Cleanup: enable signed/unsigned compare compiler warning
[urcu.git] / tests / benchmark / test_mutex.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
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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>
51299083 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
51299083 44#endif
ec4e58a3 45#include <urcu.h>
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46
47struct test_array {
48 int a;
49};
50
f61dfd97 51static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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52
53static volatile int test_go, test_stop;
54
9e31d0f0 55static unsigned long wdelay;
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56
57static volatile struct test_array test_array = { 8 };
58
59static unsigned long duration;
60
daddf5b0 61/* read-side C.S. duration, in loops */
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62static unsigned long rduration;
63
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64/* write-side C.S. duration, in loops */
65static unsigned long wduration;
66
ab0aacbe 67static inline void loop_sleep(unsigned long loops)
daddf5b0 68{
ab0aacbe 69 while (loops-- != 0)
06f22bdb 70 caa_cpu_relax();
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71}
72
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73static int verbose_mode;
74
75#define printf_verbose(fmt, args...) \
76 do { \
77 if (verbose_mode) \
78 printf(fmt, args); \
79 } while (0)
80
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81static unsigned int cpu_affinities[NR_CPUS];
82static unsigned int next_aff = 0;
83static int use_affinity = 0;
84
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85pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
86
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87static void set_affinity(void)
88{
95bc7fb9 89#if HAVE_SCHED_SETAFFINITY
2a7ac59d 90 cpu_set_t mask;
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91 int cpu, ret;
92#endif /* HAVE_SCHED_SETAFFINITY */
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93
94 if (!use_affinity)
95 return;
96
d8540fc5 97#if HAVE_SCHED_SETAFFINITY
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98 ret = pthread_mutex_lock(&affinity_mutex);
99 if (ret) {
100 perror("Error in pthread mutex lock");
101 exit(-1);
102 }
2a7ac59d 103 cpu = cpu_affinities[next_aff++];
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104 ret = pthread_mutex_unlock(&affinity_mutex);
105 if (ret) {
106 perror("Error in pthread mutex unlock");
107 exit(-1);
108 }
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109 CPU_ZERO(&mask);
110 CPU_SET(cpu, &mask);
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111#if SCHED_SETAFFINITY_ARGS == 2
112 sched_setaffinity(0, &mask);
113#else
2a7ac59d 114 sched_setaffinity(0, sizeof(mask), &mask);
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115#endif
116#endif /* HAVE_SCHED_SETAFFINITY */
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117}
118
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119/*
120 * returns 0 if test should end.
121 */
122static int test_duration_write(void)
123{
124 return !test_stop;
125}
126
127static int test_duration_read(void)
128{
129 return !test_stop;
130}
131
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132static DEFINE_URCU_TLS(unsigned long long, nr_writes);
133static DEFINE_URCU_TLS(unsigned long long, nr_reads);
51299083 134
55271c13 135static
06f22bdb 136unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13 137static
06f22bdb 138unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_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 *data)
167{
168 unsigned long tidx = (unsigned long)data;
169
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170 printf_verbose("thread_begin %s, tid %lu\n",
171 "reader", urcu_get_thread_id());
51299083 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 v;
181
51299083 182 pthread_mutex_lock(&lock);
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183 v = test_array.a;
184 assert(v == 8);
a0b7f7ea 185 if (caa_unlikely(rduration))
daddf5b0 186 loop_sleep(rduration);
51299083 187 pthread_mutex_unlock(&lock);
bd252a04 188 URCU_TLS(nr_reads)++;
a0b7f7ea 189 if (caa_unlikely(!test_duration_read()))
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190 break;
191 }
192
bd252a04 193 tot_nr_reads[tidx] = URCU_TLS(nr_reads);
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194 printf_verbose("thread_end %s, tid %lu\n",
195 "reader", urcu_get_thread_id());
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196 return ((void*)1);
197
198}
199
200void *thr_writer(void *data)
201{
202 unsigned long wtidx = (unsigned long)data;
203
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204 printf_verbose("thread_begin %s, tid %lu\n",
205 "writer", urcu_get_thread_id());
51299083 206
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207 set_affinity();
208
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209 while (!test_go)
210 {
211 }
5481ddb3 212 cmm_smp_mb();
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213
214 for (;;) {
215 pthread_mutex_lock(&lock);
216 test_array.a = 0;
217 test_array.a = 8;
a0b7f7ea 218 if (caa_unlikely(wduration))
31b598e0 219 loop_sleep(wduration);
51299083 220 pthread_mutex_unlock(&lock);
bd252a04 221 URCU_TLS(nr_writes)++;
a0b7f7ea 222 if (caa_unlikely(!test_duration_write()))
51299083 223 break;
a0b7f7ea 224 if (caa_unlikely(wdelay))
9e31d0f0 225 loop_sleep(wdelay);
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226 }
227
