Fix: handle sys_futex() FUTEX_WAIT interrupted by signal
[urcu.git] / tests / benchmark / test_urcu.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 #include <../common/debug-yield.h>
41
42 /* hardcoded number of CPUs */
43 #define NR_CPUS 16384
44
45 #ifndef DYNAMIC_LINK_TEST
46 #define _LGPL_SOURCE
47 #endif
48 #include <urcu.h>
49
50 static volatile int test_go, test_stop;
51
52 static unsigned long wdelay;
53
54 static int *test_rcu_pointer;
55
56 static unsigned long duration;
57
58 /* read-side C.S. duration, in loops */
59 static unsigned long rduration;
60
61 /* write-side C.S. duration, in loops */
62 static unsigned long wduration;
63
64 static inline void loop_sleep(unsigned long loops)
65 {
66 while (loops-- != 0)
67 caa_cpu_relax();
68 }
69
70 static int verbose_mode;
71
72 #define printf_verbose(fmt, args...) \
73 do { \
74 if (verbose_mode) \
75 printf(fmt, args); \
76 } while (0)
77
78 static unsigned int cpu_affinities[NR_CPUS];
79 static unsigned int next_aff = 0;
80 static int use_affinity = 0;
81
82 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
83
84 static void set_affinity(void)
85 {
86 #if HAVE_SCHED_SETAFFINITY
87 cpu_set_t mask;
88 int cpu, ret;
89 #endif /* HAVE_SCHED_SETAFFINITY */
90
91 if (!use_affinity)
92 return;
93
94 #if HAVE_SCHED_SETAFFINITY
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 }
106
107 CPU_ZERO(&mask);
108 CPU_SET(cpu, &mask);
109 #if SCHED_SETAFFINITY_ARGS == 2
110 sched_setaffinity(0, &mask);
111 #else
112 sched_setaffinity(0, sizeof(mask), &mask);
113 #endif
114 #endif /* HAVE_SCHED_SETAFFINITY */
115 }
116
117 /*
118 * returns 0 if test should end.
119 */
120 static int test_duration_write(void)
121 {
122 return !test_stop;
123 }
124
125 static int test_duration_read(void)
126 {
127 return !test_stop;
128 }
129
130 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
131 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
132
133 static unsigned int nr_readers;
134 static unsigned int nr_writers;
135
136 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
137
138 void 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
148 void 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
159 void *thr_reader(void *_count)
160 {
161 unsigned long long *count = _count;
162 int *local_ptr;
163
164 printf_verbose("thread_begin %s, tid %lu\n",
165 "reader", urcu_get_thread_id());
166
167 set_affinity();
168
169 rcu_register_thread();
170 assert(!rcu_read_ongoing());
171
172 while (!test_go)
173 {
174 }
175 cmm_smp_mb();
176
177 for (;;) {
178 rcu_read_lock();
179 assert(rcu_read_ongoing());
180 local_ptr = rcu_dereference(test_rcu_pointer);
181 rcu_debug_yield_read();
182 if (local_ptr)
183 assert(*local_ptr == 8);
184 if (caa_unlikely(rduration))
185 loop_sleep(rduration);
186 rcu_read_unlock();
187 URCU_TLS(nr_reads)++;
188 if (caa_unlikely(!test_duration_read()))
189 break;
190 }
191
192 rcu_unregister_thread();
193
194 /* test extra thread registration */
195 rcu_register_thread();
196 rcu_unregister_thread();
197
198 *count = URCU_TLS(nr_reads);
199 printf_verbose("thread_end %s, tid %lu\n",
200 "reader", urcu_get_thread_id());
201 return ((void*)1);
202
203 }
204
205 void *thr_writer(void *_count)
206 {
207 unsigned long long *count = _count;
208 int *new, *old;
209
210 printf_verbose("thread_begin %s, tid %lu\n",
211 "writer", urcu_get_thread_id());
212
213 set_affinity();
214
215 while (!test_go)
216 {
217 }
218 cmm_smp_mb();
219
220 for (;;) {
221 new = malloc(sizeof(int));
222 assert(new);
223 *new = 8;
224 old = rcu_xchg_pointer(&test_rcu_pointer, new);
225 if (caa_unlikely(wduration))
226 loop_sleep(wduration);
227 synchronize_rcu();
