| 1 | /* |
| 2 | * test_urcu_wfcq.c |
| 3 | * |
| 4 | * Userspace RCU library - example RCU-based lock-free concurrent queue |
| 5 | * |
| 6 | * Copyright February 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * Copyright February 2010 - Paolo Bonzini <pbonzini@redhat.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <pthread.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <stdint.h> |
| 28 | #include <stdbool.h> |
| 29 | #include <string.h> |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/wait.h> |
| 32 | #include <unistd.h> |
| 33 | #include <stdio.h> |
| 34 | #include <assert.h> |
| 35 | #include <errno.h> |
| 36 | |
| 37 | #include <urcu/arch.h> |
| 38 | #include <urcu/tls-compat.h> |
| 39 | #include <urcu/uatomic.h> |
| 40 | #include "cpuset.h" |
| 41 | #include "thread-id.h" |
| 42 | |
| 43 | /* hardcoded number of CPUs */ |
| 44 | #define NR_CPUS 16384 |
| 45 | |
| 46 | #ifndef DYNAMIC_LINK_TEST |
| 47 | #define _LGPL_SOURCE |
| 48 | #endif |
| 49 | #include <urcu/wfcqueue.h> |
| 50 | |
| 51 | enum test_sync { |
| 52 | TEST_SYNC_NONE = 0, |
| 53 | TEST_SYNC_MUTEX, |
| 54 | }; |
| 55 | |
| 56 | static enum test_sync test_sync; |
| 57 | |
| 58 | static int test_force_sync; |
| 59 | |
| 60 | static volatile int test_go, test_stop_enqueue, test_stop_dequeue; |
| 61 | |
| 62 | static unsigned long rduration; |
| 63 | |
| 64 | static unsigned long duration; |
| 65 | |
| 66 | /* read-side C.S. duration, in loops */ |
| 67 | static unsigned long wdelay; |
| 68 | |
| 69 | static inline void loop_sleep(unsigned long loops) |
| 70 | { |
| 71 | while (loops-- != 0) |
| 72 | caa_cpu_relax(); |
| 73 | } |
| 74 | |
| 75 | static int verbose_mode; |
| 76 | |
| 77 | static int test_dequeue, test_splice, test_wait_empty; |
| 78 | static int test_enqueue_stopped; |
| 79 | |
| 80 | #define printf_verbose(fmt, args...) \ |
| 81 | do { \ |
| 82 | if (verbose_mode) \ |
| 83 | printf(fmt, ## args); \ |
| 84 | } while (0) |
| 85 | |
| 86 | static unsigned int cpu_affinities[NR_CPUS]; |
| 87 | static unsigned int next_aff = 0; |
| 88 | static int use_affinity = 0; |
| 89 | |
| 90 | pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 91 | |
| 92 | static void set_affinity(void) |
| 93 | { |
| 94 | #if HAVE_SCHED_SETAFFINITY |
| 95 | cpu_set_t mask; |
| 96 | int cpu, ret; |
| 97 | #endif /* HAVE_SCHED_SETAFFINITY */ |
| 98 | |
| 99 | if (!use_affinity) |
| 100 | return; |
| 101 | |
| 102 | #if HAVE_SCHED_SETAFFINITY |
| 103 | ret = pthread_mutex_lock(&affinity_mutex); |
| 104 | if (ret) { |
| 105 | perror("Error in pthread mutex lock"); |
| 106 | exit(-1); |
| 107 | } |
| 108 | cpu = cpu_affinities[next_aff++]; |
| 109 | ret = pthread_mutex_unlock(&affinity_mutex); |
| 110 | if (ret) { |
| 111 | perror("Error in pthread mutex unlock"); |
| 112 | exit(-1); |
| 113 | } |
| 114 | |
| 115 | CPU_ZERO(&mask); |
| 116 | CPU_SET(cpu, &mask); |
| 117 | #if SCHED_SETAFFINITY_ARGS == 2 |
| 118 | sched_setaffinity(0, &mask); |
| 119 | #else |
| 120 | sched_setaffinity(0, sizeof(mask), &mask); |
| 121 | #endif |
