9fea8c1f419bd9ff76f3d75d3464296b86d5481a
[urcu.git] / tests / 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 #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
40 #ifdef __linux__
41 #include <syscall.h>
42 #endif
43
44 /* hardcoded number of CPUs */
45 #define NR_CPUS 16384
46
47 #if defined(_syscall0)
48 _syscall0(pid_t, gettid)
49 #elif defined(__NR_gettid)
50 static inline pid_t gettid(void)
51 {
52 return syscall(__NR_gettid);
53 }
54 #else
55 #warning "use pid as tid"
56 static inline pid_t gettid(void)
57 {
58 return getpid();
59 }
60 #endif
61
62 #ifndef DYNAMIC_LINK_TEST
63 #define _LGPL_SOURCE
64 #else
65 #define rcu_debug_yield_read()
66 #endif
67 #include <urcu.h>
68 #include <urcu-defer.h>
69
70 struct test_array {
71 int a;
72 };
73
74 static volatile int test_go, test_stop;
75
76 static unsigned long wdelay;
77
78 static struct test_array *test_rcu_pointer;
79
80 static unsigned long duration;
81
82 /* read-side C.S. duration, in loops */
83 static unsigned long rduration;
84
85 /* write-side C.S. duration, in loops */
86 static unsigned long wduration;
87
88 static inline void loop_sleep(unsigned long loops)
89 {
90 while (loops-- != 0)
91 caa_cpu_relax();
92 }
93
94 static int verbose_mode;
95
96 #define printf_verbose(fmt, args...) \
97 do { \
98 if (verbose_mode) \
99 printf(fmt, args); \
100 } while (0)
101
102 static unsigned int cpu_affinities[NR_CPUS];
103 static unsigned int next_aff = 0;
104 static int use_affinity = 0;
105
106 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
107
108 static void set_affinity(void)
109 {
110 #if HAVE_SCHED_SETAFFINITY
111 cpu_set_t mask;
112 int cpu, ret;
113 #endif /* HAVE_SCHED_SETAFFINITY */
114
115 if (!use_affinity)
116 return;
117
118 #if HAVE_SCHED_SETAFFINITY
119 ret = pthread_mutex_lock(&affinity_mutex);
120 if (ret) {
121 perror("Error in pthread mutex lock");
122 exit(-1);
123 }
124 cpu = cpu_affinities[next_aff++];
125 ret = pthread_mutex_unlock(&affinity_mutex);
126 if (ret) {
127 perror("Error in pthread mutex unlock");
128 exit(-1);
129 }
130
131 CPU_ZERO(&mask);
132 CPU_SET(cpu, &mask);
133 #if SCHED_SETAFFINITY_ARGS == 2
134 sched_setaffinity(0, &mask);
135 #else
136 sched_setaffinity(0, sizeof(mask), &mask);
137 #endif
138 #endif /* HAVE_SCHED_SETAFFINITY */
139 }
140
141 /*
142 * returns 0 if test should end.
143 */
144 static int test_duration_write(void)
145 {
146 return !test_stop;
147 }
148
149 static int test_duration_read(void)
150 {
151 return !test_stop;
152 }
153
154 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
155 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
156
157 static
158 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
159
160 static unsigned int nr_readers;
161 static unsigned int nr_writers;
162
163 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
164
165 void rcu_copy_mutex_lock(void)
166 {
167 int ret;
168 ret = pthread_mutex_lock(&rcu_copy_mutex);
169 if (ret) {
170 perror("Error in pthread mutex lock");
171 exit(-1);
172 }
173 }
174
175 void rcu_copy_mutex_unlock(void)
176 {
177 int ret;
178
179 ret = pthread_mutex_unlock(&rcu_copy_mutex);
180 if (ret) {
181 perror("Error in pthread mutex unlock");
182 exit(-1);
183 }
184 }
185
186 void *thr_reader(void *_count)
187 {
188 unsigned long long *count = _count;
189 struct test_array *local_ptr;
190
191 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
192 "reader", (unsigned long) pthread_self(),
193 (unsigned long) gettid());
194
195 set_affinity();
196
197 rcu_register_thread();
198
199 while (!test_go)
200 {
201 }
202 cmm_smp_mb();
203
204 for (;;) {
205 rcu_read_lock();
206 local_ptr = rcu_dereference(test_rcu_pointer);
207 rcu_debug_yield_read();
208 if (local_ptr)
209 assert(local_ptr->a == 8);
210 if (caa_unlikely(rduration))
211 loop_sleep(rduration);
212 rcu_read_unlock();
213 URCU_TLS(nr_reads)++;
214 if (caa_unlikely(!test_duration_read()))
215 break;
216 }
217
218 rcu_unregister_thread();
219
220 *count = URCU_TLS(nr_reads);
221 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
222 "reader", (unsigned long) pthread_self(),
223 (unsigned long) gettid());
224 return ((void*)1);
225
226 }
227
228 static void test_cb2(void *data)
229 {
230 }
231
232 static void test_cb1(void *data)
233 {
234 }
235
236 void *thr_writer(void *data)
237 {
238 unsigned long wtidx = (unsigned long)data;
239 struct test_array *new, *old = NULL;
240 int ret;
241
242 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
243 "writer", (unsigned long) pthread_self(),
244 (unsigned long) gettid());
245
246 set_affinity();
247
248 ret = rcu_defer_register_thread();
249 if (ret) {
250 printf("Error in rcu_defer_register_thread\n");
251 exit(-1);
252 }
253
254 while (!test_go)
255 {
256 }
257 cmm_smp_mb();
258
259 for (;;) {
