1 #define _GNU_SOURCE 2 #include <sched.h> 3 #include <unistd.h> 4 #include <sys/time.h> 5 #include <semaphore.h> 6 #include <sys/mman.h> 7 #include <signal.h> 8 #include <assert.h> 9 #include <string.h> 10 11 #include "cpu.h" 12 #include "eth_in.h" 13 #include "fhash.h" 14 #include "tcp_send_buffer.h" 15 #include "tcp_ring_buffer.h" 16 #include "socket.h" 17 #include "eth_out.h" 18 #include "tcp.h" 19 #include "tcp_in.h" 20 #include "tcp_out.h" 21 #include "mtcp_api.h" 22 #include "eventpoll.h" 23 #include "logger.h" 24 #include "config.h" 25 #include "arp.h" 26 #include "ip_out.h" 27 #include "timer.h" 28 #include "debug.h" 29 #include "event_callback.h" 30 #include "tcp_rb.h" 31 #include "tcp_stream.h" 32 #include "io_module.h" 33 34 #ifdef ENABLE_DPDK 35 /* for launching rte thread */ 36 #include <rte_launch.h> 37 #include <rte_lcore.h> 38 #endif /* !ENABLE_DPDK */ 39 #define PS_CHUNK_SIZE 64 40 #define RX_THRESH (PS_CHUNK_SIZE * 0.8) 41 42 #define ROUND_STAT FALSE 43 #define TIME_STAT FALSE 44 #define EVENT_STAT FALSE 45 #define TESTING FALSE 46 47 #define LOG_FILE_NAME "log" 48 #define MAX_FILE_NAME 1024 49 50 #define MAX(a, b) ((a)>(b)?(a):(b)) 51 #define MIN(a, b) ((a)<(b)?(a):(b)) 52 53 #define PER_STREAM_SLICE 0.1 // in ms 54 #define PER_STREAM_TCHECK 1 // in ms 55 #define PS_SELECT_TIMEOUT 100 // in us 56 57 #define GBPS(bytes) (bytes * 8.0 / (1000 * 1000 * 1000)) 58 59 /*----------------------------------------------------------------------------*/ 60 /* handlers for threads */ 61 struct mtcp_thread_context *g_pctx[MAX_CPUS] = {0}; 62 struct log_thread_context *g_logctx[MAX_CPUS] = {0}; 63 /*----------------------------------------------------------------------------*/ 64 static pthread_t g_thread[MAX_CPUS] = {0}; 65 static pthread_t log_thread[MAX_CPUS] = {0}; 66 /*----------------------------------------------------------------------------*/ 67 static sem_t g_init_sem[MAX_CPUS]; 68 static sem_t g_done_sem[MAX_CPUS]; 69 static int running[MAX_CPUS] = {0}; 70 /*----------------------------------------------------------------------------*/ 71 mtcp_sighandler_t app_signal_handler; 72 static int sigint_cnt[MAX_CPUS] = {0}; 73 static struct timespec sigint_ts[MAX_CPUS]; 74 /*----------------------------------------------------------------------------*/ 75 #ifdef NETSTAT 76 #if NETSTAT_TOTAL 77 static int printer = -1; 78 #if ROUND_STAT 79 #endif /* ROUND_STAT */ 80 #endif /* NETSTAT_TOTAL */ 81 #endif /* NETSTAT */ 82 /*----------------------------------------------------------------------------*/ 83 void 84 HandleSignal(int signal) 85 { 86 int i = 0; 87 88 if (signal == SIGINT) { 89 #ifdef DARWIN 90 int core = 0; 91 #else 92 int core = sched_getcpu(); 93 #endif 94 struct timespec cur_ts; 95 96 clock_gettime(CLOCK_REALTIME, &cur_ts); 97 98 if (sigint_cnt[core] > 0 && cur_ts.tv_sec == sigint_ts[core].tv_sec) { 99 for (i = 0; i < g_config.mos->num_cores; i++) { 100 if (running[i]) { 101 exit(0); 102 g_pctx[i]->exit = TRUE; 103 } 104 } 105 } else { 106 for (i = 0; i < g_config.mos->num_cores; i++) { 107 if (g_pctx[i]) 108 g_pctx[i]->interrupt = TRUE; 109 } 110 if (!app_signal_handler) { 111 for (i = 0; i < g_config.mos->num_cores; i++) { 112 if (running[i]) { 113 exit(0); 114 g_pctx[i]->exit = TRUE; 115 } 116 } 117 } 118 } 119 sigint_cnt[core]++; 120 clock_gettime(CLOCK_REALTIME, &sigint_ts[core]); 121 } 122 123 if (signal != SIGUSR1) { 124 if (app_signal_handler) { 125 app_signal_handler(signal); 126 } 127 } 128 } 129 /*----------------------------------------------------------------------------*/ 130 static int 131 AttachDevice(struct mtcp_thread_context* ctx) 132 { 133 int working = -1; 134 mtcp_manager_t mtcp = ctx->mtcp_manager; 135 136 if (mtcp->iom->link_devices) 137 working = mtcp->iom->link_devices(ctx); 138 else 139 return 0; 140 141 return working; 142 } 143 /*----------------------------------------------------------------------------*/ 144 #ifdef TIMESTAT 145 static inline void 146 InitStatCounter(struct stat_counter *counter) 147 { 148 counter->cnt = 0; 149 counter->sum = 0; 150 counter->max = 0; 151 counter->min = 0; 152 } 153 /*----------------------------------------------------------------------------*/ 154 static inline void 155 UpdateStatCounter(struct stat_counter *counter, int64_t value) 156 { 157 counter->cnt++; 158 counter->sum += value; 159 if (value > counter->max) 160 counter->max = value; 161 if (counter->min == 0 || value < counter->min) 162 counter->min = value; 163 } 164 /*----------------------------------------------------------------------------*/ 165 static inline uint64_t 166 GetAverageStat(struct stat_counter *counter) 167 { 168 return counter->cnt ? (counter->sum / counter->cnt) : 0; 169 } 170 /*----------------------------------------------------------------------------*/ 171 static inline int64_t 172 TimeDiffUs(struct timeval *t2, struct timeval *t1) 173 { 174 return (t2->tv_sec - t1->tv_sec) * 1000000 + 175 (int64_t)(t2->tv_usec - t1->tv_usec); 176 } 177 /*----------------------------------------------------------------------------*/ 178 #endif 179 #ifdef NETSTAT 180 static inline void 181 PrintThreadNetworkStats(mtcp_manager_t mtcp, struct net_stat *ns) 182 { 183 int i; 184 185 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 186 ns->rx_packets[i] = mtcp->nstat.rx_packets[i] - mtcp->p_nstat.rx_packets[i]; 187 ns->rx_errors[i] = mtcp->nstat.rx_errors[i] - mtcp->p_nstat.rx_errors[i]; 188 ns->rx_bytes[i] = mtcp->nstat.rx_bytes[i] - mtcp->p_nstat.rx_bytes[i]; 189 ns->tx_packets[i] = mtcp->nstat.tx_packets[i] - mtcp->p_nstat.tx_packets[i]; 190 ns->tx_drops[i] = mtcp->nstat.tx_drops[i] - mtcp->p_nstat.tx_drops[i]; 191 ns->tx_bytes[i] = mtcp->nstat.tx_bytes[i] - mtcp->p_nstat.tx_bytes[i]; 192 #if NETSTAT_PERTHREAD 193 if (g_config.mos->netdev_table->ent[i]->stat_print) { 194 fprintf(stderr, "[CPU%2d] %s flows: %6u, " 195 "RX: %7llu(pps) (err: %5llu), %5.2lf(Gbps), " 196 "TX: %7llu(pps), %5.2lf(Gbps)\n", 197 mtcp->ctx->cpu, 198 g_config.mos->netdev_table->ent[i]->dev_name, 199 (unsigned)mtcp->flow_cnt, 200 (long long unsigned)ns->rx_packets[i], 201 (long long unsigned)ns->rx_errors[i], 202 GBPS(ns->rx_bytes[i]), 203 (long long unsigned)ns->tx_packets[i], 204 GBPS(ns->tx_bytes[i])); 205 } 206 #endif 207 } 208 mtcp->p_nstat = mtcp->nstat; 209 210 } 211 /*----------------------------------------------------------------------------*/ 212 #if ROUND_STAT 213 static inline void 214 PrintThreadRoundStats(mtcp_manager_t mtcp, struct run_stat *rs) 215 { 216 #define ROUND_DIV (1000) 217 rs->rounds = mtcp->runstat.rounds - mtcp->p_runstat.rounds; 218 rs->rounds_rx = mtcp->runstat.rounds_rx - mtcp->p_runstat.rounds_rx; 219 rs->rounds_rx_try = mtcp->runstat.rounds_rx_try - mtcp->p_runstat.rounds_rx_try; 220 rs->rounds_tx = mtcp->runstat.rounds_tx - mtcp->p_runstat.rounds_tx; 221 