urcu signal tests: use library rather than recompile source
[urcu.git] / tests / benchmark / test_urcu_gc.c
1 /*
2 * test_urcu_gc.c
3 *
4 * Userspace RCU library - test program (with batch reclamation)
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 int reclaim_batch = 1;
61
62 struct reclaim_queue {
63 void **queue; /* Beginning of queue */
64 void **head; /* Insert position */
65 };
66
67 static struct reclaim_queue *pending_reclaims;
68
69 static unsigned long duration;
70
71 /* read-side C.S. duration, in loops */
72 static unsigned long rduration;
73
74 /* write-side C.S. duration, in loops */
75 static unsigned long wduration;
76
77 static inline void loop_sleep(unsigned long loops)
78 {
79 while (loops-- != 0)
80 caa_cpu_relax();
81 }
82
83 static int verbose_mode;
84
85 #define printf_verbose(fmt, args...) \
86 do { \
87 if (verbose_mode) \
88 printf(fmt, args); \
89 } while (0)
90
91 static unsigned int cpu_affinities[NR_CPUS];
92 static unsigned int next_aff = 0;
93 static int use_affinity = 0;
94
95 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
96
97 static void set_affinity(void)
98 {
99 #if HAVE_SCHED_SETAFFINITY
100 cpu_set_t mask;
101 int cpu, ret;
102 #endif /* HAVE_SCHED_SETAFFINITY */
103
104 if (!use_affinity)
105 return;
106
107 #if HAVE_SCHED_SETAFFINITY
108 ret = pthread_mutex_lock(&affinity_mutex);
109 if (ret) {
110 perror("Error in pthread mutex lock");
111 exit(-1);
112 }
113 cpu = cpu_affinities[next_aff++];
114 ret = pthread_mutex_unlock(&affinity_mutex);
115 if (ret) {
116 perror("Error in pthread mutex unlock");
117 exit(-1);
118 }
119
120 CPU_ZERO(&mask);
121 CPU_SET(cpu, &mask);
122 #if SCHED_SETAFFINITY_ARGS == 2
123 sched_setaffinity(0, &mask);
124 #else
125 sched_setaffinity(0, sizeof(mask), &mask);
126 #endif
127 #endif /* HAVE_SCHED_SETAFFINITY */
128 }
129
130 /*
131 * returns 0 if test should end.
132 */
133 static int test_duration_write(void)
134 {
135 return !test_stop;
136 }
137
138 static int test_duration_read(void)
139 {
140 return !test_stop;
141 }
142
143 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
144 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
145
146 static
147 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
148
149 static unsigned int nr_readers;
150 static unsigned int nr_writers;
151
152 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
153
154 void rcu_copy_mutex_lock(void)
155 {
156 int ret;
157 ret = pthread_mutex_lock(&rcu_copy_mutex);
158 if (ret) {
159 perror("Error in pthread mutex lock");
160 exit(-1);
161 }
162 }
163
164 void rcu_copy_mutex_unlock(void)
165 {
166 int ret;
167
168 ret = pthread_mutex_unlock(&rcu_copy_mutex);
169 if (ret) {
170 perror("Error in pthread mutex unlock");
171 exit(-1);
172 }
173 }
174
175 void *thr_reader(void *_count)
176 {
177 unsigned long long *count = _count;
178 struct test_array *local_ptr;
179
180 printf_verbose("thread_begin %s, tid %lu\n",
181 "reader", urcu_get_thread_id());
182
183 set_affinity();
184
185 rcu_register_thread();
186
187 while (!test_go)
188 {
189 }
190 cmm_smp_mb();
191
192 for (;;) {
193 rcu_read_lock();
194 local_ptr = rcu_dereference(test_rcu_pointer);
195 rcu_debug_yield_read();
196 if (local_ptr)
197 assert(local_ptr->a == 8);
198 if (caa_unlikely(rduration))
199 loop_sleep(rduration);
200 rcu_read_unlock();
