cds_lfht_replace: add checks for old/new node hash/value match
[urcu.git] / tests / test_mutex.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
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>
51299083 34#include <sched.h>
94b343fd 35#include <errno.h>
51299083 36
ec4e58a3 37#include <urcu/arch.h>
51299083 38
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39#ifdef __linux__
40#include <syscall.h>
41#endif
42
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43/* hardcoded number of CPUs */
44#define NR_CPUS 16384
45
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46#if defined(_syscall0)
47_syscall0(pid_t, gettid)
48#elif defined(__NR_gettid)
49static inline pid_t gettid(void)
50{
51 return syscall(__NR_gettid);
52}
53#else
54#warning "use pid as tid"
55static inline pid_t gettid(void)
56{
57 return getpid();
58}
59#endif
60
61#ifndef DYNAMIC_LINK_TEST
62#define _LGPL_SOURCE
63#else
64#define debug_yield_read()
65#endif
ec4e58a3 66#include <urcu.h>
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67
68struct test_array {
69 int a;
70};
71
72static pthread_mutex_t lock;
73
74static volatile int test_go, test_stop;
75
9e31d0f0 76static unsigned long wdelay;
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77
78static volatile struct test_array test_array = { 8 };
79
80static unsigned long duration;
81
daddf5b0 82/* read-side C.S. duration, in loops */
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83static unsigned long rduration;
84
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85/* write-side C.S. duration, in loops */
86static unsigned long wduration;
87
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88static inline void loop_sleep(unsigned long l)
89{
90 while(l-- != 0)
06f22bdb 91 caa_cpu_relax();
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92}
93
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94static int verbose_mode;
95
96#define printf_verbose(fmt, args...) \
97 do { \
98 if (verbose_mode) \
99 printf(fmt, args); \
100 } while (0)
101
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102static unsigned int cpu_affinities[NR_CPUS];
103static unsigned int next_aff = 0;
104static int use_affinity = 0;
105
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106pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
107
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108#ifndef HAVE_CPU_SET_T
109typedef 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
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114static void set_affinity(void)
115{
116 cpu_set_t mask;
117 int cpu;
6af882ba 118 int ret;
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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{
150 return !test_stop;
151}
152
153static int test_duration_read(void)
154{
155 return !test_stop;
156}
157
158static unsigned long long __thread nr_writes;
159static unsigned long long __thread nr_reads;
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", pthread_self(), (unsigned long)gettid());
198
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199 set_affinity();
200
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201 while (!test_go)
202 {
203 }
204
205 for (;;) {
206 pthread_mutex_lock(&lock);
207 assert(test_array.a == 8);
a0b7f7ea 208 if (caa_unlikely(rduration))
daddf5b0 209 loop_sleep(rduration);
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210 pthread_mutex_unlock(&lock);
211 nr_reads++;
a0b7f7ea 212 if (caa_unlikely(!test_duration_read()))
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213 break;
214 }
215
216 tot_nr_reads[tidx] = nr_reads;
cda3c71d 217 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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218 "reader", pthread_self(), (unsigned long)gettid());
219 return ((void*)1);
220
221}
222
223void *thr_writer(void *data)
224{
225 unsigned long wtidx = (unsigned long)data;
226
4bad7d45 227 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
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228 "writer", pthread_self(), (unsigned long)gettid());
229
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230 set_affinity();
231
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232 while (!test_go)
233 {
234 }
5481ddb3 235 cmm_smp_mb();
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236
237 for (;;) {
238 pthread_mutex_lock(&lock);
239 test_array.a = 0;
240 test_array.a = 8;
a0b7f7ea 241 if (caa_unlikely(wduration))
31b598e0 242 loop_sleep(wduration);
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243 pthread_mutex_unlock(&lock);
244 nr_writes++;
a0b7f7ea 245 if (caa_unlikely(!test_duration_write()))
51299083 246 break;
a0b7f7ea 247 if (caa_unlikely(wdelay))
9e31d0f0 248 loop_sleep(wdelay);
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249 }
250
4bad7d45 251 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
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252 "writer", pthread_self(), (unsigned long)gettid());
253 tot_nr_writes[wtidx] = nr_writes;
254 return ((void*)2);
255}
256
257void show_usage(int argc, char **argv)
258{
259 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
260#ifdef DEBUG_YIELD
