Fix: membarrier fallback symbol conflict
[urcu.git] / tests / test_perthreadlock.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6982d6d7 6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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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
9e97e478 23#define _GNU_SOURCE
d8540fc5 24#include "../config.h"
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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>
94b343fd 34#include <errno.h>
0ee8bb0a 35
ec4e58a3 36#include <urcu/arch.h>
bd252a04 37#include <urcu/tls-compat.h>
2953b501 38#include "cpuset.h"
0ee8bb0a 39
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40#ifdef __linux__
41#include <syscall.h>
42#endif
43
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44/* hardcoded number of CPUs */
45#define NR_CPUS 16384
46
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47#if defined(_syscall0)
48_syscall0(pid_t, gettid)
49#elif defined(__NR_gettid)
50static inline pid_t gettid(void)
51{
52 return syscall(__NR_gettid);
53}
54#else
55#warning "use pid as tid"
56static 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
ec4e58a3 67#include <urcu.h>
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68
69struct test_array {
70 int a;
71};
72
73struct per_thread_lock {
74 pthread_mutex_t lock;
06f22bdb 75} __attribute__((aligned(CAA_CACHE_LINE_SIZE))); /* cache-line aligned */
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76
77static struct per_thread_lock *per_thread_lock;
78
78efb485 79static volatile int test_go, test_stop;
0ee8bb0a 80
9e31d0f0 81static unsigned long wdelay;
0ee8bb0a 82
2b4e4125 83static volatile struct test_array test_array = { 8 };
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84
85static unsigned long duration;
0ee8bb0a 86
daddf5b0 87/* read-side C.S. duration, in loops */
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88static unsigned long rduration;
89
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90/* write-side C.S. duration, in loops */
91static unsigned long wduration;
92
ab0aacbe 93static inline void loop_sleep(unsigned long loops)
daddf5b0 94{
ab0aacbe 95 while (loops-- != 0)
06f22bdb 96 caa_cpu_relax();
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97}
98
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99static int verbose_mode;
100
101#define printf_verbose(fmt, args...) \
102 do { \
103 if (verbose_mode) \
104 printf(fmt, args); \
105 } while (0)
106
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107static unsigned int cpu_affinities[NR_CPUS];
108static unsigned int next_aff = 0;
109static int use_affinity = 0;
110
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111pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
112
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113static void set_affinity(void)
114{
95bc7fb9 115#if HAVE_SCHED_SETAFFINITY
2a7ac59d 116 cpu_set_t mask;
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117 int cpu, ret;
118#endif /* HAVE_SCHED_SETAFFINITY */
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119
120 if (!use_affinity)
121 return;
122
d8540fc5 123#if HAVE_SCHED_SETAFFINITY
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124 ret = pthread_mutex_lock(&affinity_mutex);
125 if (ret) {
126 perror("Error in pthread mutex lock");
127 exit(-1);
128 }
2a7ac59d 129 cpu = cpu_affinities[next_aff++];
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130 ret = pthread_mutex_unlock(&affinity_mutex);
131 if (ret) {
132 perror("Error in pthread mutex unlock");
133 exit(-1);
134 }
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135 CPU_ZERO(&mask);
136 CPU_SET(cpu, &mask);
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137#if SCHED_SETAFFINITY_ARGS == 2
138 sched_setaffinity(0, &mask);
139#else
2a7ac59d 140 sched_setaffinity(0, sizeof(mask), &mask);
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141#endif
142#endif /* HAVE_SCHED_SETAFFINITY */
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143}
144
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145/*
146 * returns 0 if test should end.