201 URCU_TLS(nr_reads)++;
202 if (caa_unlikely(!test_duration_read()))
203 break;
204 }
205
206 rcu_unregister_thread();
207
208 *count = URCU_TLS(nr_reads);
209 printf_verbose("thread_end %s, tid %lu\n",
210 "reader", urcu_get_thread_id());
211 return ((void*)1);
212
213 }
214
215 static void rcu_gc_clear_queue(unsigned long wtidx)
216 {
217 void **p;
218
219 /* Wait for Q.S and empty queue */
220 synchronize_rcu();
221
222 for (p = pending_reclaims[wtidx].queue;
223 p < pending_reclaims[wtidx].head; p++) {
224 /* poison */
225 if (*p)
226 ((struct test_array *)*p)->a = 0;
227 free(*p);
228 }
229 pending_reclaims[wtidx].head = pending_reclaims[wtidx].queue;
230 }
231
232 /* Using per-thread queue */
233 static void rcu_gc_reclaim(unsigned long wtidx, void *old)
234 {
235 /* Queue pointer */
236 *pending_reclaims[wtidx].head = old;
237 pending_reclaims[wtidx].head++;
238
239 if (caa_likely(pending_reclaims[wtidx].head - pending_reclaims[wtidx].queue
240 < reclaim_batch))
241 return;
242
243 rcu_gc_clear_queue(wtidx);
244 }
245
246 void *thr_writer(void *data)
247 {
248 unsigned long wtidx = (unsigned long)data;
249 #ifdef TEST_LOCAL_GC
250 struct test_array *old = NULL;
251 #else
252 struct test_array *new, *old;
253 #endif
254
255 printf_verbose("thread_begin %s, tid %lu\n",
256 "writer", urcu_get_thread_id());
257
258 set_affinity();
259
260 while (!test_go)
261 {
262 }
263 cmm_smp_mb();
264
265 for (;;) {
266 #ifndef TEST_LOCAL_GC
267 new = malloc(sizeof(*new));
268 new->a = 8;
269 old = rcu_xchg_pointer(&test_rcu_pointer, new);
270 #endif
271 if (caa_unlikely(wduration))
272 loop_sleep(wduration);
273 rcu_gc_reclaim(wtidx, old);
274 URCU_TLS(nr_writes)++;
275 if (caa_unlikely(!test_duration_write()))
276 break;
277 if (caa_unlikely(wdelay))
278 loop_sleep(wdelay);
279 }
280
281 printf_verbose("thread_end %s, tid %lu\n",
282 "writer", urcu_get_thread_id());
283 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
284 return ((void*)2);
285 }
286
287 void show_usage(int argc, char **argv)
288 {
289 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
290 argv[0]);
291 printf("OPTIONS:\n");
292 printf(" [-r] [-w] (yield reader and/or writer)\n");
293 printf(" [-d delay] (writer period (us))\n");
294 printf(" [-c duration] (reader C.S. duration (in loops))\n");
295 printf(" [-e duration] (writer C.S. duration (in loops))\n");
296 printf(" [-v] (verbose output)\n");
297 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
298 printf("\n");
299 }
300
301 int main(int argc, char **argv)
302 {
303 int err;
304 pthread_t *tid_reader, *tid_writer;
305 void *tret;
306 unsigned long long *count_reader;
307 unsigned long long tot_reads = 0, tot_writes = 0;
308 int i, a;
309
310 if (argc < 4) {
311 show_usage(argc, argv);
312 return -1;
313 }
314
315 err = sscanf(argv[1], "%u", &nr_readers);
316 if (err != 1) {
317 show_usage(argc, argv);
318 return -1;
319 }
320
321 err = sscanf(argv[2], "%u", &nr_writers);
322 if (err != 1) {
323 show_usage(argc, argv);
324 return -1;
325 }
326
327 err = sscanf(argv[3], "%lu", &duration);
328 if (err != 1) {
329 show_usage(argc, argv);
330 return -1;
331 }
332
333 for (i = 4; i < argc; i++) {
334 if (argv[i][0] != '-')
335 continue;
336 switch (argv[i][1]) {
337 case 'r':
338 rcu_debug_yield_enable(RCU_YIELD_READ);
339 break;
340 case 'w':
