Reinsert missing test_urcu_*.c files (missing in rename)
[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>
7685d963 38
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39#ifdef __linux__
40#include <syscall.h>
41#endif
42
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43/* hardcoded number of CPUs */
44#define NR_CPUS 16384
45
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46#if defined(_syscall0)
47_syscall0(pid_t, gettid)
48#elif defined(__NR_gettid)
49static inline pid_t gettid(void)
50{
51 return syscall(__NR_gettid);
52}
53#else
54#warning "use pid as tid"
55static inline pid_t gettid(void)
56{
57 return getpid();
58}
59#endif
60
61#ifndef DYNAMIC_LINK_TEST
62#define _LGPL_SOURCE
63#else
64#define debug_yield_read()
65#endif
ec4e58a3 66#include <urcu.h>
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67
68struct test_array {
69 int a;
70};
71
72pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
73
78efb485 74static volatile int test_go, test_stop;
10c48e14 75
9e31d0f0 76static unsigned long wdelay;
10c48e14 77
2b4e4125 78static volatile struct test_array test_array = { 8 };
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79
80static unsigned long duration;
10c48e14 81
daddf5b0 82/* read-side C.S. duration, in loops */
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83static unsigned long rduration;
84
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85/* write-side C.S. duration, in loops */
86static unsigned long wduration;
87
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88static inline void loop_sleep(unsigned long l)
89{
90 while(l-- != 0)
06f22bdb 91 caa_cpu_relax();
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92}
93
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94static int verbose_mode;
95
96#define printf_verbose(fmt, args...) \
97 do { \
98 if (verbose_mode) \
99 printf(fmt, args); \
100 } while (0)
101
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102static unsigned int cpu_affinities[NR_CPUS];
103static unsigned int next_aff = 0;
104static int use_affinity = 0;
105
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106pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
107
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108#ifndef HAVE_CPU_SET_T
109typedef unsigned long cpu_set_t;
110# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
111# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
112#endif
113
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114static void set_affinity(void)
115{
116 cpu_set_t mask;
117 int cpu;
6af882ba 118 int ret;
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119
120 if (!use_affinity)
121 return;
122
d8540fc5 123#if HAVE_SCHED_SETAFFINITY
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124 ret = pthread_mutex_lock(&affinity_mutex);
125 if (ret) {
126 perror("Error in pthread mutex lock");
127 exit(-1);
128 }
2a7ac59d 129 cpu = cpu_affinities[next_aff++];
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130 ret = pthread_mutex_unlock(&affinity_mutex);
131 if (ret) {
132 perror("Error in pthread mutex unlock");
133 exit(-1);
134 }
d8540fc5 135
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136 CPU_ZERO(&mask);
137 CPU_SET(cpu, &mask);
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138#if SCHED_SETAFFINITY_ARGS == 2
139 sched_setaffinity(0, &mask);
140#else
2a7ac59d 141 sched_setaffinity(0, sizeof(mask), &mask);
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142#endif
143#endif /* HAVE_SCHED_SETAFFINITY */
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144}
145
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146/*
147 * returns 0 if test should end.
148 */
149static int test_duration_write(void)
150{
78efb485 151 return !test_stop;
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152}
153
154static int test_duration_read(void)
155{
78efb485 156 return !test_stop;
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157}
158
159static unsigned long long __thread nr_writes;
160static unsigned long long __thread nr_reads;
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 *_count)
189{
190 unsigned long long *count = _count;
191
4bad7d45 192 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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193 "reader", pthread_self(), (unsigned long)gettid());
194
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195 set_affinity();
196
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197 while (!test_go)
198 {
199 }
200
201 for (;;) {
202 pthread_rwlock_rdlock(&lock);
203 assert(test_array.a == 8);
8b632bab 204 if (unlikely(rduration))
daddf5b0 205 loop_sleep(rduration);
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206 pthread_rwlock_unlock(&lock);
207 nr_reads++;
59d5a406 208 if (unlikely(!test_duration_read()))
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209 break;
210 }
211
212 *count = nr_reads;
4bad7d45 213 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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214 "reader", pthread_self(), (unsigned long)gettid());
215 return ((void*)1);
216
217}
218
219void *thr_writer(void *_count)
220{
221 unsigned long long *count = _count;
222
4bad7d45 223 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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224 "writer", pthread_self(), (unsigned long)gettid());
225
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226 set_affinity();
227
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228 while (!test_go)
229 {
230 }
5481ddb3 231 cmm_smp_mb();
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232
233 for (;;) {
234 pthread_rwlock_wrlock(&lock);
2b4e4125 235 test_array.a = 0;
