Implement thread-id.h wrapper
[urcu.git] / tests / test_rwlock.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
9e97e478 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>
10c48e14 35
ec4e58a3 36#include <urcu/arch.h>
bd252a04 37#include <urcu/tls-compat.h>
2953b501 38#include "cpuset.h"
7685d963 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
73pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
74
78efb485 75static volatile int test_go, test_stop;
10c48e14 76
9e31d0f0 77static unsigned long wdelay;
10c48e14 78
2b4e4125 79static volatile struct test_array test_array = { 8 };
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80
81static unsigned long duration;
10c48e14 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 }
d8540fc5 131
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132 CPU_ZERO(&mask);
133 CPU_SET(cpu, &mask);
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134#if SCHED_SETAFFINITY_ARGS == 2
135 sched_setaffinity(0, &mask);
136#else
2a7ac59d 137 sched_setaffinity(0, sizeof(mask), &mask);
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138#endif
139#endif /* HAVE_SCHED_SETAFFINITY */
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140}
141
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142/*
143 * returns 0 if test should end.
144 */
145static int test_duration_write(void)
146{
78efb485 147 return !test_stop;
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148}
149
150static int test_duration_read(void)
151{
78efb485 152 return !test_stop;
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153}
154
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155static DEFINE_URCU_TLS(unsigned long long, nr_writes);
156static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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157
158static unsigned int nr_readers;
159static unsigned int nr_writers;
160
161pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
162
163void rcu_copy_mutex_lock(void)
164{
165 int ret;
166 ret = pthread_mutex_lock(&rcu_copy_mutex);
167 if (ret) {
168 perror("Error in pthread mutex lock");
169 exit(-1);
170 }
171}
172
173void rcu_copy_mutex_unlock(void)
174{
175 int ret;
176
177 ret = pthread_mutex_unlock(&rcu_copy_mutex);
178 if (ret) {
179 perror("Error in pthread mutex unlock");
180 exit(-1);
181 }
182}
183
184void *thr_reader(void *_count)
185{
186 unsigned long long *count = _count;
187
4bad7d45 188 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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189 "reader", (unsigned long) pthread_self(),
190 (unsigned long) gettid());
10c48e14 191
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192 set_affinity();
193
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194 while (!test_go)
195 {
196 }
197
198 for (;;) {
199 pthread_rwlock_rdlock(&lock);
200 assert(test_array.a == 8);
a0b7f7ea 201 if (caa_unlikely(rduration))
daddf5b0 202 loop_sleep(rduration);
10c48e14 203 pthread_rwlock_unlock(&lock);
bd252a04 204 URCU_TLS(nr_reads)++;
a0b7f7ea 205 if (caa_unlikely(!test_duration_read()))
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206 break;
207 }
208
bd252a04 209 *count = URCU_TLS(nr_reads);
4bad7d45 210 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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211 "reader", (unsigned long) pthread_self(),
212 (unsigned long) gettid());
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213 return ((void*)1);
214
215}
216
217void *thr_writer(void *_count)
218{
219 unsigned long long *count = _count;
220
4bad7d45 221 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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222 "writer", (unsigned long) pthread_self(),
223 (unsigned long) gettid());
10c48e14 224
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225 set_affinity();
226
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227 while (!test_go)
228 {
229 }
5481ddb3 230 cmm_smp_mb();
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231
232 for (;;) {
233 pthread_rwlock_wrlock(&lock);
2b4e4125 234 test_array.a = 0;
10c48e14 235 test_array.a = 8;
a0b7f7ea 236 if (caa_unlikely(wduration))
31b598e0 237 loop_sleep(wduration);
10c48e14 238 pthread_rwlock_unlock(&lock);
bd252a04 239 URCU_TLS(nr_writes)++;
a0b7f7ea 240 if (caa_unlikely(!test_duration_write()))
10c48e14 241 break;
a0b7f7ea 242 if (caa_unlikely(wdelay))
9e31d0f0 243 loop_sleep(wdelay);
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244 }
245
4bad7d45 246 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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247 "writer", (unsigned long) pthread_self(),
248 (unsigned long) gettid());
bd252a04 249 *count = URCU_TLS(nr_writes);
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250 return ((void*)2);
251}
252
253void show_usage(int argc, char **argv)
254{
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255 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
256 argv[0]);
257 printf("OPTIONS:\n");
10c48e14 258#ifdef DEBUG_YIELD
