tests/benchmark/test_urcu_hash.c

   1 // SPDX-FileCopyrightText: 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   2 //
   3 // SPDX-License-Identifier: GPL-2.0-or-later
   4
   5 /*
   6  * Userspace RCU library - test program
   7  */
   8
   9 #include "test_urcu_hash.h"
  10
  11 enum test_hash {
  12         TEST_HASH_RW,
  13         TEST_HASH_UNIQUE,
  14 };
  15
  16 struct test_hash_cb {
  17         void (*sigusr1)(int signo);
  18         void (*sigusr2)(int signo);
  19         void *(*thr_reader)(void *_count);
  20         void *(*thr_writer)(void *_count);
  21         int (*populate_hash)(void);
  22 };
  23
  24 static
  25 struct test_hash_cb test_hash_cb[] = {
  26         [TEST_HASH_RW] = {
  27                 test_hash_rw_sigusr1_handler,
  28                 test_hash_rw_sigusr2_handler,
  29                 test_hash_rw_thr_reader,
  30                 test_hash_rw_thr_writer,
  31                 test_hash_rw_populate_hash,
  32         },
  33         [TEST_HASH_UNIQUE] = {
  34                 test_hash_unique_sigusr1_handler,
  35                 test_hash_unique_sigusr2_handler,
  36                 test_hash_unique_thr_reader,
  37                 test_hash_unique_thr_writer,
  38                 test_hash_unique_populate_hash,
  39         },
  40
  41 };
  42
  43 static enum test_hash test_choice = TEST_HASH_RW;
  44
  45 static
  46 void (*get_sigusr1_cb(void))(int)
  47 {
  48         return test_hash_cb[test_choice].sigusr1;
  49 }
  50
  51 static
  52 void (*get_sigusr2_cb(void))(int)
  53 {
  54         return test_hash_cb[test_choice].sigusr2;
  55 }
  56
  57 static
  58 void *(*get_thr_reader_cb(void))(void *)
  59 {
  60         return test_hash_cb[test_choice].thr_reader;
  61 }
  62
  63 static
  64 void *(*get_thr_writer_cb(void))(void *)
  65 {
  66         return test_hash_cb[test_choice].thr_writer;
  67 }
  68
  69 static
  70 int (*get_populate_hash_cb(void))(void)
  71 {
  72         return test_hash_cb[test_choice].populate_hash;
  73 }
  74
  75 DEFINE_URCU_TLS(unsigned int, rand_lookup);
  76 DEFINE_URCU_TLS(unsigned long, nr_add);
  77 DEFINE_URCU_TLS(unsigned long, nr_addexist);
  78 DEFINE_URCU_TLS(unsigned long, nr_del);
  79 DEFINE_URCU_TLS(unsigned long, nr_delnoent);
  80 DEFINE_URCU_TLS(unsigned long, lookup_fail);
  81 DEFINE_URCU_TLS(unsigned long, lookup_ok);
  82
  83 struct cds_lfht *test_ht;
  84
  85 unsigned long wdelay;
  86
  87 unsigned long duration;
  88
  89 /* read-side C.S. duration, in loops */
  90 unsigned long rduration;
  91
  92 unsigned long init_hash_size = DEFAULT_HASH_SIZE;
  93 unsigned long min_hash_alloc_size = DEFAULT_MIN_ALLOC_SIZE;
  94 unsigned long max_hash_buckets_size = (1UL << 20);
  95 unsigned long init_populate;
  96 int opt_auto_resize;
  97 int add_only, add_unique, add_replace;
  98 const struct cds_lfht_mm_type *memory_backend;
  99
 100 unsigned long init_pool_offset, lookup_pool_offset, write_pool_offset;
 101 unsigned long init_pool_size = DEFAULT_RAND_POOL,
 102         lookup_pool_size = DEFAULT_RAND_POOL,
 103         write_pool_size = DEFAULT_RAND_POOL;
 104 int validate_lookup;
 105 unsigned long nr_hash_chains;   /* 0: normal table, other: number of hash chains */
 106
 107 int count_pipe[2];
 108
 109 int verbose_mode;
 110
 111 unsigned int cpu_affinities[NR_CPUS];
 112 unsigned int next_aff = 0;
 113 int use_affinity = 0;
 114
 115 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
 116
 117 DEFINE_URCU_TLS(unsigned long long, nr_writes);
 118 DEFINE_URCU_TLS(unsigned long long, nr_reads);
 119
 120 unsigned int nr_readers;
 121 unsigned int nr_writers;
 122
 123 static pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
 124
 125 void set_affinity(void)
 126 {
 127 #ifdef HAVE_SCHED_SETAFFINITY
 128         cpu_set_t mask;
 129         int cpu, ret;
 130 #endif /* HAVE_SCHED_SETAFFINITY */
 131
 132         if (!use_affinity)
 133                 return;
 134
 135 #ifdef HAVE_SCHED_SETAFFINITY
 136         ret = pthread_mutex_lock(&affinity_mutex);
 137         if (ret) {
 138                 perror("Error in pthread mutex lock");
 139                 exit(-1);
 140         }
 141         cpu = cpu_affinities[next_aff++];