341 rcu_debug_yield_enable(RCU_YIELD_WRITE);
342 break;
343 case 'a':
344 if (argc < i + 2) {
345 show_usage(argc, argv);
346 return -1;
347 }
348 a = atoi(argv[++i]);
349 cpu_affinities[next_aff++] = a;
350 use_affinity = 1;
351 printf_verbose("Adding CPU %d affinity\n", a);
352 break;
353 case 'b':
354 if (argc < i + 2) {
355 show_usage(argc, argv);
356 return -1;
357 }
358 reclaim_batch = atol(argv[++i]);
359 break;
360 case 'c':
361 if (argc < i + 2) {
362 show_usage(argc, argv);
363 return -1;
364 }
365 rduration = atol(argv[++i]);
366 break;
367 case 'd':
368 if (argc < i + 2) {
369 show_usage(argc, argv);
370 return -1;
371 }
372 wdelay = atol(argv[++i]);
373 break;
374 case 'e':
375 if (argc < i + 2) {
376 show_usage(argc, argv);
377 return -1;
378 }
379 wduration = atol(argv[++i]);
380 break;
381 case 'v':
382 verbose_mode = 1;
383 break;
384 }
385 }
386
387 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
388 duration, nr_readers, nr_writers);
389 printf_verbose("Writer delay : %lu loops.\n", wdelay);
390 printf_verbose("Reader duration : %lu loops.\n", rduration);
391 printf_verbose("thread %-6s, tid %lu\n",
392 "main", urcu_get_thread_id());
393
394 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
395 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
396 count_reader = calloc(nr_readers, sizeof(*count_reader));
397 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
398 pending_reclaims = calloc(nr_writers, sizeof(*pending_reclaims));
399 if (reclaim_batch * sizeof(*pending_reclaims[i].queue)
400 < CAA_CACHE_LINE_SIZE)
401 for (i = 0; i < nr_writers; i++)
402 pending_reclaims[i].queue = calloc(1, CAA_CACHE_LINE_SIZE);
403 else
404 for (i = 0; i < nr_writers; i++)
405 pending_reclaims[i].queue = calloc(reclaim_batch,
406 sizeof(*pending_reclaims[i].queue));
407 for (i = 0; i < nr_writers; i++)
408 pending_reclaims[i].head = pending_reclaims[i].queue;
409
410 next_aff = 0;
411
412 for (i = 0; i < nr_readers; i++) {
413 err = pthread_create(&tid_reader[i], NULL, thr_reader,
414 &count_reader[i]);
415 if (err != 0)
416 exit(1);
417 }
418 for (i = 0; i < nr_writers; i++) {
419 err = pthread_create(&tid_writer[i], NULL, thr_writer,
420 (void *)(long)i);
421 if (err != 0)
422 exit(1);
423 }
424
425 cmm_smp_mb();
426
427 test_go = 1;
428
429 sleep(duration);
430
431 test_stop = 1;
432
433 for (i = 0; i < nr_readers; i++) {
434 err = pthread_join(tid_reader[i], &tret);
435 if (err != 0)
436 exit(1);
437 tot_reads += count_reader[i];
438 }
439 for (i = 0; i < nr_writers; i++) {
440 err = pthread_join(tid_writer[i], &tret);
441 if (err != 0)
442 exit(1);
443 tot_writes += tot_nr_writes[i];
444 rcu_gc_clear_queue(i);
445 }
446
447 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
448 tot_writes);
449 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
450 "nr_writers %3u "
451 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
452 "batch %u\n",
453 argv[0], duration, nr_readers, rduration, wduration,
454 nr_writers, wdelay, tot_reads, tot_writes,
455 tot_reads + tot_writes, reclaim_batch);
456 free(tid_reader);
457 free(tid_writer);
458 free(count_reader);
459 free(tot_nr_writes);
460 for (i = 0; i < nr_writers; i++)
461 free(pending_reclaims[i].queue);
462 free(pending_reclaims);
463
464 return 0;
465 }
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