rs->rounds_tx_try = mtcp->runstat.rounds_tx_try - mtcp->p_runstat.rounds_tx_try; 222 rs->rounds_select = mtcp->runstat.rounds_select - mtcp->p_runstat.rounds_select; 223 rs->rounds_select_rx = mtcp->runstat.rounds_select_rx - mtcp->p_runstat.rounds_select_rx; 224 rs->rounds_select_tx = mtcp->runstat.rounds_select_tx - mtcp->p_runstat.rounds_select_tx; 225 rs->rounds_select_intr = mtcp->runstat.rounds_select_intr - mtcp->p_runstat.rounds_select_intr; 226 rs->rounds_twcheck = mtcp->runstat.rounds_twcheck - mtcp->p_runstat.rounds_twcheck; 227 mtcp->p_runstat = mtcp->runstat; 228 #if NETSTAT_PERTHREAD 229 fprintf(stderr, "[CPU%2d] Rounds: %4lluK, " 230 "rx: %3lluK (try: %4lluK), tx: %3lluK (try: %4lluK), " 231 "ps_select: %4llu (rx: %4llu, tx: %4llu, intr: %3llu)\n", 232 mtcp->ctx->cpu, rs->rounds / ROUND_DIV, 233 rs->rounds_rx / ROUND_DIV, rs->rounds_rx_try / ROUND_DIV, 234 rs->rounds_tx / ROUND_DIV, rs->rounds_tx_try / ROUND_DIV, 235 rs->rounds_select, 236 rs->rounds_select_rx, rs->rounds_select_tx, rs->rounds_select_intr); 237 #endif 238 } 239 #endif /* ROUND_STAT */ 240 /*----------------------------------------------------------------------------*/ 241 #if TIME_STAT 242 static inline void 243 PrintThreadRoundTime(mtcp_manager_t mtcp) 244 { 245 fprintf(stderr, "[CPU%2d] Time: (avg, max) " 246 "round: (%4luus, %4luus), processing: (%4luus, %4luus), " 247 "tcheck: (%4luus, %4luus), epoll: (%4luus, %4luus), " 248 "handle: (%4luus, %4luus), xmit: (%4luus, %4luus), " 249 "select: (%4luus, %4luus)\n", mtcp->ctx->cpu, 250 GetAverageStat(&mtcp->rtstat.round), mtcp->rtstat.round.max, 251 GetAverageStat(&mtcp->rtstat.processing), mtcp->rtstat.processing.max, 252 GetAverageStat(&mtcp->rtstat.tcheck), mtcp->rtstat.tcheck.max, 253 GetAverageStat(&mtcp->rtstat.epoll), mtcp->rtstat.epoll.max, 254 GetAverageStat(&mtcp->rtstat.handle), mtcp->rtstat.handle.max, 255 GetAverageStat(&mtcp->rtstat.xmit), mtcp->rtstat.xmit.max, 256 GetAverageStat(&mtcp->rtstat.select), mtcp->rtstat.select.max); 257 258 InitStatCounter(&mtcp->rtstat.round); 259 InitStatCounter(&mtcp->rtstat.processing); 260 InitStatCounter(&mtcp->rtstat.tcheck); 261 InitStatCounter(&mtcp->rtstat.epoll); 262 InitStatCounter(&mtcp->rtstat.handle); 263 InitStatCounter(&mtcp->rtstat.xmit); 264 InitStatCounter(&mtcp->rtstat.select); 265 } 266 #endif 267 #endif /* NETSTAT */ 268 /*----------------------------------------------------------------------------*/ 269 #if EVENT_STAT 270 static inline void 271 PrintEventStat(int core, struct mtcp_epoll_stat *stat) 272 { 273 fprintf(stderr, "[CPU%2d] calls: %lu, waits: %lu, wakes: %lu, " 274 "issued: %lu, registered: %lu, invalidated: %lu, handled: %lu\n", 275 core, stat->calls, stat->waits, stat->wakes, 276 stat->issued, stat->registered, stat->invalidated, stat->handled); 277 memset(stat, 0, sizeof(struct mtcp_epoll_stat)); 278 } 279 #endif /* EVENT_STAT */ 280 /*----------------------------------------------------------------------------*/ 281 #ifdef NETSTAT 282 static inline void 283 PrintNetworkStats(mtcp_manager_t mtcp, uint32_t cur_ts) 284 { 285 #define TIMEOUT 1 286 int i; 287 struct net_stat ns; 288 bool stat_print = false; 289 #if ROUND_STAT 290 struct run_stat rs; 291 #endif /* ROUND_STAT */ 292 #ifdef NETSTAT_TOTAL 293 static double peak_total_rx_gbps = 0; 294 static double peak_total_tx_gbps = 0; 295 static double avg_total_rx_gbps = 0; 296 static double avg_total_tx_gbps = 0; 297 298 double total_rx_gbps = 0, total_tx_gbps = 0; 299 int j; 300 uint32_t gflow_cnt = 0; 301 struct net_stat g_nstat; 302 #if ROUND_STAT 303 struct run_stat g_runstat; 304 #endif /* ROUND_STAT */ 305 #endif /* NETSTAT_TOTAL */ 306 307 if (TS_TO_MSEC(cur_ts - mtcp->p_nstat_ts) < SEC_TO_MSEC(TIMEOUT)) { 308 return; 309 } 310 311 mtcp->p_nstat_ts = cur_ts; 312 gflow_cnt = 0; 313 memset(&g_nstat, 0, sizeof(struct net_stat)); 314 for (i = 0; i < g_config.mos->num_cores; i++) { 315 if (running[i]) { 316 PrintThreadNetworkStats(g_mtcp[i], &ns); 317 #if NETSTAT_TOTAL 318 gflow_cnt += g_mtcp[i]->flow_cnt; 319 for (j = 0; j < g_config.mos->netdev_table->num; j++) { 320 g_nstat.rx_packets[j] += ns.rx_packets[j]; 321 g_nstat.rx_errors[j] += ns.rx_errors[j]; 322 g_nstat.rx_bytes[j] += ns.rx_bytes[j]; 323 g_nstat.tx_packets[j] += ns.tx_packets[j]; 324 g_nstat.tx_drops[j] += ns.tx_drops[j]; 325 g_nstat.tx_bytes[j] += ns.tx_bytes[j]; 326 } 327 #endif 328 } 329 } 330 #if NETSTAT_TOTAL 331 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 332 if (g_config.mos->netdev_table->ent[i]->stat_print) { 333 fprintf(stderr, "[ ALL ] %s, " 334 "RX: %7llu(pps) (err: %5llu), %5.2lf(Gbps), " 335 "TX: %7llu(pps), %5.2lf(Gbps)\n", 336 g_config.mos->netdev_table->ent[i]->dev_name, 337 (long long unsigned)g_nstat.rx_packets[i], 338 (long long unsigned)g_nstat.rx_errors[i], 339 GBPS(g_nstat.rx_bytes[i]), 340 (long long unsigned)g_nstat.tx_packets[i], 341 GBPS(g_nstat.tx_bytes[i])); 342 total_rx_gbps += GBPS(g_nstat.rx_bytes[i]); 343 total_tx_gbps += GBPS(g_nstat.tx_bytes[i]); 344 stat_print = true; 345 } 346 } 347 if (stat_print) { 348 fprintf(stderr, "[ ALL ] flows: %6u\n", gflow_cnt); 349 if (avg_total_rx_gbps == 0) 350 avg_total_rx_gbps = total_rx_gbps; 351 else 352 avg_total_rx_gbps = avg_total_rx_gbps * 0.6 + total_rx_gbps * 0.4; 353 354 if (avg_total_tx_gbps == 0) 355 avg_total_tx_gbps = total_tx_gbps; 356 else 357 avg_total_tx_gbps = avg_total_tx_gbps * 0.6 + total_tx_gbps * 0.4; 358 359 if (peak_total_rx_gbps < total_rx_gbps) 360 peak_total_rx_gbps = total_rx_gbps; 361 if (peak_total_tx_gbps < total_tx_gbps) 362 peak_total_tx_gbps = total_tx_gbps; 363 364 fprintf(stderr, "[ PEAK ] RX: %5.2lf(Gbps), TX: %5.2lf(Gbps)\n" 365 "[ RECENT AVG ] RX: %5.2lf(Gbps), TX: %5.2lf(Gbps)\n", 366 peak_total_rx_gbps, peak_total_tx_gbps, 367 avg_total_rx_gbps, avg_total_tx_gbps); 368 } 369 #endif 370 371 #if ROUND_STAT 372 memset(&g_runstat, 0, sizeof(struct run_stat)); 373 for (i = 0; i < g_config.mos->num_cores; i++) { 374 if (running[i]) { 375 PrintThreadRoundStats(g_mtcp[i], &rs); 376 #if DBGMSG 377 g_runstat.rounds += rs.rounds; 378 g_runstat.rounds_rx += rs.rounds_rx; 379 g_runstat.rounds_rx_try += rs.rounds_rx_try; 380 g_runstat.rounds_tx += rs.rounds_tx; 381 g_runstat.rounds_tx_try += rs.rounds_tx_try; 382 g_runstat.rounds_select += rs.rounds_select; 383 g_runstat.rounds_select_rx += rs.rounds_select_rx; 384 g_runstat.rounds_select_tx += rs.rounds_select_tx; 385 #endif 386 } 387 } 388 389 TRACE_DBG("[ ALL ] Rounds: %4ldK, " 390 "rx: %3ldK (try: %4ldK), tx: %3ldK (try: %4ldK), " 391 "ps_select: %4ld (rx: %4ld, tx: %4ld)\n", 392 g_runstat.rounds / 1000, g_runstat.rounds_rx / 1000, 393 g_runstat.rounds_rx_try / 1000, g_runstat.rounds_tx / 1000, 394 g_runstat.rounds_tx_try / 1000, g_runstat.rounds_select, 395 g_runstat.rounds_select_rx, g_runstat.rounds_select_tx); 396 #endif /* ROUND_STAT */ 397 398 #if TIME_STAT 399 for (i = 0; i < g_config.mos->num_cores; i++) { 400 if (running[i]) { 401 PrintThreadRoundTime(g_mtcp[i]); 402 } 403 } 404 #endif 405 406 #if EVENT_STAT 407 for (i = 0; i < g_config.mos->num_cores; i++) { 408 if (running[i] && g_mtcp[i]->ep) { 409 PrintEventStat(i, &g_mtcp[i]->ep->stat); 410 } 411 } 412 #endif 413 414 fflush(stderr); 415 } 416 #endif /* NETSTAT */ 417 /*----------------------------------------------------------------------------*/ 418 static inline void 419 FlushMonitorReadEvents(mtcp_manager_t mtcp) 420 { 421 struct event_queue *mtcpq; 422 struct tcp_stream *cur_stream; 423 struct mon_listener *walk; 424 425 /* check if monitor sockets should be passed data */ 426 TAILQ_FOREACH(walk, &mtcp->monitors, link) { 427 if (walk->socket->socktype != MOS_SOCK_MONITOR_STREAM || 428 !