06637138 259 printf(" [-r] [-w] (yield reader and/or writer)\n");
10c48e14 260#endif
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261 printf(" [-d delay] (writer period (us))\n");
262 printf(" [-c duration] (reader C.S. duration (in loops))\n");
263 printf(" [-e duration] (writer C.S. duration (in loops))\n");
264 printf(" [-v] (verbose output)\n");
265 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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266 printf("\n");
267}
268
269int main(int argc, char **argv)
270{
271 int err;
272 pthread_t *tid_reader, *tid_writer;
273 void *tret;
274 unsigned long long *count_reader, *count_writer;
275 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 276 int i, a;
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277
278 if (argc < 4) {
279 show_usage(argc, argv);
280 return -1;
281 }
5481ddb3 282 cmm_smp_mb();
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283
284 err = sscanf(argv[1], "%u", &nr_readers);
285 if (err != 1) {
286 show_usage(argc, argv);
287 return -1;
288 }
289
290 err = sscanf(argv[2], "%u", &nr_writers);
291 if (err != 1) {
292 show_usage(argc, argv);
293 return -1;
294 }
295
296 err = sscanf(argv[3], "%lu", &duration);
297 if (err != 1) {
298 show_usage(argc, argv);
299 return -1;
300 }
301
302 for (i = 4; i < argc; i++) {
303 if (argv[i][0] != '-')
304 continue;
305 switch (argv[i][1]) {
306#ifdef DEBUG_YIELD
307 case 'r':
308 yield_active |= YIELD_READ;
309 break;
310 case 'w':
311 yield_active |= YIELD_WRITE;
312 break;
313#endif
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314 case 'a':
315 if (argc < i + 2) {
316 show_usage(argc, argv);
317 return -1;
318 }
319 a = atoi(argv[++i]);
2a7ac59d 320 cpu_affinities[next_aff++] = a;
9e97e478 321 use_affinity = 1;
4bad7d45 322 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 323 break;
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324 case 'c':
325 if (argc < i + 2) {
326 show_usage(argc, argv);
327 return -1;
328 }
9e31d0f0 329 rduration = atol(argv[++i]);
8b632bab 330 break;
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331 case 'd':
332 if (argc < i + 2) {
333 show_usage(argc, argv);
334 return -1;
335 }
9e31d0f0 336 wdelay = atol(argv[++i]);
10c48e14 337 break;
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338 case 'e':
339 if (argc < i + 2) {
340 show_usage(argc, argv);
341 return -1;
342 }
343 wduration = atol(argv[++i]);
344 break;
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345 case 'v':
346 verbose_mode = 1;
347 break;
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348 }
349 }
350
4bad7d45 351 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 352 duration, nr_readers, nr_writers);
9e31d0f0 353 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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354 printf_verbose("Reader duration : %lu loops.\n", rduration);
355 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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356 "main", (unsigned long) pthread_self(),
357 (unsigned long) gettid());
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358
359 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
360 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
361 count_reader = malloc(sizeof(*count_reader) * nr_readers);
362 count_writer = malloc(sizeof(*count_writer) * nr_writers);
363
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364 next_aff = 0;
365
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366 for (i = 0; i < nr_readers; i++) {
367 err = pthread_create(&tid_reader[i], NULL, thr_reader,
368 &count_reader[i]);
369 if (err != 0)
370 exit(1);
371 }
372 for (i = 0; i < nr_writers; i++) {
373 err = pthread_create(&tid_writer[i], NULL, thr_writer,
374 &count_writer[i]);
375 if (err != 0)
376 exit(1);
377 }
378
5481ddb3 379 cmm_smp_mb();
10c48e14 380
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381 test_go = 1;
382
383 sleep(duration);
384
385 test_stop = 1;
386
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387 for (i = 0; i < nr_readers; i++) {
388 err = pthread_join(tid_reader[i], &tret);
389 if (err != 0)
390 exit(1);
391 tot_reads += count_reader[i];
392 }
393 for (i = 0; i < nr_writers; i++) {
394 err = pthread_join(tid_writer[i], &tret);
395 if (err != 0)
396 exit(1);
397 tot_writes += count_writer[i];
398 }
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399
400 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 401 tot_writes);
a50a7b43 402 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 403 "nr_writers %3u "
9e31d0f0 404 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 405 argv[0], duration, nr_readers, rduration, wduration,
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406 nr_writers, wdelay, tot_reads, tot_writes,
407 tot_reads + tot_writes);
408
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409 free(tid_reader);
410 free(tid_writer);
411 free(count_reader);
412 free(count_writer);
413 return 0;
414}
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