Fix: handle sys_futex() FUTEX_WAIT interrupted by signal
[urcu.git] / tests / benchmark / test_urcu_assign.c
1 /*
2 * test_urcu_assign.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 struct test_array {
51 int a;
52 };
53
54 static volatile int test_go, test_stop;
55
56 static unsigned long wdelay;
57
58 static struct test_array *test_rcu_pointer;
59
60 static unsigned long duration;
61
62 /* read-side C.S. duration, in loops */
63 static unsigned long rduration;
64
65 /* write-side C.S. duration, in loops */
66 static unsigned long wduration;
67
68 static inline void loop_sleep(unsigned long loops)
69 {
70 while (loops-- != 0)
71 caa_cpu_relax();
72 }
73
74 static int verbose_mode;
75
76 #define printf_verbose(fmt, args...) \
77 do { \
78 if (verbose_mode) \
79 printf(fmt, args); \
80 } while (0)
81
82 static unsigned int cpu_affinities[NR_CPUS];
83 static unsigned int next_aff = 0;
84 static int use_affinity = 0;
85
86 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
87
88 static void set_affinity(void)
89 {
90 #if HAVE_SCHED_SETAFFINITY
91 cpu_set_t mask;
92 int cpu, ret;
93 #endif /* HAVE_SCHED_SETAFFINITY */
94
95 if (!use_affinity)
96 return;
97
98 #if HAVE_SCHED_SETAFFINITY
99 ret = pthread_mutex_lock(&affinity_mutex);
100 if (ret) {
101 perror("Error in pthread mutex lock");
102 exit(-1);
103 }
104 cpu = cpu_affinities[next_aff++];
105 ret = pthread_mutex_unlock(&affinity_mutex);
106 if (ret) {
107 perror("Error in pthread mutex unlock");
108 exit(-1);
109 }
110
111 CPU_ZERO(&mask);
112 CPU_SET(cpu, &mask);
113 #if SCHED_SETAFFINITY_ARGS == 2
114 sched_setaffinity(0, &mask);
115 #else
116 sched_setaffinity(0, sizeof(mask), &mask);
117 #endif
118 #endif /* HAVE_SCHED_SETAFFINITY */
119 }
120
121 /*
122 * returns 0 if test should end.
123 */
124 static int test_duration_write(void)
125 {
126 return !test_stop;
127 }
128
129 static int test_duration_read(void)
130 {
131 return !test_stop;
132 }
133
134 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
135 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
136
137 static unsigned int nr_readers;
138 static unsigned int nr_writers;
139
140 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
141
142 void rcu_copy_mutex_lock(void)
143 {
144 int ret;
145 ret = pthread_mutex_lock(&rcu_copy_mutex);
146 if (ret) {
147 perror("Error in pthread mutex lock");
148 exit(-1);
149 }
150 }
151
152 void rcu_copy_mutex_unlock(void)
153 {
154 int ret;
155
156 ret = pthread_mutex_unlock(&rcu_copy_mutex);
157 if (ret) {
158 perror("Error in pthread mutex unlock");
159 exit(-1);
160 }
161 }
162
163 /*
164 * malloc/free are reusing memory areas too quickly, which does not let us
165 * test races appropriately. Use a large circular array for allocations.
166 * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across
167 * both alloc and free, which insures we never run over our tail.
168 */
169 #define ARRAY_SIZE (1048576 * nr_writers)
170 #define ARRAY_POISON 0xDEADBEEF
171 static int array_index;
172 static struct test_array *test_array;
173
174 static struct test_array *test_array_alloc(void)
175 {
176 struct test_array *ret;
177 int index;
178
179 index = array_index % ARRAY_SIZE;
180 assert(test_array[index].a == ARRAY_POISON ||
181 test_array[index].a == 0);
182 ret = &test_array[index];
183 array_index++;
184 if (array_index == ARRAY_SIZE)
185 array_index = 0;
186 return ret;
187 }
188
189 static void test_array_free(struct test_array *ptr)
190 {
191 if (!ptr)
192 return;
193 ptr->a = ARRAY_POISON;
194 }
195
196 void *thr_reader(void *_count)
197 {
198 unsigned long long *count = _count;
199 struct test_array *local_ptr;
200
201 printf_verbose("thread_begin %s, tid %lu\n",
202 "reader", urcu_get_thread_id());
203
204 set_affinity();
205
206 rcu_register_thread();
207
208 while (!test_go)
209 {
210 }
211 cmm_smp_mb();
212
213 for (;;) {
214 rcu_read_lock();
215 local_ptr = rcu_dereference(test_rcu_pointer);
216 rcu_debug_yield_read();
217 if (local_ptr)
218 assert(local_ptr->a == 8);
219 if (caa_unlikely(rduration))
220 loop_sleep(rduration);
221 rcu_read_unlock();
222 URCU_TLS(nr_reads)++;
223 if (caa_unlikely(!test_duration_read()))
224 break;
225 }
226
227 rcu_unregister_thread();
228
229 *count = URCU_TLS(nr_reads);
230 printf_verbose("thread_end %s, tid %lu\n",
231 "reader", urcu_get_thread_id());
232 return ((void*)1);
233
234 }
235
236 void *thr_writer(void *_count)
237 {
238 unsigned long long *count = _count;
239 struct test_array *new, *old;
240
241 printf_verbose("thread_begin %s, tid %lu\n",
242 "writer", urcu_get_thread_id());
243
244 set_affinity();
245
246 while (!test_go)
247 {
248 }
249 cmm_smp_mb();
250