(mtcpq = walk->eq)) 429 continue; 430 431 while (mtcpq->num_events > 0) { 432 cur_stream = 433 (struct tcp_stream *)mtcpq->events[mtcpq->start++].ev.data.ptr; 434 /* only read events */ 435 if (cur_stream != NULL && 436 (cur_stream->socket->events | MOS_EPOLLIN)) { 437 if (cur_stream->rcvvar != NULL && 438 cur_stream->rcvvar->rcvbuf != NULL) { 439 /* no need to pass pkt context */ 440 struct socket_map *walk; 441 SOCKQ_FOREACH_START(walk, &cur_stream->msocks) { 442 HandleCallback(mtcp, MOS_NULL, walk, 443 cur_stream->side, NULL, 444 MOS_ON_CONN_NEW_DATA); 445 } SOCKQ_FOREACH_END; 446 } 447 /* reset the actions now */ 448 cur_stream->actions = 0; 449 } 450 if (mtcpq->start >= mtcpq->size) 451 mtcpq->start = 0; 452 mtcpq->num_events--; 453 } 454 } 455 } 456 /*----------------------------------------------------------------------------*/ 457 static inline void 458 FlushBufferedReadEvents(mtcp_manager_t mtcp) 459 { 460 int i; 461 int offset; 462 struct event_queue *mtcpq; 463 struct tcp_stream *cur_stream; 464 465 if (mtcp->ep == NULL) { 466 TRACE_EPOLL("No epoll socket has been registered yet!\n"); 467 return; 468 } else { 469 /* case when mtcpq exists */ 470 mtcpq = mtcp->ep->mtcp_queue; 471 offset = mtcpq->start; 472 } 473 474 /* we will use queued-up epoll read-in events 475 * to trigger buffered read monitor events */ 476 for (i = 0; i < mtcpq->num_events; i++) { 477 cur_stream = mtcp->smap[mtcpq->events[offset++].sockid].stream; 478 /* only read events */ 479 /* Raise new data callback event */ 480 if (cur_stream != NULL && 481 (cur_stream->socket->events | MOS_EPOLLIN)) { 482 if (cur_stream->rcvvar != NULL && 483 cur_stream->rcvvar->rcvbuf != NULL) { 484 /* no need to pass pkt context */ 485 struct socket_map *walk; 486 SOCKQ_FOREACH_START(walk, &cur_stream->msocks) { 487 HandleCallback(mtcp, MOS_NULL, walk, cur_stream->side, 488 NULL, MOS_ON_CONN_NEW_DATA); 489 } SOCKQ_FOREACH_END; 490 } 491 } 492 if (offset >= mtcpq->size) 493 offset = 0; 494 } 495 } 496 /*----------------------------------------------------------------------------*/ 497 static inline void 498 FlushEpollEvents(mtcp_manager_t mtcp, uint32_t cur_ts) 499 { 500 struct mtcp_epoll *ep = mtcp->ep; 501 struct event_queue *usrq = ep->usr_queue; 502 struct event_queue *mtcpq = ep->mtcp_queue; 503 504 pthread_mutex_lock(&ep->epoll_lock); 505 if (ep->mtcp_queue->num_events > 0) { 506 /* while mtcp_queue have events */ 507 /* and usr_queue is not full */ 508 while (mtcpq->num_events > 0 && usrq->num_events < usrq->size) { 509 /* copy the event from mtcp_queue to usr_queue */ 510 usrq->events[usrq->end++] = mtcpq->events[mtcpq->start++]; 511 512 if (usrq->end >= usrq->size) 513 usrq->end = 0; 514 usrq->num_events++; 515 516 if (mtcpq->start >= mtcpq->size) 517 mtcpq->start = 0; 518 mtcpq->num_events--; 519 } 520 } 521 522 /* if there are pending events, wake up user */ 523 if (ep->waiting && (ep->usr_queue->num_events > 0 || 524 ep->usr_shadow_queue->num_events > 0)) { 525 STAT_COUNT(mtcp->runstat.rounds_epoll); 526 TRACE_EPOLL("Broadcasting events. num: %d, cur_ts: %u, prev_ts: %u\n", 527 ep->usr_queue->num_events, cur_ts, mtcp->ts_last_event); 528 mtcp->ts_last_event = cur_ts; 529 ep->stat.wakes++; 530 pthread_cond_signal(&ep->epoll_cond); 531 } 532 pthread_mutex_unlock(&ep->epoll_lock); 533 } 534 /*----------------------------------------------------------------------------*/ 535 static inline void 536 HandleApplicationCalls(mtcp_manager_t mtcp, uint32_t cur_ts) 537 { 538 tcp_stream *stream; 539 int cnt, max_cnt; 540 int handled, delayed; 541 int control, send, ack; 542 543 /* connect handling */ 544 while ((stream = StreamDequeue(mtcp->connectq))) { 545 if (stream->state != TCP_ST_SYN_SENT) { 546 TRACE_INFO("Got a connection request from app with state: %s", 547 TCPStateToString(stream)); 548 exit(EXIT_FAILURE); 549 } else { 550 stream->cb_events |= MOS_ON_CONN_START | 551 MOS_ON_TCP_STATE_CHANGE; 552 /* if monitor is on... */ 553 if (stream->pair_stream != NULL) 554 stream->pair_stream->cb_events |= 555 MOS_ON_CONN_START; 556 } 557 AddtoControlList(mtcp, stream, cur_ts); 558 } 559 560 /* send queue handling */ 561 while ((stream = StreamDequeue(mtcp->sendq))) { 562 stream->sndvar->on_sendq = FALSE; 563 AddtoSendList(mtcp, stream); 564 } 565 566 /* ack queue handling */ 567 while ((stream = StreamDequeue(mtcp->ackq))) { 568 stream->sndvar->on_ackq = FALSE; 569 EnqueueACK(mtcp, stream, cur_ts, ACK_OPT_AGGREGATE); 570 } 571 572 /* close handling */ 573 handled = delayed = 0; 574 control = send = ack = 0; 575 while ((stream = StreamDequeue(mtcp->closeq))) { 576 struct tcp_send_vars *sndvar = stream->sndvar; 577 sndvar->on_closeq = FALSE; 578 579 if (sndvar->sndbuf) { 580 sndvar->fss = sndvar->sndbuf->head_seq + sndvar->sndbuf->len; 581 } else { 582 sndvar->fss = stream->snd_nxt; 583 } 584 585 if (g_config.mos->tcp_timeout > 0) 586 RemoveFromTimeoutList(mtcp, stream); 587 588 if (stream->have_reset) { 589 handled++; 590 if (stream->state != TCP_ST_CLOSED_RSVD) { 591 stream->close_reason = TCP_RESET; 592 stream->state = TCP_ST_CLOSED_RSVD; 593 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 594 TRACE_STATE("Stream %d: TCP_ST_CLOSED_RSVD\n", stream->id); 595 DestroyTCPStream(mtcp, stream); 596 } else { 597 TRACE_ERROR("Stream already closed.