fix: uatomic_set return value compile fix for non-x86 arch.
[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 #include <urcu/tls-compat.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 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 l)
89 {
90 while(l-- != 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 #ifndef HAVE_CPU_SET_T
109 typedef unsigned long cpu_set_t;
110 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
111 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
112 #endif
113
114 static void set_affinity(void)
115 {
116 cpu_set_t mask;
117 int cpu;
118 int ret;
119
120 if (!use_affinity)
121 return;
122
123 #if HAVE_SCHED_SETAFFINITY
124 ret = pthread_mutex_lock(&affinity_mutex);
125 if (ret) {
126 perror("Error in pthread mutex lock");
127 exit(-1);
128 }
129 cpu = cpu_affinities[next_aff++];
130 ret = pthread_mutex_unlock(&affinity_mutex);
131 if (ret) {
132 perror("Error in pthread mutex unlock");
133 exit(-1);
134 }
135
136 CPU_ZERO(&mask);
137 CPU_SET(cpu, &mask);
138 #if SCHED_SETAFFINITY_ARGS == 2
139 sched_setaffinity(0, &mask);
140 #else
141 sched_setaffinity(0, sizeof(mask), &mask);
142 #endif
143 #endif /* HAVE_SCHED_SETAFFINITY */
144 }
145
146 /*
147 * returns 0 if test should end.
148 */
149 static int test_duration_write(void)
150 {
151 return !test_stop;
152 }
153
154 static int test_duration_read(void)
155 {
156 return !test_stop;
157 }
158
159 static DEFINE_URCU_TLS(unsigned long long, nr_writes);
160 static DEFINE_URCU_TLS(unsigned long long, nr_reads);
161
162 static
163 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
164
165 static unsigned int nr_readers;
166 static unsigned int nr_writers;
167
168 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
169
170 void rcu_copy_mutex_lock(void)
171 {
172 int ret;
173 ret = pthread_mutex_lock(&rcu_copy_mutex);
174 if (ret) {
175 perror("Error in pthread mutex lock");
176 exit(-1);
177 }
178 }
179
180 void rcu_copy_mutex_unlock(void)
181 {
182 int ret;
183
184 ret = pthread_mutex_unlock(&rcu_copy_mutex);
185 if (ret) {
186 perror("Error in pthread mutex unlock");
187 exit(-1);
188 }
189 }
190
191 void *thr_reader(void *_count)
192 {
193 unsigned long long *count = _count;
194 struct test_array *local_ptr;
195
196 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
197 "reader", pthread_self(), (unsigned long)gettid());
198
199 set_affinity();
200
201 rcu_register_thread();
202
203 while (!test_go)
204 {
205 }
206 cmm_smp_mb();
207
208 for (;;) {
209 rcu_read_lock();
210 local_ptr = rcu_dereference(test_rcu_pointer);
211 debug_yield_read();
212 if (local_ptr)
213 assert(local_ptr->a == 8);
214 if (caa_unlikely(rduration))
215 loop_sleep(rduration);
216 rcu_read_unlock();
217 URCU_TLS(nr_reads)++;
218 if (caa_unlikely(!test_duration_read()))
219 break;
220 }
221
222 rcu_unregister_thread();
223
224 *count = URCU_TLS(nr_reads);
225 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
226 "reader", pthread_self(), (unsigned long)gettid());
227 return ((void*)1);
228
229 }
230
231 static void test_cb2(void *data)
232 {
233 }
234
235 static void test_cb1(void *data)
236 {
237 }
238
239 void *thr_writer(void *data)
240 {
241 unsigned long wtidx = (unsigned long)data;
242 struct test_array *new, *old = NULL;
243 int ret;
244
245 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
246 "writer", pthread_self(), (unsigned long)gettid());
247
248 set_affinity();
249
250 ret = rcu_defer_register_thread();
