urcu signal tests: use library rather than recompile source
[urcu.git] / tests / benchmark / test_urcu.c
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b257a10b
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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>
b257a10b 7 *
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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.
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21 */
22
9e97e478 23#define _GNU_SOURCE
f5ab766e 24#include "config.h"
ac260fd9 25#include <stdio.h>
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26#include <pthread.h>
27#include <stdlib.h>
41718ff9 28#include <string.h>
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29#include <sys/types.h>
30#include <sys/wait.h>
31#include <unistd.h>
32#include <stdio.h>
41718ff9 33#include <assert.h>
94b343fd 34#include <errno.h>
87bd15cd 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"
2650042a 40#include <../common/debug-yield.h>
65fcc7e9 41
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42/* hardcoded number of CPUs */
43#define NR_CPUS 16384
44
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45#ifndef DYNAMIC_LINK_TEST
46#define _LGPL_SOURCE
121a5d44 47#endif
ec4e58a3 48#include <urcu.h>
ac260fd9 49
78efb485 50static volatile int test_go, test_stop;
8c86b9a1 51
9e31d0f0 52static unsigned long wdelay;
bb488185 53
bcc74df3 54static int *test_rcu_pointer;
41718ff9 55
cf380c2f 56static unsigned long duration;
cf380c2f 57
daddf5b0 58/* read-side C.S. duration, in loops */
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59static unsigned long rduration;
60
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61/* write-side C.S. duration, in loops */
62static unsigned long wduration;
63
ab0aacbe 64static inline void loop_sleep(unsigned long loops)
daddf5b0 65{
ab0aacbe 66 while (loops-- != 0)
06f22bdb 67 caa_cpu_relax();
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68}
69
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70static int verbose_mode;
71
72#define printf_verbose(fmt, args...) \
73 do { \
74 if (verbose_mode) \
75 printf(fmt, args); \
76 } while (0)
77
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78static unsigned int cpu_affinities[NR_CPUS];
79static unsigned int next_aff = 0;
80static int use_affinity = 0;
81
82pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
83
84static void set_affinity(void)
85{
95bc7fb9 86#if HAVE_SCHED_SETAFFINITY
2a7ac59d 87 cpu_set_t mask;
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88 int cpu, ret;
89#endif /* HAVE_SCHED_SETAFFINITY */
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90
91 if (!use_affinity)
92 return;
93
d8540fc5 94#if HAVE_SCHED_SETAFFINITY
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95 ret = pthread_mutex_lock(&affinity_mutex);
96 if (ret) {
97 perror("Error in pthread mutex lock");
98 exit(-1);
99 }
100 cpu = cpu_affinities[next_aff++];
101 ret = pthread_mutex_unlock(&affinity_mutex);
102 if (ret) {
103 perror("Error in pthread mutex unlock");
104 exit(-1);
105 }
d8540fc5 106
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107 CPU_ZERO(&mask);
108 CPU_SET(cpu, &mask);
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109#if SCHED_SETAFFINITY_ARGS == 2
110 sched_setaffinity(0, &mask);
111#else
2a7ac59d 112 sched_setaffinity(0, sizeof(mask), &mask);
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113#endif
114#endif /* HAVE_SCHED_SETAFFINITY */
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115}
116
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117/*
118 * returns 0 if test should end.
