Cleanup: enable signed/unsigned compare compiler warning
[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
ac260fd9 23#include <stdio.h>
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24#include <pthread.h>
25#include <stdlib.h>
41718ff9 26#include <string.h>
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27#include <sys/types.h>
28#include <sys/wait.h>
29#include <unistd.h>
30#include <stdio.h>
41718ff9 31#include <assert.h>
94b343fd 32#include <errno.h>
87bd15cd 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"
2650042a 38#include <../common/debug-yield.h>
65fcc7e9 39
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40/* hardcoded number of CPUs */
41#define NR_CPUS 16384
42
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43#ifndef DYNAMIC_LINK_TEST
44#define _LGPL_SOURCE
121a5d44 45#endif
ec4e58a3 46#include <urcu.h>
ac260fd9 47
78efb485 48static volatile int test_go, test_stop;
8c86b9a1 49
9e31d0f0 50static unsigned long wdelay;
bb488185 51
bcc74df3 52static int *test_rcu_pointer;
41718ff9 53
cf380c2f 54static unsigned long duration;
cf380c2f 55
daddf5b0 56/* read-side C.S. duration, in loops */
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57static unsigned long rduration;
58
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59/* write-side C.S. duration, in loops */
60static unsigned long wduration;
61
ab0aacbe 62static inline void loop_sleep(unsigned long loops)
daddf5b0 63{
ab0aacbe 64 while (loops-- != 0)
06f22bdb 65 caa_cpu_relax();
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66}
67
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68static int verbose_mode;
69
70#define printf_verbose(fmt, args...) \
71 do { \
72 if (verbose_mode) \
73 printf(fmt, args); \
74 } while (0)
75
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76static unsigned int cpu_affinities[NR_CPUS];
77static unsigned int next_aff = 0;
78static int use_affinity = 0;
79
80pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
81
82static void set_affinity(void)
83{
95bc7fb9 84#if HAVE_SCHED_SETAFFINITY
2a7ac59d 85 cpu_set_t mask;
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86 int cpu, ret;
87#endif /* HAVE_SCHED_SETAFFINITY */
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88
89 if (!use_affinity)
90 return;
91
d8540fc5 92#if HAVE_SCHED_SETAFFINITY
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93 ret = pthread_mutex_lock(&affinity_mutex);
94 if (ret) {
95 perror("Error in pthread mutex lock");
96 exit(-1);
97 }
98 cpu = cpu_affinities[next_aff++];
99 ret = pthread_mutex_unlock(&affinity_mutex);
100 if (ret) {
101 perror("Error in pthread mutex unlock");
102 exit(-1);
103 }
d8540fc5 104
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105 CPU_ZERO(&mask);
106 CPU_SET(cpu, &mask);
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107#if SCHED_SETAFFINITY_ARGS == 2
108 sched_setaffinity(0, &mask);
109#else
2a7ac59d 110 sched_setaffinity(0, sizeof(mask), &mask);
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111#endif
112#endif /* HAVE_SCHED_SETAFFINITY */
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113}
114
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115/*
116 * returns 0 if test should end.
