Cleanup: enable signed/unsigned compare compiler warning
[urcu.git] / tests / benchmark / test_urcu_lfs.c
1 /*
2 * test_urcu_lfs.c
3 *
4 * Userspace RCU library - example lock-free stack
5 *
6 * Copyright 2010-2012 - 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 "cpuset.h"
40 #include "thread-id.h"
41
42 /* hardcoded number of CPUs */
43 #define NR_CPUS 16384
44
45 #ifndef DYNAMIC_LINK_TEST
46 #define _LGPL_SOURCE
47 #endif
48 #include <urcu.h>
49 #include <urcu/cds.h>
50
51 #define POISON_PTR ((void *) 0x42UL)
52
53 /*
54 * External synchronization used.
55 */
56 enum test_sync {
57 TEST_SYNC_NONE = 0,
58 TEST_SYNC_RCU,
59 };
60
61 static enum test_sync test_sync;
62
63 static volatile int test_go, test_stop;
64
65 static unsigned long rduration;
66
67 static unsigned long duration;
68
69 /* read-side C.S. duration, in loops */
70 static unsigned long wdelay;
71
72 static inline void loop_sleep(unsigned long loops)
73 {
74 while (loops-- != 0)
75 caa_cpu_relax();
76 }
77
78 static int verbose_mode;
79
80 static int test_pop, test_pop_all;
81
82 #define printf_verbose(fmt, args...) \
83 do { \
84 if (verbose_mode) \
85 printf(fmt, ## args); \
86 } while (0)
87
88 static unsigned int cpu_affinities[NR_CPUS];
89 static unsigned int next_aff = 0;
90 static int use_affinity = 0;
91
92 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
93
94 static void set_affinity(void)
95 {
96 #if HAVE_SCHED_SETAFFINITY
97 cpu_set_t mask;
98 int cpu, ret;
99 #endif /* HAVE_SCHED_SETAFFINITY */
100
101 if (!use_affinity)
102 return;
103
104 #if HAVE_SCHED_SETAFFINITY
105 ret = pthread_mutex_lock(&affinity_mutex);
106 if (ret) {
107 perror("Error in pthread mutex lock");
108 exit(-1);
109 }
110 cpu = cpu_affinities[next_aff++];
111 ret = pthread_mutex_unlock(&affinity_mutex);
112 if (ret) {
113 perror("Error in pthread mutex unlock");
114 exit(-1);
115 }
116
117 CPU_ZERO(&mask);
118 CPU_SET(cpu, &mask);
119 #if SCHED_SETAFFINITY_ARGS == 2
120 sched_setaffinity(0, &mask);
121 #else
122 sched_setaffinity(0, sizeof(mask), &mask);
123 #endif
124 #endif /* HAVE_SCHED_SETAFFINITY */
125 }
126
127 /*
128 * returns 0 if test should end.