119 */
5873cd17 120static int test_duration_write(void)
cf380c2f 121{
78efb485 122 return !test_stop;
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123}
124
125static int test_duration_read(void)
126{
78efb485 127 return !test_stop;
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128}
129
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130static DEFINE_URCU_TLS(unsigned long long, nr_writes);
131static DEFINE_URCU_TLS(unsigned long long, nr_reads);
1eec319e 132
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133static unsigned int nr_readers;
134static unsigned int nr_writers;
135
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136pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
137
138void rcu_copy_mutex_lock(void)
139{
140 int ret;
141 ret = pthread_mutex_lock(&rcu_copy_mutex);
142 if (ret) {
143 perror("Error in pthread mutex lock");
144 exit(-1);
145 }
146}
147
148void rcu_copy_mutex_unlock(void)
149{
150 int ret;
151
152 ret = pthread_mutex_unlock(&rcu_copy_mutex);
153 if (ret) {
154 perror("Error in pthread mutex unlock");
155 exit(-1);
156 }
157}
f69f195a 158
1eec319e 159void *thr_reader(void *_count)
f69f195a 160{
1eec319e 161 unsigned long long *count = _count;
bcc74df3 162 int *local_ptr;
41718ff9 163
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164 printf_verbose("thread_begin %s, tid %lu\n",
165 "reader", urcu_get_thread_id());
f69f195a 166
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167 set_affinity();
168
121a5d44 169 rcu_register_thread();
882f3357 170 assert(!rcu_read_ongoing());
f69f195a 171
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172 while (!test_go)
173 {
174 }
5481ddb3 175 cmm_smp_mb();
8c86b9a1 176
cf380c2f 177 for (;;) {
1430ee0b 178 rcu_read_lock();
882f3357 179 assert(rcu_read_ongoing());
cf380c2f 180 local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b 181 rcu_debug_yield_read();
cf380c2f 182 if (local_ptr)
bcc74df3 183 assert(*local_ptr == 8);
a0b7f7ea 184 if (caa_unlikely(rduration))
daddf5b0 185 loop_sleep(rduration);
1430ee0b 186 rcu_read_unlock();
bd252a04 187 URCU_TLS(nr_reads)++;
a0b7f7ea 188 if (caa_unlikely(!test_duration_read()))
cf380c2f 189 break;
41718ff9 190 }
f69f195a 191
121a5d44 192 rcu_unregister_thread();
41718ff9 193
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194 /* test extra thread registration */
195 rcu_register_thread();
196 rcu_unregister_thread();
197
bd252a04 198 *count = URCU_TLS(nr_reads);
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199 printf_verbose("thread_end %s, tid %lu\n",
200 "reader", urcu_get_thread_id());
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201 return ((void*)1);
202
203}
204
1eec319e 205void *thr_writer(void *_count)
f69f195a 206{
1eec319e 207 unsigned long long *count = _count;
bcc74df3 208 int *new, *old;
f69f195a 209
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210 printf_verbose("thread_begin %s, tid %lu\n",
211 "writer", urcu_get_thread_id());
f69f195a 212
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213 set_affinity();
214
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215 while (!test_go)
216 {
217 }
5481ddb3 218 cmm_smp_mb();
8c86b9a1 219
cf380c2f 220 for (;;) {
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221 new = malloc(sizeof(int));
222 assert(new);
223 *new = 8;
d2835e6f 224 old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea 225 if (caa_unlikely(wduration))
31b598e0 226 loop_sleep(wduration);
d2835e6f 227 synchronize_rcu();
cf380c2f 228 if (old)
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229 *old = 0;
230 free(old);
bd252a04 231 URCU_TLS(nr_writes)++;
a0b7f7ea 232 if (caa_unlikely(!test_duration_write()))
cf380c2f 233 break;
a0b7f7ea 234 if (caa_unlikely(wdelay))
9e31d0f0 235 loop_sleep(wdelay);
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236 }
237
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238 printf_verbose("thread_end %s, tid %lu\n",
239 "writer", urcu_get_thread_id());
bd252a04 240 *count = URCU_TLS(nr_writes);
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241 return ((void*)2);
242}
ac260fd9 243
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244void show_usage(int argc, char **argv)
245{
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246 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
247 argv[0]);
248 printf("OPTIONS:\n");
06637138 249 printf(" [-r] [-w] (yield reader and/or writer)\n");
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250 printf(" [-d delay] (writer period (us))\n");
251 printf(" [-c duration] (reader C.S. duration (in loops))\n");
252 printf(" [-e duration] (writer C.S. duration (in loops))\n");
253 printf(" [-v] (verbose output)\n");
254 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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255 printf("\n");
256}
257
cf380c2f 258int main(int argc, char **argv)
ac260fd9 259{
f69f195a 260 int err;
8c86b9a1 261 pthread_t *tid_reader, *tid_writer;
