tests/test_urcu_hash_unique.c

   1 /*
   2  * test_urcu_hash_unique.c
   3  *
   4  * Userspace RCU library - test program
   5  *
   6  * Copyright 2009-2012 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #define _GNU_SOURCE
  24 #include "test_urcu_hash.h"
  25
  26 enum urcu_hash_addremove {
  27         AR_RANDOM = 0,
  28         AR_ADD = 1,
  29         AR_REMOVE = -1,
  30 };      /* 1: add, -1 remove, 0: random */
  31
  32 static enum urcu_hash_addremove addremove; /* 1: add, -1 remove, 0: random */
  33
  34 void test_hash_unique_sigusr1_handler(int signo)
  35 {
  36         switch (addremove) {
  37         case AR_ADD:
  38                 printf("Add/Remove: random.\n");
  39                 addremove = AR_RANDOM;
  40                 break;
  41         case AR_RANDOM:
  42                 printf("Add/Remove: remove only.\n");
  43                 addremove = AR_REMOVE;
  44                 break;
  45         case AR_REMOVE:
  46                 printf("Add/Remove: add only.\n");
  47                 addremove = AR_ADD;
  48                 break;
  49         }
  50 }
  51
  52 void test_hash_unique_sigusr2_handler(int signo)
  53 {
  54         char msg[1] = { 0x42 };
  55         ssize_t ret;
  56
  57         do {
  58                 ret = write(count_pipe[1], msg, 1);     /* wakeup thread */
  59         } while (ret == -1L && errno == EINTR);
  60 }
  61
  62 void *test_hash_unique_thr_reader(void *_count)
  63 {
  64         unsigned long long *count = _count;
  65
  66         printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
  67                         "reader", (unsigned long) pthread_self(),
  68                         (unsigned long) gettid());
  69
  70         set_affinity();
  71
  72         rcu_register_thread();
  73
  74         while (!test_go)
  75         {
  76         }
  77         cmm_smp_mb();
  78
  79         for (;;) {
  80                 struct lfht_test_node *node;
  81                 struct cds_lfht_iter iter;
  82                 /*
  83                  * iterate on whole table, ensuring that no duplicate is
  84                  * found.
  85                  */
  86                 rcu_read_lock();
  87                 cds_lfht_for_each_entry(test_ht, &iter, node, node) {
  88                         struct cds_lfht_iter dup_iter;
  89
  90                         dup_iter = iter;
  91                         cds_lfht_next_duplicate(test_ht, test_match,
  92                                 node->key, &dup_iter);
  93                         if (dup_iter.node != NULL) {
  94                                 printf("[ERROR] Duplicate key %p found\n", node->key);
  95                         }
  96                 }
  97                 rcu_read_unlock();
  98
  99                 rcu_debug_yield_read();
 100                 if (caa_unlikely(rduration))
 101                         loop_sleep(rduration);
 102                 URCU_TLS(nr_reads)++;
 103                 if (caa_unlikely(!test_duration_read()))
 104                         break;
 105                 if (caa_unlikely((URCU_TLS(nr_reads) & ((1 << 10) - 1)) == 0))
 106                         rcu_quiescent_state();
 107         }
 108
 109         rcu_unregister_thread();
 110
 111         *count = URCU_TLS(nr_reads);
 112         printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
 113                         "reader", (unsigned long) pthread_self(),
 114                         (unsigned long) gettid());
 115         printf_verbose("readid : %lx, lookupfail %lu, lookupok %lu\n",
 116                         (unsigned long) pthread_self(), URCU_TLS(lookup_fail),
 117                         URCU_TLS(lookup_ok));
 118         return ((void*)1);
 119
 120 }
 121
 122 void *test_hash_unique_thr_writer(void *_count)
 123 {
 124         struct lfht_test_node *node;
 125         struct cds_lfht_node *ret_node;
 126         struct cds_lfht_iter iter;
 127         struct wr_count *count = _count;
 128         int ret;
 129         int loc_add_unique;
 130
 131         printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
 132                         "writer", (unsigned long) pthread_self(),
 133                         (unsigned long) gettid());
 134
 135         set_affinity();
 136
 137         rcu_register_thread();
 138
 139         while (!test_go)
 140         {
 141         }
 142         cmm_smp_mb();
 143
 144         for (;;) {
 145                 /*
 146                  * add unique/add replace with new node key from range.
