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