\n"); 598 } 599 600 } else if (sndvar->on_control_list) { 601 sndvar->on_closeq_int = TRUE; 602 StreamInternalEnqueue(mtcp->closeq_int, stream); 603 delayed++; 604 if (sndvar->on_control_list) 605 control++; 606 if (sndvar->on_send_list) 607 send++; 608 if (sndvar->on_ack_list) 609 ack++; 610 611 } else if (sndvar->on_send_list || sndvar->on_ack_list) { 612 handled++; 613 if (stream->state == TCP_ST_ESTABLISHED) { 614 stream->state = TCP_ST_FIN_WAIT_1; 615 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 616 TRACE_STATE("Stream %d: TCP_ST_FIN_WAIT_1\n", stream->id); 617 618 } else if (stream->state == TCP_ST_CLOSE_WAIT) { 619 stream->state = TCP_ST_LAST_ACK; 620 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 621 TRACE_STATE("Stream %d: TCP_ST_LAST_ACK\n", stream->id); 622 } 623 stream->control_list_waiting = TRUE; 624 625 } else if (stream->state != TCP_ST_CLOSED_RSVD) { 626 handled++; 627 if (stream->state == TCP_ST_ESTABLISHED) { 628 stream->state = TCP_ST_FIN_WAIT_1; 629 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 630 TRACE_STATE("Stream %d: TCP_ST_FIN_WAIT_1\n", stream->id); 631 632 } else if (stream->state == TCP_ST_CLOSE_WAIT) { 633 stream->state = TCP_ST_LAST_ACK; 634 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 635 TRACE_STATE("Stream %d: TCP_ST_LAST_ACK\n", stream->id); 636 } 637 //sndvar->rto = TCP_FIN_RTO; 638 //UpdateRetransmissionTimer(mtcp, stream, mtcp->cur_ts); 639 AddtoControlList(mtcp, stream, cur_ts); 640 } else { 641 TRACE_ERROR("Already closed connection!\n"); 642 } 643 } 644 TRACE_ROUND("Handling close connections. cnt: %d\n", cnt); 645 646 cnt = 0; 647 max_cnt = mtcp->closeq_int->count; 648 while (cnt++ < max_cnt) { 649 stream = StreamInternalDequeue(mtcp->closeq_int); 650 651 if (stream->sndvar->on_control_list) { 652 StreamInternalEnqueue(mtcp->closeq_int, stream); 653 654 } else if (stream->state != TCP_ST_CLOSED_RSVD) { 655 handled++; 656 stream->sndvar->on_closeq_int = FALSE; 657 if (stream->state == TCP_ST_ESTABLISHED) { 658 stream->state = TCP_ST_FIN_WAIT_1; 659 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 660 TRACE_STATE("Stream %d: TCP_ST_FIN_WAIT_1\n", stream->id); 661 662 } else if (stream->state == TCP_ST_CLOSE_WAIT) { 663 stream->state = TCP_ST_LAST_ACK; 664 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 665 TRACE_STATE("Stream %d: TCP_ST_LAST_ACK\n", stream->id); 666 } 667 AddtoControlList(mtcp, stream, cur_ts); 668 } else { 669 stream->sndvar->on_closeq_int = FALSE; 670 TRACE_ERROR("Already closed connection!\n"); 671 } 672 } 673 674 /* reset handling */ 675 while ((stream = StreamDequeue(mtcp->resetq))) { 676 stream->sndvar->on_resetq = FALSE; 677 678 if (g_config.mos->tcp_timeout > 0) 679 RemoveFromTimeoutList(mtcp, stream); 680 681 if (stream->have_reset) { 682 if (stream->state != TCP_ST_CLOSED_RSVD) { 683 stream->close_reason = TCP_RESET; 684 stream->state = TCP_ST_CLOSED_RSVD; 685 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 686 TRACE_STATE("Stream %d: TCP_ST_CLOSED_RSVD\n", stream->id); 687 DestroyTCPStream(mtcp, stream); 688 } else { 689 TRACE_ERROR("Stream already closed.\n"); 690 } 691 692 } else if (stream->sndvar->on_control_list || 693 stream->sndvar->on_send_list || stream->sndvar->on_ack_list) { 694 /* wait until all the queues are flushed */ 695 stream->sndvar->on_resetq_int = TRUE; 696 StreamInternalEnqueue(mtcp->resetq_int, stream); 697 698 } else { 699 if (stream->state != TCP_ST_CLOSED_RSVD) { 700 stream->close_reason = TCP_ACTIVE_CLOSE; 701 stream->state = TCP_ST_CLOSED_RSVD; 702 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 703 TRACE_STATE("Stream %d: TCP_ST_CLOSED_RSVD\n", stream->id); 704 AddtoControlList(mtcp, stream, cur_ts); 705 } else { 706 TRACE_ERROR("Stream already closed.\n"); 707 } 708 } 709 } 710 TRACE_ROUND("Handling reset connections. cnt: %d\n", cnt); 711 712 cnt = 0; 713 max_cnt = mtcp->resetq_int->count; 714 while (cnt++ < max_cnt) { 715 stream = StreamInternalDequeue(mtcp->resetq_int); 716 717 if (stream->sndvar->on_control_list || 718 stream->sndvar->on_send_list || stream->sndvar->on_ack_list) { 719 /* wait until all the queues are flushed */ 720 StreamInternalEnqueue(mtcp->resetq_int, stream); 721 722 } else { 723 stream->sndvar->on_resetq_int = FALSE; 724 725 if (stream->state != TCP_ST_CLOSED_RSVD) { 726 stream->close_reason = TCP_ACTIVE_CLOSE; 727 stream->state = TCP_ST_CLOSED_RSVD; 728 stream->cb_events |= MOS_ON_TCP_STATE_CHANGE; 729 TRACE_STATE("Stream %d: TCP_ST_CLOSED_RSVD\n", stream->id); 730 AddtoControlList(mtcp, stream, cur_ts); 731 } else { 732 TRACE_ERROR("Stream already closed.\n"); 733 } 734 } 735 } 736 737 /* destroy streams in destroyq */ 738 while ((stream = StreamDequeue(mtcp->destroyq))) { 739 DestroyTCPStream(mtcp, stream); 740 } 741 742 mtcp->wakeup_flag = FALSE; 743 } 744 /*----------------------------------------------------------------------------*/ 745 static inline void 746 WritePacketsToChunks(mtcp_manager_t mtcp, uint32_t cur_ts) 747 { 748 int thresh = g_config.mos->max_concurrency; 749 int i; 750 751 /* Set the threshold to g_config.mos->max_concurrency to send ACK immediately */ 752 /* Otherwise, set to appropriate value (e.g. thresh) */ 753 assert(mtcp->g_sender != NULL); 754 if (mtcp->g_sender->control_list_cnt) 755 WriteTCPControlList(mtcp, mtcp->g_sender, cur_ts, thresh); 756 if (mtcp->g_sender->ack_list_cnt) 757 WriteTCPACKList(mtcp, mtcp->g_sender, cur_ts, thresh); 758 if (mtcp->g_sender->send_list_cnt) 759 WriteTCPDataList(mtcp, mtcp->g_sender, cur_ts, thresh); 760 761 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 762 assert(mtcp->n_sender[i] != NULL); 763 if (mtcp->n_sender[i]->control_list_cnt) 764 WriteTCPControlList(mtcp, mtcp->n_sender[i], cur_ts, thresh); 765 if (mtcp->n_sender[i]->ack_list_cnt) 766 WriteTCPACKList(mtcp, mtcp->n_sender[i], cur_ts, thresh); 767 if (mtcp->n_sender[i]->send_list_cnt) 768 WriteTCPDataList(mtcp, mtcp->n_sender[i], cur_ts, thresh); 769 } 770 } 771 /*----------------------------------------------------------------------------*/ 772 #if TESTING 773 static int 774 DestroyRemainingFlows(mtcp_manager_t mtcp) 775 { 776 struct hashtable *ht = mtcp->tcp_flow_table; 777 tcp_stream *walk; 778 int cnt, i; 779 780 cnt = 0; 781 782 thread_printf(mtcp, mtcp->log_fp, 783 "CPU %d: Flushing remaining flows.\n", mtcp->ctx->cpu); 784 785 for (i = 0; i < NUM_BINS; i++) { 786 TAILQ_FOREACH(walk, &ht->ht_table[i], rcvvar->he_link) { 787 thread_printf(mtcp, mtcp->log_fp, 788 "CPU %d: Destroying stream %d\n", mtcp->ctx->cpu, walk->id); 789 #ifdef DUMP_STREAM 790 DumpStream(mtcp, walk); 791 #endif 792 DestroyTCPStream(mtcp, walk); 793 cnt++; 794 } 795 } 796 797 return cnt; 798 } 799 #endif 800 /*----------------------------------------------------------------------------*/ 801 static void 802 InterruptApplication(mtcp_manager_t mtcp) 803 { 804 /* interrupt if the mtcp_epoll_wait() is waiting */ 805 if (mtcp->ep) { 806 pthread_mutex_lock(&mtcp->ep->epoll_lock); 807 if (mtcp->ep->waiting) { 808 pthread_cond_signal(&mtcp->ep->epoll_cond); 809 } 810 pthread_mutex_unlock(&mtcp->ep->epoll_lock); 811 } 812 /* interrupt if the accept() is waiting */ 813 if (mtcp->listener) { 814 if (mtcp->listener->socket) { 815 pthread_mutex_lock(&mtcp->listener->accept_lock); 816 if (!