ports->id[i], 129 get_printable_mac_addr(ports->id[i])); 130 printf("\n\n"); 131 for (i = 0; i < ports->num_ports; i++){ 132 printf("Port %u - rx: %9"PRIu64"\t" 133 "tx: %9"PRIu64"\n", 134 (unsigned)ports->id[i], ports->rx_stats.rx[i], 135 port_tx[i]); 136 } 137 138 printf("\nCLIENTS\n"); 139 printf("-------\n"); 140 for (i = 0; i < num_clients; i++){ 141 const unsigned long long rx = clients[i].stats.rx; 142 const unsigned long long rx_drop = clients[i].stats.rx_drop; 143 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n" 144 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n", 145 i, rx, rx_drop, client_tx[i], client_tx_drop[i]); 146 } 147 148 printf("\n"); 149 } 150 151 /* 152 * The function called from each worker lcore used by the process. 153 * The test_and_set function is used to randomly pick a single lcore on which 154 * the code to display the statistics will run. Otherwise, the code just 155 * repeatedly sleeps. 156 */ 157 static int 158 sleep_lcore(__rte_unused void *dummy) 159 { 160 /* Used to pick a display thread - static, so zero-initialised */ 161 static rte_atomic32_t display_stats; 162 163 /* Only one core should display stats */ 164 if (rte_atomic32_test_and_set(&display_stats)) { 165 const unsigned sleeptime = 1; 166 printf("Core %u displaying statistics\n", rte_lcore_id()); 167 168 /* Longer initial pause so above printf is seen */ 169 sleep(sleeptime * 3); 170 171 /* Loop forever: sleep always returns 0 or <= param */ 172 while (sleep(sleeptime) <= sleeptime) 173 do_stats_display(); 174 } 175 return 0; 176 } 177 178 /* 179 * Function to set all the client statistic values to zero. 180 * Called at program startup. 181 */ 182 static void 183 clear_stats(void) 184 { 185 unsigned i; 186 187 for (i = 0; i < num_clients; i++) 188 clients[i].stats.rx = clients[i].stats.rx_drop = 0; 189 } 190 191 /* 192 * send a burst of traffic to a client, assuming there are packets 193 * available to be sent to this client 194 */ 195 static void 196 flush_rx_queue(uint16_t client) 197 { 198 uint16_t j; 199 struct client *cl; 200 201 if (cl_rx_buf[client].count == 0) 202 return; 203 204 cl = &clients[client]; 205 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer, 206 cl_rx_buf[client].count, NULL) == 0){ 207 for (j = 0; j < cl_rx_buf[client].count; j++) 208 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]); 209 cl->stats.rx_drop += cl_rx_buf[client].count; 210 } 211 else 212 cl->stats.rx += cl_rx_buf[client].count; 213 214 cl_rx_buf[client].count = 0; 215 } 216 217 /* 218 * marks a packet down to be sent to a particular client process 219 */ 220 static inline void 221 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf) 222 { 223 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf; 224 } 225 226 /* 227 * This function takes a group of packets and routes them 228 * individually to the client process. Very simply round-robins the packets 229 * without checking any of the packet contents. 230 */ 231 static void 232 process_packets(uint32_t port_num __rte_unused, 233 struct rte_mbuf *pkts[], uint16_t rx_count) 234 { 235 uint16_t i; 236 uint8_t client = 0; 237 238 for (i = 0; i < rx_count; i++) { 239 enqueue_rx_packet(client, pkts[i]); 240 241 if (++client == num_clients) 242 client = 0; 243 } 244 245 for (i = 0; i < num_clients; i++) 246 flush_rx_queue(i); 247 } 248 249 /* 250 * Function called by the main lcore of the DPDK process. 251 */ 252 static void 253 do_packet_forwarding(void) 254 { 255 unsigned port_num = 0; /* indexes the port[] array */ 256 257 for (;;) { 258 struct rte_mbuf *buf[PACKET_READ_SIZE]; 259 uint16_t rx_count; 260 261 /* read a port */ 262 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \ 263 buf, PACKET_READ_SIZE); 264 ports->rx_stats.rx[port_num] += rx_count; 265 266 /* Now process the NIC packets read */ 267 if (likely(rx_count > 0)) 268 process_packets(port_num, buf, rx_count); 269 270 /* move to next port */ 271 if (++port_num == ports->num_ports) 272 port_num = 0; 273 } 274 } 275 276 static void 277 signal_handler(int signal) 278 { 279 uint16_t port_id; 280 281 if (signal == SIGINT) 282 RTE_ETH_FOREACH_DEV(port_id) { 283 rte_eth_dev_stop(port_id); 284 rte_eth_dev_close(port_id); 285 } 286 exit(0); 287 } 288 289 int 290 main(int argc, char *argv[]) 291 { 292 signal(SIGINT, signal_handler); 293 /* initialise the system */ 294 if (init(argc, argv) < 0 ) 295 return -1; 296 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 297 298 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0])); 299 300 /* clear statistics */ 301 clear_stats(); 302 303 /* put all other cores to sleep except main */ 304 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MAIN); 305 306 do_packet_forwarding(); 307 return 0; 308 } 309