1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 #include <stdint.h> 39 #include <stdarg.h> 40 #include <inttypes.h> 41 #include <inttypes.h> 42 #include <sys/queue.h> 43 #include <errno.h> 44 #include <netinet/ip.h> 45 46 #include <rte_common.h> 47 #include <rte_memory.h> 48 #include <rte_memzone.h> 49 #include <rte_tailq.h> 50 #include <rte_eal.h> 51 #include <rte_byteorder.h> 52 #include <rte_launch.h> 53 #include <rte_per_lcore.h> 54 #include <rte_lcore.h> 55 #include <rte_branch_prediction.h> 56 #include <rte_atomic.h> 57 #include <rte_ring.h> 58 #include <rte_log.h> 59 #include <rte_debug.h> 60 #include <rte_mempool.h> 61 #include <rte_memcpy.h> 62 #include <rte_mbuf.h> 63 #include <rte_ether.h> 64 #include <rte_interrupts.h> 65 #include <rte_pci.h> 66 #include <rte_ethdev.h> 67 #include <rte_byteorder.h> 68 #include <rte_malloc.h> 69 #include <rte_fbk_hash.h> 70 #include <rte_string_fns.h> 71 72 #include "common.h" 73 #include "args.h" 74 #include "init.h" 75 #include "main.h" 76 77 /* 78 * When doing reads from the NIC or the client queues, 79 * use this batch size 80 */ 81 #define PACKET_READ_SIZE 32 82 83 /* 84 * Local buffers to put packets in, used to send packets in bursts to the 85 * clients 86 */ 87 struct client_rx_buf { 88 struct rte_mbuf *buffer[PACKET_READ_SIZE]; 89 uint16_t count; 90 }; 91 92 /* One buffer per client rx queue - dynamically allocate array */ 93 static struct client_rx_buf *cl_rx_buf; 94 95 static const char * 96 get_printable_mac_addr(uint8_t port) 97 { 98 static const char err_address[] = "00:00:00:00:00:00"; 99 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; 100 101 if (unlikely(port >= RTE_MAX_ETHPORTS)) 102 return err_address; 103 if (unlikely(addresses[port][0]=='\0')){ 104 struct ether_addr mac; 105 rte_eth_macaddr_get(port, &mac); 106 snprintf(addresses[port], sizeof(addresses[port]), 107 "%02x:%02x:%02x:%02x:%02x:%02x\n", 108 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2], 109 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]); 110 } 111 return addresses[port]; 112 } 113 114 /* 115 * This function displays the recorded statistics for each port 116 * and for each client. It uses ANSI terminal codes to clear 117 * screen when called. It is called from a single non-master 118 * thread in the server process, when the process is run with more 119 * than one lcore enabled. 120 */ 121 static void 122 do_stats_display(void) 123 { 124 unsigned i, j; 125 const char clr[] = { 27, '[', '2', 'J', '\0' }; 126 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' }; 127 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 128 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS]; 129 130 /* to get TX stats, we need to do some summing calculations */ 131 memset(port_tx, 0, sizeof(port_tx)); 132 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 133 memset(client_tx, 0, sizeof(client_tx)); 134 memset(client_tx_drop, 0, sizeof(client_tx_drop)); 135 136 for (i = 0; i < num_clients; i++){ 137 const volatile struct tx_stats *tx = &ports->tx_stats[i]; 138 for (j = 0; j < ports->num_ports; j++){ 139 /* assign to local variables here, save re-reading volatile vars */ 140 const uint64_t tx_val = tx->tx[ports->id[j]]; 141 const uint64_t drop_val = tx->tx_drop[ports->id[j]]; 142 port_tx[j] += tx_val; 143 port_tx_drop[j] += drop_val; 144 client_tx[i] += tx_val; 145 client_tx_drop[i] += drop_val; 146 } 147 } 148 149 /* Clear screen and move to top left */ 150 printf("%s%s", clr, topLeft); 151 152 printf("PORTS\n"); 153 printf("-----\n"); 154 for (i = 0; i < ports->num_ports; i++) 155 printf("Port %u: '%s'\t", (unsigned)ports->id[i], 156 get_printable_mac_addr(ports->id[i])); 157 printf("\n\n"); 158 for (i = 0; i < ports->num_ports; i++){ 159 printf("Port %u - rx: %9"PRIu64"\t" 160 "tx: %9"PRIu64"\n", 161 (unsigned)ports->id[i], ports->rx_stats.rx[i], 162 port_tx[i]); 163 } 164 165 printf("\nCLIENTS\n"); 166 printf("-------\n"); 167 for (i = 0; i < num_clients; i++){ 168 const unsigned long long rx = clients[i].stats.rx; 169 const unsigned long long rx_drop = clients[i].stats.rx_drop; 170 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n" 171 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n", 172 i, rx, rx_drop, client_tx[i], client_tx_drop[i]); 173 } 174 175 printf("\n"); 176 } 177 178 /* 179 * The function called from each non-master lcore used by the process. 