Cleanup: enable signed/unsigned compare compiler warning
[urcu.git] / tests / benchmark / 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
23#include <stdio.h>
24#include <pthread.h>
25#include <stdlib.h>
26#include <string.h>
27#include <sys/types.h>
28#include <sys/wait.h>
29#include <unistd.h>
30#include <stdio.h>
31#include <assert.h>
94b343fd 32#include <errno.h>
10c48e14 33
ec4e58a3 34#include <urcu/arch.h>
bd252a04 35#include <urcu/tls-compat.h>
2953b501 36#include "cpuset.h"
94df6318 37#include "thread-id.h"
65fcc7e9 38
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39/* hardcoded number of CPUs */
40#define NR_CPUS 16384
41
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42#ifndef DYNAMIC_LINK_TEST
43#define _LGPL_SOURCE
10c48e14 44#endif
ec4e58a3 45#include <urcu.h>
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46
47struct test_array {
48 int a;
49};
50
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51/*
52 * static rwlock initializer is broken on Cygwin. Use runtime
53 * initialization.
54 */
55pthread_rwlock_t lock;
10c48e14 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 (;;) {
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180 int a, ret;
181
182 ret = pthread_rwlock_rdlock(&lock);
183 if (ret) {
184 fprintf(stderr, "reader pthread_rwlock_rdlock: %s\n", strerror(ret));
185 abort();
186 }
efa8d2c8 187
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188 a = test_array.a;
189 assert(a == 8);
a0b7f7ea 190 if (caa_unlikely(rduration))
daddf5b0 191 loop_sleep(rduration);
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192
193 ret = pthread_rwlock_unlock(&lock);
194 if (ret) {
195 fprintf(stderr, "reader pthread_rwlock_unlock: %s\n", strerror(ret));
196 abort();
197 }
198
bd252a04 199 URCU_TLS(nr_reads)++;
a0b7f7ea 200 if (caa_unlikely(!test_duration_read()))
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201 break;
202 }
203
bd252a04 204 *count = URCU_TLS(nr_reads);
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205
206 printf_verbose("thread_end %s, tid %lu, count %llu\n",
207 "reader", urcu_get_thread_id(), *count);
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208 return ((void*)1);
209
210}
211
212void *thr_writer(void *_count)
213{
214 unsigned long long *count = _count;
215
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216 printf_verbose("thread_begin %s, tid %lu\n",
217 "writer", urcu_get_thread_id());
10c48e14 218
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219 set_affinity();
220
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221 while (!test_go)
222 {
223 }
5481ddb3 224 cmm_smp_mb();
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225
226 for (;;) {
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227 int ret;
228
229 ret = pthread_rwlock_wrlock(&lock);
230 if (ret) {
231 fprintf(stderr, "writer pthread_rwlock_wrlock: %s\n", strerror(ret));
232 abort();
233 }
234
2b4e4125 235 test_array.a = 0;
10c48e14 236 test_array.a = 8;
a0b7f7ea 237 if (caa_unlikely(wduration))
31b598e0 238 loop_sleep(wduration);
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239
240 ret = pthread_rwlock_unlock(&lock);
241 if (ret) {
242 fprintf(stderr, "writer pthread_rwlock_unlock: %s\n", strerror(ret));
243 abort();
244 }
245
bd252a04 246 URCU_TLS(nr_writes)++;
a0b7f7ea 247 if (caa_unlikely(!test_duration_write()))
10c48e14 248 break;
a0b7f7ea 249 if (caa_unlikely(wdelay))
9e31d0f0 250 loop_sleep(wdelay);
10c48e14 251 }
bd252a04 252 *count = URCU_TLS(nr_writes);
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253
254 printf_verbose("thread_end %s, tid %lu, count %llu\n",
255 "writer", urcu_get_thread_id(), *count);
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256 return ((void*)2);
257}
258
259void show_usage(int argc, char **argv)
260{
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261 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
262 argv[0]);
263 printf("OPTIONS:\n");
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264 printf(" [-d delay] (writer period (us))\n");
265 printf(" [-c duration] (reader C.S. duration (in loops))\n");
266 printf(" [-e duration] (writer C.S. duration (in loops))\n");
267 printf(" [-v] (verbose output)\n");
268 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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269 printf("\n");
270}
271
272int main(int argc, char **argv)
273{
274 int err;
275 pthread_t *tid_reader, *tid_writer;
276 void *tret;
277 unsigned long long *count_reader, *count_writer;
278 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 279 int i, a;
83e334d0 280 unsigned int i_thr;
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281
282 if (argc < 4) {
283 show_usage(argc, argv);
284 return -1;
285 }
5481ddb3 286 cmm_smp_mb();
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287