| 122 | #endif /* HAVE_SCHED_SETAFFINITY */ |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * returns 0 if test should end. |
| 127 | */ |
| 128 | static int test_duration_dequeue(void) |
| 129 | { |
| 130 | return !test_stop_dequeue; |
| 131 | } |
| 132 | |
| 133 | static int test_duration_enqueue(void) |
| 134 | { |
| 135 | return !test_stop_enqueue; |
| 136 | } |
| 137 | |
| 138 | static DEFINE_URCU_TLS(unsigned long long, nr_dequeues); |
| 139 | static DEFINE_URCU_TLS(unsigned long long, nr_enqueues); |
| 140 | |
| 141 | static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues); |
| 142 | static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues); |
| 143 | static DEFINE_URCU_TLS(unsigned long long, nr_empty_dest_enqueues); |
| 144 | static DEFINE_URCU_TLS(unsigned long long, nr_splice); |
| 145 | static DEFINE_URCU_TLS(unsigned long long, nr_dequeue_last); |
| 146 | |
| 147 | static unsigned int nr_enqueuers; |
| 148 | static unsigned int nr_dequeuers; |
| 149 | |
| 150 | static struct cds_wfcq_head __attribute__((aligned(CAA_CACHE_LINE_SIZE))) head; |
| 151 | static struct cds_wfcq_tail __attribute__((aligned(CAA_CACHE_LINE_SIZE))) tail; |
| 152 | |
| 153 | static void *thr_enqueuer(void *_count) |
| 154 | { |
| 155 | unsigned long long *count = _count; |
| 156 | bool was_nonempty; |
| 157 | |
| 158 | printf_verbose("thread_begin %s, tid %lu\n", |
| 159 | "enqueuer", urcu_get_thread_id()); |
| 160 | |
| 161 | set_affinity(); |
| 162 | |
| 163 | while (!test_go) |
| 164 | { |
| 165 | } |
| 166 | cmm_smp_mb(); |
| 167 | |
| 168 | for (;;) { |
| 169 | struct cds_wfcq_node *node = malloc(sizeof(*node)); |
| 170 | if (!node) |
| 171 | goto fail; |
| 172 | cds_wfcq_node_init(node); |
| 173 | was_nonempty = cds_wfcq_enqueue(&head, &tail, node); |
| 174 | URCU_TLS(nr_successful_enqueues)++; |
| 175 | if (!was_nonempty) |
| 176 | URCU_TLS(nr_empty_dest_enqueues)++; |
| 177 | |
| 178 | if (caa_unlikely(wdelay)) |
| 179 | loop_sleep(wdelay); |
| 180 | fail: |
| 181 | URCU_TLS(nr_enqueues)++; |
| 182 | if (caa_unlikely(!test_duration_enqueue())) |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | uatomic_inc(&test_enqueue_stopped); |
| 187 | count[0] = URCU_TLS(nr_enqueues); |
| 188 | count[1] = URCU_TLS(nr_successful_enqueues); |
| 189 | count[2] = URCU_TLS(nr_empty_dest_enqueues); |
| 190 | printf_verbose("enqueuer thread_end, tid %lu, " |
| 191 | "enqueues %llu successful_enqueues %llu, " |
| 192 | "empty_dest_enqueues %llu\n", |
| 193 | urcu_get_thread_id(), |
| 194 | URCU_TLS(nr_enqueues), |
| 195 | URCU_TLS(nr_successful_enqueues), |
| 196 | URCU_TLS(nr_empty_dest_enqueues)); |
| 197 | return ((void*)1); |
| 198 | |
| 199 | } |
| 200 | |
| 201 | static void do_test_dequeue(enum test_sync sync) |
| 202 | { |
| 203 | struct cds_wfcq_node *node; |
| 204 | int state; |
| 205 | |
| 206 | if (sync == TEST_SYNC_MUTEX) |
| 207 | node = cds_wfcq_dequeue_with_state_blocking(&head, &tail, |
| 208 | &state); |
| 209 | else |
| 210 | node = __cds_wfcq_dequeue_with_state_blocking(&head, &tail, |
| 211 | &state); |
| 212 | |
| 213 | if (state & CDS_WFCQ_STATE_LAST) |
