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_eal.h> 50 #include <rte_byteorder.h> 51 #include <rte_launch.h> 52 #include <rte_per_lcore.h> 53 #include <rte_lcore.h> 54 #include <rte_branch_prediction.h> 55 #include <rte_atomic.h> 56 #include <rte_ring.h> 57 #include <rte_log.h> 58 #include <rte_debug.h> 59 #include <rte_mempool.h> 60 #include <rte_memcpy.h> 61 #include <rte_mbuf.h> 62 #include <rte_ether.h> 63 #include <rte_interrupts.h> 64 #include <rte_pci.h> 65 #include <rte_ethdev.h> 66 #include <rte_byteorder.h> 67 #include <rte_malloc.h> 68 #include <rte_fbk_hash.h> 69 #include <rte_string_fns.h> 70 71 #include "common.h" 72 #include "args.h" 73 #include "init.h" 74 75 /* 76 * When doing reads from the NIC or the client queues, 77 * use this batch size 78 */ 79 #define PACKET_READ_SIZE 32 80 81 /* 82 * Local buffers to put packets in, used to send packets in bursts to the 83 * clients 84 */ 85 struct client_rx_buf { 86 struct rte_mbuf *buffer[PACKET_READ_SIZE]; 87 uint16_t count; 88 }; 89 90 /* One buffer per client rx queue - dynamically allocate array */ 91 static struct client_rx_buf *cl_rx_buf; 92 93 static const char * 94 get_printable_mac_addr(uint8_t port) 95 { 96 static const char err_address[] = "00:00:00:00:00:00"; 97 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; 98 99 if (unlikely(port >= RTE_MAX_ETHPORTS)) 100 return err_address; 101 if (unlikely(addresses[port][0]=='\0')){ 102 struct ether_addr mac; 103 rte_eth_macaddr_get(port, &mac); 104 snprintf(addresses[port], sizeof(addresses[port]), 105 "%02x:%02x:%02x:%02x:%02x:%02x\n", 106 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2], 107 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]); 108 } 109 return addresses[port]; 110 } 111 112 /* 113 * This function displays the recorded statistics for each port 114 * and for each client. It uses ANSI terminal codes to clear 115 * screen when called. It is called from a single non-master 116 * thread in the server process, when the process is run with more 117 * than one lcore enabled. 118 */ 119 static void 120 do_stats_display(void) 121 { 122 unsigned i, j; 123 const char clr[] = { 27, '[', '2', 'J', '\0' }; 124 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' }; 125 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 126 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS]; 127 128 /* to get TX stats, we need to do some summing calculations */ 129 memset(port_tx, 0, sizeof(port_tx)); 130 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 131 memset(client_tx, 0, sizeof(client_tx)); 132 memset(client_tx_drop, 0, sizeof(client_tx_drop)); 133 134 for (i = 0; i < num_clients; i++){ 135 const volatile struct tx_stats *tx = &ports->tx_stats[i]; 136 for (j = 0; j < ports->num_ports; j++){ 137 /* assign to local variables here, save re-reading volatile vars */ 138 const uint64_t tx_val = tx->tx[ports->id[j]]; 139 const uint64_t drop_val = tx->tx_drop[ports->id[j]]; 140 port_tx[j] += tx_val; 141 port_tx_drop[j] += drop_val; 142 client_tx[i] += tx_val; 143 client_tx_drop[i] += drop_val; 144 } 145 } 146 147 /* Clear screen and move to top left */ 148 printf("%s%s", clr, topLeft); 149 150 printf("PORTS\n"); 151 printf("-----\n"); 152 for (i = 0; i < ports->num_ports; i++) 153 printf("Port %u: '%s'\t", (unsigned)ports->id[i], 154 get_printable_mac_addr(ports->id[i])); 155 printf("\n\n"); 156 for (i = 0; i < ports->num_ports; i++){ 157 printf("Port %u - rx: %9"PRIu64"\t" 158 "tx: %9"PRIu64"\n", 159 (unsigned)ports->id[i], ports->rx_stats.rx[i], 160 port_tx[i]); 161 } 162 163 printf("\nCLIENTS\n"); 164 printf("-------\n"); 165 for (i = 0; i < num_clients; i++){ 166 const unsigned long long rx = clients[i].stats.rx; 167 const unsigned long long rx_drop = clients[i].stats.rx_drop; 168 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n" 169 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n", 170 i, rx, rx_drop, client_tx[i], client_tx_drop[i]); 171 } 172 173 printf("\n"); 174 } 175 176 /* 177 * The function called from each non-master lcore used by the process. 