rculfstack: header implementation should be defined as static inline
[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 <sched.h>
35 #include <errno.h>
36
37 #include <urcu/arch.h>
38
39 #ifdef __linux__
40 #include <syscall.h>
41 #endif
42
43 /* hardcoded number of CPUs */
44 #define NR_CPUS 16384
45
46 #if defined(_syscall0)
47 _syscall0(pid_t, gettid)
48 #elif defined(__NR_gettid)
49 static inline pid_t gettid(void)
50 {
51 return syscall(__NR_gettid);
52 }
53 #else
54 #warning "use pid as tid"
55 static inline pid_t gettid(void)
56 {
57 return getpid();
58 }
59 #endif
60
61 #ifndef DYNAMIC_LINK_TEST
62 #define _LGPL_SOURCE
63 #else
64 #define debug_yield_read()
65 #endif
66 #include <urcu.h>
67 #include <urcu-defer.h>
68
69 struct test_array {
70 int a;
71 };
72
73 static volatile int test_go, test_stop;
74
75 static unsigned long wdelay;
76
77 static struct test_array *test_rcu_pointer;
78
79 static unsigned long duration;
80
81 /* read-side C.S. duration, in loops */
82 static unsigned long rduration;
83
84 /* write-side C.S. duration, in loops */
85 static unsigned long wduration;
86
87 static inline void loop_sleep(unsigned long l)
88 {
89 while(l-- != 0)
90 caa_cpu_relax();
91 }
92
93 static int verbose_mode;
94
95 #define printf_verbose(fmt, args...) \
96 do { \
97 if (verbose_mode) \
98 printf(fmt, args); \
99 } while (0)
100
101 static unsigned int cpu_affinities[NR_CPUS];
102 static unsigned int next_aff = 0;
103 static int use_affinity = 0;
104
105 pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
106
107 #ifndef HAVE_CPU_SET_T
108 typedef unsigned long cpu_set_t;
109 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
110 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
111 #endif
112
113 static void set_affinity(void)
114 {
115 cpu_set_t mask;
116 int cpu;
117 int ret;
118
119 if (!use_affinity)
120 return;
121
122 #if HAVE_SCHED_SETAFFINITY
123 ret = pthread_mutex_lock(&affinity_mutex);
124 if (ret) {
125 perror("Error in pthread mutex lock");
126 exit(-1);
127 }
128 cpu = cpu_affinities[next_aff++];
129 ret = pthread_mutex_unlock(&affinity_mutex);
130 if (ret) {
131 perror("Error in pthread mutex unlock");
132 exit(-1);
133 }
134
135 CPU_ZERO(&mask);
136 CPU_SET(cpu, &mask);
137 #if SCHED_SETAFFINITY_ARGS == 2
138 sched_setaffinity(0, &mask);
139 #else
140 sched_setaffinity(0, sizeof(mask), &mask);
141 #endif
142 #endif /* HAVE_SCHED_SETAFFINITY */
143 }
144
145 /*
146 * returns 0 if test should end.
