urcu signal tests: use library rather than recompile source
[urcu.git] / tests / benchmark / test_urcu_bp.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#define _GNU_SOURCE
f5ab766e 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>
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35
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
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47#endif
48#include <urcu-bp.h>
49
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50static volatile int test_go, test_stop;
51
52static unsigned long wdelay;
53
bcc74df3 54static int *test_rcu_pointer;
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55
56static unsigned long duration;
57
58/* read-side C.S. duration, in loops */
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)
fdee2e6d 65{
ab0aacbe 66 while (loops-- != 0)
06f22bdb 67 caa_cpu_relax();
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68}
69
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
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
fdee2e6d 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
fdee2e6d 112 sched_setaffinity(0, sizeof(mask), &mask);
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113#endif
114#endif /* HAVE_SCHED_SETAFFINITY */
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115}
116
117/*
118 * returns 0 if test should end.
119 */
120static int test_duration_write(void)
121{
122 return !test_stop;
123}
124
125static int test_duration_read(void)
126{
127 return !test_stop;
128}
129
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130static DEFINE_URCU_TLS(unsigned long long, nr_writes);
131static DEFINE_URCU_TLS(unsigned long long, nr_reads);
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132
133static unsigned int nr_readers;
134static unsigned int nr_writers;
135
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}
158
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159void *thr_reader(void *_count)
160{
161 unsigned long long *count = _count;
bcc74df3 162 int *local_ptr;
fdee2e6d 163
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164 printf_verbose("thread_begin %s, tid %lu\n",
165 "reader", urcu_get_thread_id());
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166
167 set_affinity();
168
169 rcu_register_thread();
882f3357 170 assert(!rcu_read_ongoing());
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171
172 while (!test_go)
173 {
174 }
5481ddb3 175 cmm_smp_mb();
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176
177 for (;;) {
178 rcu_read_lock();
882f3357 179 assert(rcu_read_ongoing());
fdee2e6d 180 local_ptr = rcu_dereference(test_rcu_pointer);
1de4df4b 181 rcu_debug_yield_read();
fdee2e6d 182 if (local_ptr)
bcc74df3 183 assert(*local_ptr == 8);
a0b7f7ea 184 if (caa_unlikely(rduration))
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185 loop_sleep(rduration);
186 rcu_read_unlock();
bd252a04 187 URCU_TLS(nr_reads)++;
a0b7f7ea 188 if (caa_unlikely(!test_duration_read()))
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189 break;
190 }
191
192 rcu_unregister_thread();
193
bd252a04 194 *count = URCU_TLS(nr_reads);
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195 printf_verbose("thread_end %s, tid %lu\n",
196 "reader", urcu_get_thread_id());
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197 return ((void*)1);
198
199}
200
201void *thr_writer(void *_count)
202{
203 unsigned long long *count = _count;
bcc74df3 204 int *new, *old;
fdee2e6d 205
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206 printf_verbose("thread_begin %s, tid %lu\n",
207 "writer", urcu_get_thread_id());
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208
209 set_affinity();
210
211 while (!test_go)
212 {
213 }
5481ddb3 214 cmm_smp_mb();
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215
216 for (;;) {
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217 new = malloc(sizeof(int));
218 *new = 8;
d2835e6f 219 old = rcu_xchg_pointer(&test_rcu_pointer, new);
a0b7f7ea 220 if (caa_unlikely(wduration))
31b598e0 221 loop_sleep(wduration);
d2835e6f 222 synchronize_rcu();
fdee2e6d 223 if (old)
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224 *old = 0;
225 free(old);
bd252a04 226 URCU_TLS(nr_writes)++;
a0b7f7ea 227 if (caa_unlikely(!test_duration_write()))
fdee2e6d 228 break;
a0b7f7ea 229 if (caa_unlikely(wdelay))
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230 loop_sleep(wdelay);
231 }
232
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233 printf_verbose("thread_end %s, tid %lu\n",
234 "writer", urcu_get_thread_id());
bd252a04 235 *count = URCU_TLS(nr_writes);
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236 return ((void*)2);
237}
238