(mtcp->listener->socket->opts & MTCP_NONBLOCK)) { 817 pthread_cond_signal(&mtcp->listener->accept_cond); 818 } 819 pthread_mutex_unlock(&mtcp->listener->accept_lock); 820 } 821 } 822 } 823 /*----------------------------------------------------------------------------*/ 824 void 825 RunPassiveLoop(mtcp_manager_t mtcp) 826 { 827 sem_wait(&g_done_sem[mtcp->ctx->cpu]); 828 sem_destroy(&g_done_sem[mtcp->ctx->cpu]); 829 return; 830 } 831 /*----------------------------------------------------------------------------*/ 832 static void 833 RunMainLoop(struct mtcp_thread_context *ctx) 834 { 835 mtcp_manager_t mtcp = ctx->mtcp_manager; 836 int i; 837 int recv_cnt; 838 int rx_inf, tx_inf; 839 struct timeval cur_ts = {0}; 840 uint32_t ts, ts_prev; 841 842 #if TIME_STAT 843 struct timeval prev_ts, processing_ts, tcheck_ts, 844 epoll_ts, handle_ts, xmit_ts, select_ts; 845 #endif 846 int thresh; 847 848 gettimeofday(&cur_ts, NULL); 849 850 TRACE_DBG("CPU %d: mtcp thread running.\n", ctx->cpu); 851 852 #if TIME_STAT 853 prev_ts = cur_ts; 854 InitStatCounter(&mtcp->rtstat.round); 855 InitStatCounter(&mtcp->rtstat.processing); 856 InitStatCounter(&mtcp->rtstat.tcheck); 857 InitStatCounter(&mtcp->rtstat.epoll); 858 InitStatCounter(&mtcp->rtstat.handle); 859 InitStatCounter(&mtcp->rtstat.xmit); 860 InitStatCounter(&mtcp->rtstat.select); 861 #endif 862 863 ts = ts_prev = 0; 864 while ((!ctx->done || mtcp->flow_cnt) && !ctx->exit) { 865 866 STAT_COUNT(mtcp->runstat.rounds); 867 recv_cnt = 0; 868 gettimeofday(&cur_ts, NULL); 869 #if TIME_STAT 870 /* measure the inter-round delay */ 871 UpdateStatCounter(&mtcp->rtstat.round, TimeDiffUs(&cur_ts, &prev_ts)); 872 prev_ts = cur_ts; 873 #endif 874 875 ts = TIMEVAL_TO_TS(&cur_ts); 876 mtcp->cur_ts = ts; 877 878 for (rx_inf = 0; rx_inf < g_config.mos->netdev_table->num; rx_inf++) { 879 880 recv_cnt = mtcp->iom->recv_pkts(ctx, rx_inf); 881 STAT_COUNT(mtcp->runstat.rounds_rx_try); 882 883 for (i = 0; i < recv_cnt; i++) { 884 uint16_t len; 885 uint8_t *pktbuf; 886 pktbuf = mtcp->iom->get_rptr(mtcp->ctx, rx_inf, i, &len); 887 ProcessPacket(mtcp, rx_inf, i, ts, pktbuf, len); 888 } 889 890 #ifdef ENABLE_DPDKR 891 mtcp->iom->send_pkts(ctx, rx_inf); 892 continue; 893 #endif 894 } 895 STAT_COUNT(mtcp->runstat.rounds_rx); 896 897 #if TIME_STAT 898 gettimeofday(&processing_ts, NULL); 899 UpdateStatCounter(&mtcp->rtstat.processing, 900 TimeDiffUs(&processing_ts, &cur_ts)); 901 #endif /* TIME_STAT */ 902 903 /* Handle user defined timeout */ 904 struct timer *walk, *tmp; 905 for (walk = TAILQ_FIRST(&mtcp->timer_list); walk != NULL; walk = tmp) { 906 tmp = TAILQ_NEXT(walk, timer_link); 907 if (TIMEVAL_LT(&cur_ts, &walk->exp)) 908 break; 909 910 struct mtcp_context mctx = {.cpu = ctx->cpu}; 911 walk->cb(&mctx, walk->id, 0, 0 /* FIXME */, NULL); 912 DelTimer(mtcp, walk); 913 } 914 915 /* interaction with application */ 916 if (mtcp->flow_cnt > 0) { 917 918 /* check retransmission timeout and timewait expire */ 919 #if 0 920 thresh = (int)mtcp->flow_cnt / (TS_TO_USEC(PER_STREAM_TCHECK)); 921 assert(thresh >= 0); 922 if (thresh == 0) 923 thresh = 1; 924 if (recv_cnt > 0 && thresh > recv_cnt) 925 thresh = recv_cnt; 926 #else 927 thresh = g_config.mos->max_concurrency; 928 #endif 929 930 /* Eunyoung, you may fix this later 931 * if there is no rcv packet, we will send as much as possible 932 */ 933 if (thresh == -1) 934 thresh = g_config.mos->max_concurrency; 935 936 CheckRtmTimeout(mtcp, ts, thresh); 937 CheckTimewaitExpire(mtcp, ts, thresh); 938 939 if (g_config.mos->tcp_timeout > 0 && ts != ts_prev) { 940 CheckConnectionTimeout(mtcp, ts, thresh); 941 } 942 943 #if TIME_STAT 944 } 945 gettimeofday(&tcheck_ts, NULL); 946 UpdateStatCounter(&mtcp->rtstat.tcheck, 947 TimeDiffUs(&tcheck_ts, &processing_ts)); 948 949 if (mtcp->flow_cnt > 0) { 950 #endif /* TIME_STAT */ 951 952 } 953 954 /* 955 * before flushing epoll events, call monitor events for 956 * all registered `read` events 957 */ 958 if (mtcp->num_msp > 0) 959 /* call this when only a standalone monitor is running */ 960 FlushMonitorReadEvents(mtcp); 961 962 /* if epoll is in use, flush all the queued events */ 963 if (mtcp->ep) { 964 FlushBufferedReadEvents(mtcp); 965 FlushEpollEvents(mtcp, ts); 966 } 967 #if TIME_STAT 968 gettimeofday(&epoll_ts, NULL); 969 UpdateStatCounter(&mtcp->rtstat.epoll, 970 TimeDiffUs(&epoll_ts, &tcheck_ts)); 971 #endif /* TIME_STAT */ 972 973 if (end_app_exists && mtcp->flow_cnt > 0) { 974 /* handle stream queues */ 975 HandleApplicationCalls(mtcp, ts); 976 } 977 978 #ifdef ENABLE_DPDKR 979 continue; 980 #endif 981 982 #if TIME_STAT 983 gettimeofday(&handle_ts, NULL); 984 UpdateStatCounter(&mtcp->rtstat.handle, 985 TimeDiffUs(&handle_ts, &epoll_ts)); 986 #endif /* TIME_STAT */ 987 988 WritePacketsToChunks(mtcp, ts); 989 990 /* send packets from write buffer */ 991 /* Send until tx is available */ 992 int num_dev = g_config.mos->netdev_table->num; 993 if (likely(mtcp->iom->send_pkts != NULL)) 994 for (tx_inf = 0; tx_inf < num_dev; tx_inf++) { 995 mtcp->iom->send_pkts(ctx, tx_inf); 996 } 997 998 #if TIME_STAT 999 gettimeofday(&xmit_ts, NULL); 1000 UpdateStatCounter(&mtcp->rtstat.xmit, 1001 TimeDiffUs(&xmit_ts, &handle_ts)); 1002 #endif /* TIME_STAT */ 1003 1004 if (ts != ts_prev) { 1005 ts_prev = ts; 1006 #ifdef NETSTAT 1007 if (ctx->cpu == printer) { 1008 #ifdef RUN_ARP 1009 ARPTimer(mtcp, ts); 1010 #endif 1011 #ifdef NETSTAT 1012 PrintNetworkStats(mtcp, ts); 1013 #endif 1014 } 1015 #endif /* NETSTAT */ 1016 } 1017 1018 if (mtcp->iom->select) 1019 mtcp->iom->select(ctx); 1020 1021 if (ctx->interrupt) { 1022 InterruptApplication(mtcp); 1023 } 1024 } 1025 1026 #if TESTING 1027 DestroyRemainingFlows(mtcp); 1028 #endif 1029 1030 TRACE_DBG("MTCP thread %d out of main loop.\n", ctx->cpu); 1031 /* flush logs */ 1032 flush_log_data(mtcp); 1033 TRACE_DBG("MTCP thread %d flushed logs.\n", ctx->cpu); 1034 InterruptApplication(mtcp); 1035 TRACE_INFO("MTCP thread %d finished.\n", ctx->cpu); 1036 } 1037 /*----------------------------------------------------------------------------*/ 1038 struct mtcp_sender * 1039 CreateMTCPSender(int ifidx) 1040 { 1041 struct mtcp_sender *sender; 1042 1043 sender = (struct mtcp_sender *)calloc(1, sizeof(struct mtcp_sender)); 1044 if (!sender) { 1045 return NULL; 1046 } 1047 1048 sender->ifidx = ifidx; 1049 1050 TAILQ_INIT(&sender->control_list); 1051 TAILQ_INIT(&sender->send_list); 1052 TAILQ_INIT(&sender->ack_list); 1053 1054 sender->control_list_cnt = 0; 1055 sender->send_list_cnt = 0; 1056 sender->ack_list_cnt = 0; 1057 1058 return sender; 1059 } 1060 /*----------------------------------------------------------------------------*/ 1061 void 1062 DestroyMTCPSender(struct mtcp_sender *sender) 1063 { 1064 free(sender); 1065 } 1066 /*----------------------------------------------------------------------------*/ 1067 static mtcp_manager_t 1068 InitializeMTCPManager(struct mtcp_thread_context* ctx) 1069 { 1070 mtcp_manager_t mtcp; 1071 char log_name[MAX_FILE_NAME]; 1072 int i; 1073 1074 posix_seq_srand((unsigned)pthread_self()); 1075 1076 mtcp = (mtcp_manager_t)calloc(1, sizeof(struct mtcp_manager)); 1077 if (!mtcp) { 1078 perror("malloc"); 1079 CTRACE_ERROR("Failed to allocate mtcp_manager.