147 */
148 static int test_duration_write(void)
149 {
150 return !test_stop;
151 }
152
153 static int test_duration_read(void)
154 {
155 return !test_stop;
156 }
157
158 static unsigned long long __thread nr_writes;
159 static unsigned long long __thread nr_reads;
160
161 static
162 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
163
164 static unsigned int nr_readers;
165 static unsigned int nr_writers;
166
167 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
168
169 void rcu_copy_mutex_lock(void)
170 {
171 int ret;
172 ret = pthread_mutex_lock(&rcu_copy_mutex);
173 if (ret) {
174 perror("Error in pthread mutex lock");
175 exit(-1);
176 }
177 }
178
179 void rcu_copy_mutex_unlock(void)
180 {
181 int ret;
182
183 ret = pthread_mutex_unlock(&rcu_copy_mutex);
184 if (ret) {
185 perror("Error in pthread mutex unlock");
186 exit(-1);
187 }
188 }
189
190 void *thr_reader(void *_count)
191 {
192 unsigned long long *count = _count;
193 struct test_array *local_ptr;
194
195 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
196 "reader", pthread_self(), (unsigned long)gettid());
197
198 set_affinity();
199
200 rcu_register_thread();
201
202 while (!test_go)
203 {
204 }
205 cmm_smp_mb();
206
207 for (;;) {
208 rcu_read_lock();
209 local_ptr = rcu_dereference(test_rcu_pointer);
210 debug_yield_read();
211 if (local_ptr)
212 assert(local_ptr->a == 8);
213 if (unlikely(rduration))
214 loop_sleep(rduration);
215 rcu_read_unlock();
216 nr_reads++;
217 if (unlikely(!test_duration_read()))
218 break;
219 }
220
221 rcu_unregister_thread();
222
223 *count = nr_reads;
224 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
225 "reader", pthread_self(), (unsigned long)gettid());
226 return ((void*)1);
227
228 }
229
230 static void test_cb2(void *data)
231 {
232 }
233
234 static void test_cb1(void *data)
235 {
236 }
237
238 void *thr_writer(void *data)
239 {
240 unsigned long wtidx = (unsigned long)data;
241 struct test_array *new, *old = NULL;
242 int ret;
243
244 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
245 "writer", pthread_self(), (unsigned long)gettid());
246
247 set_affinity();
248
249 ret = rcu_defer_register_thread();
250 if (ret) {
251 printf("Error in rcu_defer_register_thread\n");
252 exit(-1);
253 }
254
255 while (!test_go)
256 {
257 }
258 cmm_smp_mb();
259
260 for (;;) {
261 new = malloc(sizeof(*new));
262 new->a = 8;
263 old = rcu_xchg_pointer(&test_rcu_pointer, new);
264 if (unlikely(wduration))
265 loop_sleep(wduration);
266 defer_rcu(free, old);
267 defer_rcu(test_cb1, old);
268 defer_rcu(test_cb1, (void *)-2L);
269 defer_rcu(test_cb1, (void *)-2L);
270 defer_rcu(test_cb1, old);
271 defer_rcu(test_cb2, (void *)-2L);
272 defer_rcu(test_cb2, (void *)-4L);
273 defer_rcu(test_cb2, (void *)-2L);
274 nr_writes++;
275 if (unlikely(!test_duration_write()))
276 break;
277 if (unlikely(wdelay))
278 loop_sleep(wdelay);
279 }
280
281 rcu_defer_unregister_thread();
282
283 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
284 "writer", pthread_self(), (unsigned long)gettid());
285 tot_nr_writes[wtidx] = 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 yield_active |= YIELD_READ;
342 break;
343 case 'w':
344 yield_active |= 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", pthread_self(), (unsigned long)gettid());
390
391 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
392 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
393 count_reader = malloc(sizeof(*count_reader) * nr_readers);
394 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
395
396 next_aff = 0;
397
398 for (i = 0; i < nr_readers; i++) {
399 err = pthread_create(&tid_reader[i], NULL, thr_reader,
400 &count_reader[i]);
401 if (err != 0)
402 exit(1);
403 }
404 for (i = 0; i < nr_writers; i++) {
405 err = pthread_create(&tid_writer[i], NULL, thr_writer,
406 (void *)(long)i);
407 if (err != 0)
408 exit(1);
409 }
410
411 cmm_smp_mb();
412
413 test_go = 1;
414
415 sleep(duration);
416
417 test_stop = 1;
418
419 for (i = 0; i < nr_readers; i++) {
420 err = pthread_join(tid_reader[i], &tret);
421 if (err != 0)
422 exit(1);
423 tot_reads += count_reader[i];
424 }
425 for (i = 0; i < nr_writers; i++) {
426 err = pthread_join(tid_writer[i], &tret);
427 if (err != 0)
428 exit(1);
429 tot_writes += tot_nr_writes[i];
430 }
431
432 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
433 tot_writes);
434 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
435 "nr_writers %3u "
436 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
437 argv[0], duration, nr_readers, rduration, wduration,
438 nr_writers, wdelay, tot_reads, tot_writes,
439 tot_reads + tot_writes);
440 free(tid_reader);
441 free(tid_writer);
442 free(count_reader);
443 free(tot_nr_writes);
444
445 return 0;
446 }
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