Fix: volatile in assert()
[urcu.git] / tests / benchmark / test_rwlock.c
1 /*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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
24 #include "config.h"
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>
34 #include <errno.h>
35
36 #include <urcu/arch.h>
37 #include <urcu/tls-compat.h>
38 #include "cpuset.h"
39 #include "thread-id.h"
40
41 /* hardcoded number of CPUs */
42 #define NR_CPUS 16384
43
44 #ifndef DYNAMIC_LINK_TEST
45 #define _LGPL_SOURCE
46 #endif
47 #include <urcu.h>
48
49 struct test_array {
50 int a;
51 };
52
53 pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
54
55 static volatile int test_go, test_stop;
56
57 static unsigned long wdelay;
58
59 static volatile struct test_array test_array = { 8 };
60
61 static unsigned long duration;
62
63 /* read-side C.S. duration, in loops */
64 static unsigned long rduration;
65
66 /* write-side C.S. duration, in loops */
67 static unsigned long wduration;
68
69 static inline void loop_sleep(unsigned long loops)
70 {
71 while (loops-- != 0)
72 caa_cpu_relax();
73 }
74
75 static int verbose_mode;
76
77 #define printf_verbose(fmt, args...) \
78 do { \
79 if (verbose_mode) \
80 printf(fmt, args); \
81 } while (0)
82
83 static unsigned int cpu_affinities[NR_CPUS];
84 static unsigned int next_aff = 0;
85 static int use_affinity = 0;
86
87 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
88
89 static void set_affinity(void)
90 {
91 #if HAVE_SCHED_SETAFFINITY
92 cpu_set_t mask;
93 int cpu, ret;
94 #endif /* HAVE_SCHED_SETAFFINITY */
95
96 if (!use_affinity)
97 return;
98
99 #if HAVE_SCHED_SETAFFINITY
100 ret = pthread_mutex_lock(&affinity_mutex);
101 if (ret) {
102 perror("Error in pthread mutex lock");
103 exit(-1);
104 }
105 cpu = cpu_affinities[next_aff++];
106 ret = pthread_mutex_unlock(&affinity_mutex);
107 if (ret) {
108 perror("Error in pthread mutex unlock");
109 exit(-1);
110 }
111
112 CPU_ZERO(&mask);
113 CPU_SET(cpu, &mask);
114 #if SCHED_SETAFFINITY_ARGS == 2
115 sched_setaffinity(0, &mask);
116 #else
117 sched_setaffinity(0, sizeof(mask), &mask);
118 #endif
119 #endif /* HAVE_SCHED_SETAFFINITY */
120 }
121
122 /*
123 * returns 0 if test should end.
124 */
125 static int test_duration_write(void)
126 {
127 return !test_stop;
128 }
129
130 static int test_duration_read(void)
131 {
132 return !test_stop;
133 }
134
135 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
136 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
137
138 static unsigned int nr_readers;
139 static unsigned int nr_writers;
140
141 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
142
143 void rcu_copy_mutex_lock(void)
144 {
145 int ret;
146 ret = pthread_mutex_lock(&rcu_copy_mutex);
147 if (ret) {
148 perror("Error in pthread mutex lock");
149 exit(-1);
150 }
151 }
152
153 void rcu_copy_mutex_unlock(void)
154 {
155 int ret;
156
157 ret = pthread_mutex_unlock(&rcu_copy_mutex);
158 if (ret) {
159 perror("Error in pthread mutex unlock");
160 exit(-1);
161 }
162 }
163
164 void *thr_reader(void *_count)
165 {
166 unsigned long long *count = _count;
167
168 printf_verbose("thread_begin %s, tid %lu\n",
169 "reader", urcu_get_thread_id());
170
171 set_affinity();
172
173 while (!test_go)
174 {
175 }
176
177 for (;;) {
178 int a;
179
180 pthread_rwlock_rdlock(&lock);
181 a = test_array.a;
182 assert(a == 8);
183 if (caa_unlikely(rduration))
184 loop_sleep(rduration);
185 pthread_rwlock_unlock(&lock);
186 URCU_TLS(nr_reads)++;
187 if (caa_unlikely(!test_duration_read()))
188 break;
189 }
190
191 *count = URCU_TLS(nr_reads);
192 printf_verbose("thread_end %s, tid %lu\n",
193 "reader", urcu_get_thread_id());
194 return ((void*)1);
195
196 }
197
198 void *thr_writer(void *_count)
199 {
200 unsigned long long *count = _count;
201
202 printf_verbose("thread_begin %s, tid %lu\n",
203 "writer", urcu_get_thread_id());
204
205 set_affinity();
206
207 while (!test_go)
208 {
209 }
210 cmm_smp_mb();
211
212 for (;;) {
213 pthread_rwlock_wrlock(&lock);
214 test_array.a = 0;
215 test_array.a = 8;
216 if (caa_unlikely(wduration))