 142         ret = pthread_mutex_unlock(&affinity_mutex);
 143         if (ret) {
 144                 perror("Error in pthread mutex unlock");
 145                 exit(-1);
 146         }
 147         CPU_ZERO(&mask);
 148         CPU_SET(cpu, &mask);
 149         sched_setaffinity(0, sizeof(mask), &mask);
 150 #endif /* HAVE_SCHED_SETAFFINITY */
 151 }
 152
 153 void rcu_copy_mutex_lock(void)
 154 {
 155         int ret;
 156         ret = pthread_mutex_lock(&rcu_copy_mutex);
 157         if (ret) {
 158                 perror("Error in pthread mutex lock");
 159                 exit(-1);
 160         }
 161 }
 162
 163 void rcu_copy_mutex_unlock(void)
 164 {
 165         int ret;
 166
 167         ret = pthread_mutex_unlock(&rcu_copy_mutex);
 168         if (ret) {
 169                 perror("Error in pthread mutex unlock");
 170                 exit(-1);
 171         }
 172 }
 173
 174 unsigned long test_compare(const void *key1, size_t key1_len,
 175                            const void *key2, size_t key2_len)
 176 {
 177         if (caa_unlikely(key1_len != key2_len))
 178                 return -1;
 179         urcu_posix_assert(key1_len == sizeof(unsigned long));
 180         if (key1 == key2)
 181                 return 0;
 182         else
 183                 return 1;
 184 }
 185
 186 static
 187 void *thr_count(void *arg __attribute__((unused)))
 188 {
 189         printf_verbose("thread_begin %s, tid %lu\n",
 190                         "counter", urcu_get_thread_id());
 191
 192         rcu_register_thread();
 193
 194         for (;;) {
 195                 unsigned long count;
 196                 long approx_before, approx_after;
 197                 ssize_t len;
 198                 char buf[1];
 199
 200                 rcu_thread_offline();
 201                 len = read(count_pipe[0], buf, 1);
 202                 rcu_thread_online();
 203                 if (caa_unlikely(!test_duration_read()))
 204                         break;
 205                 if (len != 1)
 206                         continue;
 207                 /* Accounting */
 208                 printf("Counting nodes... ");
 209                 fflush(stdout);
 210                 rcu_read_lock();
 211                 cds_lfht_count_nodes(test_ht, &approx_before, &count,
 212                                 &approx_after);
 213                 rcu_read_unlock();
 214                 printf("done.\n");
 215                 printf("Approximation before node accounting: %ld nodes.\n",
 216                         approx_before);
 217                 printf("Accounting of nodes in the hash table: "
 218                         "%lu nodes.\n",
 219                         count);
 220                 printf("Approximation after node accounting: %ld nodes.\n",
 221                         approx_after);
 222         }
 223         rcu_unregister_thread();
 224         return NULL;
 225 }
 226
 227 void free_node_cb(struct rcu_head *head)
 228 {
 229         struct lfht_test_node *node =
 230                 caa_container_of(head, struct lfht_test_node, head);
 231         free(node);
 232 }
 233
 234 static
 235 void test_delete_all_nodes(struct cds_lfht *ht)
 236 {
 237         struct cds_lfht_iter iter;
 238         struct lfht_test_node *node;
 239         unsigned long count = 0;
 240
 241         cds_lfht_for_each_entry(ht, &iter, node, node) {
 242                 int ret;
 243
 244                 ret = cds_lfht_del(test_ht, cds_lfht_iter_get_node(&iter));
 245                 urcu_posix_assert(!ret);
 246                 call_rcu(&node->head, free_node_cb);
 247                 count++;
 248         }
 249         printf("deleted %lu nodes.\n", count);
 250 }
 251
 252 static
 253 void show_usage(char **argv)
 254 {
 255         printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
 256                 argv[0]);
 257         printf("OPTIONS:\n");
 258         printf("        [-r] [-w] (yield reader and/or writer)\n");
 259         printf("        [-d delay] (writer period (us))\n");
 260         printf("        [-c duration] (reader C.S. duration (in loops))\n");
 261         printf("        [-v] (verbose output)\n");
