cds_lfht_replace: add checks for old/new node hash/value match
[urcu.git] / tests / test_rwlock.c
1 /*
2 * test_urcu.c
3 *
4 * Userspace RCU library - test program
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
39 #ifdef __linux__
40 #include <syscall.h>
41 #endif
42
43 /* hardcoded number of CPUs */
44 #define NR_CPUS 16384
45
46 #if defined(_syscall0)
47 _syscall0(pid_t, gettid)
48 #elif defined(__NR_gettid)
49 static inline pid_t gettid(void)
50 {
51 return syscall(__NR_gettid);
52 }
53 #else
54 #warning "use pid as tid"
55 static 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
66 #include <urcu.h>
67
68 struct test_array {
69 int a;
70 };
71
72 pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
73
74 static volatile int test_go, test_stop;
75
76 static unsigned long wdelay;
77
78 static volatile struct test_array test_array = { 8 };
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 unsigned long long __thread nr_writes;
160 static unsigned long long __thread nr_reads;
161
162 static unsigned int nr_readers;
163 static unsigned int nr_writers;
164
165 pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
166
167 void rcu_copy_mutex_lock(void)
168 {
169 int ret;
170 ret = pthread_mutex_lock(&rcu_copy_mutex);
171 if (ret) {
172 perror("Error in pthread mutex lock");
173 exit(-1);
174 }
175 }
176
177 void rcu_copy_mutex_unlock(void)
178 {
179 int ret;
180
181 ret = pthread_mutex_unlock(&rcu_copy_mutex);
182 if (ret) {
183 perror("Error in pthread mutex unlock");
184 exit(-1);
185 }
186 }
187
188 void *thr_reader(void *_count)
189 {
190 unsigned long long *count = _count;
191
192 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
193 "reader", pthread_self(), (unsigned long)gettid());
194
195 set_affinity();
196
197 while (!test_go)
198 {
199 }
200
201 for (;;) {
202 pthread_rwlock_rdlock(&lock);
203 assert(test_array.a == 8);
204 if (caa_unlikely(rduration))
205 loop_sleep(rduration);
206 pthread_rwlock_unlock(&lock);
207 nr_reads++;
208 if (caa_unlikely(!test_duration_read()))
209 break;
210 }
211
212 *count = nr_reads;
213 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
214 "reader", pthread_self(), (unsigned long)gettid());
215 return ((void*)1);
216
217 }
218
219 void *thr_writer(void *_count)
220 {
221 unsigned long long *count = _count;
222
223 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
224 "writer", pthread_self(), (unsigned long)gettid());
225
226 set_affinity();
227
228 while (!test_go)
229 {
230 }
231 cmm_smp_mb();
232
233 for (;;) {
234 pthread_rwlock_wrlock(&lock);
235 test_array.a = 0;
236 test_array.a = 8;
237 if (caa_unlikely(wduration))
238 loop_sleep(wduration);
239 pthread_rwlock_unlock(&lock);
240 nr_writes++;
241 if (caa_unlikely(!test_duration_write()))
242 break;
243 if (caa_unlikely(wdelay))
244 loop_sleep(wdelay);
245 }
246
247 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
248 "writer", pthread_self(), (unsigned long)gettid());
249 *count = nr_writes;
250 return ((void*)2);
251 }
252
253 void show_usage(int argc, char **argv)
254 {
255 printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
256 #ifdef DEBUG_YIELD
257 printf(" [-r] [-w] (yield reader and/or writer)");
258 #endif
259 printf(" [-d delay] (writer period (us))");
260 printf(" [-c duration] (reader C.S. duration (in loops))");
261 printf(" [-e duration] (writer C.S. duration (in loops))");
262 printf(" [-v] (verbose output)");
263 printf(" [-a cpu#] [-a cpu#]... (affinity)");
264 printf("\n");