117 */
5873cd17 118static int test_duration_write(void)
cf380c2f 119{
78efb485 120 return !test_stop;
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121}
122
123static int test_duration_read(void)
124{
78efb485 125 return !test_stop;
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126}
127
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128static DEFINE_URCU_TLS(unsigned long long, nr_writes);
129static DEFINE_URCU_TLS(unsigned long long, nr_reads);
1eec319e 130
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131static unsigned int nr_readers;
132static unsigned int nr_writers;
133
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134pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
135
136void rcu_copy_mutex_lock(void)
137{
138 int ret;
139 ret = pthread_mutex_lock(&rcu_copy_mutex);
140 if (ret) {
141 perror("Error in pthread mutex lock");
142 exit(-1);
143 }
144}
145
146void rcu_copy_mutex_unlock(void)
147{
148 int ret;
149
150 ret = pthread_mutex_unlock(&rcu_copy_mutex);
151 if (ret) {
152 perror("Error in pthread mutex unlock");
153 exit(-1);
154 }
155}
f69f195a 156
1eec319e 157void *thr_reader(void *_count)
f69f195a 158{
1eec319e 159 unsigned long long *count = _count;
bcc74df3 160 int *local_ptr;
41718ff9 161
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162 printf_verbose("thread_begin %s, tid %lu\n",
163 "reader", urcu_get_thread_id());
f69f195a 164
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165 set_affinity();
166
121a5d44 167 rcu_register_thread();
882f3357 168 assert(!rcu_read_ongoing());
f69f195a 169
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170 while (!test_go)
171 {
172 }
5481ddb3 173 cmm_smp_mb();
8c86b9a1 174
cf380c2f 175 for (;;) {
1430ee0b 176 rcu_read_lock();
882f3357 177 assert(rcu_read_ongoing());
cf380c2f 178 local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b 179 rcu_debug_yield_read();
cf380c2f 180 if (local_ptr)
bcc74df3 181 assert(*local_ptr == 8);
a0b7f7ea 182 if (caa_unlikely(rduration))
daddf5b0 183 loop_sleep(rduration);
1430ee0b 184 rcu_read_unlock();
bd252a04 185 URCU_TLS(nr_reads)++;
a0b7f7ea 186 if (caa_unlikely(!test_duration_read()))
cf380c2f 187 break;
41718ff9 188 }
f69f195a 189
121a5d44 190 rcu_unregister_thread();
41718ff9 191
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192 /* test extra thread registration */
193 rcu_register_thread();
194 rcu_unregister_thread();
195
bd252a04 196 *count = URCU_TLS(nr_reads);
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197 printf_verbose("thread_end %s, tid %lu\n",
198 "reader", urcu_get_thread_id());
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199 return ((void*)1);
200
201}
202
1eec319e 203void *thr_writer(void *_count)
f69f195a 204{
1eec319e 205 unsigned long long *count = _count;
bcc74df3 206 int *new, *old;
f69f195a 207
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208 printf_verbose("thread_begin %s, tid %lu\n",
209 "writer", urcu_get_thread_id());
f69f195a 210
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211 set_affinity();
212
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213 while (!test_go)
214 {
215 }
5481ddb3 216 cmm_smp_mb();
8c86b9a1 217
cf380c2f 218 for (;;) {
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219 new = malloc(sizeof(int));
220 assert(new);
221 *new = 8;
d2835e6f 222 old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea 223 if (caa_unlikely(wduration))
31b598e0 224 loop_sleep(wduration);
d2835e6f 225 synchronize_rcu();
cf380c2f 226 if (old)
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227 *old = 0;
228 free(old);
bd252a04 229 URCU_TLS(nr_writes)++;
a0b7f7ea 230 if (caa_unlikely(!test_duration_write()))
cf380c2f 231 break;
a0b7f7ea 232 if (caa_unlikely(wdelay))
9e31d0f0 233 loop_sleep(wdelay);
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234 }
235
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236 printf_verbose("thread_end %s, tid %lu\n",
237 "writer", urcu_get_thread_id());
bd252a04 238 *count = URCU_TLS(nr_writes);
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239 return ((void*)2);
240}
ac260fd9 241
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242void show_usage(int argc, char **argv)
243{
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244 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
245 argv[0]);
246 printf("OPTIONS:\n");
06637138 247 printf(" [-r] [-w] (yield reader and/or writer)\n");
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248 printf(" [-d delay] (writer period (us))\n");
249 printf(" [-c duration] (reader C.S. duration (in loops))\n");
250 printf(" [-e duration] (writer C.S. duration (in loops))\n");
251 printf(" [-v] (verbose output)\n");
252 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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253 printf("\n");
254}
255
cf380c2f 256int main(int argc, char **argv)
ac260fd9 257{
f69f195a 258 int err;
8c86b9a1 259 pthread_t *tid_reader, *tid_writer;
f69f195a 260 void *tret;
8c86b9a1 261 unsigned long long *count_reader, *count_writer;
