test_urcu_hash*: initialize TLS seeds
[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"
94df6318 39#include "thread-id.h"
65fcc7e9 40
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41/* hardcoded number of CPUs */
42#define NR_CPUS 16384
43
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44#ifndef DYNAMIC_LINK_TEST
45#define _LGPL_SOURCE
46#else
47#define debug_yield_read()
48#endif
ec4e58a3 49#include <urcu.h>
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50
51struct test_array {
52 int a;
53};
54
55pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
56
78efb485 57static volatile int test_go, test_stop;
10c48e14 58
9e31d0f0 59static unsigned long wdelay;
10c48e14 60
2b4e4125 61static volatile struct test_array test_array = { 8 };
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62
63static unsigned long duration;
10c48e14 64
daddf5b0 65/* read-side C.S. duration, in loops */
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66static unsigned long rduration;
67
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68/* write-side C.S. duration, in loops */
69static unsigned long wduration;
70
ab0aacbe 71static inline void loop_sleep(unsigned long loops)
daddf5b0 72{
ab0aacbe 73 while (loops-- != 0)
06f22bdb 74 caa_cpu_relax();
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75}
76
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77static int verbose_mode;
78
79#define printf_verbose(fmt, args...) \
80 do { \
81 if (verbose_mode) \
82 printf(fmt, args); \
83 } while (0)
84
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85static unsigned int cpu_affinities[NR_CPUS];
86static unsigned int next_aff = 0;
87static int use_affinity = 0;
88
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89pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
90
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91static void set_affinity(void)
92{
95bc7fb9 93#if HAVE_SCHED_SETAFFINITY
2a7ac59d 94 cpu_set_t mask;
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95 int cpu, ret;
96#endif /* HAVE_SCHED_SETAFFINITY */
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97
98 if (!use_affinity)
99 return;
100
d8540fc5 101#if HAVE_SCHED_SETAFFINITY
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102 ret = pthread_mutex_lock(&affinity_mutex);
103 if (ret) {
104 perror("Error in pthread mutex lock");
105 exit(-1);
106 }
2a7ac59d 107 cpu = cpu_affinities[next_aff++];
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108 ret = pthread_mutex_unlock(&affinity_mutex);
109 if (ret) {
110 perror("Error in pthread mutex unlock");
111 exit(-1);
112 }
d8540fc5 113
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114 CPU_ZERO(&mask);
115 CPU_SET(cpu, &mask);
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116#if SCHED_SETAFFINITY_ARGS == 2
117 sched_setaffinity(0, &mask);
118#else
2a7ac59d 119 sched_setaffinity(0, sizeof(mask), &mask);
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120#endif
121#endif /* HAVE_SCHED_SETAFFINITY */
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122}
123
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124/*
125 * returns 0 if test should end.
126 */
127static int test_duration_write(void)
128{
78efb485 129 return !test_stop;
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130}
131
132static int test_duration_read(void)
133{
78efb485 134 return !test_stop;
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135}
136
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137static DEFINE_URCU_TLS(unsigned long long, nr_writes);
138static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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139
140static unsigned int nr_readers;
141static unsigned int nr_writers;
142
143pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
144
145void rcu_copy_mutex_lock(void)
146{
147 int ret;
148 ret = pthread_mutex_lock(&rcu_copy_mutex);
149 if (ret) {
150 perror("Error in pthread mutex lock");
151 exit(-1);
152 }
153}
154
155void rcu_copy_mutex_unlock(void)
156{
157 int ret;
158
159 ret = pthread_mutex_unlock(&rcu_copy_mutex);
160 if (ret) {
161 perror("Error in pthread mutex unlock");
162 exit(-1);
163 }
164}
165
166void *thr_reader(void *_count)
167{
168 unsigned long long *count = _count;
169
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170 printf_verbose("thread_begin %s, tid %lu\n",
171 "reader", urcu_get_thread_id());
10c48e14 172
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173 set_affinity();
174
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175 while (!test_go)
176 {
177 }
178
179 for (;;) {
180 pthread_rwlock_rdlock(&lock);
181 assert(test_array.a == 8);
a0b7f7ea 182 if (caa_unlikely(rduration))
daddf5b0 183 loop_sleep(rduration);
10c48e14 184 pthread_rwlock_unlock(&lock);
bd252a04 185 URCU_TLS(nr_reads)++;
a0b7f7ea 186 if (caa_unlikely(!test_duration_read()))
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187 break;
188 }
189
bd252a04 190 *count = URCU_TLS(nr_reads);
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191 printf_verbose("thread_end %s, tid %lu\n",
192 "reader", urcu_get_thread_id());
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193 return ((void*)1);
194
195}
196
197void *thr_writer(void *_count)
198{
199 unsigned long long *count = _count;
200
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201 printf_verbose("thread_begin %s, tid %lu\n",
202 "writer", urcu_get_thread_id());
10c48e14 203
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204 set_affinity();
205
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206 while (!test_go)
207 {
208 }
5481ddb3 209 cmm_smp_mb();
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210
211 for (;;) {
212 pthread_rwlock_wrlock(&lock);
2b4e4125 213 test_array.a = 0;
10c48e14 214 test_array.a = 8;
