0a4964176cd7c77b331019f1cd29ea21d957f1aa
[urcu.git] / tests / benchmark / test_urcu_defer.c
1 /*
2 * test_urcu_defer.c
3 *
4 * Userspace RCU library - test program (with automatic 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 #include <stdio.h>
24 #include <pthread.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <sys/types.h>
28 #include <sys/wait.h>
29 #include <unistd.h>
30 #include <stdio.h>
31 #include <assert.h>
32 #include <errno.h>
33
34 #include <urcu/arch.h>
35 #include <urcu/tls-compat.h>
36 #include "cpuset.h"
37 #include "thread-id.h"
38 #include "../common/debug-yield.h"
39
40 /* hardcoded number of CPUs */
41 #define NR_CPUS 16384
42
43 #ifndef DYNAMIC_LINK_TEST
44 #define _LGPL_SOURCE
45 #endif
46 #include <urcu.h>
47 #include <urcu-defer.h>
48
49 struct test_array {
50 int a;
51 };
52
53 static volatile int test_go, test_stop;
54
55 static unsigned long wdelay;
56
57 static struct test_array *test_rcu_pointer;
58
59 static unsigned long duration;
60
61 /* read-side C.S. duration, in loops */
62 static unsigned long rduration;
63
64 /* write-side C.S. duration, in loops */
65 static unsigned long wduration;
66
67 static inline void loop_sleep(unsigned long loops)
68 {
69 while (loops-- != 0)
70 caa_cpu_relax();
71 }
72
73 static int verbose_mode;
74
75 #define printf_verbose(fmt, args...) \
76 do { \
77 if (verbose_mode) \
78 printf(fmt, args); \
79 } while (0)
80
81 static unsigned int cpu_affinities[NR_CPUS];
82 static unsigned int next_aff = 0;
83 static int use_affinity = 0;
84
85 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
86
87 static void set_affinity(void)
88 {
89 #if HAVE_SCHED_SETAFFINITY
90 cpu_set_t mask;
91 int cpu, ret;
92 #endif /* HAVE_SCHED_SETAFFINITY */
93
94 if (!use_affinity)
95 return;
96
97 #if HAVE_SCHED_SETAFFINITY
98 ret = pthread_mutex_lock(&affinity_mutex);
99 if (ret) {
100 perror("Error in pthread mutex lock");
101 exit(-1);
102 }
103 cpu = cpu_affinities[next_aff++];
104 ret = pthread_mutex_unlock(&affinity_mutex);
105 if (ret) {
106 perror("Error in pthread mutex unlock");
107 exit(-1);
108 }
109
110 CPU_ZERO(&mask);
111 CPU_SET(cpu, &mask);
112 #if SCHED_SETAFFINITY_ARGS == 2
113 sched_setaffinity(0, &mask);
114 #else
115 sched_setaffinity(0, sizeof(mask), &mask);
116 #endif
117 #endif /* HAVE_SCHED_SETAFFINITY */
118 }
119
120 /*
121 * returns 0 if test should end.
122 */
123 static int test_duration_write(void)
124 {
125 return !test_stop;
126 }
127
128 static int test_duration_read(void)
129 {
130 return !test_stop;
131 }
132
133 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
134 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
135
136 static
137 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
138
139 static unsigned int nr_readers;
140 static unsigned int nr_writers;
141
142 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
143
144 void rcu_copy_mutex_lock(void)
145 {
146 int ret;
147 ret = pthread_mutex_lock(&rcu_copy_mutex);
148 if (ret) {
149 perror("Error in pthread mutex lock");
150 exit(-1);
151 }
152 }
153
154 void rcu_copy_mutex_unlock(void)
155 {
156 int ret;
157
158 ret = pthread_mutex_unlock(&rcu_copy_mutex);
159 if (ret) {
160 perror("Error in pthread mutex unlock");
161 exit(-1);
162 }
163 }
164
165 void *thr_reader(void *_count)
166 {
167 unsigned long long *count = _count;
168 struct test_array *local_ptr;
169
170 printf_verbose("thread_begin %s, tid %lu\n",
171 "reader", urcu_get_thread_id());
172
173 set_affinity();
174
175 rcu_register_thread();
176
177 while (!test_go)
178 {
179 }
180 cmm_smp_mb();
181
182 for (;;) {
183 rcu_read_lock();
184 local_ptr = rcu_dereference(test_rcu_pointer);
185 rcu_debug_yield_read();
186 if (local_ptr)
187 assert(local_ptr->a == 8);
188 if (caa_unlikely(rduration))
189 loop_sleep(rduration);
190 rcu_read_unlock();
191 URCU_TLS(nr_reads)++;
192 if (caa_unlikely(!test_duration_read()))
193 break;
194 }
195
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 static void test_cb2(void *data)
206 {
207 }
208
209 static void test_cb1(void *data)
210 {
211 }
212
213 void *thr_writer(void *data)
214 {
215 unsigned long wtidx = (unsigned long)data;
216 struct test_array *new, *old = NULL;
217 int ret;
218
219 printf_verbose("thread_begin %s, tid %lu\n",
220 "writer", urcu_get_thread_id());
221
222 set_affinity();
223
224 ret = rcu_defer_register_thread();
225 if (ret) {
226 printf("Error in rcu_defer_register_thread\n");
227 exit(-1);
228 }
229
230 while (!test_go)
231 {
232 }
233 cmm_smp_mb();
234
235 for (;;) {
236 new = malloc(sizeof(*new));
237 new->a = 8;
238 old = rcu_xchg_pointer(&test_rcu_pointer, new);
