Remove bogus ; from defines
[urcu.git] / tests / test_rwlock.c
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1/*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
5 *
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
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
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24#include <stdio.h>
25#include <pthread.h>
26#include <stdlib.h>
27#include <string.h>
28#include <sys/types.h>
29#include <sys/wait.h>
30#include <unistd.h>
31#include <stdio.h>
32#include <assert.h>
33#include <sys/syscall.h>
9e97e478 34#include <sched.h>
94b343fd 35#include <errno.h>
10c48e14 36
ec4e58a3 37#include <urcu/arch.h>
7685d963 38
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39/* hardcoded number of CPUs */
40#define NR_CPUS 16384
41
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42#if defined(_syscall0)
43_syscall0(pid_t, gettid)
44#elif defined(__NR_gettid)
45static inline pid_t gettid(void)
46{
47 return syscall(__NR_gettid);
48}
49#else
50#warning "use pid as tid"
51static inline pid_t gettid(void)
52{
53 return getpid();
54}
55#endif
56
57#ifndef DYNAMIC_LINK_TEST
58#define _LGPL_SOURCE
59#else
60#define debug_yield_read()
61#endif
ec4e58a3 62#include <urcu.h>
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63
64struct test_array {
65 int a;
66};
67
68pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
69
78efb485 70static volatile int test_go, test_stop;
10c48e14 71
9e31d0f0 72static unsigned long wdelay;
10c48e14 73
2b4e4125 74static volatile struct test_array test_array = { 8 };
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75
76static unsigned long duration;
10c48e14 77
daddf5b0 78/* read-side C.S. duration, in loops */
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79static unsigned long rduration;
80
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81static inline void loop_sleep(unsigned long l)
82{
83 while(l-- != 0)
84 cpu_relax();
85}
86
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87static int verbose_mode;
88
89#define printf_verbose(fmt, args...) \
90 do { \
91 if (verbose_mode) \
92 printf(fmt, args); \
93 } while (0)
94
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95static unsigned int cpu_affinities[NR_CPUS];
96static unsigned int next_aff = 0;
97static int use_affinity = 0;
98
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99pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
100
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101static void set_affinity(void)
102{
103 cpu_set_t mask;
104 int cpu;
6af882ba 105 int ret;
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106
107 if (!use_affinity)
108 return;
109
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110 ret = pthread_mutex_lock(&affinity_mutex);
111 if (ret) {
112 perror("Error in pthread mutex lock");
113 exit(-1);
114 }
2a7ac59d 115 cpu = cpu_affinities[next_aff++];
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116 ret = pthread_mutex_unlock(&affinity_mutex);
117 if (ret) {
118 perror("Error in pthread mutex unlock");
119 exit(-1);
120 }
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121 CPU_ZERO(&mask);
122 CPU_SET(cpu, &mask);
123 sched_setaffinity(0, sizeof(mask), &mask);
124}
125
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126/*
127 * returns 0 if test should end.
128 */
129static int test_duration_write(void)
130{
78efb485 131 return !test_stop;
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132}
133
134static int test_duration_read(void)
135{
78efb485 136 return !test_stop;
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137}
138
139static unsigned long long __thread nr_writes;
140static unsigned long long __thread nr_reads;
141
142static unsigned int nr_readers;
143static unsigned int nr_writers;
144
145pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
146
147void rcu_copy_mutex_lock(void)
148{
149 int ret;
150 ret = pthread_mutex_lock(&rcu_copy_mutex);
151 if (ret) {
152 perror("Error in pthread mutex lock");
153 exit(-1);
154 }
155}
156
157void rcu_copy_mutex_unlock(void)
158{
159 int ret;
160
161 ret = pthread_mutex_unlock(&rcu_copy_mutex);
162 if (ret) {
163 perror("Error in pthread mutex unlock");
164 exit(-1);
165 }
166}
167
168void *thr_reader(void *_count)
169{
170 unsigned long long *count = _count;
171
4bad7d45 172 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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173 "reader", pthread_self(), (unsigned long)gettid());
174
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175 set_affinity();
176
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177 while (!test_go)
178 {
179 }
180
181 for (;;) {
182 pthread_rwlock_rdlock(&lock);
183 assert(test_array.a == 8);
8b632bab 184 if (unlikely(rduration))
daddf5b0 185 loop_sleep(rduration);
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186 pthread_rwlock_unlock(&lock);
187 nr_reads++;
59d5a406 188 if (unlikely(!test_duration_read()))
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189 break;
190 }
191
192 *count = nr_reads;
4bad7d45 193 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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194 "reader", pthread_self(), (unsigned long)gettid());
195 return ((void*)1);
196
197}
198
199void *thr_writer(void *_count)
200{
201 unsigned long long *count = _count;
202
4bad7d45 203 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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204 "writer", pthread_self(), (unsigned long)gettid());
205
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206 set_affinity();
207