129 */
130 static int test_duration_dequeue(void)
131 {
132 return !test_stop;
133 }
134
135 static int test_duration_enqueue(void)
136 {
137 return !test_stop;
138 }
139
140 static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
141 static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
142
143 static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
144 static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
145
146 static unsigned int nr_enqueuers;
147 static unsigned int nr_dequeuers;
148
149 struct test {
150 struct cds_lfs_node list;
151 struct rcu_head rcu;
152 };
153
154 static struct cds_lfs_stack s;
155
156 static void *thr_enqueuer(void *_count)
157 {
158 unsigned long long *count = _count;
159
160 printf_verbose("thread_begin %s, tid %lu\n",
161 "enqueuer", urcu_get_thread_id());
162
163 set_affinity();
164
165 rcu_register_thread();
166
167 while (!test_go)
168 {
169 }
170 cmm_smp_mb();
171
172 for (;;) {
173 struct test *node = malloc(sizeof(*node));
174 if (!node)
175 goto fail;
176 cds_lfs_node_init(&node->list);
177 cds_lfs_push(&s, &node->list);
178 URCU_TLS(nr_successful_enqueues)++;
179
180 if (caa_unlikely(wdelay))
181 loop_sleep(wdelay);
182 fail:
183 URCU_TLS(nr_enqueues)++;
184 if (caa_unlikely(!test_duration_enqueue()))
185 break;
186 }
187
188 rcu_unregister_thread();
189
190 count[0] = URCU_TLS(nr_enqueues);
191 count[1] = URCU_TLS(nr_successful_enqueues);
192 printf_verbose("enqueuer thread_end, tid %lu, "
193 "enqueues %llu successful_enqueues %llu\n",
194 urcu_get_thread_id(),
195 URCU_TLS(nr_enqueues),
196 URCU_TLS(nr_successful_enqueues));
197 return ((void*)1);
198
199 }
200
201 static
202 void free_node_cb(struct rcu_head *head)
203 {
204 struct test *node =
205 caa_container_of(head, struct test, rcu);
206 free(node);
207 }
208
209 static
210 void do_test_pop(enum test_sync sync)
211 {
212 struct cds_lfs_node *snode;
213
214 if (sync == TEST_SYNC_RCU)
215 rcu_read_lock();
216 snode = __cds_lfs_pop(&s);
217 if (sync == TEST_SYNC_RCU)
218 rcu_read_unlock();
219 if (snode) {
220 struct test *node;
221
222 snode->next = POISON_PTR;
223 node = caa_container_of(snode,
224 struct test, list);
225 if (sync == TEST_SYNC_RCU)
226 call_rcu(&node->rcu, free_node_cb);
227 else
228 free(node);
229 URCU_TLS(nr_successful_dequeues)++;
230 }
231 URCU_TLS(nr_dequeues)++;
232 }
233
234 static
235 void do_test_pop_all(enum test_sync sync)
236 {
237 struct cds_lfs_node *snode;
238 struct cds_lfs_head *head;
239 struct cds_lfs_node *n;
240
241 head = __cds_lfs_pop_all(&s);
242 cds_lfs_for_each_safe(head, snode, n) {
243 struct test *node;
244
245 snode->next = POISON_PTR;
246 node = caa_container_of(snode, struct test, list);
247 if (sync == TEST_SYNC_RCU)
248 call_rcu(&node->rcu, free_node_cb);
249 else
250 free(node);
251 URCU_TLS(nr_successful_dequeues)++;
252 URCU_TLS(nr_dequeues)++;
253 }
254
255 }
256
257 static void *thr_dequeuer(void *_count)
258 {
259 unsigned long long *count = _count;
260 unsigned int counter = 0;
261
262 printf_verbose("thread_begin %s, tid %lu\n",
263 "dequeuer", urcu_get_thread_id());
264
265 set_affinity();
266
267 rcu_register_thread();
268
269 while (!test_go)
270 {
271 }
272 cmm_smp_mb();
273
274 assert(test_pop || test_pop_all);
275
276 for (;;) {
277 if (test_pop && test_pop_all) {
278 /* both pop and pop all */
279 if (counter & 1)
280 do_test_pop(test_sync);
281 else