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228 printf_verbose("thread_end %s, tid %lu\n",
229 "writer", urcu_get_thread_id());
bd252a04 230 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
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231 return ((void*)2);
232}
233
234void show_usage(int argc, char **argv)
235{
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236 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
237 argv[0]);
238 printf("OPTIONS:\n");
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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
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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;
254 int i, a;
83e334d0 255 unsigned int i_thr;
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256
257 if (argc < 4) {
258 show_usage(argc, argv);
259 return -1;
260 }
5481ddb3 261 cmm_smp_mb();
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262
263 err = sscanf(argv[1], "%u", &nr_readers);
264 if (err != 1) {
265 show_usage(argc, argv);
266 return -1;
267 }
268
269 err = sscanf(argv[2], "%u", &nr_writers);
270 if (err != 1) {
271 show_usage(argc, argv);
272 return -1;
273 }
83e334d0 274
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275 err = sscanf(argv[3], "%lu", &duration);
276 if (err != 1) {
277 show_usage(argc, argv);
278 return -1;
279 }
280
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281 for (i = 4; i < argc; i++) {
282 if (argv[i][0] != '-')
283 continue;
284 switch (argv[i][1]) {
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285 case 'a':
286 if (argc < i + 2) {
287 show_usage(argc, argv);
288 return -1;
289 }
290 a = atoi(argv[++i]);
2a7ac59d 291 cpu_affinities[next_aff++] = a;
51299083 292 use_affinity = 1;
4bad7d45 293 printf_verbose("Adding CPU %d affinity\n", a);
51299083 294 break;
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295 case 'c':
296 if (argc < i + 2) {
297 show_usage(argc, argv);
298 return -1;
299 }
9e31d0f0 300 rduration = atol(argv[++i]);
8b632bab 301 break;
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302 case 'd':
303 if (argc < i + 2) {
304 show_usage(argc, argv);
305 return -1;
306 }
9e31d0f0 307 wdelay = atol(argv[++i]);
51299083 308 break;
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309 case 'e':
310 if (argc < i + 2) {
311 show_usage(argc, argv);
312 return -1;
313 }
314 wduration = atol(argv[++i]);
315 break;
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316 case 'v':
317 verbose_mode = 1;
318 break;
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319 }
320 }
321
4bad7d45 322 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
51299083 323 duration, nr_readers, nr_writers);
9e31d0f0 324 printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 325 printf_verbose("Reader duration : %lu loops.\n", rduration);
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326 printf_verbose("thread %-6s, tid %lu\n",
327 "main", urcu_get_thread_id());
51299083 328
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329 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
330 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
331 count_reader = calloc(nr_readers, sizeof(*count_reader));
332 count_writer = calloc(nr_writers, sizeof(*count_writer));
333 tot_nr_reads = calloc(nr_readers, sizeof(*tot_nr_reads));
334 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
51299083 335
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336 next_aff = 0;
337
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338 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
339 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
340 (void *)(long)i_thr);
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341 if (err != 0)
342 exit(1);
343 }
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344 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
345 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
346 (void *)(long)i_thr);
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347 if (err != 0)
348 exit(1);
349 }
350
5481ddb3 351 cmm_smp_mb();
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352
353 test_go = 1;
354
355 sleep(duration);
356
357 test_stop = 1;
358
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359 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
360 err = pthread_join(tid_reader[i_thr], &tret);
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361 if (err != 0)
362 exit(1);
83e334d0 363 tot_reads += tot_nr_reads[i_thr];
51299083 364 }
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365 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
366 err = pthread_join(tid_writer[i_thr], &tret);
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367 if (err != 0)
368 exit(1);
83e334d0 369 tot_writes += tot_nr_writes[i_thr];
51299083 370 }
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371
372 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
51299083 373 tot_writes);
a50a7b43 374 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 375 "nr_writers %3u "
9e31d0f0 376 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 377 argv[0], duration, nr_readers, rduration, wduration,
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378 nr_writers, wdelay, tot_reads, tot_writes,
379 tot_reads + tot_writes);
380
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381 free(tid_reader);
382 free(tid_writer);
383 free(count_reader);
384 free(count_writer);
385 free(tot_nr_reads);
386 free(tot_nr_writes);
387 return 0;
388}
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