Test fix: test_perthreadlock uninitialized mutex
[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>
9e97e478 34#include <sched.h>
94b343fd 35#include <errno.h>
0ee8bb0a 36
ec4e58a3 37#include <urcu/arch.h>
bd252a04 38#include <urcu/tls-compat.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
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93static inline void loop_sleep(unsigned long l)
94{
95 while(l-- != 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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113#ifndef HAVE_CPU_SET_T
114typedef unsigned long cpu_set_t;
115# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
116# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
117#endif
118
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119static void set_affinity(void)
120{
121 cpu_set_t mask;
122 int cpu;
6af882ba 123 int ret;
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124
125 if (!use_affinity)
126 return;
127
d8540fc5 128#if HAVE_SCHED_SETAFFINITY
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129 ret = pthread_mutex_lock(&affinity_mutex);
130 if (ret) {
131 perror("Error in pthread mutex lock");
132 exit(-1);
133 }
2a7ac59d 134 cpu = cpu_affinities[next_aff++];
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135 ret = pthread_mutex_unlock(&affinity_mutex);
136 if (ret) {
137 perror("Error in pthread mutex unlock");
138 exit(-1);
139 }
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140 CPU_ZERO(&mask);
141 CPU_SET(cpu, &mask);
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142#if SCHED_SETAFFINITY_ARGS == 2
143 sched_setaffinity(0, &mask);
144#else
2a7ac59d 145 sched_setaffinity(0, sizeof(mask), &mask);
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146#endif
147#endif /* HAVE_SCHED_SETAFFINITY */
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148}
149
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150/*
151 * returns 0 if test should end.
152 */
153static int test_duration_write(void)
154{
78efb485 155 return !test_stop;
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156}
157
158static int test_duration_read(void)
159{
78efb485 160 return !test_stop;
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161}
162
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163static DEFINE_URCU_TLS(unsigned long long, nr_writes);
164static DEFINE_URCU_TLS(unsigned long long, nr_reads);
0ee8bb0a 165
55271c13 166static
06f22bdb 167unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_writes;
55271c13 168static
06f22bdb 169unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE))) *tot_nr_reads;
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170
171static unsigned int nr_readers;
172static unsigned int nr_writers;
173
174pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
175
176void rcu_copy_mutex_lock(void)
177{
178 int ret;
179 ret = pthread_mutex_lock(&rcu_copy_mutex);
180 if (ret) {
181 perror("Error in pthread mutex lock");
182 exit(-1);
183 }
184}
185
186void rcu_copy_mutex_unlock(void)
187{
188 int ret;
189
190 ret = pthread_mutex_unlock(&rcu_copy_mutex);
191 if (ret) {
192 perror("Error in pthread mutex unlock");
193 exit(-1);
194 }
195}
196
197void *thr_reader(void *data)
198{
199 unsigned long tidx = (unsigned long)data;
200
4bad7d45 201 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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202 "reader", pthread_self(), (unsigned long)gettid());
203
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204 set_affinity();
205
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206 while (!test_go)
207 {
208 }
209
210 for (;;) {
211 pthread_mutex_lock(&per_thread_lock[tidx].lock);
212 assert(test_array.a == 8);
a0b7f7ea 213 if (caa_unlikely(rduration))
daddf5b0 214 loop_sleep(rduration);
0ee8bb0a 215 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
bd252a04 216 URCU_TLS(nr_reads)++;
a0b7f7ea 217 if (caa_unlikely(!test_duration_read()))
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218 break;
219 }
220
bd252a04 221 tot_nr_reads[tidx] = URCU_TLS(nr_reads);
cda3c71d 222 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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223 "reader", pthread_self(), (unsigned long)gettid());
224 return ((void*)1);
225
226}
227
228void *thr_writer(void *data)
229{
230 unsigned long wtidx = (unsigned long)data;
231 long tidx;
232
4bad7d45 233 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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234 "writer", pthread_self(), (unsigned long)gettid());
235
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236 set_affinity();
237
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238 while (!test_go)
239 {
240 }
5481ddb3 241 cmm_smp_mb();
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242
243 for (;;) {
244 for (tidx = 0; tidx < nr_readers; tidx++) {
245 pthread_mutex_lock(&per_thread_lock[tidx].lock);
246 }
2b4e4125 247 test_array.a = 0;
0ee8bb0a 248 test_array.a = 8;
a0b7f7ea 249 if (caa_unlikely(wduration))
31b598e0 250 loop_sleep(wduration);
f120cc10 251 for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
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252 pthread_mutex_unlock(&per_thread_lock[tidx].lock);
253 }
bd252a04 254 URCU_TLS(nr_writes)++;
a0b7f7ea 255 if (caa_unlikely(!test_duration_write()))
0ee8bb0a 256 break;
a0b7f7ea 257 if (caa_unlikely(wdelay))
9e31d0f0 258 loop_sleep(wdelay);
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259 }
260
4bad7d45 261 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
