cds containers: lfqueue and lfstack: don't depend on a particular rcu flavor
[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 <sys/syscall.h>
35 #include <sched.h>
36 #include <errno.h>
37
38 #include <urcu/arch.h>
39
40 /* hardcoded number of CPUs */
41 #define NR_CPUS 16384
42
43 #if defined(_syscall0)
44 _syscall0(pid_t, gettid)
45 #elif defined(__NR_gettid)
46 static inline pid_t gettid(void)
47 {
48 return syscall(__NR_gettid);
49 }
50 #else
51 #warning "use pid as tid"
52 static inline pid_t gettid(void)
53 {
54 return getpid();
55 }
56 #endif
57
58 #ifndef DYNAMIC_LINK_TEST
59 #define _LGPL_SOURCE
60 #else
61 #define debug_yield_read()
62 #endif
63 #include <urcu.h>
64 #include <urcu-defer.h>
65
66 struct test_array {
67 int a;
68 };
69
70 static volatile int test_go, test_stop;
71
72 static unsigned long wdelay;
73
74 static struct test_array *test_rcu_pointer;
75
76 static unsigned long duration;
77
78 /* read-side C.S. duration, in loops */
79 static unsigned long rduration;
80
81 /* write-side C.S. duration, in loops */
82 static unsigned long wduration;
83
84 static inline void loop_sleep(unsigned long l)
85 {
86 while(l-- != 0)
87 caa_cpu_relax();
88 }
89
90 static int verbose_mode;
91
92 #define printf_verbose(fmt, args...) \
93 do { \
94 if (verbose_mode) \
95 printf(fmt, args); \
96 } while (0)
97
98 static unsigned int cpu_affinities[NR_CPUS];
99 static unsigned int next_aff = 0;
100 static int use_affinity = 0;
101
102 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
103
104 #ifndef HAVE_CPU_SET_T
105 typedef unsigned long cpu_set_t;
106 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
107 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
108 #endif
109
110 static void set_affinity(void)
111 {
112 cpu_set_t mask;
113 int cpu;
114 int ret;
115
116 if (!use_affinity)
117 return;
118
119 #if HAVE_SCHED_SETAFFINITY
120 ret = pthread_mutex_lock(&affinity_mutex);
121 if (ret) {
122 perror("Error in pthread mutex lock");
123 exit(-1);
124 }
125 cpu = cpu_affinities[next_aff++];
126 ret = pthread_mutex_unlock(&affinity_mutex);
127 if (ret) {
128 perror("Error in pthread mutex unlock");
129 exit(-1);
130 }
131
132 CPU_ZERO(&mask);
133 CPU_SET(cpu, &mask);
134 #if SCHED_SETAFFINITY_ARGS == 2
135 sched_setaffinity(0, &mask);
136 #else
137 sched_setaffinity(0, sizeof(mask), &mask);
138 #endif
139 #endif /* HAVE_SCHED_SETAFFINITY */
140 }
141
142 /*
143 * returns 0 if test should end.
144 */
145 static int test_duration_write(void)
146 {
147 return !test_stop;
148 }
149
150 static int test_duration_read(void)
151 {
152 return !test_stop;
153 }
154
155 static unsigned long long __thread nr_writes;
156 static unsigned long long __thread nr_reads;
157
158 static
159 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
160
161 static unsigned int nr_readers;
162 static unsigned int nr_writers;
163
164 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
165
166 void rcu_copy_mutex_lock(void)
167 {
168 int ret;
169 ret = pthread_mutex_lock(&rcu_copy_mutex);
170 if (ret) {
171 perror("Error in pthread mutex lock");
172 exit(-1);
173 }
174 }
175
176 void rcu_copy_mutex_unlock(void)
177 {
178 int ret;
179
180 ret = pthread_mutex_unlock(&rcu_copy_mutex);
181 if (ret) {
182 perror("Error in pthread mutex unlock");
183 exit(-1);
184 }
185 }
186
187 void *thr_reader(void *_count)
188 {
189 unsigned long long *count = _count;
190 struct test_array *local_ptr;
191
192 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
193 "reader", pthread_self(), (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 debug_yield_read();
208 if (local_ptr)
209 assert(local_ptr->a == 8);
210 if (unlikely(rduration))
211 loop_sleep(rduration);
212 rcu_read_unlock();
213 nr_reads++;
214 if (unlikely(!test_duration_read()))
215 break;
216 }
217
218 rcu_unregister_thread();
219
220 *count = nr_reads;
221 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
222 "reader", pthread_self(), (unsigned long)gettid());
223 return ((void*)1);
224
225 }
226
227 static void test_cb2(void *data)
228 {
229 }
230
231 static void test_cb1(void *data)
232 {
233 }
234
235 void *thr_writer(void *data)
236 {
237 unsigned long wtidx = (unsigned long)data;
238 struct test_array *new, *old = NULL;
239 int ret;
240
241 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
242 "writer", pthread_self(), (unsigned long)gettid());
243
244 set_affinity();
245
246 ret = rcu_defer_register_thread();
247 if (ret) {
248 printf("Error in rcu_defer_register_thread\n");
249 exit(-1);
250 }
251
252 while (!test_go)
253 {
254 }
255 cmm_smp_mb();
256
257 for (;;) {
258 new = malloc(sizeof(*new));
259 new->a = 8;