251 for (;;) {
252 rcu_copy_mutex_lock();
253 new = test_array_alloc();
254 new->a = 8;
255 old = test_rcu_pointer;
256 rcu_assign_pointer(test_rcu_pointer, new);
257 if (caa_unlikely(wduration))
258 loop_sleep(wduration);
259 synchronize_rcu();
260 if (old)
261 old->a = 0;
262 test_array_free(old);
263 rcu_copy_mutex_unlock();
264 URCU_TLS(nr_writes)++;
265 if (caa_unlikely(!test_duration_write()))
266 break;
267 if (caa_unlikely(wdelay))
268 loop_sleep(wdelay);
269 }
270
271 printf_verbose("thread_end %s, tid %lu\n",
272 "writer", urcu_get_thread_id());
273 *count = URCU_TLS(nr_writes);
274 return ((void*)2);
275 }
276
277 void show_usage(int argc, char **argv)
278 {
279 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
280 argv[0]);
281 printf("OPTIONS:\n");
282 printf(" [-r] [-w] (yield reader and/or writer)\n");
283 printf(" [-d delay] (writer period (us))\n");
284 printf(" [-c duration] (reader C.S. duration (in loops))\n");
285 printf(" [-e duration] (writer C.S. duration (in loops))\n");
286 printf(" [-v] (verbose output)\n");
287 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
288 printf("\n");
289 }
290
291 int main(int argc, char **argv)
292 {
293 int err;
294 pthread_t *tid_reader, *tid_writer;
295 void *tret;
296 unsigned long long *count_reader, *count_writer;
297 unsigned long long tot_reads = 0, tot_writes = 0;
298 int i, a;
299
300 if (argc < 4) {
301 show_usage(argc, argv);
302 return -1;
303 }
304
305 err = sscanf(argv[1], "%u", &nr_readers);
306 if (err != 1) {
307 show_usage(argc, argv);
308 return -1;
309 }
310
311 err = sscanf(argv[2], "%u", &nr_writers);
312 if (err != 1) {
313 show_usage(argc, argv);
314 return -1;
315 }
316
317 err = sscanf(argv[3], "%lu", &duration);
318 if (err != 1) {
319 show_usage(argc, argv);
320 return -1;
321 }
322
323 for (i = 4; i < argc; i++) {
324 if (argv[i][0] != '-')
325 continue;
326 switch (argv[i][1]) {
327 case 'r':
328 rcu_debug_yield_enable(RCU_YIELD_READ);
329 break;
330 case 'w':
331 rcu_debug_yield_enable(RCU_YIELD_WRITE);
332 break;
333 case 'a':
334 if (argc < i + 2) {
335 show_usage(argc, argv);
336 return -1;
337 }
338 a = atoi(argv[++i]);
339 cpu_affinities[next_aff++] = a;
340 use_affinity = 1;
341 printf_verbose("Adding CPU %d affinity\n", a);
342 break;
343 case 'c':
344 if (argc < i + 2) {
345 show_usage(argc, argv);
346 return -1;
347 }
348 rduration = atol(argv[++i]);
349 break;
350 case 'd':
351 if (argc < i + 2) {
352 show_usage(argc, argv);
353 return -1;
354 }
355 wdelay = atol(argv[++i]);
356 break;
357 case 'e':
358 if (argc < i + 2) {
359 show_usage(argc, argv);
360 return -1;
361 }
362 wduration = atol(argv[++i]);
363 break;
364 case 'v':
365 verbose_mode = 1;
366 break;
367 }
368 }
369
370 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
371 duration, nr_readers, nr_writers);
372 printf_verbose("Writer delay : %lu loops.\n", wdelay);
373 printf_verbose("Reader duration : %lu loops.\n", rduration);
374 printf_verbose("thread %-6s, tid %lu\n",
375 "main", urcu_get_thread_id());
376
377 test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE);
378 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
379 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
380 count_reader = calloc(nr_readers, sizeof(*count_reader));
381 count_writer = calloc(nr_writers, sizeof(*count_writer));
382
383 next_aff = 0;
384
385 for (i = 0; i < nr_readers; i++) {
386 err = pthread_create(&tid_reader[i], NULL, thr_reader,
387 &count_reader[i]);
388 if (err != 0)
389 exit(1);
390 }
391 for (i = 0; i < nr_writers; i++) {
392 err = pthread_create(&tid_writer[i], NULL, thr_writer,
393 &count_writer[i]);
394 if (err != 0)
395 exit(1);
396 }
397
398 cmm_smp_mb();
399
400 test_go = 1;
401
402 sleep(duration);
403
404 test_stop = 1;
405
406 for (i = 0; i < nr_readers; i++) {
407 err = pthread_join(tid_reader[i], &tret);
408 if (err != 0)
409 exit(1);
410 tot_reads += count_reader[i];
411 }
412 for (i = 0; i < nr_writers; i++) {
413 err = pthread_join(tid_writer[i], &tret);
414 if (err != 0)
415 exit(1);
416 tot_writes += count_writer[i];
417 }
418
419 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
420 tot_writes);
421 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
422 "nr_writers %3u "
423 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
424 argv[0], duration, nr_readers, rduration, wduration,
425 nr_writers, wdelay, tot_reads, tot_writes,
426 tot_reads + tot_writes);
427 test_array_free(test_rcu_pointer);
428 free(test_array);
429 free(tid_reader);
430 free(tid_writer);
431 free(count_reader);
432 free(count_writer);
433 return 0;
434 }
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