288 err = sscanf(argv[1], "%u", &nr_readers);
289 if (err != 1) {
290 show_usage(argc, argv);
291 return -1;
292 }
293
294 err = sscanf(argv[2], "%u", &nr_writers);
295 if (err != 1) {
296 show_usage(argc, argv);
297 return -1;
298 }
299
300 err = sscanf(argv[3], "%lu", &duration);
301 if (err != 1) {
302 show_usage(argc, argv);
303 return -1;
304 }
305
306 for (i = 4; i < argc; i++) {
307 if (argv[i][0] != '-')
308 continue;
309 switch (argv[i][1]) {
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310 case 'a':
311 if (argc < i + 2) {
312 show_usage(argc, argv);
313 return -1;
314 }
315 a = atoi(argv[++i]);
2a7ac59d 316 cpu_affinities[next_aff++] = a;
9e97e478 317 use_affinity = 1;
4bad7d45 318 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 319 break;
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320 case 'c':
321 if (argc < i + 2) {
322 show_usage(argc, argv);
323 return -1;
324 }
9e31d0f0 325 rduration = atol(argv[++i]);
8b632bab 326 break;
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327 case 'd':
328 if (argc < i + 2) {
329 show_usage(argc, argv);
330 return -1;
331 }
9e31d0f0 332 wdelay = atol(argv[++i]);
10c48e14 333 break;
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334 case 'e':
335 if (argc < i + 2) {
336 show_usage(argc, argv);
337 return -1;
338 }
339 wduration = atol(argv[++i]);
340 break;
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341 case 'v':
342 verbose_mode = 1;
343 break;
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344 }
345 }
346
4bad7d45 347 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 348 duration, nr_readers, nr_writers);
9e31d0f0 349 printf_verbose("Writer delay : %lu loops.\n", wdelay);
aae4fe1d 350 printf_verbose("Writer duration : %lu loops.\n", wduration);
4bad7d45 351 printf_verbose("Reader duration : %lu loops.\n", rduration);
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352 printf_verbose("thread %-6s, tid %lu\n",
353 "main", urcu_get_thread_id());
10c48e14 354
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355 err = pthread_rwlock_init(&lock, NULL);
356 if (err != 0) {
357 fprintf(stderr, "pthread_rwlock_init: (%d) %s\n", err, strerror(err));
358 exit(1);
359 }
360
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361 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
362 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
363 count_reader = calloc(nr_readers, sizeof(*count_reader));
364 count_writer = calloc(nr_writers, sizeof(*count_writer));
10c48e14 365
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366 next_aff = 0;
367
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368 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
369 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
370 &count_reader[i_thr]);
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371 if (err != 0)
372 exit(1);
373 }
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374 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
375 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
376 &count_writer[i_thr]);
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377 if (err != 0)
378 exit(1);
379 }
380
5481ddb3 381 cmm_smp_mb();
10c48e14 382
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383 test_go = 1;
384
385 sleep(duration);
386
387 test_stop = 1;
388
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389 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
390 err = pthread_join(tid_reader[i_thr], &tret);
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391 if (err != 0)
392 exit(1);
83e334d0 393 tot_reads += count_reader[i_thr];
10c48e14 394 }
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395 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
396 err = pthread_join(tid_writer[i_thr], &tret);
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397 if (err != 0)
398 exit(1);
83e334d0 399 tot_writes += count_writer[i_thr];
10c48e14 400 }
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401
402 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 403 tot_writes);
a50a7b43 404 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 405 "nr_writers %3u "
9e31d0f0 406 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 407 argv[0], duration, nr_readers, rduration, wduration,
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408 nr_writers, wdelay, tot_reads, tot_writes,
409 tot_reads + tot_writes);
410
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411 err = pthread_rwlock_destroy(&lock);
412 if (err != 0) {
413 fprintf(stderr, "pthread_rwlock_destroy: (%d) %s\n", err, strerror(err));
414 exit(1);
415 }
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416 free(tid_reader);
417 free(tid_writer);
418 free(count_reader);
419 free(count_writer);
420 return 0;
421}
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