f69f195a 262 void *tret;
8c86b9a1 263 unsigned long long *count_reader, *count_writer;
1eec319e 264 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 265 int i, a;
f69f195a 266
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267 if (argc < 4) {
268 show_usage(argc, argv);
269 return -1;
270 }
271
272 err = sscanf(argv[1], "%u", &nr_readers);
273 if (err != 1) {
1430ee0b 274 show_usage(argc, argv);
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275 return -1;
276 }
277
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278 err = sscanf(argv[2], "%u", &nr_writers);
279 if (err != 1) {
280 show_usage(argc, argv);
281 return -1;
282 }
283
284 err = sscanf(argv[3], "%lu", &duration);
cf380c2f 285 if (err != 1) {
1430ee0b 286 show_usage(argc, argv);
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287 return -1;
288 }
289
8c86b9a1 290 for (i = 4; i < argc; i++) {
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291 if (argv[i][0] != '-')
292 continue;
293 switch (argv[i][1]) {
294 case 'r':
2650042a 295 rcu_debug_yield_enable(RCU_YIELD_READ);
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296 break;
297 case 'w':
2650042a 298 rcu_debug_yield_enable(RCU_YIELD_WRITE);
cf380c2f 299 break;
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300 case 'a':
301 if (argc < i + 2) {
302 show_usage(argc, argv);
303 return -1;
304 }
305 a = atoi(argv[++i]);
2a7ac59d 306 cpu_affinities[next_aff++] = a;
9e97e478 307 use_affinity = 1;
4bad7d45 308 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 309 break;
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310 case 'c':
311 if (argc < i + 2) {
312 show_usage(argc, argv);
313 return -1;
314 }
9e31d0f0 315 rduration = atol(argv[++i]);
8b632bab 316 break;
8c86b9a1 317 case 'd':
7685d963 318 if (argc < i + 2) {
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319 show_usage(argc, argv);
320 return -1;
321 }
9e31d0f0 322 wdelay = atol(argv[++i]);
bb488185 323 break;
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324 case 'e':
325 if (argc < i + 2) {
326 show_usage(argc, argv);
327 return -1;
328 }
329 wduration = atol(argv[++i]);
330 break;
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331 case 'v':
332 verbose_mode = 1;
333 break;
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334 }
335 }
cf380c2f 336
4bad7d45 337 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
8c86b9a1 338 duration, nr_readers, nr_writers);
9e31d0f0 339 printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 340 printf_verbose("Reader duration : %lu loops.\n", rduration);
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341 printf_verbose("thread %-6s, tid %lu\n",
342 "main", urcu_get_thread_id());
87bd15cd 343
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344 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
345 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
346 count_reader = calloc(nr_readers, sizeof(*count_reader));
347 count_writer = calloc(nr_writers, sizeof(*count_writer));
8c86b9a1 348
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349 next_aff = 0;
350
8c86b9a1 351 for (i = 0; i < nr_readers; i++) {
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352 err = pthread_create(&tid_reader[i], NULL, thr_reader,
353 &count_reader[i]);
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354 if (err != 0)
355 exit(1);
356 }
8c86b9a1 357 for (i = 0; i < nr_writers; i++) {
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358 err = pthread_create(&tid_writer[i], NULL, thr_writer,
359 &count_writer[i]);
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360 if (err != 0)
361 exit(1);
362 }
363
5481ddb3 364 cmm_smp_mb();
8c86b9a1 365
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366 test_go = 1;
367
368 sleep(duration);
369
370 test_stop = 1;
371
8c86b9a1 372 for (i = 0; i < nr_readers; i++) {
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373 err = pthread_join(tid_reader[i], &tret);
374 if (err != 0)
375 exit(1);
1eec319e 376 tot_reads += count_reader[i];
f69f195a 377 }
8c86b9a1 378 for (i = 0; i < nr_writers; i++) {
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379 err = pthread_join(tid_writer[i], &tret);
380 if (err != 0)
381 exit(1);
1eec319e 382 tot_writes += count_writer[i];
f69f195a 383 }
5873cd17 384
4bad7d45 385 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
1eec319e 386 tot_writes);
a50a7b43 387 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 388 "nr_writers %3u "
9e31d0f0 389 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 390 argv[0], duration, nr_readers, rduration, wduration,
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391 nr_writers, wdelay, tot_reads, tot_writes,
392 tot_reads + tot_writes);
bcc74df3 393 free(test_rcu_pointer);
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394 free(tid_reader);
395 free(tid_writer);
396 free(count_reader);
397 free(count_writer);
f69f195a 398 return 0;
ac260fd9 399}
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