1eec319e 262 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 263 int i, a;
83e334d0 264 unsigned int i_thr;
f69f195a 265
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266 if (argc < 4) {
267 show_usage(argc, argv);
268 return -1;
269 }
270
271 err = sscanf(argv[1], "%u", &nr_readers);
272 if (err != 1) {
1430ee0b 273 show_usage(argc, argv);
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274 return -1;
275 }
276
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277 err = sscanf(argv[2], "%u", &nr_writers);
278 if (err != 1) {
279 show_usage(argc, argv);
280 return -1;
281 }
83e334d0 282
8c86b9a1 283 err = sscanf(argv[3], "%lu", &duration);
cf380c2f 284 if (err != 1) {
1430ee0b 285 show_usage(argc, argv);
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286 return -1;
287 }
288
8c86b9a1 289 for (i = 4; i < argc; i++) {
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290 if (argv[i][0] != '-')
291 continue;
292 switch (argv[i][1]) {
293 case 'r':
2650042a 294 rcu_debug_yield_enable(RCU_YIELD_READ);
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295 break;
296 case 'w':
2650042a 297 rcu_debug_yield_enable(RCU_YIELD_WRITE);
cf380c2f 298 break;
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299 case 'a':
300 if (argc < i + 2) {
301 show_usage(argc, argv);
302 return -1;
303 }
304 a = atoi(argv[++i]);
2a7ac59d 305 cpu_affinities[next_aff++] = a;
9e97e478 306 use_affinity = 1;
4bad7d45 307 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 308 break;
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309 case 'c':
310 if (argc < i + 2) {
311 show_usage(argc, argv);
312 return -1;
313 }
9e31d0f0 314 rduration = atol(argv[++i]);
8b632bab 315 break;
8c86b9a1 316 case 'd':
7685d963 317 if (argc < i + 2) {
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318 show_usage(argc, argv);
319 return -1;
320 }
9e31d0f0 321 wdelay = atol(argv[++i]);
bb488185 322 break;
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323 case 'e':
324 if (argc < i + 2) {
325 show_usage(argc, argv);
326 return -1;
327 }
328 wduration = atol(argv[++i]);
329 break;
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330 case 'v':
331 verbose_mode = 1;
332 break;
cf380c2f
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333 }
334 }
cf380c2f 335
4bad7d45 336 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
8c86b9a1 337 duration, nr_readers, nr_writers);
9e31d0f0 338 printf_verbose("Writer delay : %lu loops.\n", wdelay);
4bad7d45 339 printf_verbose("Reader duration : %lu loops.\n", rduration);
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340 printf_verbose("thread %-6s, tid %lu\n",
341 "main", urcu_get_thread_id());
87bd15cd 342
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343 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
344 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
345 count_reader = calloc(nr_readers, sizeof(*count_reader));
346 count_writer = calloc(nr_writers, sizeof(*count_writer));
8c86b9a1 347
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348 next_aff = 0;
349
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350 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
351 err = pthread_create(&tid_reader[i_thr], NULL, thr_reader,
352 &count_reader[i_thr]);
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353 if (err != 0)
354 exit(1);
355 }
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356 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
357 err = pthread_create(&tid_writer[i_thr], NULL, thr_writer,
358 &count_writer[i_thr]);
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359 if (err != 0)
360 exit(1);
361 }
362
5481ddb3 363 cmm_smp_mb();
8c86b9a1 364
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365 test_go = 1;
366
367 sleep(duration);
368
369 test_stop = 1;
370
83e334d0
MJ
371 for (i_thr = 0; i_thr < nr_readers; i_thr++) {
372 err = pthread_join(tid_reader[i_thr], &tret);
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373 if (err != 0)
374 exit(1);
83e334d0 375 tot_reads += count_reader[i_thr];
f69f195a 376 }
83e334d0
MJ
377 for (i_thr = 0; i_thr < nr_writers; i_thr++) {
378 err = pthread_join(tid_writer[i_thr], &tret);
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379 if (err != 0)
380 exit(1);
83e334d0 381 tot_writes += count_writer[i_thr];
f69f195a 382 }
83e334d0 383
4bad7d45 384 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
1eec319e 385 tot_writes);
a50a7b43 386 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 387 "nr_writers %3u "
9e31d0f0 388 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 389 argv[0], duration, nr_readers, rduration, wduration,
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390 nr_writers, wdelay, tot_reads, tot_writes,
391 tot_reads + tot_writes);
bcc74df3 392 free(test_rcu_pointer);
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393 free(tid_reader);
394 free(tid_writer);
395 free(count_reader);
396 free(count_writer);
f69f195a 397 return 0;
ac260fd9 398}
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