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