147 */
148static int test_duration_write(void)
149{
78efb485 150 return !test_stop;
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151}
152
153static int test_duration_read(void)
154{
78efb485 155 return !test_stop;
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156}
157
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158static DEFINE_URCU_TLS(unsigned long long, nr_writes);
159static DEFINE_URCU_TLS(unsigned long long, nr_reads);
0ee8bb0a 160
55271c13 161static
06f22bdb 162unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13 163static
06f22bdb 164unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
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165
166static unsigned int nr_readers;
167static unsigned int nr_writers;
168
169pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
170
171void rcu_copy_mutex_lock(void)
172{
173 int ret;
174 ret = pthread_mutex_lock(&rcu_copy_mutex);
175 if (ret) {
176 perror("Error in pthread mutex lock");
177 exit(-1);
178 }
179}
180
181void rcu_copy_mutex_unlock(void)
182{
183 int ret;
184
185 ret = pthread_mutex_unlock(&rcu_copy_mutex);
186 if (ret) {
187 perror("Error in pthread mutex unlock");
188 exit(-1);
189 }
190}
191
192void *thr_reader(void *data)
193{
194 unsigned long tidx = (unsigned long)data;
195
4bad7d45 196 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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197 "reader", (unsigned long) pthread_self(),
198 (unsigned long) gettid());
0ee8bb0a 199
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200 set_affinity();
201
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202 while (!test_go)
203 {
204 }
205
206 for (;;) {
207 pthread_mutex_lock(&per_thread_lock[tidx].lock);
208 assert(test_array.a == 8);
a0b7f7ea 209 if (caa_unlikely(rduration))
daddf5b0 210 loop_sleep(rduration);
0ee8bb0a 211 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
bd252a04 212 URCU_TLS(nr_reads)++;
a0b7f7ea 213 if (caa_unlikely(!test_duration_read()))
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214 break;
215 }
216
bd252a04 217 tot_nr_reads[tidx] = URCU_TLS(nr_reads);
cda3c71d 218 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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219 "reader", (unsigned long) pthread_self(),
220 (unsigned long) gettid());
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221 return ((void*)1);
222
223}
224
225void *thr_writer(void *data)
226{
227 unsigned long wtidx = (unsigned long)data;
228 long tidx;
229
4bad7d45 230 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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231 "writer", (unsigned long) pthread_self(),
232 (unsigned long) gettid());
0ee8bb0a 233
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234 set_affinity();
235
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236 while (!test_go)
237 {
238 }
5481ddb3 239 cmm_smp_mb();
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240
241 for (;;) {
242 for (tidx = 0; tidx < nr_readers; tidx++) {
243 pthread_mutex_lock(&per_thread_lock[tidx].lock);
244 }
2b4e4125 245 test_array.a = 0;
0ee8bb0a 246 test_array.a = 8;
a0b7f7ea 247 if (caa_unlikely(wduration))
31b598e0 248 loop_sleep(wduration);
f120cc10 249 for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
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250 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
251 }
bd252a04 252 URCU_TLS(nr_writes)++;
a0b7f7ea 253 if (caa_unlikely(!test_duration_write()))
0ee8bb0a 254 break;
a0b7f7ea 255 if (caa_unlikely(wdelay))
9e31d0f0 256 loop_sleep(wdelay);
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257 }
258
4bad7d45 259 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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260 "writer", (unsigned long) pthread_self(),
261 (unsigned long) gettid());
bd252a04 262 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
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263 return ((void*)2);
264}
265
266void show_usage(int argc, char **argv)
267{
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268 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
269 argv[0]);
270 printf("OPTIONS:\n");
0ee8bb0a 271#ifdef DEBUG_YIELD
06637138 272 printf(" [-r] [-w] (yield reader and/or writer)\n");
0ee8bb0a 273#endif
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274 printf(" [-d delay] (writer period (us))\n");
275 printf(" [-c duration] (reader C.S. duration (in loops))\n");
276 printf(" [-e duration] (writer C.S. duration (in loops))\n");
277 printf(" [-v] (verbose output)\n");
278 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
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279 printf("\n");
280}
281
282int main(int argc, char **argv)
283{
284 int err;
