Add missing urcu-defer.{so,h} and urcu-defer-static.h
[urcu.git] / tests / test_rwlock.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
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
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24#include <stdio.h>
25#include <pthread.h>
26#include <stdlib.h>
27#include <string.h>
28#include <sys/types.h>
29#include <sys/wait.h>
30#include <unistd.h>
31#include <stdio.h>
32#include <assert.h>
33#include <sys/syscall.h>
9e97e478 34#include <sched.h>
10c48e14 35
833dbdb6 36#include "../arch.h"
7685d963 37
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38/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
39#define CACHE_LINE_SIZE 4096
40
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41/* hardcoded number of CPUs */
42#define NR_CPUS 16384
43
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44#if defined(_syscall0)
45_syscall0(pid_t, gettid)
46#elif defined(__NR_gettid)
47static inline pid_t gettid(void)
48{
49 return syscall(__NR_gettid);
50}
51#else
52#warning "use pid as tid"
53static inline pid_t gettid(void)
54{
55 return getpid();
56}
57#endif
58
59#ifndef DYNAMIC_LINK_TEST
60#define _LGPL_SOURCE
61#else
62#define debug_yield_read()
63#endif
833dbdb6 64#include "../urcu.h"
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65
66struct test_array {
67 int a;
68};
69
70pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
71
78efb485 72static volatile int test_go, test_stop;
10c48e14 73
9e31d0f0 74static unsigned long wdelay;
10c48e14 75
2b4e4125 76static volatile struct test_array test_array = { 8 };
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77
78static unsigned long duration;
10c48e14 79
daddf5b0 80/* read-side C.S. duration, in loops */
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81static unsigned long rduration;
82
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83static inline void loop_sleep(unsigned long l)
84{
85 while(l-- != 0)
86 cpu_relax();
87}
88
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89static int verbose_mode;
90
91#define printf_verbose(fmt, args...) \
92 do { \
93 if (verbose_mode) \
94 printf(fmt, args); \
95 } while (0)
96
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97static unsigned int cpu_affinities[NR_CPUS];
98static unsigned int next_aff = 0;
99static int use_affinity = 0;
100
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101pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
102
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103static void set_affinity(void)
104{
105 cpu_set_t mask;
106 int cpu;
6af882ba 107 int ret;
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108
109 if (!use_affinity)
110 return;
111
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112 ret = pthread_mutex_lock(&affinity_mutex);
113 if (ret) {
114 perror("Error in pthread mutex lock");
115 exit(-1);
116 }
2a7ac59d 117 cpu = cpu_affinities[next_aff++];
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118 ret = pthread_mutex_unlock(&affinity_mutex);
119 if (ret) {
120 perror("Error in pthread mutex unlock");
121 exit(-1);
122 }
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123 CPU_ZERO(&mask);
124 CPU_SET(cpu, &mask);
125 sched_setaffinity(0, sizeof(mask), &mask);
126}
127
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128/*
129 * returns 0 if test should end.
130 */
131static int test_duration_write(void)
132{
78efb485 133 return !test_stop;
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134}
135
136static int test_duration_read(void)
137{
78efb485 138 return !test_stop;
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139}
140
141static unsigned long long __thread nr_writes;
142static unsigned long long __thread nr_reads;
143
144static unsigned int nr_readers;
145static unsigned int nr_writers;
146
147pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
148
149void rcu_copy_mutex_lock(void)
150{
151 int ret;
152 ret = pthread_mutex_lock(&rcu_copy_mutex);
153 if (ret) {
154 perror("Error in pthread mutex lock");
155 exit(-1);
156 }
157}
158
159void rcu_copy_mutex_unlock(void)
160{
161 int ret;
162
163 ret = pthread_mutex_unlock(&rcu_copy_mutex);
164 if (ret) {
165 perror("Error in pthread mutex unlock");
166 exit(-1);
167 }
168}
169
170void *thr_reader(void *_count)
171{
172 unsigned long long *count = _count;
173
4bad7d45 174 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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175 "reader", pthread_self(), (unsigned long)gettid());
176
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177 set_affinity();
178
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179 while (!test_go)
180 {
181 }
182
183 for (;;) {
184 pthread_rwlock_rdlock(&lock);
185 assert(test_array.a == 8);
8b632bab 186 if (unlikely(rduration))
daddf5b0 187 loop_sleep(rduration);
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188 pthread_rwlock_unlock(&lock);
189 nr_reads++;
59d5a406 190 if (unlikely(!test_duration_read()))
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191 break;
192 }
193
194 *count = nr_reads;
4bad7d45 195 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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196 "reader", pthread_self(), (unsigned long)gettid());
197 return ((void*)1);
198
199}
200
201void *thr_writer(void *_count)
202{
203 unsigned long long *count = _count;
204
4bad7d45 205 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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206 "writer", pthread_self(), (unsigned long)gettid());
207
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208 set_affinity();