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208 while (!test_go)
209 {
210 }
7685d963 211 smp_mb();
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212
213 for (;;) {
214 pthread_rwlock_wrlock(&lock);
2b4e4125 215 test_array.a = 0;
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216 test_array.a = 8;
217 pthread_rwlock_unlock(&lock);
218 nr_writes++;
59d5a406 219 if (unlikely(!test_duration_write()))
10c48e14 220 break;
59d5a406 221 if (unlikely(wdelay))
9e31d0f0 222 loop_sleep(wdelay);
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223 }
224
4bad7d45 225 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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226 "writer", pthread_self(), (unsigned long)gettid());
227 *count = nr_writes;
228 return ((void*)2);
229}
230
231void show_usage(int argc, char **argv)
232{
233 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
234#ifdef DEBUG_YIELD
235 printf(" [-r] [-w] (yield reader and/or writer)");
236#endif
7685d963 237 printf(" [-d delay] (writer period (us))");
daddf5b0 238 printf(" [-c duration] (reader C.S. duration (in loops))");
4bad7d45 239 printf(" [-v] (verbose output)");
9e97e478 240 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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241 printf("\n");
242}
243
244int main(int argc, char **argv)
245{
246 int err;
247 pthread_t *tid_reader, *tid_writer;
248 void *tret;
249 unsigned long long *count_reader, *count_writer;
250 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 251 int i, a;
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252
253 if (argc < 4) {
254 show_usage(argc, argv);
255 return -1;
256 }
7685d963 257 smp_mb();
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258
259 err = sscanf(argv[1], "%u", &nr_readers);
260 if (err != 1) {
261 show_usage(argc, argv);
262 return -1;
263 }
264
265 err = sscanf(argv[2], "%u", &nr_writers);
266 if (err != 1) {
267 show_usage(argc, argv);
268 return -1;
269 }
270
271 err = sscanf(argv[3], "%lu", &duration);
272 if (err != 1) {
273 show_usage(argc, argv);
274 return -1;
275 }
276
277 for (i = 4; i < argc; i++) {
278 if (argv[i][0] != '-')
279 continue;
280 switch (argv[i][1]) {
281#ifdef DEBUG_YIELD
282 case 'r':
283 yield_active |= YIELD_READ;
284 break;
285 case 'w':
286 yield_active |= YIELD_WRITE;
287 break;
288#endif
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289 case 'a':
290 if (argc < i + 2) {
291 show_usage(argc, argv);
292 return -1;
293 }
294 a = atoi(argv[++i]);
2a7ac59d 295 cpu_affinities[next_aff++] = a;
9e97e478 296 use_affinity = 1;
4bad7d45 297 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 298 break;
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299 case 'c':
300 if (argc < i + 2) {
301 show_usage(argc, argv);
302 return -1;
303 }
9e31d0f0 304 rduration = atol(argv[++i]);
8b632bab 305 break;
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306 case 'd':
307 if (argc < i + 2) {
308 show_usage(argc, argv);
309 return -1;
310 }
9e31d0f0 311 wdelay = atol(argv[++i]);
10c48e14 312 break;
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313 case 'v':
314 verbose_mode = 1;
315 break;
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316 }
317 }
318
4bad7d45 319 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
10c48e14 320 duration, nr_readers, nr_writers);
9e31d0f0 321 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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322 printf_verbose("Reader duration : %lu loops.\n", rduration);
323 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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324 "main", pthread_self(), (unsigned long)gettid());
325
326 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
327 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
328 count_reader = malloc(sizeof(*count_reader) * nr_readers);
329 count_writer = malloc(sizeof(*count_writer) * nr_writers);
330
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331 next_aff = 0;
332
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333 for (i = 0; i < nr_readers; i++) {
334 err = pthread_create(&tid_reader[i], NULL, thr_reader,
335 &count_reader[i]);
336 if (err != 0)
337 exit(1);
338 }
339 for (i = 0; i < nr_writers; i++) {
340 err = pthread_create(&tid_writer[i], NULL, thr_writer,
341 &count_writer[i]);
342 if (err != 0)
343 exit(1);
344 }
345
7685d963 346 smp_mb();
10c48e14 347
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348 test_go = 1;
349
350 sleep(duration);
351
352 test_stop = 1;
353
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354 for (i = 0; i < nr_readers; i++) {
355 err = pthread_join(tid_reader[i], &tret);
356 if (err != 0)
357 exit(1);
358 tot_reads += count_reader[i];
359 }
360 for (i = 0; i < nr_writers; i++) {
361 err = pthread_join(tid_writer[i], &tret);
362 if (err != 0)
363 exit(1);
364 tot_writes += count_writer[i];
365 }
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366
367 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
10c48e14 368 tot_writes);
6a190115 369 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
cda3c71d 370 "nr_writers %3u "
9e31d0f0 371 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
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372 argv[0], duration, nr_readers, rduration,
373 nr_writers, wdelay, tot_reads, tot_writes,
374 tot_reads + tot_writes);
375
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376 free(tid_reader);
377 free(tid_writer);
378 free(count_reader);
379 free(count_writer);
380 return 0;
381}
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