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 <sys/queue.h> 42 #include <errno.h> 43 #include <netinet/ip.h> 44 45 #include <rte_common.h> 46 #include <rte_memory.h> 47 #include <rte_eal.h> 48 #include <rte_launch.h> 49 #include <rte_per_lcore.h> 50 #include <rte_lcore.h> 51 #include <rte_branch_prediction.h> 52 #include <rte_atomic.h> 53 #include <rte_ring.h> 54 #include <rte_log.h> 55 #include <rte_debug.h> 56 #include <rte_mempool.h> 57 #include <rte_memcpy.h> 58 #include <rte_mbuf.h> 59 #include <rte_ether.h> 60 #include <rte_interrupts.h> 61 #include <rte_ethdev.h> 62 #include <rte_byteorder.h> 63 #include <rte_malloc.h> 64 #include <rte_string_fns.h> 65 66 #include "common.h" 67 #include "args.h" 68 #include "init.h" 69 70 /* 71 * When doing reads from the NIC or the client queues, 72 * use this batch size 73 */ 74 #define PACKET_READ_SIZE 32 75 76 /* 77 * Local buffers to put packets in, used to send packets in bursts to the 78 * clients 79 */ 80 struct client_rx_buf { 81 struct rte_mbuf *buffer[PACKET_READ_SIZE]; 82 uint16_t count; 83 }; 84 85 /* One buffer per client rx queue - dynamically allocate array */ 86 static struct client_rx_buf *cl_rx_buf; 87 88 static const char * 89 get_printable_mac_addr(uint16_t port) 90 { 91 static const char err_address[] = "00:00:00:00:00:00"; 92 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)]; 93 94 if (unlikely(port >= RTE_MAX_ETHPORTS)) 95 return err_address; 96 if (unlikely(addresses[port][0]=='\0')){ 97 struct ether_addr mac; 98 rte_eth_macaddr_get(port, &mac); 99 snprintf(addresses[port], sizeof(addresses[port]), 100 "%02x:%02x:%02x:%02x:%02x:%02x\n", 101 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2], 102 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]); 103 } 104 return addresses[port]; 105 } 106 107 /* 108 * This function displays the recorded statistics for each port 109 * and for each client. It uses ANSI terminal codes to clear 110 * screen when called. It is called from a single non-master 111 * thread in the server process, when the process is run with more 112 * than one lcore enabled. 113 */ 114 static void 115 do_stats_display(void) 116 { 117 unsigned i, j; 118 const char clr[] = { 27, '[', '2', 'J', '\0' }; 119 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' }; 120 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS]; 121 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS]; 122 123 /* to get TX stats, we need to do some summing calculations */ 124 memset(port_tx, 0, sizeof(port_tx)); 125 memset(port_tx_drop, 0, sizeof(port_tx_drop)); 126 memset(client_tx, 0, sizeof(client_tx)); 127 memset(client_tx_drop, 0, sizeof(client_tx_drop)); 128 129 for (i = 0; i < num_clients; i++){ 130 const volatile struct tx_stats *tx = &ports->tx_stats[i]; 131 for (j = 0; j < ports->num_ports; j++){ 132 /* assign to local variables here, save re-reading volatile vars */ 133 const uint64_t tx_val = tx->tx[ports->id[j]]; 134 const uint64_t drop_val = tx->tx_drop[ports->id[j]]; 135 port_tx[j] += tx_val; 136 port_tx_drop[j] += drop_val; 137 client_tx[i] += tx_val; 138 client_tx_drop[i] += drop_val; 139 } 140 } 141 142 /* Clear screen and move to top left */ 143 printf("%s%s", clr, topLeft); 144 145 printf("PORTS\n"); 146 printf("-----\n"); 147 for (i = 0; i < ports->num_ports; i++) 148 printf("Port %u: '%s'\t", (unsigned)ports->id[i], 149 get_printable_mac_addr(ports->id[i])); 150 printf("\n\n"); 151 for (i = 0; i < ports->num_ports; i++){ 152 printf("Port %u - rx: %9"PRIu64"\t" 153 "tx: %9"PRIu64"\n", 154 (unsigned)ports->id[i], ports->rx_stats.rx[i], 155 port_tx[i]); 156 } 157 158 printf("\nCLIENTS\n"); 159 printf("-------\n"); 160 for (i = 0; i < num_clients; i++){ 161 const unsigned long long rx = clients[i].stats.rx; 162 const unsigned long long rx_drop = clients[i].stats.rx_drop; 163 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n" 164 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n", 165 i, rx, rx_drop, client_tx[i], client_tx_drop[i]); 166 } 167 168 printf("\n"); 169 } 170 171 /* 172 * The function called from each non-master lcore used by the process. 