 262         printf("        [-a cpu#] [-a cpu#]... (affinity)\n");
 263         printf("        [-h size] (initial number of buckets)\n");
 264         printf("        [-m size] (minimum number of allocated buckets)\n");
 265         printf("        [-n size] (maximum number of buckets)\n");
 266 printf("        [not -u nor -s] Add entries (supports redundant keys).\n");
 267         printf("        [-u] Uniquify add (no redundant keys).\n");
 268         printf("        [-s] Replace (swap) entries.\n");
 269         printf("        [-i] Add only (no removal).\n");
 270         printf("        [-k nr_nodes] Number of nodes to insert initially.\n");
 271         printf("        [-A] Automatically resize hash table.\n");
 272         printf("        [-B order|chunk|mmap] Specify the memory backend.\n");
 273         printf("        [-R offset] Lookup pool offset.\n");
 274         printf("        [-S offset] Write pool offset.\n");
 275         printf("        [-T offset] Init pool offset.\n");
 276         printf("        [-M size] Lookup pool size.\n");
 277         printf("        [-N size] Write pool size.\n");
 278         printf("        [-O size] Init pool size.\n");
 279         printf("        [-V] Validate lookups of init values.\n");
 280         printf("                (use with filled init pool, same lookup range,\n");
 281         printf("                with different write range)\n");
 282         printf("        [-U] Uniqueness test.\n");
 283         printf("        [-C] Number of hash chains.\n");
 284         printf("\n");
 285 }
 286
 287 int main(int argc, char **argv)
 288 {
 289         pthread_t *tid_reader, *tid_writer;
 290         pthread_t tid_count;
 291         void *tret;
 292         unsigned long long *count_reader;
 293         struct wr_count *count_writer;
 294         unsigned long long tot_reads = 0, tot_writes = 0,
 295                 tot_add = 0, tot_add_exist = 0, tot_remove = 0;
 296         unsigned long count;
 297         long approx_before, approx_after;
 298         int i, a, ret, err, mainret = 0;
 299         unsigned int i_thr;
 300         struct sigaction act;
 301         unsigned int remain;
 302         unsigned int nr_readers_created = 0, nr_writers_created = 0;
 303         long long nr_leaked;
 304
 305         if (argc < 4) {
 306                 show_usage(argv);
 307                 mainret = 1;
 308                 goto end;
 309         }
 310
 311         err = sscanf(argv[1], "%u", &nr_readers);
 312         if (err != 1) {
 313                 show_usage(argv);
 314                 mainret = 1;
 315                 goto end;
 316         }
 317
 318         err = sscanf(argv[2], "%u", &nr_writers);
 319         if (err != 1) {
 320                 show_usage(argv);
 321                 mainret = 1;
 322                 goto end;
 323         }
 324
 325         err = sscanf(argv[3], "%lu", &duration);
 326         if (err != 1) {
 327                 show_usage(argv);
 328                 mainret = 1;
 329                 goto end;
 330         }
 331
 332         for (i = 4; i < argc; i++) {
 333                 if (argv[i][0] != '-')
 334                         continue;
 335                 switch (argv[i][1]) {
 336                 case 'r':
 337                         rcu_debug_yield_enable(RCU_YIELD_READ);
 338                         break;
 339                 case 'w':
 340                         rcu_debug_yield_enable(RCU_YIELD_WRITE);
 341                         break;
 342                 case 'a':
 343                         if (argc < i + 2) {
 344                                 show_usage(argv);
 345                                 mainret = 1;
 346                                 goto end;
 347                         }
 348                         a = atoi(argv[++i]);
 349                         cpu_affinities[next_aff++] = a;
 350                         use_affinity = 1;
 351                         printf_verbose("Adding CPU %d affinity\n", a);
 352                         break;
 353                 case 'c':
 354                         if (argc < i + 2) {
 355                                 show_usage(argv);
 356                                 mainret = 1;
