Add wfcqueue header to cds.h
[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>
9e97e478 34#include <sched.h>
94b343fd 35#include <errno.h>
10c48e14 36
ec4e58a3 37#include <urcu/arch.h>
bd252a04 38#include <urcu/tls-compat.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
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89static inline void loop_sleep(unsigned long l)
90{
91 while(l-- != 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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109#ifndef HAVE_CPU_SET_T
110typedef unsigned long cpu_set_t;
111# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
112# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
113#endif
114
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115static void set_affinity(void)
116{
117 cpu_set_t mask;
118 int cpu;
6af882ba 119 int ret;
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120
121 if (!use_affinity)
122 return;
123
d8540fc5 124#if HAVE_SCHED_SETAFFINITY
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125 ret = pthread_mutex_lock(&affinity_mutex);
126 if (ret) {
127 perror("Error in pthread mutex lock");
128 exit(-1);
129 }
2a7ac59d 130 cpu = cpu_affinities[next_aff++];
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131 ret = pthread_mutex_unlock(&affinity_mutex);
132 if (ret) {
133 perror("Error in pthread mutex unlock");
134 exit(-1);
135 }
d8540fc5 136
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137 CPU_ZERO(&mask);
138 CPU_SET(cpu, &mask);
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139#if SCHED_SETAFFINITY_ARGS == 2
140 sched_setaffinity(0, &mask);
141#else
2a7ac59d 142 sched_setaffinity(0, sizeof(mask), &mask);
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143#endif
144#endif /* HAVE_SCHED_SETAFFINITY */
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145}
146
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147/*
148 * returns 0 if test should end.
149 */
150static int test_duration_write(void)
151{
78efb485 152 return !test_stop;
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153}
154
155static int test_duration_read(void)
156{
78efb485 157 return !test_stop;
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158}
159
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160static DEFINE_URCU_TLS(unsigned long long, nr_writes);
161static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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162
163static unsigned int nr_readers;
164static unsigned int nr_writers;
165
166pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
167
168void rcu_copy_mutex_lock(void)
169{
170 int ret;
171 ret = pthread_mutex_lock(&rcu_copy_mutex);
172 if (ret) {
173 perror("Error in pthread mutex lock");
174 exit(-1);
175 }
176}
177
178void rcu_copy_mutex_unlock(void)
179{
180 int ret;
181
182 ret = pthread_mutex_unlock(&rcu_copy_mutex);
183 if (ret) {
184 perror("Error in pthread mutex unlock");
185 exit(-1);
186 }
187}
188
189void *thr_reader(void *_count)
190{
191 unsigned long long *count = _count;
192
4bad7d45 193 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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194 "reader", pthread_self(), (unsigned long)gettid());
195
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196 set_affinity();
197
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198 while (!test_go)
199 {
200 }
201
202 for (;;) {
203 pthread_rwlock_rdlock(&lock);
204 assert(test_array.a == 8);
a0b7f7ea 205 if (caa_unlikely(rduration))
daddf5b0 206 loop_sleep(rduration);
10c48e14 207 pthread_rwlock_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 *count = URCU_TLS(nr_reads);
4bad7d45 214 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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215 "reader", pthread_self(), (unsigned long)gettid());
216 return ((void*)1);
217
218}
219
220void *thr_writer(void *_count)
221{
222 unsigned long long *count = _count;
223
4bad7d45 224 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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225 "writer", pthread_self(), (unsigned long)gettid());
226
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227 set_affinity();
228
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229 while (!test_go)
230 {
231 }
5481ddb3 232 cmm_smp_mb();
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233
234 for (;;) {
235 pthread_rwlock_wrlock(&lock);
2b4e4125 236 test_array.a = 0;
10c48e14 237 test_array.a = 8;
a0b7f7ea 238 if (caa_unlikely(wduration))
31b598e0 239 loop_sleep(wduration);
10c48e14 240 pthread_rwlock_unlock(&lock);
bd252a04 241 URCU_TLS(nr_writes)++;
a0b7f7ea 242 if (caa_unlikely(!test_duration_write()))
10c48e14 243 break;
a0b7f7ea 244 if (caa_unlikely(wdelay))
9e31d0f0 245 loop_sleep(wdelay);
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246 }
247
4bad7d45 248 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
10c48e14 249 "writer", pthread_self(), (unsigned long)gettid());
bd252a04 250 *count = URCU_TLS(nr_writes);
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251 return ((void*)2);
