Documentation: rculfhash: cds_lfht_resize not within read-side C.S.
[urcu.git] / tests / test_mutex.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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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
d8540fc5 24#include "../config.h"
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25#include <stdio.h>
26#include <pthread.h>
27#include <stdlib.h>
28#include <string.h>
29#include <sys/types.h>
30#include <sys/wait.h>
31#include <unistd.h>
32#include <stdio.h>
33#include <assert.h>
94b343fd 34#include <errno.h>
51299083 35
ec4e58a3 36#include <urcu/arch.h>
bd252a04 37#include <urcu/tls-compat.h>
2953b501 38#include "cpuset.h"
51299083 39
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40#ifdef __linux__
41#include <syscall.h>
42#endif
43
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44/* hardcoded number of CPUs */
45#define NR_CPUS 16384
46
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47#if defined(_syscall0)
48_syscall0(pid_t, gettid)
49#elif defined(__NR_gettid)
50static inline pid_t gettid(void)
51{
52 return syscall(__NR_gettid);
53}
54#else
55#warning "use pid as tid"
56static inline pid_t gettid(void)
57{
58 return getpid();
59}
60#endif
61
62#ifndef DYNAMIC_LINK_TEST
63#define _LGPL_SOURCE
64#else
65#define debug_yield_read()
66#endif
ec4e58a3 67#include <urcu.h>
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68
69struct test_array {
70 int a;
71};
72
73static pthread_mutex_t lock;
74
75static volatile int test_go, test_stop;
76
9e31d0f0 77static unsigned long wdelay;
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78
79static volatile struct test_array test_array = { 8 };
80
81static unsigned long duration;
82
daddf5b0 83/* read-side C.S. duration, in loops */
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84static unsigned long rduration;
85
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86/* write-side C.S. duration, in loops */
87static unsigned long wduration;
88
ab0aacbe 89static inline void loop_sleep(unsigned long loops)
daddf5b0 90{
ab0aacbe 91 while (loops-- != 0)
06f22bdb 92 caa_cpu_relax();
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93}
94
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95static int verbose_mode;
96
97#define printf_verbose(fmt, args...) \
98 do { \
99 if (verbose_mode) \
100 printf(fmt, args); \
101 } while (0)
102
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103static unsigned int cpu_affinities[NR_CPUS];
104static unsigned int next_aff = 0;
105static int use_affinity = 0;
106
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107pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
108
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109static void set_affinity(void)
110{
95bc7fb9 111#if HAVE_SCHED_SETAFFINITY
2a7ac59d 112 cpu_set_t mask;
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113 int cpu, ret;
114#endif /* HAVE_SCHED_SETAFFINITY */
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115
116 if (!use_affinity)
117 return;
118
d8540fc5 119#if HAVE_SCHED_SETAFFINITY
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120 ret = pthread_mutex_lock(&affinity_mutex);
121 if (ret) {
122 perror("Error in pthread mutex lock");
123 exit(-1);
124 }
2a7ac59d 125 cpu = cpu_affinities[next_aff++];
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126 ret = pthread_mutex_unlock(&affinity_mutex);
127 if (ret) {
128 perror("Error in pthread mutex unlock");
129 exit(-1);
130 }
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131 CPU_ZERO(&mask);
132 CPU_SET(cpu, &mask);
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133#if SCHED_SETAFFINITY_ARGS == 2
134 sched_setaffinity(0, &mask);
135#else
2a7ac59d 136 sched_setaffinity(0, sizeof(mask), &mask);
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137#endif
138#endif /* HAVE_SCHED_SETAFFINITY */
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139}
140
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141/*
142 * returns 0 if test should end.