282 do_test_pop_all(test_sync);
283 counter++;
284 } else {
285 if (test_pop)
286 do_test_pop(test_sync);
287 else
288 do_test_pop_all(test_sync);
289 }
290
291 if (caa_unlikely(!test_duration_dequeue()))
292 break;
293 if (caa_unlikely(rduration))
294 loop_sleep(rduration);
295 }
296
297 rcu_unregister_thread();
298
299 printf_verbose("dequeuer thread_end, tid %lu, "
300 "dequeues %llu, successful_dequeues %llu\n",
301 urcu_get_thread_id(),
302 URCU_TLS(nr_dequeues),
303 URCU_TLS(nr_successful_dequeues));
304 count[0] = URCU_TLS(nr_dequeues);
305 count[1] = URCU_TLS(nr_successful_dequeues);
306 return ((void*)2);
307 }
308
309 static void test_end(struct cds_lfs_stack *s, unsigned long long *nr_dequeues)
310 {
311 struct cds_lfs_node *snode;
312
313 do {
314 snode = __cds_lfs_pop(s);
315 if (snode) {
316 struct test *node;
317
318 node = caa_container_of(snode, struct test, list);
319 free(node);
320 (*nr_dequeues)++;
321 }
322 } while (snode);
323 }
324
325 static void show_usage(int argc, char **argv)
326 {
327 printf("Usage : %s nr_dequeuers nr_enqueuers duration (s) <OPTIONS>\n",
328 argv[0]);
329 printf("OPTIONS:\n");
330 printf(" [-d delay] (enqueuer period (in loops))\n");
331 printf(" [-c duration] (dequeuer period (in loops))\n");
332 printf(" [-v] (verbose output)\n");
333 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
334 printf(" [-p] (test pop)\n");
335 printf(" [-P] (test pop_all, enabled by default)\n");
336 printf(" [-R] (use RCU external synchronization)\n");
337 printf(" Note: default: no external synchronization used.\n");
338 printf("\n");
339 }
340
341 int main(int argc, char **argv)
342 {
343 int err;
344 pthread_t *tid_enqueuer, *tid_dequeuer;
345 void *tret;
346 unsigned long long *count_enqueuer, *count_dequeuer;
347 unsigned long long tot_enqueues = 0, tot_dequeues = 0;
348 unsigned long long tot_successful_enqueues = 0,
349 tot_successful_dequeues = 0;
350 unsigned long long end_dequeues = 0;
351 int i, a;
352 unsigned int i_thr;
353
354 if (argc < 4) {
355 show_usage(argc, argv);
356 return -1;
357 }
358
359 err = sscanf(argv[1], "%u", &nr_dequeuers);
360 if (err != 1) {
361 show_usage(argc, argv);
362 return -1;
363 }
364
365 err = sscanf(argv[2], "%u", &nr_enqueuers);
366 if (err != 1) {
367 show_usage(argc, argv);
368 return -1;
369 }
370
371 err = sscanf(argv[3], "%lu", &duration);
372 if (err != 1) {
373 show_usage(argc, argv);
374 return -1;
375 }
376
377 for (i = 4; i < argc; i++) {
378 if (argv[i][0] != '-')
379 continue;
380 switch (argv[i][1]) {
381 case 'a':
382 if (argc < i + 2) {
383 show_usage(argc, argv);
384 return -1;
385 }
386 a = atoi(argv[++i]);
387 cpu_affinities[next_aff++] = a;
388 use_affinity = 1;
389 printf_verbose("Adding CPU %d affinity\n", a);
390 break;
391 case 'c':
392 if (argc < i + 2) {
393 show_usage(argc, argv);
394 return -1;
395 }
396 rduration = atol(argv[++i]);
397 break;
398 case 'd':
399 if (argc < i + 2) {
400 show_usage(argc, argv);
401 return -1;
402 }
403 wdelay = atol(argv[++i]);
404 break;
405 case 'v':
406 verbose_mode = 1;
407 break;
408 case 'p':
409 test_pop = 1;
410 break;
411 case 'P':
412 test_pop_all = 1;
413 break;
414 case 'R':
415 test_sync = TEST_SYNC_RCU;
416 break;
417 }
418 }
419
420 /* activate pop_all test by default */
421 if (!test_pop && !test_pop_all)
422 test_pop_all = 1;
423
424 printf_verbose("running test for %lu seconds, %u enqueuers, "