217 loop_sleep(wduration);
218 pthread_rwlock_unlock(&lock);
219 URCU_TLS(nr_writes)++;
220 if (caa_unlikely(!test_duration_write()))
221 break;
222 if (caa_unlikely(wdelay))
223 loop_sleep(wdelay);
224 }
225
226 printf_verbose("thread_end %s, tid %lu\n",
227 "writer", urcu_get_thread_id());
228 *count = URCU_TLS(nr_writes);
229 return ((void*)2);
230 }
231
232 void show_usage(int argc, char **argv)
233 {
234 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
235 argv[0]);
236 printf("OPTIONS:\n");
237 printf(" [-d delay] (writer period (us))\n");
238 printf(" [-c duration] (reader C.S. duration (in loops))\n");
239 printf(" [-e duration] (writer C.S. duration (in loops))\n");
240 printf(" [-v] (verbose output)\n");
241 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
242 printf("\n");
243 }
244
245 int main(int argc, char **argv)
246 {
247 int err;
248 pthread_t *tid_reader, *tid_writer;
249 void *tret;
250 unsigned long long *count_reader, *count_writer;
251 unsigned long long tot_reads = 0, tot_writes = 0;
252 int i, a;
253
254 if (argc < 4) {
255 show_usage(argc, argv);
256 return -1;
257 }
258 cmm_smp_mb();
259
260 err = sscanf(argv[1], "%u", &nr_readers);
261 if (err != 1) {
262 show_usage(argc, argv);
263 return -1;
264 }
265
266 err = sscanf(argv[2], "%u", &nr_writers);
267 if (err != 1) {
268 show_usage(argc, argv);
269 return -1;
270 }
271
272 err = sscanf(argv[3], "%lu", &duration);
273 if (err != 1) {
274 show_usage(argc, argv);
275 return -1;
276 }
277
278 for (i = 4; i < argc; i++) {
279 if (argv[i][0] != '-')
280 continue;
281 switch (argv[i][1]) {
282 case 'a':
283 if (argc < i + 2) {
284 show_usage(argc, argv);
285 return -1;
286 }
287 a = atoi(argv[++i]);
288 cpu_affinities[next_aff++] = a;
289 use_affinity = 1;
290 printf_verbose("Adding CPU %d affinity\n", a);
291 break;
292 case 'c':
293 if (argc < i + 2) {
294 show_usage(argc, argv);
295 return -1;
296 }
297 rduration = atol(argv[++i]);
298 break;
299 case 'd':
300 if (argc < i + 2) {
301 show_usage(argc, argv);
302 return -1;
303 }
304 wdelay = atol(argv[++i]);
305 break;
306 case 'e':
307 if (argc < i + 2) {
308 show_usage(argc, argv);
309 return -1;
310 }
311 wduration = atol(argv[++i]);
312 break;
313 case 'v':
314 verbose_mode = 1;
315 break;
316 }
317 }
318
319 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
320 duration, nr_readers, nr_writers);
321 printf_verbose("Writer delay : %lu loops.\n", wdelay);
322 printf_verbose("Reader duration : %lu loops.\n", rduration);
323 printf_verbose("thread %-6s, tid %lu\n",
324 "main", urcu_get_thread_id());
325
326 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
327 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
328 count_reader = calloc(nr_readers, sizeof(*count_reader));
329 count_writer = calloc(nr_writers, sizeof(*count_writer));
330
331 next_aff = 0;
332
333 for (i = 0; i < nr_readers; i++) {
334 err = pthread_create(&tid_reader[i], NULL, thr_reader,
335 &count_reader[i]);
336 if (err != 0)
337 exit(1);
338 }
339 for (i = 0; i < nr_writers; i++) {
340 err = pthread_create(&tid_writer[i], NULL, thr_writer,
341 &count_writer[i]);
342 if (err != 0)
343 exit(1);
344 }
345
346 cmm_smp_mb();
347
348 test_go = 1;
349
350 sleep(duration);
351
352 test_stop = 1;
353
354 for (i = 0; i < nr_readers; i++) {
355 err = pthread_join(tid_reader[i], &tret);
356 if (err != 0)
357 exit(1);
358 tot_reads += count_reader[i];
359 }
360 for (i = 0; i < nr_writers; i++) {
361 err = pthread_join(tid_writer[i], &tret);
362 if (err != 0)
363 exit(1);
364 tot_writes += count_writer[i];
365 }
366
367 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
368 tot_writes);
369 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
370 "nr_writers %3u "
371 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
372 argv[0], duration, nr_readers, rduration, wduration,
373 nr_writers, wdelay, tot_reads, tot_writes,
374 tot_reads + tot_writes);
375
376 free(tid_reader);
377 free(tid_writer);
378 free(count_reader);
379 free(count_writer);
380 return 0;
381 }
This page took 0.054328 seconds and 4 git commands to generate.