251 if (ret) {
252 printf("Error in rcu_defer_register_thread\n");
253 exit(-1);
254 }
255
256 while (!test_go)
257 {
258 }
259 cmm_smp_mb();
260
261 for (;;) {
262 new = malloc(sizeof(*new));
263 new->a = 8;
264 old = rcu_xchg_pointer(&test_rcu_pointer, new);
265 if (caa_unlikely(wduration))
266 loop_sleep(wduration);
267 defer_rcu(free, old);
268 defer_rcu(test_cb1, old);
269 defer_rcu(test_cb1, (void *)-2L);
270 defer_rcu(test_cb1, (void *)-2L);
271 defer_rcu(test_cb1, old);
272 defer_rcu(test_cb2, (void *)-2L);
273 defer_rcu(test_cb2, (void *)-4L);
274 defer_rcu(test_cb2, (void *)-2L);
275 URCU_TLS(nr_writes)++;
276 if (caa_unlikely(!test_duration_write()))
277 break;
278 if (caa_unlikely(wdelay))
279 loop_sleep(wdelay);
280 }
281
282 rcu_defer_unregister_thread();
283
284 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
285 "writer", pthread_self(), (unsigned long)gettid());
286 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
287 return ((void*)2);
288 }
289
290 void show_usage(int argc, char **argv)
291 {
292 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
293 #ifdef DEBUG_YIELD
294 printf(" [-r] [-w] (yield reader and/or writer)");
295 #endif
296 printf(" [-d delay] (writer period (us))");
297 printf(" [-c duration] (reader C.S. duration (in loops))");
298 printf(" [-e duration] (writer C.S. duration (in loops))");
299 printf(" [-v] (verbose output)");
300 printf(" [-a cpu#] [-a cpu#]... (affinity)");
301 printf("\n");
302 }
303
304 int main(int argc, char **argv)
305 {
306 int err;
307 pthread_t *tid_reader, *tid_writer;
308 void *tret;
309 unsigned long long *count_reader;
310 unsigned long long tot_reads = 0, tot_writes = 0;
311 int i, a;
312
313 if (argc < 4) {
314 show_usage(argc, argv);
315 return -1;
316 }
317
318 err = sscanf(argv[1], "%u", &nr_readers);
319 if (err != 1) {
320 show_usage(argc, argv);
321 return -1;
322 }
323
324 err = sscanf(argv[2], "%u", &nr_writers);
325 if (err != 1) {
326 show_usage(argc, argv);
327 return -1;
328 }
329
330 err = sscanf(argv[3], "%lu", &duration);
331 if (err != 1) {
332 show_usage(argc, argv);
333 return -1;
334 }
335
336 for (i = 4; i < argc; i++) {
337 if (argv[i][0] != '-')
338 continue;
339 switch (argv[i][1]) {
340 #ifdef DEBUG_YIELD
341 case 'r':
342 yield_active |= YIELD_READ;
343 break;
344 case 'w':
345 yield_active |= YIELD_WRITE;
346 break;
347 #endif
348 case 'a':
349 if (argc < i + 2) {
350 show_usage(argc, argv);
351 return -1;
352 }
353 a = atoi(argv[++i]);
354 cpu_affinities[next_aff++] = a;
355 use_affinity = 1;
356 printf_verbose("Adding CPU %d affinity\n", a);
357 break;
358 case 'c':
359 if (argc < i + 2) {
360 show_usage(argc, argv);
361 return -1;
362 }
363 rduration = atol(argv[++i]);
364 break;
365 case 'd':
366 if (argc < i + 2) {
367 show_usage(argc, argv);
368 return -1;
369 }
370 wdelay = atol(argv[++i]);
371 break;
372 case 'e':
373 if (argc < i + 2) {
374 show_usage(argc, argv);
375 return -1;
376 }
377 wduration = atol(argv[++i]);
378 break;
379 case 'v':
380 verbose_mode = 1;
381 break;
382 }
383 }
384
385 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
386 duration, nr_readers, nr_writers);
387 printf_verbose("Writer delay : %lu loops.\n", wdelay);
388 printf_verbose("Reader duration : %lu loops.\n", rduration);
389 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
390 "main", pthread_self(), (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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