4 * Userspace RCU library - test program
6 * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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.
29 #include <sys/types.h>
36 #include <urcu/arch.h>
37 #include <urcu/tls-compat.h>
39 #include "thread-id.h"
41 /* hardcoded number of CPUs */
44 #ifndef DYNAMIC_LINK_TEST
54 * static rwlock initializer is broken on Cygwin. Use runtime
57 pthread_rwlock_t lock
;
59 static volatile int test_go
, test_stop
;
61 static unsigned long wdelay
;
63 static volatile struct test_array test_array
= { 8 };
65 static unsigned long duration
;
67 /* read-side C.S. duration, in loops */
68 static unsigned long rduration
;
70 /* write-side C.S. duration, in loops */
71 static unsigned long wduration
;
73 static inline void loop_sleep(unsigned long loops
)
79 static int verbose_mode
;
81 #define printf_verbose(fmt, args...) \
87 static unsigned int cpu_affinities
[NR_CPUS
];
88 static unsigned int next_aff
= 0;
89 static int use_affinity
= 0;
91 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
93 static void set_affinity(void)
95 #if HAVE_SCHED_SETAFFINITY
98 #endif /* HAVE_SCHED_SETAFFINITY */
103 #if HAVE_SCHED_SETAFFINITY
104 ret
= pthread_mutex_lock(&affinity_mutex
);
106 perror("Error in pthread mutex lock");
109 cpu
= cpu_affinities
[next_aff
++];
110 ret
= pthread_mutex_unlock(&affinity_mutex
);
112 perror("Error in pthread mutex unlock");
118 #if SCHED_SETAFFINITY_ARGS == 2
119 sched_setaffinity(0, &mask
);
121 sched_setaffinity(0, sizeof(mask
), &mask
);
123 #endif /* HAVE_SCHED_SETAFFINITY */
127 * returns 0 if test should end.
129 static int test_duration_write(void)
134 static int test_duration_read(void)
139 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
140 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
142 static unsigned int nr_readers
;
143 static unsigned int nr_writers
;
145 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
147 void rcu_copy_mutex_lock(void)
150 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
152 perror("Error in pthread mutex lock");
157 void rcu_copy_mutex_unlock(void)
161 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
163 perror("Error in pthread mutex unlock");
168 void *thr_reader(void *_count
)
170 unsigned long long *count
= _count
;
172 printf_verbose("thread_begin %s, tid %lu\n",
173 "reader", urcu_get_thread_id());
184 ret
= pthread_rwlock_rdlock(&lock
);
186 fprintf(stderr
, "reader pthread_rwlock_rdlock: %s\n", strerror(ret
));
192 if (caa_unlikely(rduration
))
193 loop_sleep(rduration
);
195 ret
= pthread_rwlock_unlock(&lock
);
197 fprintf(stderr
, "reader pthread_rwlock_unlock: %s\n", strerror(ret
));
201 URCU_TLS(nr_reads
)++;
202 if (caa_unlikely(!test_duration_read()))
206 *count
= URCU_TLS(nr_reads
);
207 printf_verbose("thread_end %s, tid %lu\n",
208 "reader", urcu_get_thread_id());
213 void *thr_writer(void *_count
)
215 unsigned long long *count
= _count
;
217 printf_verbose("thread_begin %s, tid %lu\n",
218 "writer", urcu_get_thread_id());
230 ret
= pthread_rwlock_wrlock(&lock
);
232 fprintf(stderr
, "writer pthread_rwlock_wrlock: %s\n", strerror(ret
));
238 if (caa_unlikely(wduration
))
239 loop_sleep(wduration
);
241 ret
= pthread_rwlock_unlock(&lock
);
243 fprintf(stderr
, "writer pthread_rwlock_unlock: %s\n", strerror(ret
));
247 URCU_TLS(nr_writes
)++;
248 if (caa_unlikely(!test_duration_write()))
250 if (caa_unlikely(wdelay
))
254 printf_verbose("thread_end %s, tid %lu\n",
255 "writer", urcu_get_thread_id());
256 *count
= URCU_TLS(nr_writes
);
260 void show_usage(int argc
, char **argv
)
262 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
264 printf("OPTIONS:\n");
265 printf(" [-d delay] (writer period (us))\n");
266 printf(" [-c duration] (reader C.S. duration (in loops))\n");
267 printf(" [-e duration] (writer C.S. duration (in loops))\n");
268 printf(" [-v] (verbose output)\n");
269 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
273 int main(int argc
, char **argv
)
276 pthread_t
*tid_reader
, *tid_writer
;
278 unsigned long long *count_reader
, *count_writer
;
279 unsigned long long tot_reads
= 0, tot_writes
= 0;
283 show_usage(argc
, argv
);
288 err
= sscanf(argv
[1], "%u", &nr_readers
);
290 show_usage(argc
, argv
);
294 err
= sscanf(argv
[2], "%u", &nr_writers
);
296 show_usage(argc
, argv
);
300 err
= sscanf(argv
[3], "%lu", &duration
);
302 show_usage(argc
, argv
);
306 for (i
= 4; i
< argc
; i
++) {
307 if (argv
[i
][0] != '-')
309 switch (argv
[i
][1]) {
312 show_usage(argc
, argv
);
316 cpu_affinities
[next_aff
++] = a
;
318 printf_verbose("Adding CPU %d affinity\n", a
);
322 show_usage(argc
, argv
);
325 rduration
= atol(argv
[++i
]);
329 show_usage(argc
, argv
);
332 wdelay
= atol(argv
[++i
]);
336 show_usage(argc
, argv
);
339 wduration
= atol(argv
[++i
]);
347 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
348 duration
, nr_readers
, nr_writers
);
349 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
350 printf_verbose("Reader duration : %lu loops.\n", rduration
);
351 printf_verbose("thread %-6s, tid %lu\n",
352 "main", urcu_get_thread_id());
354 err
= pthread_rwlock_init(&lock
, NULL
);
356 fprintf(stderr
, "pthread_rwlock_init: (%d) %s\n", err
, strerror(err
));
360 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
361 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
362 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
363 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
367 for (i
= 0; i
< nr_readers
; i
++) {
368 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
373 for (i
= 0; i
< nr_writers
; i
++) {
374 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
388 for (i
= 0; i
< nr_readers
; i
++) {
389 err
= pthread_join(tid_reader
[i
], &tret
);
392 tot_reads
+= count_reader
[i
];
394 for (i
= 0; i
< nr_writers
; i
++) {
395 err
= pthread_join(tid_writer
[i
], &tret
);
398 tot_writes
+= count_writer
[i
];
401 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
403 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
405 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
406 argv
[0], duration
, nr_readers
, rduration
, wduration
,
407 nr_writers
, wdelay
, tot_reads
, tot_writes
,
408 tot_reads
+ tot_writes
);
410 err
= pthread_rwlock_destroy(&lock
);
412 fprintf(stderr
, "pthread_rwlock_destroy: (%d) %s\n", err
, strerror(err
));