 357                                 goto end;
 358                         }
 359                         rduration = atol(argv[++i]);
 360                         break;
 361                 case 'd':
 362                         if (argc < i + 2) {
 363                                 show_usage(argv);
 364                                 mainret = 1;
 365                                 goto end;
 366                         }
 367                         wdelay = atol(argv[++i]);
 368                         break;
 369                 case 'v':
 370                         verbose_mode = 1;
 371                         break;
 372                 case 'h':
 373                         if (argc < i + 2) {
 374                                 show_usage(argv);
 375                                 mainret = 1;
 376                                 goto end;
 377                         }
 378                         init_hash_size = atol(argv[++i]);
 379                         break;
 380                 case 'm':
 381                         if (argc < i + 2) {
 382                                 show_usage(argv);
 383                                 mainret = 1;
 384                                 goto end;
 385                         }
 386                         min_hash_alloc_size = atol(argv[++i]);
 387                         break;
 388                 case 'n':
 389                         if (argc < i + 2) {
 390                                 show_usage(argv);
 391                                 mainret = 1;
 392                                 goto end;
 393                         }
 394                         max_hash_buckets_size = atol(argv[++i]);
 395                         break;
 396                 case 'u':
 397                         if (add_replace) {
 398                                 printf("Please specify at most one of -s or -u.\n");
 399                                 exit(-1);
 400                         }
 401                         add_unique = 1;
 402                         break;
 403                 case 's':
 404                         if (add_unique) {
 405                                 printf("Please specify at most one of -s or -u.\n");
 406                                 exit(-1);
 407                         }
 408                         add_replace = 1;
 409                         break;
 410                 case 'i':
 411                         add_only = 1;
 412                         break;
 413                 case 'k':
 414                         init_populate = atol(argv[++i]);
 415                         break;
 416                 case 'A':
 417                         opt_auto_resize = 1;
 418                         break;
 419                 case 'B':
 420                         if (argc < i + 2) {
 421                                 show_usage(argv);
 422                                 mainret = 1;
 423                                 goto end;
 424                         }
 425                         i++;
 426                         if (!strcmp("order", argv[i]))
 427                                 memory_backend = &cds_lfht_mm_order;
 428                         else if (!strcmp("chunk", argv[i]))
 429                                 memory_backend = &cds_lfht_mm_chunk;
 430                         else if (!strcmp("mmap", argv[i]))
 431                                 memory_backend = &cds_lfht_mm_mmap;
 432                         else {
 433                                 printf("Please specify memory backend with order|chunk|mmap.\n");
 434                                 mainret = 1;
 435                                 goto end;
 436                         }
 437                         break;
 438                 case 'R':
 439                         lookup_pool_offset = atol(argv[++i]);
 440                         break;
 441                 case 'S':
 442                         write_pool_offset = atol(argv[++i]);
 443                         break;
 444                 case 'T':
 445                         init_pool_offset = atol(argv[++i]);
 446                         break;
 447                 case 'M':