| 214 | URCU_TLS(nr_dequeue_last)++; |
| 215 | |
| 216 | if (node) { |
| 217 | free(node); |
| 218 | URCU_TLS(nr_successful_dequeues)++; |
| 219 | } |
| 220 | URCU_TLS(nr_dequeues)++; |
| 221 | } |
| 222 | |
| 223 | static void do_test_splice(enum test_sync sync) |
| 224 | { |
| 225 | struct cds_wfcq_head tmp_head; |
| 226 | struct cds_wfcq_tail tmp_tail; |
| 227 | struct cds_wfcq_node *node, *n; |
| 228 | enum cds_wfcq_ret ret; |
| 229 | |
| 230 | cds_wfcq_init(&tmp_head, &tmp_tail); |
| 231 | |
| 232 | if (sync == TEST_SYNC_MUTEX) |
| 233 | ret = cds_wfcq_splice_blocking(&tmp_head, &tmp_tail, |
| 234 | &head, &tail); |
| 235 | else |
| 236 | ret = __cds_wfcq_splice_blocking(&tmp_head, &tmp_tail, |
| 237 | &head, &tail); |
| 238 | |
| 239 | switch (ret) { |
| 240 | case CDS_WFCQ_RET_WOULDBLOCK: |
| 241 | assert(0); /* blocking call */ |
| 242 | break; |
| 243 | case CDS_WFCQ_RET_DEST_EMPTY: |
| 244 | URCU_TLS(nr_splice)++; |
| 245 | URCU_TLS(nr_dequeue_last)++; |
| 246 | /* ok */ |
| 247 | break; |
| 248 | case CDS_WFCQ_RET_DEST_NON_EMPTY: |
| 249 | assert(0); /* entirely unexpected */ |
| 250 | break; |
| 251 | case CDS_WFCQ_RET_SRC_EMPTY: |
| 252 | /* ok, we could even skip iteration on dest if we wanted */ |
| 253 | break; |
| 254 | } |
| 255 | |
| 256 | __cds_wfcq_for_each_blocking_safe(&tmp_head, &tmp_tail, node, n) { |
| 257 | free(node); |
| 258 | URCU_TLS(nr_successful_dequeues)++; |
| 259 | URCU_TLS(nr_dequeues)++; |
| 260 | } |
| 261 | cds_wfcq_destroy(&tmp_head, &tmp_tail); |
| 262 | } |
| 263 | |
| 264 | static void *thr_dequeuer(void *_count) |
| 265 | { |
| 266 | unsigned long long *count = _count; |
| 267 | unsigned int counter = 0; |
| 268 | |
| 269 | printf_verbose("thread_begin %s, tid %lu\n", |
| 270 | "dequeuer", urcu_get_thread_id()); |
| 271 | |
| 272 | set_affinity(); |
| 273 | |
| 274 | while (!test_go) |
| 275 | { |
| 276 | } |
| 277 | cmm_smp_mb(); |
| 278 | |
| 279 | for (;;) { |
| 280 | if (test_dequeue && test_splice) { |
| 281 | if (counter & 1) |
| 282 | do_test_dequeue(test_sync); |
| 283 | else |
| 284 | do_test_splice(test_sync); |
| 285 | counter++; |
| 286 | } else { |
| 287 | if (test_dequeue) |
| 288 | do_test_dequeue(test_sync); |
| 289 | else |
| 290 | do_test_splice(test_sync); |
| 291 | } |
| 292 | if (caa_unlikely(!test_duration_dequeue())) |
| 293 | break; |
| 294 | if (caa_unlikely(rduration)) |
| 295 | loop_sleep(rduration); |
| 296 | } |
| 297 | |
| 298 | printf_verbose("dequeuer thread_end, tid %lu, " |
| 299 | "dequeues %llu, successful_dequeues %llu, " |
| 300 | "nr_splice %llu\n", |
| 301 | urcu_get_thread_id(), |
| 302 | URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues), |
| 303 | URCU_TLS(nr_splice)); |
| 304 | count[0] = URCU_TLS(nr_dequeues); |
| 305 | count[1] = URCU_TLS(nr_successful_dequeues); |
| 306 | count[2] = URCU_TLS(nr_splice); |
| 307 | count[3] = URCU_TLS(nr_dequeue_last); |
| 308 | return ((void*)2); |
| 309 | } |
| 310 | |
| 311 | static void test_end(unsigned long long *nr_dequeues, |
| 312 | unsigned long long *nr_dequeue_last) |
| 313 | { |