261 printf(" [-r] [-w] (yield reader and/or writer)");
262#endif
263 printf(" [-d delay] (writer period (us))");
daddf5b0 264 printf(" [-c duration] (reader C.S. duration (in loops))");
31b598e0 265 printf(" [-e duration] (writer C.S. duration (in loops))");
4bad7d45 266 printf(" [-v] (verbose output)");
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267 printf(" [-a cpu#] [-a cpu#]... (affinity)");
268 printf("\n");
269}
270
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271int main(int argc, char **argv)
272{
273 int err;
274 pthread_t *tid_reader, *tid_writer;
275 void *tret;
276 unsigned long long *count_reader, *count_writer;
277 unsigned long long tot_reads = 0, tot_writes = 0;
278 int i, a;
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279
280 if (argc < 4) {
281 show_usage(argc, argv);
282 return -1;
283 }
5481ddb3 284 cmm_smp_mb();
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285
286 err = sscanf(argv[1], "%u", &nr_readers);
287 if (err != 1) {
288 show_usage(argc, argv);
289 return -1;
290 }
291
292 err = sscanf(argv[2], "%u", &nr_writers);
293 if (err != 1) {
294 show_usage(argc, argv);
295 return -1;
296 }
297
298 err = sscanf(argv[3], "%lu", &duration);
299 if (err != 1) {
300 show_usage(argc, argv);
301 return -1;
302 }
303
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304 for (i = 4; i < argc; i++) {
305 if (argv[i][0] != '-')
306 continue;
307 switch (argv[i][1]) {
308#ifdef DEBUG_YIELD
309 case 'r':
310 yield_active |= YIELD_READ;
311 break;
312 case 'w':
313 yield_active |= YIELD_WRITE;
314 break;
315#endif
316 case 'a':
317 if (argc < i + 2) {
318 show_usage(argc, argv);
319 return -1;
320 }
321 a = atoi(argv[++i]);
2a7ac59d 322 cpu_affinities[next_aff++] = a;
51299083 323 use_affinity = 1;
4bad7d45 324 printf_verbose("Adding CPU %d affinity\n", a);
51299083 325 break;
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326 case 'c':
327 if (argc < i + 2) {
328 show_usage(argc, argv);
329 return -1;
330 }
9e31d0f0 331 rduration = atol(argv[++i]);
8b632bab 332 break;
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333 case 'd':
334 if (argc < i + 2) {
335 show_usage(argc, argv);
336 return -1;
337 }
9e31d0f0 338 wdelay = atol(argv[++i]);
51299083 339 break;
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340 case 'e':
341 if (argc < i + 2) {
342 show_usage(argc, argv);
343 return -1;
344 }
345 wduration = atol(argv[++i]);
346 break;
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347 case 'v':
348 verbose_mode = 1;
349 break;
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350 }
351 }
352
4bad7d45 353 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
51299083 354 duration, nr_readers, nr_writers);
9e31d0f0 355 printf_verbose("Writer delay : %lu loops.\n", wdelay);
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356 printf_verbose("Reader duration : %lu loops.\n", rduration);
357 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
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358 "main", pthread_self(), (unsigned long)gettid());
359
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360 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
361 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
362 count_reader = malloc(sizeof(*count_reader) * nr_readers);
363 count_writer = malloc(sizeof(*count_writer) * nr_writers);
364 tot_nr_reads = malloc(sizeof(*tot_nr_reads) * nr_readers);
365 tot_nr_writes = malloc(sizeof(*tot_nr_writes) * nr_writers);
366
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367 next_aff = 0;
368
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369 for (i = 0; i < nr_readers; i++) {
370 err = pthread_create(&tid_reader[i], NULL, thr_reader,
371 (void *)(long)i);
372 if (err != 0)
373 exit(1);
374 }
375 for (i = 0; i < nr_writers; i++) {
376 err = pthread_create(&tid_writer[i], NULL, thr_writer,
377 (void *)(long)i);
378 if (err != 0)
379 exit(1);
380 }
381
5481ddb3 382 cmm_smp_mb();
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383
384 test_go = 1;
385
386 sleep(duration);
387
388 test_stop = 1;
389
390 for (i = 0; i < nr_readers; i++) {
391 err = pthread_join(tid_reader[i], &tret);
392 if (err != 0)
393 exit(1);
394 tot_reads += tot_nr_reads[i];
395 }
396 for (i = 0; i < nr_writers; i++) {
397 err = pthread_join(tid_writer[i], &tret);
398 if (err != 0)
399 exit(1);
400 tot_writes += tot_nr_writes[i];
401 }
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402
403 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
51299083 404 tot_writes);
a50a7b43 405 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
cda3c71d 406 "nr_writers %3u "
9e31d0f0 407 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
a50a7b43 408 argv[0], duration, nr_readers, rduration, wduration,
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409 nr_writers, wdelay, tot_reads, tot_writes,
410 tot_reads + tot_writes);
411
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412 free(tid_reader);
413 free(tid_writer);
414 free(count_reader);
415 free(count_writer);
416 free(tot_nr_reads);
417 free(tot_nr_writes);
418 return 0;
419}
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