173 * The test_and_set function is used to randomly pick a single lcore on which 174 * the code to display the statistics will run. Otherwise, the code just 175 * repeatedly sleeps. 176 */ 177 static int 178 sleep_lcore(__attribute__((unused)) void *dummy) 179 { 180 /* Used to pick a display thread - static, so zero-initialised */ 181 static rte_atomic32_t display_stats; 182 183 /* Only one core should display stats */ 184 if (rte_atomic32_test_and_set(&display_stats)) { 185 const unsigned sleeptime = 1; 186 printf("Core %u displaying statistics\n", rte_lcore_id()); 187 188 /* Longer initial pause so above printf is seen */ 189 sleep(sleeptime * 3); 190 191 /* Loop forever: sleep always returns 0 or <= param */ 192 while (sleep(sleeptime) <= sleeptime) 193 do_stats_display(); 194 } 195 return 0; 196 } 197 198 /* 199 * Function to set all the client statistic values to zero. 200 * Called at program startup. 201 */ 202 static void 203 clear_stats(void) 204 { 205 unsigned i; 206 207 for (i = 0; i < num_clients; i++) 208 clients[i].stats.rx = clients[i].stats.rx_drop = 0; 209 } 210 211 /* 212 * send a burst of traffic to a client, assuming there are packets 213 * available to be sent to this client 214 */ 215 static void 216 flush_rx_queue(uint16_t client) 217 { 218 uint16_t j; 219 struct client *cl; 220 221 if (cl_rx_buf[client].count == 0) 222 return; 223 224 cl = &clients[client]; 225 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer, 226 cl_rx_buf[client].count, NULL) == 0){ 227 for (j = 0; j < cl_rx_buf[client].count; j++) 228 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]); 229 cl->stats.rx_drop += cl_rx_buf[client].count; 230 } 231 else 232 cl->stats.rx += cl_rx_buf[client].count; 233 234 cl_rx_buf[client].count = 0; 235 } 236 237 /* 238 * marks a packet down to be sent to a particular client process 239 */ 240 static inline void 241 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf) 242 { 243 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf; 244 } 245 246 /* 247 * This function takes a group of packets and routes them 248 * individually to the client process. Very simply round-robins the packets 249 * without checking any of the packet contents. 250 */ 251 static void 252 process_packets(uint32_t port_num __rte_unused, 253 struct rte_mbuf *pkts[], uint16_t rx_count) 254 { 255 uint16_t i; 256 uint8_t client = 0; 257 258 for (i = 0; i < rx_count; i++) { 259 enqueue_rx_packet(client, pkts[i]); 260 261 if (++client == num_clients) 262 client = 0; 263 } 264 265 for (i = 0; i < num_clients; i++) 266 flush_rx_queue(i); 267 } 268 269 /* 270 * Function called by the master lcore of the DPDK process. 271 */ 272 static void 273 do_packet_forwarding(void) 274 { 275 unsigned port_num = 0; /* indexes the port[] array */ 276 277 for (;;) { 278 struct rte_mbuf *buf[PACKET_READ_SIZE]; 279 uint16_t rx_count; 280 281 /* read a port */ 282 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \ 283 buf, PACKET_READ_SIZE); 284 ports->rx_stats.rx[port_num] += rx_count; 285 286 /* Now process the NIC packets read */ 287 if (likely(rx_count > 0)) 288 process_packets(port_num, buf, rx_count); 289 290 /* move to next port */ 291 if (++port_num == ports->num_ports) 292 port_num = 0; 293 } 294 } 295 296 int 297 main(int argc, char *argv[]) 298 { 299 /* initialise the system */ 300 if (init(argc, argv) < 0 ) 301 return -1; 302 RTE_LOG(INFO, APP, "Finished Process Init.\n"); 303 304 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0])); 305 306 /* clear statistics */ 307 clear_stats(); 308 309 /* put all other cores to sleep bar master */ 310 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER); 311 312 do_packet_forwarding(); 313 return 0; 314 } 315