178 * The test_and_set function is used to randomly pick a single lcore on which 179 * the code to display the statistics will run. Otherwise, the code just 180 * repeatedly sleeps. 181 */ 182 static int 183 sleep_lcore(__attribute__((unused)) void *dummy) 184 { 185 /* Used to pick a display thread - static, so zero-initialised */ 186 static rte_atomic32_t display_stats; 187 188 /* Only one core should display stats */ 189 if (rte_atomic32_test_and_set(&display_stats)) { 190 const unsigned sleeptime = 1; 191 printf("Core %u displaying statistics\n", rte_lcore_id()); 192 193 /* Longer initial pause so above printf is seen */ 194 sleep(sleeptime * 3); 195 196 /* Loop forever: sleep always returns 0 or <= param */ 197 while (sleep(sleeptime) <= sleeptime) 198 do_stats_display(); 199 } 200 return 0; 201 } 202 203 /* 204 * Function to set all the client statistic values to zero. 205 * Called at program startup. 206 */ 207 static void 208 clear_stats(void) 209 { 210 unsigned i; 211 212 for (i = 0; i < num_clients; i++) 213 clients[i].stats.rx = clients[i].stats.rx_drop = 0; 214 } 215 216 /* 217 * send a burst of traffic to a client, assuming there are packets 218 * available to be sent to this client 219 */ 220 static void 221 flush_rx_queue(uint16_t client) 222 { 223 uint16_t j; 224 struct client *cl; 225 226 if (cl_rx_buf[client].count == 0) 227 return; 228 229 cl = &clients[client]; 230 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer, 231 cl_rx_buf[client].count) != 0){ 232 for (j = 0; j < cl_rx_buf[client].count; j++) 233 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]); 234 cl->stats.rx_drop += cl_rx_buf[client].count; 235 } 236 else 237 cl->stats.rx += cl_rx_buf[client].count; 238 239 cl_rx_buf[client].count = 0; 240 } 241 242 /* 243 * marks a packet down to be sent to a particular client process 244 */ 245 static inline void 246 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf) 247 { 248 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf; 249 } 250 251 /* 252 * This function takes a group of packets and routes them 253 * individually to the client process. Very simply round-robins the packets 254 * without checking any of the packet contents. 255 */ 256 static void 257 process_packets(uint32_t port_num __rte_unused, 258 struct rte_mbuf *pkts[], uint16_t rx_count) 259 { 260 uint16_t i; 261 uint8_t client = 0; 262 263 for (i = 0; i < rx_count; i++) { 264 enqueue_rx_packet(client, pkts[i]); 265 266 if (++client == num_clients) 267 client = 0; 268 } 269 270 for (i = 0; i < num_clients; i++) 271 flush_rx_queue(i); 272 } 273 274 /* 275 * Function called by the master lcore of the DPDK process. 276 */ 277 static void 278 do_packet_forwarding(void) 279 { 280 unsigned port_num = 0; /* indexes the port[] array */ 281 282 for (;;) { 283 struct rte_mbuf *buf[PACKET_READ_SIZE]; 284 uint16_t rx_count; 285 286 /* read a port */ 287 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \ 288 buf, PACKET_READ_SIZE); 289 ports->rx_stats.rx[port_num] += rx_count; 290 291 /* Now process the NIC packets read */ 292 if (likely(rx_count > 0)) 293 process_packets(port_num, buf, rx_count); 294 295 /* move to next port */ 296 if (++port_num == ports->num_ports) 297 port_num = 0; 298 } 299 } 300 301 int 302 main(int argc, char *argv[]) 303 { 304 /* initialise the system */ 305 if (init(argc, argv) < 0 ) 306 return -1; 307 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 308 309 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0])); 310 311 /* clear statistics */ 312 clear_stats(); 313 314 /* put all other cores to sleep bar master */ 315 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER); 316 317 do_packet_forwarding(); 318 return 0; 319 } 320