239 if (caa_unlikely(wduration))
240 loop_sleep(wduration);
241 defer_rcu(free, old);
242 defer_rcu(test_cb1, old);
243 defer_rcu(test_cb1, (void *)-2L);
244 defer_rcu(test_cb1, (void *)-2L);
245 defer_rcu(test_cb1, old);
246 defer_rcu(test_cb2, (void *)-2L);
247 defer_rcu(test_cb2, (void *)-4L);
248 defer_rcu(test_cb2, (void *)-2L);
249 URCU_TLS(nr_writes)++;
250 if (caa_unlikely(!test_duration_write()))
251 break;
252 if (caa_unlikely(wdelay))
253 loop_sleep(wdelay);
254 }
255
256 rcu_defer_unregister_thread();
257
258 printf_verbose("thread_end %s, tid %lu\n",
259 "writer", urcu_get_thread_id());
260 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
261 return ((void*)2);
262 }
263
264 void show_usage(int argc, char **argv)
265 {
266 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
267 argv[0]);
268 printf("OPTIONS:\n");
269 printf(" [-r] [-w] (yield reader and/or writer)\n");
270 printf(" [-d delay] (writer period (us))\n");
271 printf(" [-c duration] (reader C.S. duration (in loops))\n");
272 printf(" [-e duration] (writer C.S. duration (in loops))\n");
273 printf(" [-v] (verbose output)\n");
274 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
275 printf("\n");
276 }
277
278 int main(int argc, char **argv)
279 {
280 int err;
281 pthread_t *tid_reader, *tid_writer;
282 void *tret;
283 unsigned long long *count_reader;
284 unsigned long long tot_reads = 0, tot_writes = 0;
285 int i, a;
286
287 if (argc < 4) {
288 show_usage(argc, argv);
289 return -1;
290 }
291
292 err = sscanf(argv[1], "%u", &nr_readers);
293 if (err != 1) {
294 show_usage(argc, argv);
295 return -1;
296 }
297
298 err = sscanf(argv[2], "%u", &nr_writers);
299 if (err != 1) {
300 show_usage(argc, argv);
301 return -1;
302 }
303
304 err = sscanf(argv[3], "%lu", &duration);
305 if (err != 1) {
306 show_usage(argc, argv);
307 return -1;
308 }
309
310 for (i = 4; i < argc; i++) {
311 if (argv[i][0] != '-')
312 continue;
313 switch (argv[i][1]) {
314 case 'r':
315 rcu_debug_yield_enable(RCU_YIELD_READ);
316 break;
317 case 'w':
318 rcu_debug_yield_enable(RCU_YIELD_WRITE);
319 break;
320 case 'a':
321 if (argc < i + 2) {
322 show_usage(argc, argv);
323 return -1;
324 }
325 a = atoi(argv[++i]);
326 cpu_affinities[next_aff++] = a;
327 use_affinity = 1;
328 printf_verbose("Adding CPU %d affinity\n", a);
329 break;
330 case 'c':
331 if (argc < i + 2) {
332 show_usage(argc, argv);
333 return -1;
334 }
335 rduration = atol(argv[++i]);
336 break;
337 case 'd':
338 if (argc < i + 2) {
339 show_usage(argc, argv);
340 return -1;
341 }
342 wdelay = atol(argv[++i]);
343 break;
344 case 'e':
345 if (argc < i + 2) {
346 show_usage(argc, argv);
347 return -1;
348 }
349 wduration = atol(argv[++i]);
350 break;
351 case 'v':
352 verbose_mode = 1;
353 break;
354 }
355 }
356
357 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
358 duration, nr_readers, nr_writers);
359 printf_verbose("Writer delay : %lu loops.\n", wdelay);
360 printf_verbose("Reader duration : %lu loops.\n", rduration);
361 printf_verbose("thread %-6s, tid %lu\n",
362 "main", urcu_get_thread_id());
363
364 tid_reader = calloc(nr_readers, sizeof(*tid_reader));
365 tid_writer = calloc(nr_writers, sizeof(*tid_writer));
366 count_reader = calloc(nr_readers, sizeof(*count_reader));
367 tot_nr_writes = calloc(nr_writers, sizeof(*tot_nr_writes));
368
369 next_aff = 0;
370
371 for (i = 0; i < nr_readers; i++) {
372 err = pthread_create(&tid_reader[i], NULL, thr_reader,
373 &count_reader[i]);
374 if (err != 0)
375 exit(1);
376 }
377 for (i = 0; i < nr_writers; i++) {
378 err = pthread_create(&tid_writer[i], NULL, thr_writer,
379 (void *)(long)i);
380 if (err != 0)
381 exit(1);
382 }
383
384 cmm_smp_mb();
385
386 test_go = 1;
387
388 sleep(duration);
389
390 test_stop = 1;
391
392 for (i = 0; i < nr_readers; i++) {
393 err = pthread_join(tid_reader[i], &tret);
394 if (err != 0)
395 exit(1);
396 tot_reads += count_reader[i];
397 }
398 for (i = 0; i < nr_writers; i++) {
399 err = pthread_join(tid_writer[i], &tret);
400 if (err != 0)
401 exit(1);
402 tot_writes += tot_nr_writes[i];
403 }
404
405 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
406 tot_writes);
407 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
408 "nr_writers %3u "
409 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
410 argv[0], duration, nr_readers, rduration, wduration,
411 nr_writers, wdelay, tot_reads, tot_writes,
412 tot_reads + tot_writes);
413 free(tid_reader);
414 free(tid_writer);
415 free(count_reader);
416 free(tot_nr_writes);
417
418 return 0;
419 }
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