285 pthread_t *tid_reader, *tid_writer;
286 void *tret;
0ee8bb0a 287 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 288 int i, a;
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289
290 if (argc < 4) {
291 show_usage(argc, argv);
292 return -1;
293 }
5481ddb3 294 cmm_smp_mb();
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295
296 err = sscanf(argv[1], "%u", &nr_readers);
297 if (err != 1) {
298 show_usage(argc, argv);
299 return -1;
300 }
301
302 err = sscanf(argv[2], "%u", &nr_writers);
303 if (err != 1) {
304 show_usage(argc, argv);
305 return -1;
306 }
307
308 err = sscanf(argv[3], "%lu", &duration);
309 if (err != 1) {
310 show_usage(argc, argv);
311 return -1;
312 }
313
314 for (i = 4; i < argc; i++) {
315 if (argv[i][0] != '-')
316 continue;
317 switch (argv[i][1]) {
318#ifdef DEBUG_YIELD
319 case 'r':
320 yield_active |= YIELD_READ;
321 break;
322 case 'w':
323 yield_active |= YIELD_WRITE;
324 break;
325#endif
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326 case 'a':
327 if (argc < i + 2) {
328 show_usage(argc, argv);
329 return -1;
330 }
331 a = atoi(argv[++i]);
2a7ac59d 332 cpu_affinities[next_aff++] = a;
9e97e478 333 use_affinity = 1;
4bad7d45 334 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 335 break;
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336 case 'c':
337 if (argc < i + 2) {
338 show_usage(argc, argv);
339 return -1;
340 }
9e31d0f0 341 rduration = atol(argv[++i]);
8b632bab 342 break;
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343 case 'd':
344 if (argc < i + 2) {
345 show_usage(argc, argv);
346 return -1;
347 }
9e31d0f0 348 wdelay = atol(argv[++i]);
0ee8bb0a 349 break;
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350 case 'e':
351 if (argc < i + 2) {
352 show_usage(argc, argv);
353 return -1;
354 }
355 wduration = atol(argv[++i]);
356 break;
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357 case 'v':
358 verbose_mode = 1;
359 break;
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360 }
361 }
362
4bad7d45 363 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a 364 duration, nr_readers, nr_writers);
9e31d0f0 365 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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366 printf_verbose("Reader duration : %lu loops.\n", rduration);
367 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
6ff854ac 368 "main", (unsigned long) pthread_self(), (unsigned long) gettid());
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369
370 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
371 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
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372 tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
373 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
374 per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers);
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375 for (i = 0; i < nr_readers; i++) {
376 err = pthread_mutex_init(&per_thread_lock[i].lock, NULL);
377 if (err != 0)
378 exit(1);
379 }
0ee8bb0a 380
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381 next_aff = 0;
382
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383 for (i = 0; i < nr_readers; i++) {
384 err = pthread_create(&tid_reader[i], NULL, thr_reader,
385 (void *)(long)i);
386 if (err != 0)
387 exit(1);
388 }
389 for (i = 0; i < nr_writers; i++) {
390 err = pthread_create(&tid_writer[i], NULL, thr_writer,
391 (void *)(long)i);
392 if (err != 0)
393 exit(1);
394 }
395
5481ddb3 396 cmm_smp_mb();
0ee8bb0a 397
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398 test_go = 1;
399
400 sleep(duration);
401
402 test_stop = 1;
403
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404 for (i = 0; i < nr_readers; i++) {
405 err = pthread_join(tid_reader[i], &tret);
406 if (err != 0)
407 exit(1);
408 tot_reads += tot_nr_reads[i];
409 }
410 for (i = 0; i < nr_writers; i++) {
411 err = pthread_join(tid_writer[i], &tret);
412 if (err != 0)
413 exit(1);
414 tot_writes += tot_nr_writes[i];
415 }
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416
417 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a 418 tot_writes);
a50a7b43 419 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 420 "nr_writers %3u "
9e31d0f0 421 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 422 argv[0], duration, nr_readers, rduration, wduration,
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423 nr_writers, wdelay, tot_reads, tot_writes,
424 tot_reads + tot_writes);
425
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426 free(tid_reader);
427 free(tid_writer);
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428 free(tot_nr_reads);
429 free(tot_nr_writes);
430 free(per_thread_lock);
431 return 0;
432}
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