143 */
144static int test_duration_write(void)
145{
146 return !test_stop;
147}
148
149static int test_duration_read(void)
150{
151 return !test_stop;
152}
153
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154static DEFINE_URCU_TLS(unsigned long long, nr_writes);
155static DEFINE_URCU_TLS(unsigned long long, nr_reads);
51299083 156
55271c13 157static
06f22bdb 158unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13 159static
06f22bdb 160unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
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161
162static unsigned int nr_readers;
163static unsigned int nr_writers;
164
165pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
166
167void rcu_copy_mutex_lock(void)
168{
169 int ret;
170 ret = pthread_mutex_lock(&rcu_copy_mutex);
171 if (ret) {
172 perror("Error in pthread mutex lock");
173 exit(-1);
174 }
175}
176
177void rcu_copy_mutex_unlock(void)
178{
179 int ret;
180
181 ret = pthread_mutex_unlock(&rcu_copy_mutex);
182 if (ret) {
183 perror("Error in pthread mutex unlock");
184 exit(-1);
185 }
186}
187
188void *thr_reader(void *data)
189{
190 unsigned long tidx = (unsigned long)data;
191
4bad7d45 192 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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193 "reader", (unsigned long) pthread_self(),
194 (unsigned long) gettid());
51299083 195
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196 set_affinity();
197
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198 while (!test_go)
199 {
200 }
201
202 for (;;) {
203 pthread_mutex_lock(&lock);
204 assert(test_array.a == 8);
a0b7f7ea 205 if (caa_unlikely(rduration))
daddf5b0 206 loop_sleep(rduration);
51299083 207 pthread_mutex_unlock(&lock);
bd252a04 208 URCU_TLS(nr_reads)++;
a0b7f7ea 209 if (caa_unlikely(!test_duration_read()))
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210 break;
211 }
212
bd252a04 213 tot_nr_reads[tidx] = URCU_TLS(nr_reads);
cda3c71d 214 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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215 "reader", (unsigned long) pthread_self(),
216 (unsigned long) gettid());
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217 return ((void*)1);
218
219}
220
221void *thr_writer(void *data)
222{
223 unsigned long wtidx = (unsigned long)data;
224
4bad7d45 225 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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226 "writer", (unsigned long) pthread_self(),
227 (unsigned long) gettid());
51299083 228
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229 set_affinity();
230
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231 while (!test_go)
232 {
233 }
5481ddb3 234 cmm_smp_mb();
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235
236 for (;;) {
237 pthread_mutex_lock(&lock);
238 test_array.a = 0;
239 test_array.a = 8;
a0b7f7ea 240 if (caa_unlikely(wduration))
31b598e0 241 loop_sleep(wduration);
51299083 242 pthread_mutex_unlock(&lock);
bd252a04 243 URCU_TLS(nr_writes)++;
a0b7f7ea 244 if (caa_unlikely(!test_duration_write()))
51299083 245 break;
a0b7f7ea 246 if (caa_unlikely(wdelay))
9e31d0f0 247 loop_sleep(wdelay);
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248 }
249
4bad7d45 250 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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251 "writer", (unsigned long) pthread_self(),
252 (unsigned long) gettid());
bd252a04 253 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
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254 return ((void*)2);
255}
256
257void show_usage(int argc, char **argv)
258{
259 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
260#ifdef DEBUG_YIELD
261 printf(" [-r] [-w] (yield reader and/or writer)");
262#endif
263 printf(" [-d delay] (writer period (us))");
daddf5b0 264 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 265 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 266 printf(" [-v] (verbose output)");
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267 printf(" [-a cpu#] [-a cpu#]... (affinity)");
268 printf("\n");
269}
270
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271int main(int argc, char **argv)
272{
273 int err;
274 pthread_t *tid_reader, *tid_writer;
275 void *tret;
276 unsigned long long *count_reader, *count_writer;
277 unsigned long long tot_reads = 0, tot_writes = 0;
278 int i, a;
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279