\n"); 1080 return NULL; 1081 } 1082 g_mtcp[ctx->cpu] = mtcp; 1083 1084 mtcp->tcp_flow_table = CreateHashtable(); 1085 if (!mtcp->tcp_flow_table) { 1086 CTRACE_ERROR("Falied to allocate tcp flow table.\n"); 1087 return NULL; 1088 } 1089 1090 #ifdef HUGEPAGE 1091 #define IS_HUGEPAGE 1 1092 #else 1093 #define IS_HUGEPAGE 0 1094 #endif 1095 if (mon_app_exists) { 1096 /* initialize event callback */ 1097 #ifdef NEWEV 1098 InitEvent(mtcp); 1099 #else 1100 InitEvent(mtcp, NUM_EV_TABLE); 1101 #endif 1102 } 1103 1104 if (!(mtcp->bufseg_pool = MPCreate(sizeof(tcpbufseg_t), 1105 sizeof(tcpbufseg_t) * g_config.mos->max_concurrency * 1106 ((g_config.mos->rmem_size - 1) / UNITBUFSIZE + 1), 0))) { 1107 TRACE_ERROR("Failed to allocate ev_table pool\n"); 1108 exit(0); 1109 } 1110 if (!(mtcp->sockent_pool = MPCreate(sizeof(struct sockent), 1111 sizeof(struct sockent) * g_config.mos->max_concurrency * 3, 0))) { 1112 TRACE_ERROR("Failed to allocate ev_table pool\n"); 1113 exit(0); 1114 } 1115 #ifdef USE_TIMER_POOL 1116 if (!(mtcp->timer_pool = MPCreate(sizeof(struct timer), 1117 sizeof(struct timer) * g_config.mos->max_concurrency * 10, 0))) { 1118 TRACE_ERROR("Failed to allocate ev_table pool\n"); 1119 exit(0); 1120 } 1121 #endif 1122 mtcp->flow_pool = MPCreate(sizeof(tcp_stream), 1123 sizeof(tcp_stream) * g_config.mos->max_concurrency, IS_HUGEPAGE); 1124 if (!mtcp->flow_pool) { 1125 CTRACE_ERROR("Failed to allocate tcp flow pool.\n"); 1126 return NULL; 1127 } 1128 mtcp->rv_pool = MPCreate(sizeof(struct tcp_recv_vars), 1129 sizeof(struct tcp_recv_vars) * g_config.mos->max_concurrency, IS_HUGEPAGE); 1130 if (!mtcp->rv_pool) { 1131 CTRACE_ERROR("Failed to allocate tcp recv variable pool.\n"); 1132 return NULL; 1133 } 1134 mtcp->sv_pool = MPCreate(sizeof(struct tcp_send_vars), 1135 sizeof(struct tcp_send_vars) * g_config.mos->max_concurrency, IS_HUGEPAGE); 1136 if (!mtcp->sv_pool) { 1137 CTRACE_ERROR("Failed to allocate tcp send variable pool.\n"); 1138 return NULL; 1139 } 1140 1141 mtcp->rbm_snd = SBManagerCreate(g_config.mos->wmem_size, g_config.mos->no_ring_buffers, 1142 g_config.mos->max_concurrency); 1143 if (!mtcp->rbm_snd) { 1144 CTRACE_ERROR("Failed to create send ring buffer.\n"); 1145 return NULL; 1146 } 1147 1148 mtcp->smap = (socket_map_t)calloc(g_config.mos->max_concurrency, sizeof(struct socket_map)); 1149 if (!mtcp->smap) { 1150 perror("calloc"); 1151 CTRACE_ERROR("Failed to allocate memory for stream map.\n"); 1152 return NULL; 1153 } 1154 1155 if (mon_app_exists) { 1156 mtcp->msmap = (socket_map_t)calloc(g_config.mos->max_concurrency, sizeof(struct socket_map)); 1157 if (!mtcp->msmap) { 1158 perror("calloc"); 1159 CTRACE_ERROR("Failed to allocate memory for monitor stream map.\n"); 1160 return NULL; 1161 } 1162 1163 for (i = 0; i < g_config.mos->max_concurrency; i++) { 1164 mtcp->msmap[i].monitor_stream = calloc(1, sizeof(struct mon_stream)); 1165 if (!mtcp->msmap[i].monitor_stream) { 1166 perror("calloc"); 1167 CTRACE_ERROR("Failed to allocate memory for monitr stream map\n"); 1168 return NULL; 1169 } 1170 } 1171 } 1172 1173 TAILQ_INIT(&mtcp->timer_list); 1174 TAILQ_INIT(&mtcp->monitors); 1175 1176 TAILQ_INIT(&mtcp->free_smap); 1177 for (i = 0; i < g_config.mos->max_concurrency; i++) { 1178 mtcp->smap[i].id = i; 1179 mtcp->smap[i].socktype = MOS_SOCK_UNUSED; 1180 memset(&mtcp->smap[i].saddr, 0, sizeof(struct sockaddr_in)); 1181 mtcp->smap[i].stream = NULL; 1182 TAILQ_INSERT_TAIL(&mtcp->free_smap, &mtcp->smap[i], link); 1183 } 1184 1185 if (mon_app_exists) { 1186 TAILQ_INIT(&mtcp->free_msmap); 1187 for (i = 0; i < g_config.mos->max_concurrency; i++) { 1188 mtcp->msmap[i].id = i; 1189 mtcp->msmap[i].socktype = MOS_SOCK_UNUSED; 1190 memset(&mtcp->msmap[i].saddr, 0, sizeof(struct sockaddr_in)); 1191 TAILQ_INSERT_TAIL(&mtcp->free_msmap, &mtcp->msmap[i], link); 1192 } 1193 } 1194 1195 mtcp->ctx = ctx; 1196 mtcp->ep = NULL; 1197 1198 snprintf(log_name, MAX_FILE_NAME, "%s/"LOG_FILE_NAME"_%d", 1199 g_config.mos->mos_log, ctx->cpu); 1200 mtcp->log_fp = fopen(log_name, "w+"); 1201 if (!mtcp->log_fp) { 1202 perror("fopen"); 1203 CTRACE_ERROR("Failed to create file for logging. (%s)\n", log_name); 1204 return NULL; 1205 } 1206 mtcp->sp_fd = g_logctx[ctx->cpu]->pair_sp_fd; 1207 mtcp->logger = g_logctx[ctx->cpu]; 1208 1209 mtcp->connectq = CreateStreamQueue(BACKLOG_SIZE); 1210 if (!mtcp->connectq) { 1211 CTRACE_ERROR("Failed to create connect queue.\n"); 1212 return NULL; 1213 } 1214 mtcp->sendq = CreateStreamQueue(g_config.mos->max_concurrency); 1215 if (!mtcp->sendq) { 1216 CTRACE_ERROR("Failed to create send queue.\n"); 1217 return NULL; 1218 } 1219 mtcp->ackq = CreateStreamQueue(g_config.mos->max_concurrency); 1220 if (!mtcp->ackq) { 1221 CTRACE_ERROR("Failed to create ack queue.\n"); 1222 return NULL; 1223 } 1224 mtcp->closeq = CreateStreamQueue(g_config.mos->max_concurrency); 1225 if (!mtcp->closeq) { 1226 CTRACE_ERROR("Failed to create close queue.\n"); 1227 return NULL; 1228 } 1229 mtcp->closeq_int = CreateInternalStreamQueue(g_config.mos->max_concurrency); 1230 if (!mtcp->closeq_int) { 1231 CTRACE_ERROR("Failed to create close queue.\n"); 1232 return NULL; 1233 } 1234 mtcp->resetq = CreateStreamQueue(g_config.mos->max_concurrency); 1235 if (!mtcp->resetq) { 1236 CTRACE_ERROR("Failed to create reset queue.\n"); 1237 return NULL; 1238 } 1239 mtcp->resetq_int = CreateInternalStreamQueue(g_config.mos->max_concurrency); 1240 if (!mtcp->resetq_int) { 1241 CTRACE_ERROR("Failed to create reset queue.\n"); 1242 return NULL; 1243 } 1244 mtcp->destroyq = CreateStreamQueue(g_config.mos->max_concurrency); 1245 if (!mtcp->destroyq) { 1246 CTRACE_ERROR("Failed to create destroy queue.\n"); 1247 return NULL; 1248 } 1249 1250 mtcp->g_sender = CreateMTCPSender(-1); 1251 if (!mtcp->g_sender) { 1252 CTRACE_ERROR("Failed to create global sender structure.\n"); 1253 return NULL; 1254 } 1255 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 1256 mtcp->n_sender[i] = CreateMTCPSender(i); 1257 if (!mtcp->n_sender[i]) { 1258 CTRACE_ERROR("Failed to create per-nic sender structure.\n"); 1259 return NULL; 1260 } 1261 } 1262 1263 mtcp->rto_store = InitRTOHashstore(); 1264 TAILQ_INIT(&mtcp->timewait_list); 1265 TAILQ_INIT(&mtcp->timeout_list); 1266 1267 return mtcp; 1268 } 1269 /*----------------------------------------------------------------------------*/ 1270 static void * 1271 MTCPRunThread(void *arg) 1272 { 1273 mctx_t mctx = (mctx_t)arg; 1274 int cpu = mctx->cpu; 1275 int working; 1276 struct mtcp_manager *mtcp; 1277 struct mtcp_thread_context *ctx; 1278 1279 /* affinitize the thread to this core first */ 1280 mtcp_core_affinitize(cpu); 1281 1282 /* memory alloc after core affinitization would use local memory 1283 most time */ 1284 ctx = calloc(1, sizeof(*ctx)); 1285 if (!ctx) { 1286 perror("calloc"); 1287 TRACE_ERROR("Failed to calloc mtcp context.