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