280 if (argc < 4) {
281 show_usage(argc, argv);
282 return -1;
283 }
5481ddb3 284 cmm_smp_mb();
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285
286 err = sscanf(argv[1], "%u", &nr_readers);
287 if (err != 1) {
288 show_usage(argc, argv);
289 return -1;
290 }
291
292 err = sscanf(argv[2], "%u", &nr_writers);
293 if (err != 1) {
294 show_usage(argc, argv);
295 return -1;
296 }
297
298 err = sscanf(argv[3], "%lu", &duration);
299 if (err != 1) {
300 show_usage(argc, argv);
301 return -1;
302 }
303
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304 for (i = 4; i < argc; i++) {
305 if (argv[i][0] != '-')
306 continue;
307 switch (argv[i][1]) {
308#ifdef DEBUG_YIELD
309 case 'r':
310 yield_active |= YIELD_READ;
311 break;
312 case 'w':
313 yield_active |= YIELD_WRITE;
314 break;
315#endif
316 case 'a':
317 if (argc < i + 2) {
318 show_usage(argc, argv);
319 return -1;
320 }
321 a = atoi(argv[++i]);
2a7ac59d 322 cpu_affinities[next_aff++] = a;
51299083 323 use_affinity = 1;
4bad7d45 324 printf_verbose("Adding CPU %d affinity\n", a);
51299083 325 break;
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326 case 'c':
327 if (argc < i + 2) {
328 show_usage(argc, argv);
329 return -1;
330 }
9e31d0f0 331 rduration = atol(argv[++i]);
8b632bab 332 break;
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333 case 'd':
334 if (argc < i + 2) {
335 show_usage(argc, argv);
336 return -1;
337 }
9e31d0f0 338 wdelay = atol(argv[++i]);
51299083 339 break;
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340 case 'e':
341 if (argc < i + 2) {
342 show_usage(argc, argv);
343 return -1;
344 }
345 wduration = atol(argv[++i]);
346 break;
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347 case 'v':
348 verbose_mode = 1;
349 break;
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350 }
351 }
352
4bad7d45 353 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
51299083 354 duration, nr_readers, nr_writers);
9e31d0f0 355 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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356 printf_verbose("Reader duration : %lu loops.\n", rduration);
357 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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358 "main", (unsigned long) pthread_self(),
359 (unsigned long) gettid());
51299083 360
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361 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
362 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
363 count_reader = malloc(sizeof(*count_reader) * nr_readers);
364 count_writer = malloc(sizeof(*count_writer) * nr_writers);
365 tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
366 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
367
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368 next_aff = 0;
369
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370 for (i = 0; i < nr_readers; i++) {
371 err = pthread_create(&tid_reader[i], NULL, thr_reader,
372 (void *)(long)i);
373 if (err != 0)
374 exit(1);
375 }
376 for (i = 0; i < nr_writers; i++) {
377 err = pthread_create(&tid_writer[i], NULL, thr_writer,
378 (void *)(long)i);
379 if (err != 0)
380 exit(1);
381 }
382
5481ddb3 383 cmm_smp_mb();
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384
385 test_go = 1;
386
387 sleep(duration);
388
389 test_stop = 1;
390
391 for (i = 0; i < nr_readers; i++) {
392 err = pthread_join(tid_reader[i], &tret);
393 if (err != 0)
394 exit(1);
395 tot_reads += tot_nr_reads[i];
396 }
397 for (i = 0; i < nr_writers; i++) {
398 err = pthread_join(tid_writer[i], &tret);
399 if (err != 0)
400 exit(1);
401 tot_writes += tot_nr_writes[i];
402 }
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403
404 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
51299083 405 tot_writes);
a50a7b43 406 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 407 "nr_writers %3u "
9e31d0f0 408 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 409 argv[0], duration, nr_readers, rduration, wduration,
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410 nr_writers, wdelay, tot_reads, tot_writes,
411 tot_reads + tot_writes);
412
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413 free(tid_reader);
414 free(tid_writer);
415 free(count_reader);
416 free(count_writer);
417 free(tot_nr_reads);
418 free(tot_nr_writes);
419 return 0;
420}
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