0ee8bb0a 262 "writer", pthread_self(), (unsigned long)gettid());
bd252a04 263 tot_nr_writes[wtidx] = URCU_TLS(nr_writes);
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264 return ((void*)2);
265}
266
267void show_usage(int argc, char **argv)
268{
269 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
270#ifdef DEBUG_YIELD
271 printf(" [-r] [-w] (yield reader and/or writer)");
272#endif
273 printf(" [-d delay] (writer period (us))");
daddf5b0 274 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 275 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 276 printf(" [-v] (verbose output)");
9e97e478 277 printf(" [-a cpu#] [-a cpu#]... (affinity)");
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278 printf("\n");
279}
280
281int main(int argc, char **argv)
282{
283 int err;
284 pthread_t *tid_reader, *tid_writer;
285 void *tret;
0ee8bb0a 286 unsigned long long tot_reads = 0, tot_writes = 0;
9e97e478 287 int i, a;
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288
289 if (argc < 4) {
290 show_usage(argc, argv);
291 return -1;
292 }
5481ddb3 293 cmm_smp_mb();
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294
295 err = sscanf(argv[1], "%u", &nr_readers);
296 if (err != 1) {
297 show_usage(argc, argv);
298 return -1;
299 }
300
301 err = sscanf(argv[2], "%u", &nr_writers);
302 if (err != 1) {
303 show_usage(argc, argv);
304 return -1;
305 }
306
307 err = sscanf(argv[3], "%lu", &duration);
308 if (err != 1) {
309 show_usage(argc, argv);
310 return -1;
311 }
312
313 for (i = 4; i < argc; i++) {
314 if (argv[i][0] != '-')
315 continue;
316 switch (argv[i][1]) {
317#ifdef DEBUG_YIELD
318 case 'r':
319 yield_active |= YIELD_READ;
320 break;
321 case 'w':
322 yield_active |= YIELD_WRITE;
323 break;
324#endif
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325 case 'a':
326 if (argc < i + 2) {
327 show_usage(argc, argv);
328 return -1;
329 }
330 a = atoi(argv[++i]);
2a7ac59d 331 cpu_affinities[next_aff++] = a;
9e97e478 332 use_affinity = 1;
4bad7d45 333 printf_verbose("Adding CPU %d affinity\n", a);
9e97e478 334 break;
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335 case 'c':
336 if (argc < i + 2) {
337 show_usage(argc, argv);
338 return -1;
339 }
9e31d0f0 340 rduration = atol(argv[++i]);
8b632bab 341 break;
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342 case 'd':
343 if (argc < i + 2) {
344 show_usage(argc, argv);
345 return -1;
346 }
9e31d0f0 347 wdelay = atol(argv[++i]);
0ee8bb0a 348 break;
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349 case 'e':
350 if (argc < i + 2) {
351 show_usage(argc, argv);
352 return -1;
353 }
354 wduration = atol(argv[++i]);
355 break;
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356 case 'v':
357 verbose_mode = 1;
358 break;
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359 }
360 }
361
4bad7d45 362 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
0ee8bb0a 363 duration, nr_readers, nr_writers);
9e31d0f0 364 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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365 printf_verbose("Reader duration : %lu loops.\n", rduration);
366 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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367 "main", pthread_self(), (unsigned long)gettid());
368
369 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
370 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
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371 tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
372 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
373 per_thread_lock = malloc(sizeof(*per_thread_lock) * nr_readers);
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374 for (i = 0; i < nr_readers; i++) {
375 err = pthread_mutex_init(&per_thread_lock[i].lock, NULL);
376 if (err != 0)
377 exit(1);
378 }
0ee8bb0a 379
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380 next_aff = 0;
381
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382 for (i = 0; i < nr_readers; i++) {
383 err = pthread_create(&tid_reader[i], NULL, thr_reader,
384 (void *)(long)i);
385 if (err != 0)
386 exit(1);
387 }
388 for (i = 0; i < nr_writers; i++) {
389 err = pthread_create(&tid_writer[i], NULL, thr_writer,
390 (void *)(long)i);
391 if (err != 0)
392 exit(1);
393 }
394
5481ddb3 395 cmm_smp_mb();
0ee8bb0a 396
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397 test_go = 1;
398
399 sleep(duration);
400
401 test_stop = 1;
402
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403 for (i = 0; i < nr_readers; i++) {
404 err = pthread_join(tid_reader[i], &tret);
405 if (err != 0)
406 exit(1);
407 tot_reads += tot_nr_reads[i];
408 }
409 for (i = 0; i < nr_writers; i++) {
410 err = pthread_join(tid_writer[i], &tret);
411 if (err != 0)
412 exit(1);
413 tot_writes += tot_nr_writes[i];
414 }
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415
416 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
0ee8bb0a 417 tot_writes);
a50a7b43 418 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 419 "nr_writers %3u "
9e31d0f0 420 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 421 argv[0], duration, nr_readers, rduration, wduration,
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422 nr_writers, wdelay, tot_reads, tot_writes,
423 tot_reads + tot_writes);
424
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425 free(tid_reader);
426 free(tid_writer);
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427 free(tot_nr_reads);
428 free(tot_nr_writes);
429 free(per_thread_lock);
430 return 0;
431}
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