228 if (old)
229 *old = 0;
230 free(old);
231 URCU_TLS(nr_writes)++;
232 if (caa_unlikely(!test_duration_write()))
233 break;
234 if (caa_unlikely(wdelay))
235 loop_sleep(wdelay);
236 }
237
238 printf_verbose("thread_end %s, tid %lu\n",
239 "writer", urcu_get_thread_id());
240 *count = URCU_TLS(nr_writes);
241 return ((void*)2);
242 }
243
244 void show_usage(int argc, char **argv)
245 {
246 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
247 argv[0]);
248 printf("OPTIONS:\n");
249 printf(" [-r] [-w] (yield reader and/or writer)\n");
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");
255 printf("\n");
256 }
257
258 int main(int argc, char **argv)
259 {
260 int err;
261 pthread_t *tid_reader, *tid_writer;
262 void *tret;
263 unsigned long long *count_reader, *count_writer;
264 unsigned long long tot_reads = 0, tot_writes = 0;
265 int i, a;
266
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) {
274 show_usage(argc, argv);
275 return -1;
276 }
277
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);
285 if (err != 1) {
286 show_usage(argc, argv);
287 return -1;
288 }
289
290 for (i = 4; i < argc; i++) {
291 if (argv[i][0] != '-')
292 continue;
293 switch (argv[i][1]) {
294 case 'r':
295 rcu_debug_yield_enable(RCU_YIELD_READ);
296 break;
297 case 'w':
298 rcu_debug_yield_enable(RCU_YIELD_WRITE);
299 break;
300 case 'a':
301 if (argc < i + 2) {
302 show_usage(argc, argv);
303 return -1;
304 }
305 a = atoi(argv[++i]);
306 cpu_affinities[next_aff++] = a;
307 use_affinity = 1;
308 printf_verbose("Adding CPU %d affinity\n", a);
309 break;
310 case 'c':
311 if (argc < i + 2) {
312 show_usage(argc, argv);
313 return -1;
314 }
315 rduration = atol(argv[++i]);
316 break;
317 case 'd':
318 if (argc < i + 2) {
319 show_usage(argc, argv);
320 return -1;
321 }
322 wdelay = atol(argv[++i]);
323 break;
324 case 'e':
325 if (argc < i + 2) {
326 show_usage(argc, argv);
327 return -1;
328 }
329 wduration = atol(argv[++i]);
330 break;
331 case 'v':
332 verbose_mode = 1;
333 break;
334 }
335 }
336
337 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
338 duration, nr_readers, nr_writers);
339 printf_verbose("Writer delay : %lu loops.\n", wdelay);
340 printf_verbose("Reader duration : %lu loops.\n", rduration);
341 printf_verbose("thread %-6s, tid %lu\n",
342 "main", urcu_get_thread_id());
343
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));
348
349 next_aff = 0;
350
351 for (i = 0; i < nr_readers; i++) {
352 err = pthread_create(&tid_reader[i], NULL, thr_reader,
353 &count_reader[i]);
354 if (err != 0)
355 exit(1);
356 }
357 for (i = 0; i < nr_writers; i++) {
358 err = pthread_create(&tid_writer[i], NULL, thr_writer,
359 &count_writer[i]);
360 if (err != 0)
361 exit(1);
362 }
363
364 cmm_smp_mb();
365
366 test_go = 1;
367
368 sleep(duration);
369
370 test_stop = 1;
371
372 for (i = 0; i < nr_readers; i++) {
373 err = pthread_join(tid_reader[i], &tret);
374 if (err != 0)
375 exit(1);
376 tot_reads += count_reader[i];
377 }
378 for (i = 0; i < nr_writers; i++) {
379 err = pthread_join(tid_writer[i], &tret);
380 if (err != 0)
381 exit(1);
382 tot_writes += count_writer[i];
383 }
384
385 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
386 tot_writes);
387 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
388 "nr_writers %3u "
389 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
390 argv[0], duration, nr_readers, rduration, wduration,
391 nr_writers, wdelay, tot_reads, tot_writes,
392 tot_reads + tot_writes);
393 free(test_rcu_pointer);
394 free(tid_reader);
395 free(tid_writer);
396 free(count_reader);
397 free(count_writer);
398 return 0;
399 }
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