\n"); 1288 exit(-1); 1289 } 1290 ctx->thread = pthread_self(); 1291 ctx->cpu = cpu; 1292 mtcp = ctx->mtcp_manager = InitializeMTCPManager(ctx); 1293 if (!mtcp) { 1294 TRACE_ERROR("Failed to initialize mtcp manager.\n"); 1295 exit(-1); 1296 } 1297 1298 /* assign mtcp context's underlying I/O module */ 1299 mtcp->iom = current_iomodule_func; 1300 1301 /* I/O initializing */ 1302 if (mtcp->iom->init_handle) 1303 mtcp->iom->init_handle(ctx); 1304 1305 if (pthread_mutex_init(&ctx->flow_pool_lock, NULL)) { 1306 perror("pthread_mutex_init of ctx->flow_pool_lock\n"); 1307 exit(-1); 1308 } 1309 1310 if (pthread_mutex_init(&ctx->socket_pool_lock, NULL)) { 1311 perror("pthread_mutex_init of ctx->socket_pool_lock\n"); 1312 exit(-1); 1313 } 1314 1315 SQ_LOCK_INIT(&ctx->connect_lock, "ctx->connect_lock", exit(-1)); 1316 SQ_LOCK_INIT(&ctx->close_lock, "ctx->close_lock", exit(-1)); 1317 SQ_LOCK_INIT(&ctx->reset_lock, "ctx->reset_lock", exit(-1)); 1318 SQ_LOCK_INIT(&ctx->sendq_lock, "ctx->sendq_lock", exit(-1)); 1319 SQ_LOCK_INIT(&ctx->ackq_lock, "ctx->ackq_lock", exit(-1)); 1320 SQ_LOCK_INIT(&ctx->destroyq_lock, "ctx->destroyq_lock", exit(-1)); 1321 1322 /* remember this context pointer for signal processing */ 1323 g_pctx[cpu] = ctx; 1324 mlockall(MCL_CURRENT); 1325 1326 // attach (nic device, queue) 1327 working = AttachDevice(ctx); 1328 if (working != 0) { 1329 sem_post(&g_init_sem[ctx->cpu]); 1330 TRACE_DBG("MTCP thread %d finished. Not attached any device\n", ctx->cpu); 1331 pthread_exit(NULL); 1332 } 1333 1334 TRACE_DBG("CPU %d: initialization finished.\n", cpu); 1335 sem_post(&g_init_sem[ctx->cpu]); 1336 1337 /* start the main loop */ 1338 RunMainLoop(ctx); 1339 1340 TRACE_DBG("MTCP thread %d finished.\n", ctx->cpu); 1341 1342 /* signaling mTCP thread is done */ 1343 sem_post(&g_done_sem[mctx->cpu]); 1344 1345 //pthread_exit(NULL); 1346 return 0; 1347 } 1348 /*----------------------------------------------------------------------------*/ 1349 #ifdef ENABLE_DPDK 1350 static int MTCPDPDKRunThread(void *arg) 1351 { 1352 MTCPRunThread(arg); 1353 return 0; 1354 } 1355 #endif /* !ENABLE_DPDK */ 1356 /*----------------------------------------------------------------------------*/ 1357 mctx_t 1358 mtcp_create_context(int cpu) 1359 { 1360 mctx_t mctx; 1361 int ret; 1362 1363 if (cpu >= g_config.mos->num_cores) { 1364 TRACE_ERROR("Failed initialize new mtcp context. " 1365 "Requested cpu id %d exceed the number of cores %d configured to use.\n", 1366 cpu, g_config.mos->num_cores); 1367 return NULL; 1368 } 1369 1370 /* check if mtcp_create_context() was already initialized */ 1371 if (g_logctx[cpu] != NULL) { 1372 TRACE_ERROR("%s was already initialized before!\n", 1373 __FUNCTION__); 1374 return NULL; 1375 } 1376 1377 ret = sem_init(&g_init_sem[cpu], 0, 0); 1378 if (ret) { 1379 TRACE_ERROR("Failed initialize init_sem.\n"); 1380 return NULL; 1381 } 1382 1383 ret = sem_init(&g_done_sem[cpu], 0, 0); 1384 if (ret) { 1385 TRACE_ERROR("Failed initialize done_sem.\n"); 1386 return NULL; 1387 } 1388 1389 mctx = (mctx_t)calloc(1, sizeof(struct mtcp_context)); 1390 if (!mctx) { 1391 TRACE_ERROR("Failed to allocate memory for mtcp_context.\n"); 1392 return NULL; 1393 } 1394 mctx->cpu = cpu; 1395 g_ctx[cpu] = mctx; 1396 1397 /* initialize logger */ 1398 g_logctx[cpu] = (struct log_thread_context *) 1399 calloc(1, sizeof(struct log_thread_context)); 1400 if (!g_logctx[cpu]) { 1401 perror("malloc"); 1402 TRACE_ERROR("Failed to allocate memory for log thread context.\n"); 1403 return NULL; 1404 } 1405 InitLogThreadContext(g_logctx[cpu], cpu); 1406 if (pthread_create(&log_thread[cpu], 1407 NULL, ThreadLogMain, (void *)g_logctx[cpu])) { 1408 perror("pthread_create"); 1409 TRACE_ERROR("Failed to create log thread\n"); 1410 return NULL; 1411 } 1412 1413 #ifdef ENABLE_DPDK 1414 /* Wake up mTCP threads (wake up I/O threads) */ 1415 if (current_iomodule_func == &dpdk_module_func) { 1416 int master; 1417 master = rte_get_master_lcore(); 1418 if (master == cpu) { 1419 lcore_config[master].ret = 0; 1420 lcore_config[master].state = FINISHED; 1421 if (pthread_create(&g_thread[cpu], 1422 NULL, MTCPRunThread, (void *)mctx) != 0) { 1423 TRACE_ERROR("pthread_create of mtcp thread failed!\n"); 1424 return NULL; 1425 } 1426 } else 1427 rte_eal_remote_launch(MTCPDPDKRunThread, mctx, cpu); 1428 } else 1429 #endif /* !ENABLE_DPDK */ 1430 { 1431 if (pthread_create(&g_thread[cpu], 1432 NULL, MTCPRunThread, (void *)mctx) != 0) { 1433 TRACE_ERROR("pthread_create of mtcp thread failed!\n"); 1434 return NULL; 1435 } 1436 } 1437 1438 sem_wait(&g_init_sem[cpu]); 1439 sem_destroy(&g_init_sem[cpu]); 1440 1441 running[cpu] = TRUE; 1442 1443 #ifdef NETSTAT 1444 #if NETSTAT_TOTAL 1445 if (printer < 0) { 1446 printer = cpu; 1447 TRACE_INFO("CPU %d is in charge of printing stats.\n", printer); 1448 } 1449 #endif 1450 #endif 1451 1452 return mctx; 1453 } 1454 /*----------------------------------------------------------------------------*/ 1455 /** 1456 * TODO: It currently always returns 0. Add appropriate error return values 1457 */ 1458 int 1459 mtcp_destroy_context(mctx_t mctx) 1460 { 1461 struct mtcp_thread_context *ctx = g_pctx[mctx->cpu]; 1462 struct mtcp_manager *mtcp = ctx->mtcp_manager; 1463 struct log_thread_context *log_ctx = mtcp->logger; 1464 int ret, i; 1465 1466 TRACE_DBG("CPU %d: mtcp_destroy_context()\n", mctx->cpu); 1467 1468 /* close all stream sockets that are still open */ 1469 if (!ctx->exit) { 1470 for (i = 0; i < g_config.mos->max_concurrency; i++) { 1471 if (mtcp->smap[i].socktype == MOS_SOCK_STREAM) { 1472 TRACE_DBG("Closing remaining socket %d (%s)\n", 1473 i, TCPStateToString(mtcp->smap[i].stream)); 1474 #ifdef DUMP_STREAM 1475 DumpStream(mtcp, mtcp->smap[i].stream); 1476 #endif 1477 mtcp_close(mctx, i); 1478 } 1479 } 1480 } 1481 1482 ctx->done = 1; 1483 1484 //pthread_kill(g_thread[mctx->cpu], SIGINT); 1485 #ifdef ENABLE_DPDK 1486 ctx->exit = 1; 1487 /* XXX - dpdk logic changes */ 1488 if (current_iomodule_func == &dpdk_module_func) { 1489 int master = rte_get_master_lcore(); 1490 if (master == mctx->cpu) 1491 pthread_join(g_thread[mctx->cpu], NULL); 1492 else 1493 rte_eal_wait_lcore(mctx->cpu); 1494 } else 1495 #endif /* !ENABLE_DPDK */ 1496 { 1497 pthread_join(g_thread[mctx->cpu], NULL); 1498 } 1499 1500 TRACE_INFO("MTCP thread %d joined.\n", mctx->cpu); 1501 running[mctx->cpu] = FALSE; 1502 1503 #ifdef NETSTAT 1504 #if NETSTAT_TOTAL 1505 if (printer == mctx->cpu) { 1506 for (i = 0; i < num_cpus; i++) { 1507 if (i != mctx->cpu && running[i]) { 1508 printer = i; 1509 break; 1510 } 1511 } 1512 } 1513 #endif 1514 #endif 1515 1516 log_ctx->done = 1; 1517 ret = write(log_ctx->pair_sp_fd, "F", 1); 1518 if (ret != 1) 1519 TRACE_ERROR("CPU %d: Fail to signal socket pair\n", mctx->cpu); 1520 1521 pthread_join(log_thread[ctx->cpu], NULL); 1522 fclose(mtcp->log_fp); 1523 TRACE_LOG("Log thread %d joined.