| 314 | struct cds_wfcq_node *node; |
| 315 | int state; |
| 316 | |
| 317 | do { |
| 318 | node = cds_wfcq_dequeue_with_state_blocking(&head, &tail, |
| 319 | &state); |
| 320 | if (node) { |
| 321 | if (state & CDS_WFCQ_STATE_LAST) |
| 322 | (*nr_dequeue_last)++; |
| 323 | free(node); |
| 324 | (*nr_dequeues)++; |
| 325 | } |
| 326 | } while (node); |
| 327 | } |
| 328 | |
| 329 | static void show_usage(int argc, char **argv) |
| 330 | { |
| 331 | printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n", |
| 332 | argv[0]); |
| 333 | printf("OPTIONS:\n"); |
| 334 | printf(" [-d delay] (enqueuer period (in loops))\n"); |
| 335 | printf(" [-c duration] (dequeuer period (in loops))\n"); |
| 336 | printf(" [-v] (verbose output)\n"); |
| 337 | printf(" [-a cpu#] [-a cpu#]... (affinity)\n"); |
| 338 | printf(" [-q] (test dequeue)\n"); |
| 339 | printf(" [-s] (test splice, enabled by default)\n"); |
| 340 | printf(" [-M] (use mutex external synchronization)\n"); |
| 341 | printf(" Note: default: no external synchronization used.\n"); |
| 342 | printf(" [-f] (force user-provided synchronization)\n"); |
| 343 | printf(" [-w] Wait for dequeuer to empty queue\n"); |
| 344 | printf("\n"); |
| 345 | } |
| 346 | |
| 347 | int main(int argc, char **argv) |
| 348 | { |
| 349 | int err; |
| 350 | pthread_t *tid_enqueuer, *tid_dequeuer; |
| 351 | void *tret; |
| 352 | unsigned long long *count_enqueuer, *count_dequeuer; |
| 353 | unsigned long long tot_enqueues = 0, tot_dequeues = 0; |
| 354 | unsigned long long tot_successful_enqueues = 0, |
| 355 | tot_successful_dequeues = 0, |
| 356 | tot_empty_dest_enqueues = 0, |
| 357 | tot_splice = 0, tot_dequeue_last = 0; |
| 358 | unsigned long long end_dequeues = 0; |
| 359 | int i, a, retval = 0; |
| 360 | |
| 361 | if (argc < 4) { |
| 362 | show_usage(argc, argv); |
| 363 | return -1; |
| 364 | } |
| 365 | |
| 366 | err = sscanf(argv[1], "%u", &nr_dequeuers); |
| 367 | if (err != 1) { |
| 368 | show_usage(argc, argv); |
| 369 | return -1; |
| 370 | } |
| 371 | |
| 372 | err = sscanf(argv[2], "%u", &nr_enqueuers); |
| 373 | if (err != 1) { |
| 374 | show_usage(argc, argv); |
| 375 | return -1; |
| 376 | } |
| 377 | |
| 378 | err = sscanf(argv[3], "%lu", &duration); |
| 379 | if (err != 1) { |
| 380 | show_usage(argc, argv); |
| 381 | return -1; |
| 382 | } |
| 383 | |
| 384 | for (i = 4; i < argc; i++) { |
| 385 | if (argv[i][0] != '-') |
| 386 | continue; |
| 387 | switch (argv[i][1]) { |
| 388 | case 'a': |
| 389 | if (argc < i + 2) { |
| 390 | show_usage(argc, argv); |
| 391 | return -1; |
| 392 | } |
| 393 | a = atoi(argv[++i]); |
| 394 | cpu_affinities[next_aff++] = a; |
| 395 | use_affinity = 1; |
| 396 | printf_verbose("Adding CPU %d affinity\n", a); |
| 397 | break; |
| 398 | case 'c': |
| 399 | if (argc < i + 2) { |
| 400 | show_usage(argc, argv); |
| 401 | return -1; |
| 402 | } |
| 403 | rduration = atol(argv[++i]); |
| 404 | break; |
| 405 | case 'd': |
| 406 | if (argc < i + 2) { |
| 407 | show_usage(argc, argv); |
| 408 | return -1; |
| 409 | } |
| 410 | wdelay = atol(argv[++i]); |
| 411 | break; |