 448                         lookup_pool_size = atol(argv[++i]);
 449                         break;
 450                 case 'N':
 451                         write_pool_size = atol(argv[++i]);
 452                         break;
 453                 case 'O':
 454                         init_pool_size = atol(argv[++i]);
 455                         break;
 456                 case 'V':
 457                         validate_lookup = 1;
 458                         break;
 459                 case 'U':
 460                         test_choice = TEST_HASH_UNIQUE;
 461                         break;
 462                 case 'C':
 463                         nr_hash_chains = atol(argv[++i]);
 464                         break;
 465                 }
 466         }
 467
 468         /* Check if hash size is power of 2 */
 469         if (init_hash_size && init_hash_size & (init_hash_size - 1)) {
 470                 printf("Error: Initial number of buckets (%lu) is not a power of 2.\n",
 471                         init_hash_size);
 472                 mainret = 1;
 473                 goto end;
 474         }
 475
 476         if (min_hash_alloc_size && min_hash_alloc_size & (min_hash_alloc_size - 1)) {
 477                 printf("Error: Minimum number of allocated buckets (%lu) is not a power of 2.\n",
 478                         min_hash_alloc_size);
 479                 mainret = 1;
 480                 goto end;
 481         }
 482
 483         if (max_hash_buckets_size && max_hash_buckets_size & (max_hash_buckets_size - 1)) {
 484                 printf("Error: Maximum number of buckets (%lu) is not a power of 2.\n",
 485                         max_hash_buckets_size);
 486                 mainret = 1;
 487                 goto end;
 488         }
 489
 490         memset(&act, 0, sizeof(act));
 491         ret = sigemptyset(&act.sa_mask);
 492         if (ret == -1) {
 493                 perror("sigemptyset");
 494                 mainret = 1;
 495                 goto end;
 496         }
 497         act.sa_handler = get_sigusr1_cb();
 498         act.sa_flags = SA_RESTART;
 499         ret = sigaction(SIGUSR1, &act, NULL);
 500         if (ret == -1) {
 501                 perror("sigaction");
 502                 mainret = 1;
 503                 goto end;
 504         }
 505
 506         act.sa_handler = get_sigusr2_cb();
 507         act.sa_flags = SA_RESTART;
 508         ret = sigaction(SIGUSR2, &act, NULL);
 509         if (ret == -1) {
 510                 perror("sigaction");
 511                 mainret = 1;
 512                 goto end;
 513         }
 514
 515         printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
 516                 duration, nr_readers, nr_writers);
 517         printf_verbose("Writer delay : %lu loops.\n", wdelay);
 518         printf_verbose("Reader duration : %lu loops.\n", rduration);
 519         printf_verbose("Mode:%s%s.\n",
 520                 add_only ? " add only" : " add/remove",
 521                 add_unique ? " uniquify" : ( add_replace ? " replace" : " insert"));
 522         printf_verbose("Initial number of buckets: %lu buckets.\n", init_hash_size);
 523         printf_verbose("Minimum number of allocated buckets: %lu buckets.\n", min_hash_alloc_size);
 524         printf_verbose("Maximum number of buckets: %lu buckets.\n", max_hash_buckets_size);
 525         printf_verbose("Init pool size offset %lu size %lu.\n",
 526                 init_pool_offset, init_pool_size);
 527         printf_verbose("Lookup pool size offset %lu size %lu.\n",
 528                 lookup_pool_offset, lookup_pool_size);
 529         printf_verbose("Update pool size offset %lu size %lu.\n",
 530                 write_pool_offset, write_pool_size);
 531         printf_verbose("Number of hash chains: %lu.\n",
 532                 nr_hash_chains);
 533         printf_verbose("thread %-6s, tid %lu\n",
 534                         "main", urcu_get_thread_id());
 535
 536         tid_reader = calloc(nr_readers, sizeof(*tid_reader));
 537         if (!tid_reader) {
 538                 mainret = 1;
 539                 goto end;
 540         }
 541         tid_writer = calloc(nr_writers, sizeof(*tid_writer));