10c48e14 236 test_array.a = 8;
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237 if (unlikely(wduration))
238 loop_sleep(wduration);
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239 pthread_rwlock_unlock(&lock);
240 nr_writes++;
59d5a406 241 if (unlikely(!test_duration_write()))
10c48e14 242 break;
59d5a406 243 if (unlikely(wdelay))
9e31d0f0 244 loop_sleep(wdelay);
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245 }
246
4bad7d45 247 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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248 "writer", pthread_self(), (unsigned long)gettid());
249 *count = nr_writes;
250 return ((void*)2);
251}
252
253void show_usage(int argc, char **argv)
254{
255 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
256#ifdef DEBUG_YIELD
257 printf(" [-r] [-w] (yield reader and/or writer)");
258#endif
7685d963 259 printf(" [-d delay] (writer period (us))");
daddf5b0 260 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 261 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 262 printf(" [-v] (verbose output)");
9e97e478 263 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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264 printf("\n");
265}
266
267int main(int argc, char **argv)
268{
269 int err;
270 pthread_t *tid_reader, *tid_writer;
271 void *tret;
272 unsigned long long *count_reader, *count_writer;
273 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 274 int i, a;
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275
276 if (argc < 4) {
277 show_usage(argc, argv);
278 return -1;
279 }
5481ddb3 280 cmm_smp_mb();
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281
282 err = sscanf(argv[1], "%u", &nr_readers);
283 if (err != 1) {
284 show_usage(argc, argv);
285 return -1;
286 }
287
288 err = sscanf(argv[2], "%u", &nr_writers);
289 if (err != 1) {
290 show_usage(argc, argv);
291 return -1;
292 }
293
294 err = sscanf(argv[3], "%lu", &duration);
295 if (err != 1) {
296 show_usage(argc, argv);
297 return -1;
298 }
299
300 for (i = 4; i < argc; i++) {
301 if (argv[i][0] != '-')
302 continue;
303 switch (argv[i][1]) {
304#ifdef DEBUG_YIELD
305 case 'r':
306 yield_active |= YIELD_READ;
307 break;
308 case 'w':
309 yield_active |= YIELD_WRITE;
310 break;
311#endif
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312 case 'a':
313 if (argc < i + 2) {
314 show_usage(argc, argv);
315 return -1;
316 }
317 a = atoi(argv[++i]);
2a7ac59d 318 cpu_affinities[next_aff++] = a;
9e97e478 319 use_affinity = 1;
4bad7d45 320 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 321 break;
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322 case 'c':
323 if (argc < i + 2) {
324 show_usage(argc, argv);
325 return -1;
326 }
9e31d0f0 327 rduration = atol(argv[++i]);
8b632bab 328 break;
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329 case 'd':
330 if (argc < i + 2) {
331 show_usage(argc, argv);
332 return -1;
333 }
9e31d0f0 334 wdelay = atol(argv[++i]);
10c48e14 335 break;
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336 case 'e':
337 if (argc < i + 2) {
338 show_usage(argc, argv);
339 return -1;
340 }
341 wduration = atol(argv[++i]);
342 break;
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343 case 'v':
344 verbose_mode = 1;
345 break;
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346 }
347 }
348
4bad7d45 349 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 350 duration, nr_readers, nr_writers);
9e31d0f0 351 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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352 printf_verbose("Reader duration : %lu loops.\n", rduration);
353 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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354 "main", pthread_self(), (unsigned long)gettid());
355
356 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
357 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
358 count_reader = malloc(sizeof(*count_reader) * nr_readers);
359 count_writer = malloc(sizeof(*count_writer) * nr_writers);
360
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361 next_aff = 0;
362
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363 for (i = 0; i < nr_readers; i++) {
364 err = pthread_create(&tid_reader[i], NULL, thr_reader,
365 &count_reader[i]);
366 if (err != 0)
367 exit(1);
368 }
369 for (i = 0; i < nr_writers; i++) {
370 err = pthread_create(&tid_writer[i], NULL, thr_writer,
371 &count_writer[i]);
372 if (err != 0)
373 exit(1);
374 }
375
5481ddb3 376 cmm_smp_mb();
10c48e14 377
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378 test_go = 1;
379
380 sleep(duration);
381
382 test_stop = 1;
383
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384 for (i = 0; i < nr_readers; i++) {
385 err = pthread_join(tid_reader[i], &tret);
386 if (err != 0)
387 exit(1);
388 tot_reads += count_reader[i];
389 }
390 for (i = 0; i < nr_writers; i++) {
391 err = pthread_join(tid_writer[i], &tret);
392 if (err != 0)
393 exit(1);
394 tot_writes += count_writer[i];
395 }
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396
397 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 398 tot_writes);
a50a7b43 399 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 400 "nr_writers %3u "
9e31d0f0 401 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 402 argv[0], duration, nr_readers, rduration, wduration,
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403 nr_writers, wdelay, tot_reads, tot_writes,
404 tot_reads + tot_writes);
405
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406 free(tid_reader);
407 free(tid_writer);
408 free(count_reader);
409 free(count_writer);
410 return 0;
411}
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