260 old = rcu_xchg_pointer(&test_rcu_pointer, new);
261 if (unlikely(wduration))
262 loop_sleep(wduration);
263 defer_rcu(free, old);
264 defer_rcu(test_cb1, old);
265 defer_rcu(test_cb1, (void *)-2L);
266 defer_rcu(test_cb1, (void *)-2L);
267 defer_rcu(test_cb1, old);
268 defer_rcu(test_cb2, (void *)-2L);
269 defer_rcu(test_cb2, (void *)-4L);
270 defer_rcu(test_cb2, (void *)-2L);
271 nr_writes++;
272 if (unlikely(!test_duration_write()))
273 break;
274 if (unlikely(wdelay))
275 loop_sleep(wdelay);
276 }
277
278 rcu_defer_unregister_thread();
279
280 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
281 "writer", pthread_self(), (unsigned long)gettid());
282 tot_nr_writes[wtidx] = nr_writes;
283 return ((void*)2);
284 }
285
286 void show_usage(int argc, char **argv)
287 {
288 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
289 #ifdef DEBUG_YIELD
290 printf(" [-r] [-w] (yield reader and/or writer)");
291 #endif
292 printf(" [-d delay] (writer period (us))");
293 printf(" [-c duration] (reader C.S. duration (in loops))");
294 printf(" [-e duration] (writer C.S. duration (in loops))");
295 printf(" [-v] (verbose output)");
296 printf(" [-a cpu#] [-a cpu#]... (affinity)");
297 printf("\n");
298 }
299
300 int main(int argc, char **argv)
301 {
302 int err;
303 pthread_t *tid_reader, *tid_writer;
304 void *tret;
305 unsigned long long *count_reader;
306 unsigned long long tot_reads = 0, tot_writes = 0;
307 int i, a;
308
309 if (argc < 4) {
310 show_usage(argc, argv);
311 return -1;
312 }
313
314 err = sscanf(argv[1], "%u", &nr_readers);
315 if (err != 1) {
316 show_usage(argc, argv);
317 return -1;
318 }
319
320 err = sscanf(argv[2], "%u", &nr_writers);
321 if (err != 1) {
322 show_usage(argc, argv);
323 return -1;
324 }
325
326 err = sscanf(argv[3], "%lu", &duration);
327 if (err != 1) {
328 show_usage(argc, argv);
329 return -1;
330 }
331
332 for (i = 4; i < argc; i++) {
333 if (argv[i][0] != '-')
334 continue;
335 switch (argv[i][1]) {
336 #ifdef DEBUG_YIELD
337 case 'r':
338 yield_active |= YIELD_READ;
339 break;
340 case 'w':
341 yield_active |= YIELD_WRITE;
342 break;
343 #endif
344 case 'a':
345 if (argc < i + 2) {
346 show_usage(argc, argv);
347 return -1;
348 }
349 a = atoi(argv[++i]);
350 cpu_affinities[next_aff++] = a;
351 use_affinity = 1;
352 printf_verbose("Adding CPU %d affinity\n", a);
353 break;
354 case 'c':
355 if (argc < i + 2) {
356 show_usage(argc, argv);
357 return -1;
358 }
359 rduration = atol(argv[++i]);
360 break;
361 case 'd':
362 if (argc < i + 2) {
363 show_usage(argc, argv);
364 return -1;
365 }
366 wdelay = atol(argv[++i]);
367 break;
368 case 'e':
369 if (argc < i + 2) {
370 show_usage(argc, argv);
371 return -1;
372 }
373 wduration = atol(argv[++i]);
374 break;
375 case 'v':
376 verbose_mode = 1;
377 break;
378 }
379 }
380
381 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
382 duration, nr_readers, nr_writers);
383 printf_verbose("Writer delay : %lu loops.\n", wdelay);
384 printf_verbose("Reader duration : %lu loops.\n", rduration);
385 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
386 "main", pthread_self(), (unsigned long)gettid());
387
388 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
389 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
390 count_reader = malloc(sizeof(*count_reader) * nr_readers);
391 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
392
393 next_aff = 0;
394
395 for (i = 0; i < nr_readers; i++) {
396 err = pthread_create(&tid_reader[i], NULL, thr_reader,
397 &count_reader[i]);
398 if (err != 0)
399 exit(1);
400 }
401 for (i = 0; i < nr_writers; i++) {
402 err = pthread_create(&tid_writer[i], NULL, thr_writer,
403 (void *)(long)i);
404 if (err != 0)
405 exit(1);
406 }
407
408 cmm_smp_mb();
409
410 test_go = 1;
411
412 sleep(duration);
413
414 test_stop = 1;
415
416 for (i = 0; i < nr_readers; i++) {
417 err = pthread_join(tid_reader[i], &tret);
418 if (err != 0)
419 exit(1);
420 tot_reads += count_reader[i];
421 }
422 for (i = 0; i < nr_writers; i++) {
423 err = pthread_join(tid_writer[i], &tret);
424 if (err != 0)
425 exit(1);
426 tot_writes += tot_nr_writes[i];
427 }
428
429 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
430 tot_writes);
431 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
432 "nr_writers %3u "
433 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
434 argv[0], duration, nr_readers, rduration, wduration,
435 nr_writers, wdelay, tot_reads, tot_writes,
436 tot_reads + tot_writes);
437 free(tid_reader);
438 free(tid_writer);
439 free(count_reader);
440 free(tot_nr_writes);
441
442 return 0;
443 }
This page took 0.038266 seconds and 4 git commands to generate.