 542         if (!tid_writer) {
 543                 mainret = 1;
 544                 goto end_free_tid_reader;
 545         }
 546         count_reader = calloc(nr_readers, sizeof(*count_reader));
 547         if (!count_reader) {
 548                 mainret = 1;
 549                 goto end_free_tid_writer;
 550         }
 551         count_writer = calloc(nr_writers, sizeof(*count_writer));
 552         if (!count_writer) {
 553                 mainret = 1;
 554                 goto end_free_count_reader;
 555         }
 556
 557         err = create_all_cpu_call_rcu_data(0);
 558         if (err) {
 559                 printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
 560         }
 561
 562         if (memory_backend) {
 563                 test_ht = _cds_lfht_new(init_hash_size, min_hash_alloc_size,
 564                                 max_hash_buckets_size,
 565                                 (opt_auto_resize ? CDS_LFHT_AUTO_RESIZE : 0) |
 566                                 CDS_LFHT_ACCOUNTING, memory_backend,
 567                                 &rcu_flavor, NULL);
 568         } else {
 569                 test_ht = cds_lfht_new(init_hash_size, min_hash_alloc_size,
 570                                 max_hash_buckets_size,
 571                                 (opt_auto_resize ? CDS_LFHT_AUTO_RESIZE : 0) |
 572                                 CDS_LFHT_ACCOUNTING, NULL);
 573         }
 574         if (!test_ht) {
 575                 printf("Error allocating hash table.\n");
 576                 mainret = 1;
 577                 goto end_free_call_rcu_data;
 578         }
 579
 580         /*
 581          * Hash Population needs to be seen as a RCU reader
 582          * thread from the point of view of resize.
 583          */
 584         rcu_register_thread();
 585         ret = (get_populate_hash_cb())();
 586         urcu_posix_assert(!ret);
 587
 588         rcu_thread_offline();
 589
 590         next_aff = 0;
 591
 592         ret = pipe(count_pipe);
 593         if (ret == -1) {
 594                 perror("pipe");
 595                 mainret = 1;
 596                 goto end_online;
 597         }
 598
 599         /* spawn counter thread */
 600         err = pthread_create(&tid_count, NULL, thr_count,
 601                              NULL);
 602         if (err != 0) {
 603                 errno = err;
 604                 mainret = 1;
 605                 perror("pthread_create");
 606                 goto end_close_pipe;
 607         }
 608
 609         for (i_thr = 0; i_thr < nr_readers; i_thr++) {
 610                 err = pthread_create(&tid_reader[i_thr],
 611                                      NULL, get_thr_reader_cb(),
 612                                      &count_reader[i_thr]);
 613                 if (err != 0) {
 614                         errno = err;
 615                         mainret = 1;
 616                         perror("pthread_create");
 617                         goto end_pthread_join;
 618                 }
 619                 nr_readers_created++;
 620         }
 621         for (i_thr = 0; i_thr < nr_writers; i_thr++) {
 622                 err = pthread_create(&tid_writer[i_thr],
 623                                      NULL, get_thr_writer_cb(),
 624                                      &count_writer[i_thr]);
 625                 if (err != 0) {
 626                         errno = err;
 627                         mainret = 1;
 628                         perror("pthread_create");
 629                         goto end_pthread_join;
 630                 }
 631                 nr_writers_created++;
 632         }
 633
 634         cmm_smp_mb();
 635
 636         begin_test();
 637
 638         remain = duration;
 639         do {
 640                 remain = sleep(remain);
 641         } while (remain > 0);
 642
 643         end_test();
 644
 645 end_pthread_join:
 646         for (i_thr = 0; i_thr < nr_readers_created; i_thr++) {
 647                 err = pthread_join(tid_reader[i_thr], &tret);
 648                 if (err != 0) {
 649                         errno = err;
 650                         mainret = 1;
 651                         perror("pthread_join");