425 "%u dequeuers.\n",
426 duration, nr_enqueuers, nr_dequeuers);
427 if (test_pop)
428 printf_verbose("pop test activated.\n");
429 if (test_pop_all)
430 printf_verbose("pop_all test activated.\n");
431 if (test_sync == TEST_SYNC_RCU)
432 printf_verbose("External sync: RCU.\n");
433 else
434 printf_verbose("External sync: none.\n");
435 printf_verbose("Writer delay : %lu loops.\n", rduration);
436 printf_verbose("Reader duration : %lu loops.\n", wdelay);
437 printf_verbose("thread %-6s, tid %lu\n",
438 "main", urcu_get_thread_id());
439
440 tid_enqueuer = calloc(nr_enqueuers, sizeof(*tid_enqueuer));
441 tid_dequeuer = calloc(nr_dequeuers, sizeof(*tid_dequeuer));
442 count_enqueuer = calloc(nr_enqueuers, 2 * sizeof(*count_enqueuer));
443 count_dequeuer = calloc(nr_dequeuers, 2 * sizeof(*count_dequeuer));
444 cds_lfs_init(&s);
445 err = create_all_cpu_call_rcu_data(0);
446 if (err) {
447 printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
448 }
449
450 next_aff = 0;
451
452 for (i_thr = 0; i_thr < nr_enqueuers; i_thr++) {
453 err = pthread_create(&tid_enqueuer[i_thr], NULL, thr_enqueuer,
454 &count_enqueuer[2 * i_thr]);
455 if (err != 0)
456 exit(1);
457 }
458 for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
459 err = pthread_create(&tid_dequeuer[i_thr], NULL, thr_dequeuer,
460 &count_dequeuer[2 * i_thr]);
461 if (err != 0)
462 exit(1);
463 }
464
465 cmm_smp_mb();
466
467 test_go = 1;
468
469 for (i_thr = 0; i_thr < duration; i_thr++) {
470 sleep(1);
471 if (verbose_mode) {
472 fwrite(".", sizeof(char), 1, stdout);
473 fflush(stdout);
474 }
475 }
476
477 test_stop = 1;
478
479 for (i_thr = 0; i_thr < nr_enqueuers; i_thr++) {
480 err = pthread_join(tid_enqueuer[i_thr], &tret);
481 if (err != 0)
482 exit(1);
483 tot_enqueues += count_enqueuer[2 * i_thr];
484 tot_successful_enqueues += count_enqueuer[2 * i_thr + 1];
485 }
486 for (i_thr = 0; i_thr < nr_dequeuers; i_thr++) {
487 err = pthread_join(tid_dequeuer[i_thr], &tret);
488 if (err != 0)
489 exit(1);
490 tot_dequeues += count_dequeuer[2 * i_thr];
491 tot_successful_dequeues += count_dequeuer[2 * i_thr + 1];
492 }
493
494 test_end(&s, &end_dequeues);
495
496 printf_verbose("total number of enqueues : %llu, dequeues %llu\n",
497 tot_enqueues, tot_dequeues);
498 printf_verbose("total number of successful enqueues : %llu, "
499 "successful dequeues %llu\n",
500 tot_successful_enqueues, tot_successful_dequeues);
501 printf("SUMMARY %-25s testdur %4lu nr_enqueuers %3u wdelay %6lu "
502 "nr_dequeuers %3u "
503 "rdur %6lu nr_enqueues %12llu nr_dequeues %12llu "
504 "successful enqueues %12llu successful dequeues %12llu "
505 "end_dequeues %llu nr_ops %12llu\n",
506 argv[0], duration, nr_enqueuers, wdelay,
507 nr_dequeuers, rduration, tot_enqueues, tot_dequeues,
508 tot_successful_enqueues,
509 tot_successful_dequeues, end_dequeues,
510 tot_enqueues + tot_dequeues);
511 if (tot_successful_enqueues != tot_successful_dequeues + end_dequeues)
512 printf("WARNING! Discrepancy between nr succ. enqueues %llu vs "
513 "succ. dequeues + end dequeues %llu.\n",
514 tot_successful_enqueues,
515 tot_successful_dequeues + end_dequeues);
516
517 free_all_cpu_call_rcu_data();
518 cds_lfs_destroy(&s);
519 free(count_enqueuer);
520 free(count_dequeuer);
521 free(tid_enqueuer);
522 free(tid_dequeuer);
523
524 return 0;
525 }
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