| 412 | case 'v': |
| 413 | verbose_mode = 1; |
| 414 | break; |
| 415 | case 'q': |
| 416 | test_dequeue = 1; |
| 417 | break; |
| 418 | case 's': |
| 419 | test_splice = 1; |
| 420 | break; |
| 421 | case 'M': |
| 422 | test_sync = TEST_SYNC_MUTEX; |
| 423 | break; |
| 424 | case 'w': |
| 425 | test_wait_empty = 1; |
| 426 | break; |
| 427 | case 'f': |
| 428 | test_force_sync = 1; |
| 429 | break; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | /* activate splice test by default */ |
| 434 | if (!test_dequeue && !test_splice) |
| 435 | test_splice = 1; |
| 436 | |
| 437 | if (test_sync == TEST_SYNC_NONE && nr_dequeuers > 1 && test_dequeue) { |
| 438 | if (test_force_sync) { |
| 439 | fprintf(stderr, "[WARNING] Using dequeue concurrently " |
| 440 | "with other dequeue or splice without external " |
| 441 | "synchronization. Expect run-time failure.\n"); |
| 442 | } else { |
| 443 | printf("Enforcing mutex synchronization\n"); |
| 444 | test_sync = TEST_SYNC_MUTEX; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | printf_verbose("running test for %lu seconds, %u enqueuers, " |
| 449 | "%u dequeuers.\n", |
| 450 | duration, nr_enqueuers, nr_dequeuers); |
| 451 | if (test_dequeue) |
| 452 | printf_verbose("dequeue test activated.\n"); |
| 453 | else |
| 454 | printf_verbose("splice test activated.\n"); |
| 455 | if (test_sync == TEST_SYNC_MUTEX) |
| 456 | printf_verbose("External sync: mutex.\n"); |
| 457 | else |
| 458 | printf_verbose("External sync: none.\n"); |
| 459 | if (test_wait_empty) |
| 460 | printf_verbose("Wait for dequeuers to empty queue.\n"); |
| 461 | printf_verbose("Writer delay : %lu loops.\n", rduration); |
| 462 | printf_verbose("Reader duration : %lu loops.\n", wdelay); |
| 463 | printf_verbose("thread %-6s, tid %lu\n", |
| 464 | "main", urcu_get_thread_id()); |
| 465 | |
| 466 | tid_enqueuer = calloc(nr_enqueuers, sizeof(*tid_enqueuer)); |
| 467 | tid_dequeuer = calloc(nr_dequeuers, sizeof(*tid_dequeuer)); |
| 468 | count_enqueuer = calloc(nr_enqueuers, 3 * sizeof(*count_enqueuer)); |
| 469 | count_dequeuer = calloc(nr_dequeuers, 4 * sizeof(*count_dequeuer)); |
| 470 | cds_wfcq_init(&head, &tail); |
| 471 | |
| 472 | next_aff = 0; |
| 473 | |
| 474 | for (i = 0; i < nr_enqueuers; i++) { |
| 475 | err = pthread_create(&tid_enqueuer[i], NULL, thr_enqueuer, |
| 476 | &count_enqueuer[3 * i]); |
| 477 | if (err != 0) |
| 478 | exit(1); |
| 479 | } |
| 480 | for (i = 0; i < nr_dequeuers; i++) { |
| 481 | err = pthread_create(&tid_dequeuer[i], NULL, thr_dequeuer, |
| 482 | &count_dequeuer[4 * i]); |
| 483 | if (err != 0) |
| 484 | exit(1); |
| 485 | } |
| 486 | |
| 487 | cmm_smp_mb(); |
| 488 | |
| 489 | test_go = 1; |
| 490 | |
| 491 | for (i = 0; i < duration; i++) { |
| 492 | sleep(1); |
| 493 | if (verbose_mode) { |
| 494 | fwrite(".", sizeof(char), 1, stdout); |
| 495 | fflush(stdout); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | test_stop_enqueue = 1; |
| 500 | |
| 501 | if (test_wait_empty) { |
| 502 | while (nr_enqueuers != uatomic_read(&test_enqueue_stopped)) { |
| 503 | sleep(1); |
| 504 | } |