209
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210 while (!test_go)
211 {
212 }
7685d963 213 smp_mb();
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214
215 for (;;) {
216 pthread_rwlock_wrlock(&lock);
2b4e4125 217 test_array.a = 0;
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218 test_array.a = 8;
219 pthread_rwlock_unlock(&lock);
220 nr_writes++;
59d5a406 221 if (unlikely(!test_duration_write()))
10c48e14 222 break;
59d5a406 223 if (unlikely(wdelay))
9e31d0f0 224 loop_sleep(wdelay);
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225 }
226
4bad7d45 227 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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228 "writer", pthread_self(), (unsigned long)gettid());
229 *count = nr_writes;
230 return ((void*)2);
231}
232
233void show_usage(int argc, char **argv)
234{
235 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
236#ifdef DEBUG_YIELD
237 printf(" [-r] [-w] (yield reader and/or writer)");
238#endif
7685d963 239 printf(" [-d delay] (writer period (us))");
daddf5b0 240 printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45 241 printf(" [-v] (verbose output)");
9e97e478 242 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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243 printf("\n");
244}
245
246int main(int argc, char **argv)
247{
248 int err;
249 pthread_t *tid_reader, *tid_writer;
250 void *tret;
251 unsigned long long *count_reader, *count_writer;
252 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 253 int i, a;
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254
255 if (argc < 4) {
256 show_usage(argc, argv);
257 return -1;
258 }
7685d963 259 smp_mb();
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260
261 err = sscanf(argv[1], "%u", &nr_readers);
262 if (err != 1) {
263 show_usage(argc, argv);
264 return -1;
265 }
266
267 err = sscanf(argv[2], "%u", &nr_writers);
268 if (err != 1) {
269 show_usage(argc, argv);
270 return -1;
271 }
272
273 err = sscanf(argv[3], "%lu", &duration);
274 if (err != 1) {
275 show_usage(argc, argv);
276 return -1;
277 }
278
279 for (i = 4; i < argc; i++) {
280 if (argv[i][0] != '-')
281 continue;
282 switch (argv[i][1]) {
283#ifdef DEBUG_YIELD
284 case 'r':
285 yield_active |= YIELD_READ;
286 break;
287 case 'w':
288 yield_active |= YIELD_WRITE;
289 break;
290#endif
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291 case 'a':
292 if (argc < i + 2) {
293 show_usage(argc, argv);
294 return -1;
295 }
296 a = atoi(argv[++i]);
2a7ac59d 297 cpu_affinities[next_aff++] = a;
9e97e478 298 use_affinity = 1;
4bad7d45 299 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 300 break;
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301 case 'c':
302 if (argc < i + 2) {
303 show_usage(argc, argv);
304 return -1;
305 }
9e31d0f0 306 rduration = atol(argv[++i]);
8b632bab 307 break;
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308 case 'd':
309 if (argc < i + 2) {
310 show_usage(argc, argv);
311 return -1;
312 }
9e31d0f0 313 wdelay = atol(argv[++i]);
10c48e14 314 break;
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315 case 'v':
316 verbose_mode = 1;
317 break;
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318 }
319 }
320
4bad7d45 321 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 322 duration, nr_readers, nr_writers);
9e31d0f0 323 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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324 printf_verbose("Reader duration : %lu loops.\n", rduration);
325 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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326 "main", pthread_self(), (unsigned long)gettid());
327
328 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
329 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
330 count_reader = malloc(sizeof(*count_reader) * nr_readers);
331 count_writer = malloc(sizeof(*count_writer) * nr_writers);
332
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333 next_aff = 0;
334
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335 for (i = 0; i < nr_readers; i++) {
336 err = pthread_create(&tid_reader[i], NULL, thr_reader,
337 &count_reader[i]);
338 if (err != 0)
339 exit(1);
340 }
341 for (i = 0; i < nr_writers; i++) {
342 err = pthread_create(&tid_writer[i], NULL, thr_writer,
343 &count_writer[i]);
344 if (err != 0)
345 exit(1);
346 }
347
7685d963 348 smp_mb();
10c48e14 349
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350 test_go = 1;
351
352 sleep(duration);
353
354 test_stop = 1;
355
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356 for (i = 0; i < nr_readers; i++) {
357 err = pthread_join(tid_reader[i], &tret);
358 if (err != 0)
359 exit(1);
360 tot_reads += count_reader[i];
361 }
362 for (i = 0; i < nr_writers; i++) {
363 err = pthread_join(tid_writer[i], &tret);
364 if (err != 0)
365 exit(1);
366 tot_writes += count_writer[i];
367 }
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368
369 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 370 tot_writes);
6a190115 371 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d 372 "nr_writers %3u "
9e31d0f0 373 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
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374 argv[0], duration, nr_readers, rduration,
375 nr_writers, wdelay, tot_reads, tot_writes,
376 tot_reads + tot_writes);
377
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378 free(tid_reader);
379 free(tid_writer);
380 free(count_reader);
381 free(count_writer);
382 return 0;
383}
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