 652                 }
 653                 tot_reads += count_reader[i_thr];
 654         }
 655         for (i_thr = 0; i_thr < nr_writers_created; i_thr++) {
 656                 err = pthread_join(tid_writer[i_thr], &tret);
 657                 if (err != 0) {
 658                         errno = err;
 659                         mainret = 1;
 660                         perror("pthread_join");
 661                 }
 662                 tot_writes += count_writer[i_thr].update_ops;
 663                 tot_add += count_writer[i_thr].add;
 664                 tot_add_exist += count_writer[i_thr].add_exist;
 665                 tot_remove += count_writer[i_thr].remove;
 666         }
 667
 668         /* teardown counter thread */
 669         act.sa_handler = SIG_IGN;
 670         act.sa_flags = SA_RESTART;
 671         ret = sigaction(SIGUSR2, &act, NULL);
 672         if (ret == -1) {
 673                 mainret = 1;
 674                 perror("sigaction");
 675         }
 676         {
 677                 char msg[1] = { 0x42 };
 678                 ssize_t sret;
 679
 680                 do {
 681                         sret = write(count_pipe[1], msg, 1);    /* wakeup thread */
 682                 } while (sret == -1L && errno == EINTR);
 683         }
 684         err = pthread_join(tid_count, &tret);
 685         if (err != 0) {
 686                 errno = err;
 687                 mainret = 1;
 688                 perror("pthread_join");
 689         }
 690
 691 end_close_pipe:
 692         for (i = 0; i < 2; i++) {
 693                 err = close(count_pipe[i]);
 694                 if (err) {
 695                         mainret = 1;
 696                         perror("close pipe");
 697                 }
 698         }
 699         fflush(stdout);
 700 end_online:
 701         rcu_thread_online();
 702         rcu_read_lock();
 703         printf("Counting nodes... ");
 704         cds_lfht_count_nodes(test_ht, &approx_before, &count, &approx_after);
 705         printf("done.\n");
 706         test_delete_all_nodes(test_ht);
 707         rcu_read_unlock();
 708         rcu_thread_offline();
 709         if (count) {
 710                 printf("Approximation before node accounting: %ld nodes.\n",
 711                         approx_before);
 712                 printf("Nodes deleted from hash table before destroy: "
 713                         "%lu nodes.\n",
 714                         count);
 715                 printf("Approximation after node accounting: %ld nodes.\n",
 716                         approx_after);
 717         }
 718
 719         ret = cds_lfht_destroy(test_ht, NULL);
 720         if (ret) {
 721                 printf_verbose("final delete aborted\n");
 722                 mainret = 1;
 723         } else {
 724                 printf_verbose("final delete success\n");
 725         }
 726         printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
 727                tot_writes);
 728         nr_leaked = (long long) tot_add + init_populate - tot_remove - count;
 729         printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
 730                 "nr_writers %3u "
 731                 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
 732                 "nr_add %12llu nr_add_fail %12llu nr_remove %12llu nr_leaked %12lld\n",
 733                 argv[0], duration, nr_readers, rduration,
 734                 nr_writers, wdelay, tot_reads, tot_writes,
 735                 tot_reads + tot_writes, tot_add, tot_add_exist, tot_remove,
 736                 nr_leaked);
 737         if (nr_leaked != 0) {
 738                 mainret = 1;
 739                 printf("WARNING: %lld nodes were leaked!\n", nr_leaked);
 740         }
 741
 742         rcu_unregister_thread();
 743 end_free_call_rcu_data:
 744         free_all_cpu_call_rcu_data();
 745         free(count_writer);
 746 end_free_count_reader:
 747         free(count_reader);
 748 end_free_tid_writer:
 749         free(tid_writer);
 750 end_free_tid_reader:
 751         free(tid_reader);
 752 end:
 753         if (!mainret)
 754                 exit(EXIT_SUCCESS);
 755         else
 756                 exit(EXIT_FAILURE);
 757 }