| 505 | while (!cds_wfcq_empty(&head, &tail)) { |
| 506 | sleep(1); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | test_stop_dequeue = 1; |
| 511 | |
| 512 | for (i = 0; i < nr_enqueuers; i++) { |
| 513 | err = pthread_join(tid_enqueuer[i], &tret); |
| 514 | if (err != 0) |
| 515 | exit(1); |
| 516 | tot_enqueues += count_enqueuer[3 * i]; |
| 517 | tot_successful_enqueues += count_enqueuer[3 * i + 1]; |
| 518 | tot_empty_dest_enqueues += count_enqueuer[3 * i + 2]; |
| 519 | } |
| 520 | for (i = 0; i < nr_dequeuers; i++) { |
| 521 | err = pthread_join(tid_dequeuer[i], &tret); |
| 522 | if (err != 0) |
| 523 | exit(1); |
| 524 | tot_dequeues += count_dequeuer[4 * i]; |
| 525 | tot_successful_dequeues += count_dequeuer[4 * i + 1]; |
| 526 | tot_splice += count_dequeuer[4 * i + 2]; |
| 527 | tot_dequeue_last += count_dequeuer[4 * i + 3]; |
| 528 | } |
| 529 | |
| 530 | test_end(&end_dequeues, &tot_dequeue_last); |
| 531 | |
| 532 | printf_verbose("total number of enqueues : %llu, dequeues %llu\n", |
| 533 | tot_enqueues, tot_dequeues); |
| 534 | printf_verbose("total number of successful enqueues : %llu, " |
| 535 | "enqueues to empty dest : %llu, " |
| 536 | "successful dequeues %llu, " |
| 537 | "splice : %llu, dequeue_last : %llu\n", |
| 538 | tot_successful_enqueues, |
| 539 | tot_empty_dest_enqueues, |
| 540 | tot_successful_dequeues, |
| 541 | tot_splice, tot_dequeue_last); |
| 542 | printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu " |
| 543 | "nr_dequeuers %3u " |
| 544 | "rdur %6lu nr_enqueues %12llu nr_dequeues %12llu " |
| 545 | "successful enqueues %12llu enqueues to empty dest %12llu " |
| 546 | "successful dequeues %12llu splice %12llu " |
| 547 | "dequeue_last %llu " |
| 548 | "end_dequeues %llu nr_ops %12llu\n", |
| 549 | argv[0], duration, nr_enqueuers, wdelay, |
| 550 | nr_dequeuers, rduration, tot_enqueues, tot_dequeues, |
| 551 | tot_successful_enqueues, |
| 552 | tot_empty_dest_enqueues, |
| 553 | tot_successful_dequeues, tot_splice, tot_dequeue_last, |
| 554 | end_dequeues, |
| 555 | tot_enqueues + tot_dequeues); |
| 556 | |
| 557 | if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues) { |
| 558 | printf("WARNING! Discrepancy between nr succ. enqueues %llu vs " |
| 559 | "succ. dequeues + end dequeues %llu.\n", |
| 560 | tot_successful_enqueues, |
| 561 | tot_successful_dequeues + end_dequeues); |
| 562 | retval = 1; |
| 563 | } |
| 564 | |
| 565 | /* |
| 566 | * If only using splice to dequeue, the enqueuer should see |
| 567 | * exactly as many empty queues than the number of non-empty |
| 568 | * src splice. |
| 569 | */ |
| 570 | if (tot_empty_dest_enqueues != tot_dequeue_last) { |
| 571 | printf("WARNING! Discrepancy between empty enqueue (%llu) and " |
| 572 | "number of dequeue of last element (%llu)\n", |
| 573 | tot_empty_dest_enqueues, |
| 574 | tot_dequeue_last); |
| 575 | retval = 1; |
| 576 | } |
| 577 | cds_wfcq_destroy(&head, &tail); |
| 578 | free(count_enqueuer); |
| 579 | free(count_dequeuer); |
| 580 | free(tid_enqueuer); |
| 581 | free(tid_dequeuer); |
| 582 | return retval; |
| 583 | } |