239void show_usage(int argc, char **argv)
240{
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241 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
242 argv[0]);
243 printf("OPTIONS:\n");
06637138 244 printf(" [-r] [-w] (yield reader and/or writer)\n");
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245 printf(" [-d delay] (writer period (us))\n");
246 printf(" [-c duration] (reader C.S. duration (in loops))\n");
247 printf(" [-e duration] (writer C.S. duration (in loops))\n");
248 printf(" [-v] (verbose output)\n");
249 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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250 printf("\n");
251}
252
253int main(int argc, char **argv)
254{
255 int err;
256 pthread_t *tid_reader, *tid_writer;
257 void *tret;
258 unsigned long long *count_reader, *count_writer;
259 unsigned long long tot_reads = 0, tot_writes = 0;
260 int i, a;
261
262 if (argc < 4) {
263 show_usage(argc, argv);
264 return -1;
265 }
266
267 err = sscanf(argv[1], "%u", &nr_readers);
268 if (err != 1) {
269 show_usage(argc, argv);
270 return -1;
271 }
272
273 err = sscanf(argv[2], "%u", &nr_writers);
274 if (err != 1) {
275 show_usage(argc, argv);
276 return -1;
277 }
278
279 err = sscanf(argv[3], "%lu", &duration);
280 if (err != 1) {
281 show_usage(argc, argv);
282 return -1;
283 }
284
285 for (i = 4; i < argc; i++) {
286 if (argv[i][0] != '-')
287 continue;
288 switch (argv[i][1]) {
fdee2e6d 289 case 'r':
2650042a 290 rcu_debug_yield_enable(RCU_YIELD_READ);
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291 break;
292 case 'w':
2650042a 293 rcu_debug_yield_enable(RCU_YIELD_WRITE);
fdee2e6d 294 break;
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295 case 'a':
296 if (argc < i + 2) {
297 show_usage(argc, argv);
298 return -1;
299 }
300 a = atoi(argv[++i]);
301 cpu_affinities[next_aff++] = a;
302 use_affinity = 1;
303 printf_verbose("Adding CPU %d affinity\n", a);
304 break;
305 case 'c':
306 if (argc < i + 2) {
307 show_usage(argc, argv);
308 return -1;
309 }
310 rduration = atol(argv[++i]);
311 break;
312 case 'd':
313 if (argc < i + 2) {
314 show_usage(argc, argv);
315 return -1;
316 }
317 wdelay = atol(argv[++i]);
318 break;
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319 case 'e':
320 if (argc < i + 2) {
321 show_usage(argc, argv);
322 return -1;
323 }
324 wduration = atol(argv[++i]);
325 break;
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326 case 'v':
327 verbose_mode = 1;
328 break;
329 }
330 }
331
332 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
333 duration, nr_readers, nr_writers);
334 printf_verbose("Writer delay : %lu loops.\n", wdelay);
335 printf_verbose("Reader duration : %lu loops.\n", rduration);
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336 printf_verbose("thread %-6s, tid %lu\n",
337 "main", urcu_get_thread_id());
fdee2e6d 338
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339 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
340 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
341 count_reader = calloc(nr_readers, sizeof(*count_reader));
342 count_writer = calloc(nr_writers, sizeof(*count_writer));
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343
344 next_aff = 0;
345
346 for (i = 0; i < nr_readers; i++) {
347 err = pthread_create(&tid_reader[i], NULL, thr_reader,
348 &count_reader[i]);
349 if (err != 0)
350 exit(1);
351 }
352 for (i = 0; i < nr_writers; i++) {
353 err = pthread_create(&tid_writer[i], NULL, thr_writer,
354 &count_writer[i]);
355 if (err != 0)
356 exit(1);
357 }
358
5481ddb3 359 cmm_smp_mb();
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360
361 test_go = 1;
362
363 sleep(duration);
364
365 test_stop = 1;
366
367 for (i = 0; i < nr_readers; i++) {
368 err = pthread_join(tid_reader[i], &tret);
369 if (err != 0)
370 exit(1);
371 tot_reads += count_reader[i];
372 }
373 for (i = 0; i < nr_writers; i++) {
374 err = pthread_join(tid_writer[i], &tret);
375 if (err != 0)
376 exit(1);
377 tot_writes += count_writer[i];
378 }
379
380 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
381 tot_writes);
a50a7b43 382 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
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383 "nr_writers %3u "
384 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 385 argv[0], duration, nr_readers, rduration, wduration,
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386 nr_writers, wdelay, tot_reads, tot_writes,
387 tot_reads + tot_writes);
bcc74df3 388 free(test_rcu_pointer);
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389 free(tid_reader);
390 free(tid_writer);
391 free(count_reader);
392 free(count_writer);
393 return 0;
394}
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