 147                  */
 148                 if (1 || (addremove == AR_ADD || add_only)
 149                                 || (addremove == AR_RANDOM && rand_r(&URCU_TLS(rand_lookup)) & 1)) {
 150                         node = malloc(sizeof(struct lfht_test_node));
 151                         lfht_test_node_init(node,
 152                                 (void *)(((unsigned long) rand_r(&URCU_TLS(rand_lookup)) % write_pool_size) + write_pool_offset),
 153                                 sizeof(void *));
 154                         rcu_read_lock();
 155                         loc_add_unique = rand_r(&URCU_TLS(rand_lookup)) & 1;
 156                         if (loc_add_unique) {
 157                                 ret_node = cds_lfht_add_unique(test_ht,
 158                                         test_hash(node->key, node->key_len, TEST_HASH_SEED),
 159                                         test_match, node->key, &node->node);
 160                         } else {
 161                                 ret_node = cds_lfht_add_replace(test_ht,
 162                                                 test_hash(node->key, node->key_len, TEST_HASH_SEED),
 163                                                 test_match, node->key, &node->node);
 164 #if 0 //generate an error on purpose
 165                                 cds_lfht_add(test_ht,
 166                                                 test_hash(node->key, node->key_len, TEST_HASH_SEED),
 167                                                 &node->node);
 168                                 ret_node = NULL;
 169 #endif //0
 170                         }
 171                         rcu_read_unlock();
 172                         if (loc_add_unique) {
 173                                 if (ret_node != &node->node) {
 174                                         free(node);
 175                                         URCU_TLS(nr_addexist)++;
 176                                 } else {
 177                                         URCU_TLS(nr_add)++;
 178                                 }
 179                         } else {
 180                                 if (ret_node) {
 181                                         call_rcu(&to_test_node(ret_node)->head,
 182                                                         free_node_cb);
 183                                         URCU_TLS(nr_addexist)++;
 184                                 } else {
 185                                         URCU_TLS(nr_add)++;
 186                                 }
 187                         }
 188                 } else {
 189                         /* May delete */
 190                         rcu_read_lock();
 191                         cds_lfht_test_lookup(test_ht,
 192                                 (void *)(((unsigned long) rand_r(&URCU_TLS(rand_lookup)) % write_pool_size) + write_pool_offset),
 193                                 sizeof(void *), &iter);
 194                         ret = cds_lfht_del(test_ht, cds_lfht_iter_get_node(&iter));
 195                         rcu_read_unlock();
 196                         if (ret == 0) {
 197                                 node = cds_lfht_iter_get_test_node(&iter);
 198                                 call_rcu(&node->head, free_node_cb);
 199                                 URCU_TLS(nr_del)++;
 200                         } else
 201                                 URCU_TLS(nr_delnoent)++;
 202                 }
 203 #if 0
 204                 //if (URCU_TLS(nr_writes) % 100000 == 0) {
 205                 if (URCU_TLS(nr_writes) % 1000 == 0) {
 206                         rcu_read_lock();
 207                         if (rand_r(&URCU_TLS(rand_lookup)) & 1) {
 208                                 ht_resize(test_ht, 1);
 209                         } else {
 210                                 ht_resize(test_ht, -1);
 211                         }
 212                         rcu_read_unlock();
 213                 }
 214 #endif //0
 215                 URCU_TLS(nr_writes)++;
 216                 if (caa_unlikely(!test_duration_write()))
 217                         break;
 218                 if (caa_unlikely(wdelay))
 219                         loop_sleep(wdelay);
 220                 if (caa_unlikely((URCU_TLS(nr_writes) & ((1 << 10) - 1)) == 0))
 221                         rcu_quiescent_state();
 222         }
 223
 224         rcu_unregister_thread();
 225
 226         printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
 227                         "writer", (unsigned long) pthread_self(),
 228                         (unsigned long) gettid());
 229         printf_verbose("info id %lx: nr_add %lu, nr_addexist %lu, nr_del %lu, "
 230                         "nr_delnoent %lu\n", (unsigned long) pthread_self(), URCU_TLS(nr_add),
 231                         URCU_TLS(nr_addexist), URCU_TLS(nr_del),
 232                         URCU_TLS(nr_delnoent));
 233         count->update_ops = URCU_TLS(nr_writes);
 234         count->add = URCU_TLS(nr_add);
 235         count->add_exist = URCU_TLS(nr_addexist);
 236         count->remove = URCU_TLS(nr_del);
 237         return ((void*)2);
 238 }
 239
 240 int test_hash_unique_populate_hash(void)
 241 {
 242         struct lfht_test_node *node;
 243         struct cds_lfht_node *ret_node;
 244
 245         printf("Starting uniqueness test.\n");
 246
 247         if (!init_populate)
 248                 return 0;
 249
 250         if (init_populate * 10 > init_pool_size) {
 251                 printf("WARNING: required to populate %lu nodes (-k), but random "
 252 "pool is quite small (%lu values) and we are in add_unique (-u) or add_replace (-s) mode. Try with a "
 253 "larger random pool (-p option). This may take a while...\n", init_populate, init_pool_size);
 254         }
 255
 256         while (URCU_TLS(nr_add) < init_populate) {
 257                 node = malloc(sizeof(struct lfht_test_node));
 258                 lfht_test_node_init(node,
 259                         (void *)(((unsigned long) rand_r(&URCU_TLS(rand_lookup)) % init_pool_size) + init_pool_offset),
 260                         sizeof(void *));
 261                 rcu_read_lock();
 262                 ret_node = cds_lfht_add_replace(test_ht,
 263                                 test_hash(node->key, node->key_len, TEST_HASH_SEED),
 264                                 test_match, node->key, &node->node);
 265                 rcu_read_unlock();
 266                 if (ret_node) {
 267                         call_rcu(&to_test_node(ret_node)->head, free_node_cb);
 268                         URCU_TLS(nr_addexist)++;
 269                 } else {
 270                         URCU_TLS(nr_add)++;
 271                 }
 272                 URCU_TLS(nr_writes)++;
 273         }
 274         return 0;
 275 }