\n", mctx->cpu); 1524 1525 if (mtcp->connectq) { 1526 DestroyStreamQueue(mtcp->connectq); 1527 mtcp->connectq = NULL; 1528 } 1529 if (mtcp->sendq) { 1530 DestroyStreamQueue(mtcp->sendq); 1531 mtcp->sendq = NULL; 1532 } 1533 if (mtcp->ackq) { 1534 DestroyStreamQueue(mtcp->ackq); 1535 mtcp->ackq = NULL; 1536 } 1537 if (mtcp->closeq) { 1538 DestroyStreamQueue(mtcp->closeq); 1539 mtcp->closeq = NULL; 1540 } 1541 if (mtcp->closeq_int) { 1542 DestroyInternalStreamQueue(mtcp->closeq_int); 1543 mtcp->closeq_int = NULL; 1544 } 1545 if (mtcp->resetq) { 1546 DestroyStreamQueue(mtcp->resetq); 1547 mtcp->resetq = NULL; 1548 } 1549 if (mtcp->resetq_int) { 1550 DestroyInternalStreamQueue(mtcp->resetq_int); 1551 mtcp->resetq_int = NULL; 1552 } 1553 if (mtcp->destroyq) { 1554 DestroyStreamQueue(mtcp->destroyq); 1555 mtcp->destroyq = NULL; 1556 } 1557 1558 DestroyMTCPSender(mtcp->g_sender); 1559 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 1560 DestroyMTCPSender(mtcp->n_sender[i]); 1561 } 1562 1563 MPDestroy(mtcp->rv_pool); 1564 MPDestroy(mtcp->sv_pool); 1565 MPDestroy(mtcp->flow_pool); 1566 1567 if (mtcp->ap) { 1568 DestroyAddressPool(mtcp->ap); 1569 } 1570 1571 SQ_LOCK_DESTROY(&ctx->connect_lock); 1572 SQ_LOCK_DESTROY(&ctx->close_lock); 1573 SQ_LOCK_DESTROY(&ctx->reset_lock); 1574 SQ_LOCK_DESTROY(&ctx->sendq_lock); 1575 SQ_LOCK_DESTROY(&ctx->ackq_lock); 1576 SQ_LOCK_DESTROY(&ctx->destroyq_lock); 1577 1578 //TRACE_INFO("MTCP thread %d destroyed.\n", mctx->cpu); 1579 if (mtcp->iom->destroy_handle) 1580 mtcp->iom->destroy_handle(ctx); 1581 free(ctx); 1582 free(mctx); 1583 1584 return 0; 1585 } 1586 /*----------------------------------------------------------------------------*/ 1587 mtcp_sighandler_t 1588 mtcp_register_signal(int signum, mtcp_sighandler_t handler) 1589 { 1590 mtcp_sighandler_t prev; 1591 1592 if (signum == SIGINT) { 1593 prev = app_signal_handler; 1594 app_signal_handler = handler; 1595 } else { 1596 if ((prev = signal(signum, handler)) == SIG_ERR) { 1597 perror("signal"); 1598 return SIG_ERR; 1599 } 1600 } 1601 1602 return prev; 1603 } 1604 /*----------------------------------------------------------------------------*/ 1605 int 1606 mtcp_getconf(struct mtcp_conf *conf) 1607 { 1608 int i, j; 1609 1610 if (!conf) 1611 return -1; 1612 1613 conf->num_cores = g_config.mos->num_cores; 1614 conf->max_concurrency = g_config.mos->max_concurrency; 1615 conf->cpu_mask = g_config.mos->cpu_mask; 1616 1617 conf->rcvbuf_size = g_config.mos->rmem_size; 1618 conf->sndbuf_size = g_config.mos->wmem_size; 1619 1620 conf->tcp_timewait = g_config.mos->tcp_tw_interval; 1621 conf->tcp_timeout = g_config.mos->tcp_timeout; 1622 1623 i = 0; 1624 struct conf_block *bwalk; 1625 TAILQ_FOREACH(bwalk, &g_config.app_blkh, link) { 1626 struct app_conf *app_conf = (struct app_conf *)bwalk->conf; 1627 for (j = 0; j < app_conf->app_argc; j++) 1628 conf->app_argv[i][j] = app_conf->app_argv[j]; 1629 conf->app_argc[i] = app_conf->app_argc; 1630 conf->app_cpu_mask[i] = app_conf->cpu_mask; 1631 i++; 1632 } 1633 conf->num_app = i; 1634 1635 return 0; 1636 } 1637 /*----------------------------------------------------------------------------*/ 1638 int 1639 mtcp_setconf(const struct mtcp_conf *conf) 1640 { 1641 if (!conf) 1642 return -1; 1643 1644 g_config.mos->num_cores = conf->num_cores; 1645 g_config.mos->max_concurrency = conf->max_concurrency; 1646 1647 g_config.mos->rmem_size = conf->rcvbuf_size; 1648 g_config.mos->wmem_size = conf->sndbuf_size; 1649 1650 g_config.mos->tcp_tw_interval = conf->tcp_timewait; 1651 g_config.mos->tcp_timeout = conf->tcp_timeout; 1652 1653 TRACE_CONFIG("Configuration updated by mtcp_setconf().\n"); 1654 //PrintConfiguration(); 1655 1656 return 0; 1657 } 1658 /*----------------------------------------------------------------------------*/ 1659 int 1660 mtcp_init(const char *config_file) 1661 { 1662 int i; 1663 int ret; 1664 1665 if (geteuid()) { 1666 TRACE_CONFIG("[CAUTION] Run as root if mlock is necessary.\n"); 1667 #if defined(ENABLE_DPDK) || defined(ENABLE_DPDKR) || defined(ENABLE_NETMAP) 1668 TRACE_CONFIG("[CAUTION] Run the app as root!\n"); 1669 exit(EXIT_FAILURE); 1670 #endif 1671 } 1672 1673 /* getting cpu and NIC */ 1674 num_cpus = GetNumCPUs(); 1675 assert(num_cpus >= 1); 1676 for (i = 0; i < num_cpus; i++) { 1677 g_mtcp[i] = NULL; 1678 running[i] = FALSE; 1679 sigint_cnt[i] = 0; 1680 } 1681 1682 ret = LoadConfigurationUpperHalf(config_file); 1683 if (ret) { 1684 TRACE_CONFIG("Error occured while loading configuration.\n"); 1685 return -1; 1686 } 1687 1688 #if defined(ENABLE_PSIO) 1689 current_iomodule_func = &ps_module_func; 1690 #elif defined(ENABLE_DPDK) 1691 current_iomodule_func = &dpdk_module_func; 1692 #elif defined(ENABLE_PCAP) 1693 current_iomodule_func = &pcap_module_func; 1694 #elif defined(ENABLE_DPDKR) 1695 current_iomodule_func = &dpdkr_module_func; 1696 #elif defined(ENABLE_NETMAP) 1697 current_iomodule_func = &netmap_module_func; 1698 #endif 1699 1700 if (current_iomodule_func->load_module_upper_half) 1701 current_iomodule_func->load_module_upper_half(); 1702 1703 LoadConfigurationLowerHalf(); 1704 1705 //PrintConfiguration(); 1706 1707 for (i = 0; i < g_config.mos->netdev_table->num; i++) { 1708 ap[i] = CreateAddressPool(g_config.mos->netdev_table->ent[i]->ip_addr, 1); 1709 if (!ap[i]) { 1710 TRACE_CONFIG("Error occured while create address pool[%d]\n", 1711 i); 1712 return -1; 1713 } 1714 } 1715 1716 //PrintInterfaceInfo(); 1717 //PrintRoutingTable(); 1718 //PrintARPTable(); 1719 InitARPTable(); 1720 1721 if (signal(SIGUSR1, HandleSignal) == SIG_ERR) { 1722 perror("signal, SIGUSR1"); 1723 return -1; 1724 } 1725 if (signal(SIGINT, HandleSignal) == SIG_ERR) { 1726 perror("signal, SIGINT"); 1727 return -1; 1728 } 1729 app_signal_handler = NULL; 1730 1731 printf("load_module(): %p\n", current_iomodule_func); 1732 /* load system-wide io module specs */ 1733 if (current_iomodule_func->load_module_lower_half) 1734 current_iomodule_func->load_module_lower_half(); 1735 1736 GlobInitEvent(); 1737 1738 PrintConf(&g_config); 1739 1740 return 0; 1741 } 1742 /*----------------------------------------------------------------------------*/ 1743 int 1744 mtcp_destroy() 1745 { 1746 int i; 1747 1748 /* wait until all threads are closed */ 1749 for (i = 0; i < num_cpus; i++) { 1750 if (running[i]) { 1751 if (pthread_join(g_thread[i], NULL) != 0) 1752 return -1; 1753 } 1754 } 1755 1756 for (i = 0; i < g_config.mos->netdev_table->num; i++) 1757 DestroyAddressPool(ap[i]); 1758 1759 TRACE_INFO("All MTCP threads are joined.\n"); 1760 1761 return 0; 1762 } 1763 /*----------------------------------------------------------------------------*/ 1764