a0b7f7ea 215 if (caa_unlikely(wduration))
31b598e0 216 loop_sleep(wduration);
10c48e14 217 pthread_rwlock_unlock(&lock);
bd252a04 218 URCU_TLS(nr_writes)++;
a0b7f7ea 219 if (caa_unlikely(!test_duration_write()))
10c48e14 220 break;
a0b7f7ea 221 if (caa_unlikely(wdelay))
9e31d0f0 222 loop_sleep(wdelay);
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223 }
224
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225 printf_verbose("thread_end %s, tid %lu\n",
226 "writer", urcu_get_thread_id());
bd252a04 227 *count = URCU_TLS(nr_writes);
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228 return ((void*)2);
229}
230
231void show_usage(int argc, char **argv)
232{
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233 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
234 argv[0]);
235 printf("OPTIONS:\n");
10c48e14 236#ifdef DEBUG_YIELD
06637138 237 printf(" [-r] [-w] (yield reader and/or writer)\n");
10c48e14 238#endif
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239 printf(" [-d delay] (writer period (us))\n");
240 printf(" [-c duration] (reader C.S. duration (in loops))\n");
241 printf(" [-e duration] (writer C.S. duration (in loops))\n");
242 printf(" [-v] (verbose output)\n");
243 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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244 printf("\n");
245}
246
247int main(int argc, char **argv)
248{
249 int err;
250 pthread_t *tid_reader, *tid_writer;
251 void *tret;
252 unsigned long long *count_reader, *count_writer;
253 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 254 int i, a;
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255
256 if (argc < 4) {
257 show_usage(argc, argv);
258 return -1;
259 }
5481ddb3 260 cmm_smp_mb();
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261
262 err = sscanf(argv[1], "%u", &nr_readers);
263 if (err != 1) {
264 show_usage(argc, argv);
265 return -1;
266 }
267
268 err = sscanf(argv[2], "%u", &nr_writers);
269 if (err != 1) {
270 show_usage(argc, argv);
271 return -1;
272 }
273
274 err = sscanf(argv[3], "%lu", &duration);
275 if (err != 1) {
276 show_usage(argc, argv);
277 return -1;
278 }
279
280 for (i = 4; i < argc; i++) {
281 if (argv[i][0] != '-')
282 continue;
283 switch (argv[i][1]) {
284#ifdef DEBUG_YIELD
285 case 'r':
286 yield_active |= YIELD_READ;
287 break;
288 case 'w':
289 yield_active |= YIELD_WRITE;
290 break;
291#endif
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292 case 'a':
293 if (argc < i + 2) {
294 show_usage(argc, argv);
295 return -1;
296 }
297 a = atoi(argv[++i]);
2a7ac59d 298 cpu_affinities[next_aff++] = a;
9e97e478 299 use_affinity = 1;
4bad7d45 300 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 301 break;
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302 case 'c':
303 if (argc < i + 2) {
304 show_usage(argc, argv);
305 return -1;
306 }
9e31d0f0 307 rduration = atol(argv[++i]);
8b632bab 308 break;
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309 case 'd':
310 if (argc < i + 2) {
311 show_usage(argc, argv);
312 return -1;
313 }
9e31d0f0 314 wdelay = atol(argv[++i]);
10c48e14 315 break;
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316 case 'e':
317 if (argc < i + 2) {
318 show_usage(argc, argv);
319 return -1;
320 }
321 wduration = atol(argv[++i]);
322 break;
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323 case 'v':
324 verbose_mode = 1;
325 break;
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326 }
327 }
328
4bad7d45 329 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 330 duration, nr_readers, nr_writers);
9e31d0f0 331 printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 332 printf_verbose("Reader duration : %lu loops.\n", rduration);
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333 printf_verbose("thread %-6s, tid %lu\n",
334 "main", urcu_get_thread_id());
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335
336 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
337 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
338 count_reader = malloc(sizeof(*count_reader) * nr_readers);
339 count_writer = malloc(sizeof(*count_writer) * nr_writers);
340
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341 next_aff = 0;
342
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343 for (i = 0; i < nr_readers; i++) {
344 err = pthread_create(&tid_reader[i], NULL, thr_reader,
345 &count_reader[i]);
346 if (err != 0)
347 exit(1);
348 }
349 for (i = 0; i < nr_writers; i++) {
350 err = pthread_create(&tid_writer[i], NULL, thr_writer,
351 &count_writer[i]);
352 if (err != 0)
353 exit(1);
354 }
355
5481ddb3 356 cmm_smp_mb();
10c48e14 357
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358 test_go = 1;
359
360 sleep(duration);
361
362 test_stop = 1;
363
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364 for (i = 0; i < nr_readers; i++) {
365 err = pthread_join(tid_reader[i], &tret);
366 if (err != 0)
367 exit(1);
368 tot_reads += count_reader[i];
369 }
370 for (i = 0; i < nr_writers; i++) {
371 err = pthread_join(tid_writer[i], &tret);
372 if (err != 0)
373 exit(1);
374 tot_writes += count_writer[i];
375 }
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376
377 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 378 tot_writes);
a50a7b43 379 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 380 "nr_writers %3u "
9e31d0f0 381 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 382 argv[0], duration, nr_readers, rduration, wduration,
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383 nr_writers, wdelay, tot_reads, tot_writes,
384 tot_reads + tot_writes);
385
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386 free(tid_reader);
387 free(tid_writer);
388 free(count_reader);
389 free(count_writer);
390 return 0;
391}
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