265 }
266
267 int main(int argc, char **argv)
268 {
269 int err;
270 pthread_t *tid_reader, *tid_writer;
271 void *tret;
272 unsigned long long *count_reader, *count_writer;
273 unsigned long long tot_reads = 0, tot_writes = 0;
274 int i, a;
275
276 if (argc < 4) {
277 show_usage(argc, argv);
278 return -1;
279 }
280 cmm_smp_mb();
281
282 err = sscanf(argv[1], "%u", &nr_readers);
283 if (err != 1) {
284 show_usage(argc, argv);
285 return -1;
286 }
287
288 err = sscanf(argv[2], "%u", &nr_writers);
289 if (err != 1) {
290 show_usage(argc, argv);
291 return -1;
292 }
293
294 err = sscanf(argv[3], "%lu", &duration);
295 if (err != 1) {
296 show_usage(argc, argv);
297 return -1;
298 }
299
300 for (i = 4; i < argc; i++) {
301 if (argv[i][0] != '-')
302 continue;
303 switch (argv[i][1]) {
304 #ifdef DEBUG_YIELD
305 case 'r':
306 yield_active |= YIELD_READ;
307 break;
308 case 'w':
309 yield_active |= YIELD_WRITE;
310 break;
311 #endif
312 case 'a':
313 if (argc < i + 2) {
314 show_usage(argc, argv);
315 return -1;
316 }
317 a = atoi(argv[++i]);
318 cpu_affinities[next_aff++] = a;
319 use_affinity = 1;
320 printf_verbose("Adding CPU %d affinity\n", a);
321 break;
322 case 'c':
323 if (argc < i + 2) {
324 show_usage(argc, argv);
325 return -1;
326 }
327 rduration = atol(argv[++i]);
328 break;
329 case 'd':
330 if (argc < i + 2) {
331 show_usage(argc, argv);
332 return -1;
333 }
334 wdelay = atol(argv[++i]);
335 break;
336 case 'e':
337 if (argc < i + 2) {
338 show_usage(argc, argv);
339 return -1;
340 }
341 wduration = atol(argv[++i]);
342 break;
343 case 'v':
344 verbose_mode = 1;
345 break;
346 }
347 }
348
349 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
350 duration, nr_readers, nr_writers);
351 printf_verbose("Writer delay : %lu loops.\n", wdelay);
352 printf_verbose("Reader duration : %lu loops.\n", rduration);
353 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
354 "main", pthread_self(), (unsigned long)gettid());
355
356 tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
357 tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
358 count_reader = malloc(sizeof(*count_reader) * nr_readers);
359 count_writer = malloc(sizeof(*count_writer) * nr_writers);
360
361 next_aff = 0;
362
363 for (i = 0; i < nr_readers; i++) {
364 err = pthread_create(&tid_reader[i], NULL, thr_reader,
365 &count_reader[i]);
366 if (err != 0)
367 exit(1);
368 }
369 for (i = 0; i < nr_writers; i++) {
370 err = pthread_create(&tid_writer[i], NULL, thr_writer,
371 &count_writer[i]);
372 if (err != 0)
373 exit(1);
374 }
375
376 cmm_smp_mb();
377
378 test_go = 1;
379
380 sleep(duration);
381
382 test_stop = 1;
383
384 for (i = 0; i < nr_readers; i++) {
385 err = pthread_join(tid_reader[i], &tret);
386 if (err != 0)
387 exit(1);
388 tot_reads += count_reader[i];
389 }
390 for (i = 0; i < nr_writers; i++) {
391 err = pthread_join(tid_writer[i], &tret);
392 if (err != 0)
393 exit(1);
394 tot_writes += count_writer[i];
395 }
396
397 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
398 tot_writes);
399 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
400 "nr_writers %3u "
401 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
402 argv[0], duration, nr_readers, rduration, wduration,
403 nr_writers, wdelay, tot_reads, tot_writes,
404 tot_reads + tot_writes);
405
406 free(tid_reader);
407 free(tid_writer);
408 free(count_reader);
409 free(count_writer);
410 return 0;
411 }
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