180 * The test_and_set function is used to randomly pick a single lcore on which 181 * the code to display the statistics will run. Otherwise, the code just 182 * repeatedly sleeps. 183 */ 184 static int 185 sleep_lcore(__attribute__((unused)) void *dummy) 186 { 187 /* Used to pick a display thread - static, so zero-initialised */ 188 static rte_atomic32_t display_stats; 189 190 /* Only one core should display stats */ 191 if (rte_atomic32_test_and_set(&display_stats)) { 192 const unsigned sleeptime = 1; 193 printf("Core %u displaying statistics\n", rte_lcore_id()); 194 195 /* Longer initial pause so above printf is seen */ 196 sleep(sleeptime * 3); 197 198 /* Loop forever: sleep always returns 0 or <= param */ 199 while (sleep(sleeptime) <= sleeptime) 200 do_stats_display(); 201 } 202 return 0; 203 } 204 205 /* 206 * Function to set all the client statistic values to zero. 207 * Called at program startup. 208 */ 209 static void 210 clear_stats(void) 211 { 212 unsigned i; 213 214 for (i = 0; i < num_clients; i++) 215 clients[i].stats.rx = clients[i].stats.rx_drop = 0; 216 } 217 218 /* 219 * send a burst of traffic to a client, assuming there are packets 220 * available to be sent to this client 221 */ 222 static void 223 flush_rx_queue(uint16_t client) 224 { 225 uint16_t j; 226 struct client *cl; 227 228 if (cl_rx_buf[client].count == 0) 229 return; 230 231 cl = &clients[client]; 232 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer, 233 cl_rx_buf[client].count) != 0){ 234 for (j = 0; j < cl_rx_buf[client].count; j++) 235 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]); 236 cl->stats.rx_drop += cl_rx_buf[client].count; 237 } 238 else 239 cl->stats.rx += cl_rx_buf[client].count; 240 241 cl_rx_buf[client].count = 0; 242 } 243 244 /* 245 * marks a packet down to be sent to a particular client process 246 */ 247 static inline void 248 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf) 249 { 250 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf; 251 } 252 253 /* 254 * This function takes a group of packets and routes them 255 * individually to the client process. Very simply round-robins the packets 256 * without checking any of the packet contents. 257 */ 258 static void 259 process_packets(uint32_t port_num __rte_unused, 260 struct rte_mbuf *pkts[], uint16_t rx_count) 261 { 262 uint16_t i; 263 uint8_t client = 0; 264 265 for (i = 0; i < rx_count; i++) { 266 enqueue_rx_packet(client, pkts[i]); 267 268 if (++client == num_clients) 269 client = 0; 270 } 271 272 for (i = 0; i < num_clients; i++) 273 flush_rx_queue(i); 274 } 275 276 /* 277 * Function called by the master lcore of the DPDK process. 278 */ 279 static void 280 do_packet_forwarding(void) 281 { 282 unsigned port_num = 0; /* indexes the port[] array */ 283 284 for (;;) { 285 struct rte_mbuf *buf[PACKET_READ_SIZE]; 286 uint16_t rx_count; 287 288 /* read a port */ 289 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \ 290 buf, PACKET_READ_SIZE); 291 ports->rx_stats.rx[port_num] += rx_count; 292 293 /* Now process the NIC packets read */ 294 if (likely(rx_count > 0)) 295 process_packets(port_num, buf, rx_count); 296 297 /* move to next port */ 298 if (++port_num == ports->num_ports) 299 port_num = 0; 300 } 301 } 302 303 int 304 MAIN(int argc, char *argv[]) 305 { 306 /* initialise the system */ 307 if (init(argc, argv) < 0 ) 308 return -1; 309 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 310 311 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0])); 312 313 /* clear statistics */ 314 clear_stats(); 315 316 /* put all other cores to sleep bar master */ 317 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER); 318 319 do_packet_forwarding(); 320 return 0; 321 } 322