252}
253
254void show_usage(int argc, char **argv)
255{
256 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
257#ifdef DEBUG_YIELD
258 printf(" [-r] [-w] (yield reader and/or writer)");
259#endif
7685d963 260 printf(" [-d delay] (writer period (us))");
daddf5b0 261 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 262 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 263 printf(" [-v] (verbose output)");
9e97e478 264 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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265 printf("\n");
266}
267
268int main(int argc, char **argv)
269{
270 int err;
271 pthread_t *tid_reader, *tid_writer;
272 void *tret;
273 unsigned long long *count_reader, *count_writer;
274 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 275 int i, a;
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276
277 if (argc < 4) {
278 show_usage(argc, argv);
279 return -1;
280 }
5481ddb3 281 cmm_smp_mb();
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282
283 err = sscanf(argv[1], "%u", &nr_readers);
284 if (err != 1) {
285 show_usage(argc, argv);
286 return -1;
287 }
288
289 err = sscanf(argv[2], "%u", &nr_writers);
290 if (err != 1) {
291 show_usage(argc, argv);
292 return -1;
293 }
294
295 err = sscanf(argv[3], "%lu", &duration);
296 if (err != 1) {
297 show_usage(argc, argv);
298 return -1;
299 }
300
301 for (i = 4; i < argc; i++) {
302 if (argv[i][0] != '-')
303 continue;
304 switch (argv[i][1]) {
305#ifdef DEBUG_YIELD
306 case 'r':
307 yield_active |= YIELD_READ;
308 break;
309 case 'w':
310 yield_active |= YIELD_WRITE;
311 break;
312#endif
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313 case 'a':
314 if (argc < i + 2) {
315 show_usage(argc, argv);
316 return -1;
317 }
318 a = atoi(argv[++i]);
2a7ac59d 319 cpu_affinities[next_aff++] = a;
9e97e478 320 use_affinity = 1;
4bad7d45 321 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 322 break;
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323 case 'c':
324 if (argc < i + 2) {
325 show_usage(argc, argv);
326 return -1;
327 }
9e31d0f0 328 rduration = atol(argv[++i]);
8b632bab 329 break;
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330 case 'd':
331 if (argc < i + 2) {
332 show_usage(argc, argv);
333 return -1;
334 }
9e31d0f0 335 wdelay = atol(argv[++i]);
10c48e14 336 break;
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337 case 'e':
338 if (argc < i + 2) {
339 show_usage(argc, argv);
340 return -1;
341 }
342 wduration = atol(argv[++i]);
343 break;
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344 case 'v':
345 verbose_mode = 1;
346 break;
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347 }
348 }
349
4bad7d45 350 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 351 duration, nr_readers, nr_writers);
9e31d0f0 352 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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353 printf_verbose("Reader duration : %lu loops.\n", rduration);
354 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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355 "main", pthread_self(), (unsigned long)gettid());
356
357 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
358 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
359 count_reader = malloc(sizeof(*count_reader) * nr_readers);
360 count_writer = malloc(sizeof(*count_writer) * nr_writers);
361
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362 next_aff = 0;
363
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364 for (i = 0; i < nr_readers; i++) {
365 err = pthread_create(&tid_reader[i], NULL, thr_reader,
366 &count_reader[i]);
367 if (err != 0)
368 exit(1);
369 }
370 for (i = 0; i < nr_writers; i++) {
371 err = pthread_create(&tid_writer[i], NULL, thr_writer,
372 &count_writer[i]);
373 if (err != 0)
374 exit(1);
375 }
376
5481ddb3 377 cmm_smp_mb();
10c48e14 378
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379 test_go = 1;
380
381 sleep(duration);
382
383 test_stop = 1;
384
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385 for (i = 0; i < nr_readers; i++) {
386 err = pthread_join(tid_reader[i], &tret);
387 if (err != 0)
388 exit(1);
389 tot_reads += count_reader[i];
390 }
391 for (i = 0; i < nr_writers; i++) {
392 err = pthread_join(tid_writer[i], &tret);
393 if (err != 0)
394 exit(1);
395 tot_writes += count_writer[i];
396 }
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397
398 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 399 tot_writes);
a50a7b43 400 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 401 "nr_writers %3u "
9e31d0f0 402 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 403 argv[0], duration, nr_readers, rduration, wduration,
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404 nr_writers, wdelay, tot_reads, tot_writes,
405 tot_reads + tot_writes);
406
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407 free(tid_reader);
408 free(tid_writer);
409 free(count_reader);
410 free(count_writer);
411 return 0;
412}
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