260 new = malloc(sizeof(*new));
261 new->a = 8;
262 old = rcu_xchg_pointer(&test_rcu_pointer, new);
263 if (caa_unlikely(wduration))
264 loop_sleep(wduration);
265 defer_rcu(free, old);
266 defer_rcu(test_cb1, old);
267 defer_rcu(test_cb1, (void *)-2L);
268 defer_rcu(test_cb1, (void *)-2L);
269 defer_rcu(test_cb1, old);
270 defer_rcu(test_cb2, (void *)-2L);
271 defer_rcu(test_cb2, (void *)-4L);
272 defer_rcu(test_cb2, (void *)-2L);
273 URCU_TLS(nr_writes)++;
274 if (caa_unlikely(!test_duration_write()))
275 break;
276 if (caa_unlikely(wdelay))
277 loop_sleep(wdelay);
278 }
279
280 rcu_defer_unregister_thread();
281
282 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
283 "writer", (unsigned long) pthread_self(),
284 (unsigned long) gettid());
285 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
286 return ((void*)2);
287 }
288
289 void show_usage(int argc, char **argv)
290 {
291 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
292 #ifdef DEBUG_YIELD
293 printf(" [-r] [-w] (yield reader and/or writer)");
294 #endif
295 printf(" [-d delay] (writer period (us))");
296 printf(" [-c duration] (reader C.S. duration (in loops))");
297 printf(" [-e duration] (writer C.S. duration (in loops))");
298 printf(" [-v] (verbose output)");
299 printf(" [-a cpu#] [-a cpu#]... (affinity)");
300 printf("\n");
301 }
302
303 int main(int argc, char **argv)
304 {
305 int err;
306 pthread_t *tid_reader, *tid_writer;
307 void *tret;
308 unsigned long long *count_reader;
309 unsigned long long tot_reads = 0, tot_writes = 0;
310 int i, a;
311
312 if (argc < 4) {
313 show_usage(argc, argv);
314 return -1;
315 }
316
317 err = sscanf(argv[1], "%u", &nr_readers);
318 if (err != 1) {
319 show_usage(argc, argv);
320 return -1;
321 }
322
323 err = sscanf(argv[2], "%u", &nr_writers);
324 if (err != 1) {
325 show_usage(argc, argv);
326 return -1;
327 }
328
329 err = sscanf(argv[3], "%lu", &duration);
330 if (err != 1) {
331 show_usage(argc, argv);
332 return -1;
333 }
334
335 for (i = 4; i < argc; i++) {
336 if (argv[i][0] != '-')
337 continue;
338 switch (argv[i][1]) {
339 #ifdef DEBUG_YIELD
340 case 'r':
341 rcu_yield_active |= RCU_YIELD_READ;
342 break;
343 case 'w':
344 rcu_yield_active |= RCU_YIELD_WRITE;
345 break;
346 #endif
347 case 'a':
348 if (argc < i + 2) {
349 show_usage(argc, argv);
350 return -1;
351 }
352 a = atoi(argv[++i]);
353 cpu_affinities[next_aff++] = a;
354 use_affinity = 1;
355 printf_verbose("Adding CPU %d affinity\n", a);
356 break;
357 case 'c':
358 if (argc < i + 2) {
359 show_usage(argc, argv);
360 return -1;
361 }
362 rduration = atol(argv[++i]);
363 break;
364 case 'd':
365 if (argc < i + 2) {
366 show_usage(argc, argv);
367 return -1;
368 }
369 wdelay = atol(argv[++i]);
370 break;
371 case 'e':
372 if (argc < i + 2) {
373 show_usage(argc, argv);
374 return -1;
375 }
376 wduration = atol(argv[++i]);
377 break;
378 case 'v':
379 verbose_mode = 1;
380 break;
381 }
382 }
383
384 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
385 duration, nr_readers, nr_writers);
386 printf_verbose("Writer delay : %lu loops.\n", wdelay);
387 printf_verbose("Reader duration : %lu loops.\n", rduration);
388 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
389 "main", (unsigned long) pthread_self(),
390 (unsigned long) gettid());
391
392 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
393 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
394 count_reader = malloc(sizeof(*count_reader) * nr_readers);
395 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
396
397 next_aff = 0;
398
399 for (i = 0; i < nr_readers; i++) {
400 err = pthread_create(&tid_reader[i], NULL, thr_reader,
401 &count_reader[i]);
402 if (err != 0)
403 exit(1);
404 }
405 for (i = 0; i < nr_writers; i++) {
406 err = pthread_create(&tid_writer[i], NULL, thr_writer,
407 (void *)(long)i);
408 if (err != 0)
409 exit(1);
410 }
411
412 cmm_smp_mb();
413
414 test_go = 1;
415
416 sleep(duration);
417
418 test_stop = 1;
419
420 for (i = 0; i < nr_readers; i++) {
421 err = pthread_join(tid_reader[i], &tret);
422 if (err != 0)
423 exit(1);
424 tot_reads += count_reader[i];
425 }
426 for (i = 0; i < nr_writers; i++) {
427 err = pthread_join(tid_writer[i], &tret);
428 if (err != 0)
429 exit(1);
430 tot_writes += tot_nr_writes[i];
431 }
432
433 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
434 tot_writes);
435 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
436 "nr_writers %3u "
437 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
438 argv[0], duration, nr_readers, rduration, wduration,
439 nr_writers, wdelay, tot_reads, tot_writes,
440 tot_reads + tot_writes);
441 free(tid_reader);
442 free(tid_writer);
443 free(count_reader);
444 free(tot_nr_writes);
445
446 return 0;
447 }
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