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.
27 #include <sys/types.h>
33 #include <urcu/arch.h>
34 #include <urcu/assert.h>
35 #include <urcu/tls-compat.h>
36 #include "thread-id.h"
38 /* hardcoded number of CPUs */
41 #ifndef DYNAMIC_LINK_TEST
51 * static rwlock initializer is broken on Cygwin. Use runtime
54 pthread_rwlock_t lock
;
56 static volatile int test_go
, test_stop
;
58 static unsigned long wdelay
;
60 static volatile struct test_array test_array
= { 8 };
62 static unsigned long duration
;
64 /* read-side C.S. duration, in loops */
65 static unsigned long rduration
;
67 /* write-side C.S. duration, in loops */
68 static unsigned long wduration
;
70 static inline void loop_sleep(unsigned long loops
)
76 static int verbose_mode
;
78 #define printf_verbose(fmt, args...) \
84 static unsigned int cpu_affinities
[NR_CPUS
];
85 static unsigned int next_aff
= 0;
86 static int use_affinity
= 0;
88 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
90 static void set_affinity(void)
92 #ifdef HAVE_SCHED_SETAFFINITY
95 #endif /* HAVE_SCHED_SETAFFINITY */
100 #ifdef HAVE_SCHED_SETAFFINITY
101 ret
= pthread_mutex_lock(&affinity_mutex
);
103 perror("Error in pthread mutex lock");
106 cpu
= cpu_affinities
[next_aff
++];
107 ret
= pthread_mutex_unlock(&affinity_mutex
);
109 perror("Error in pthread mutex unlock");
115 sched_setaffinity(0, sizeof(mask
), &mask
);
116 #endif /* HAVE_SCHED_SETAFFINITY */
120 * returns 0 if test should end.
122 static int test_duration_write(void)
127 static int test_duration_read(void)
132 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
133 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
135 static unsigned int nr_readers
;
136 static unsigned int nr_writers
;
138 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
141 void *thr_reader(void *_count
)
143 unsigned long long *count
= _count
;
145 printf_verbose("thread_begin %s, tid %lu\n",
146 "reader", urcu_get_thread_id());
157 ret
= pthread_rwlock_rdlock(&lock
);
159 fprintf(stderr
, "reader pthread_rwlock_rdlock: %s\n", strerror(ret
));
164 urcu_posix_assert(a
== 8);
165 if (caa_unlikely(rduration
))
166 loop_sleep(rduration
);
168 ret
= pthread_rwlock_unlock(&lock
);
170 fprintf(stderr
, "reader pthread_rwlock_unlock: %s\n", strerror(ret
));
174 URCU_TLS(nr_reads
)++;
175 if (caa_unlikely(!test_duration_read()))
179 *count
= URCU_TLS(nr_reads
);
181 printf_verbose("thread_end %s, tid %lu, count %llu\n",
182 "reader", urcu_get_thread_id(), *count
);
188 void *thr_writer(void *_count
)
190 unsigned long long *count
= _count
;
192 printf_verbose("thread_begin %s, tid %lu\n",
193 "writer", urcu_get_thread_id());
205 ret
= pthread_rwlock_wrlock(&lock
);
207 fprintf(stderr
, "writer pthread_rwlock_wrlock: %s\n", strerror(ret
));
213 if (caa_unlikely(wduration
))
214 loop_sleep(wduration
);
216 ret
= pthread_rwlock_unlock(&lock
);
218 fprintf(stderr
, "writer pthread_rwlock_unlock: %s\n", strerror(ret
));
222 URCU_TLS(nr_writes
)++;
223 if (caa_unlikely(!test_duration_write()))
225 if (caa_unlikely(wdelay
))
228 *count
= URCU_TLS(nr_writes
);
230 printf_verbose("thread_end %s, tid %lu, count %llu\n",
231 "writer", urcu_get_thread_id(), *count
);
236 void show_usage(char **argv
)
238 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
240 printf("OPTIONS:\n");
241 printf(" [-d delay] (writer period (us))\n");
242 printf(" [-c duration] (reader C.S. duration (in loops))\n");
243 printf(" [-e duration] (writer C.S. duration (in loops))\n");
244 printf(" [-v] (verbose output)\n");
245 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
249 int main(int argc
, char **argv
)
252 pthread_t
*tid_reader
, *tid_writer
;
254 unsigned long long *count_reader
, *count_writer
;
255 unsigned long long tot_reads
= 0, tot_writes
= 0;
265 err
= sscanf(argv
[1], "%u", &nr_readers
);
271 err
= sscanf(argv
[2], "%u", &nr_writers
);
277 err
= sscanf(argv
[3], "%lu", &duration
);
283 for (i
= 4; i
< argc
; i
++) {
284 if (argv
[i
][0] != '-')
286 switch (argv
[i
][1]) {
293 cpu_affinities
[next_aff
++] = a
;
295 printf_verbose("Adding CPU %d affinity\n", a
);
302 rduration
= atol(argv
[++i
]);
309 wdelay
= atol(argv
[++i
]);
316 wduration
= atol(argv
[++i
]);
324 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
325 duration
, nr_readers
, nr_writers
);
326 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
327 printf_verbose("Writer duration : %lu loops.\n", wduration
);
328 printf_verbose("Reader duration : %lu loops.\n", rduration
);
329 printf_verbose("thread %-6s, tid %lu\n",
330 "main", urcu_get_thread_id());
332 err
= pthread_rwlock_init(&lock
, NULL
);
334 fprintf(stderr
, "pthread_rwlock_init: (%d) %s\n", err
, strerror(err
));
338 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
339 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
340 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
341 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
345 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
346 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
347 &count_reader
[i_thr
]);
351 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
352 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
353 &count_writer
[i_thr
]);
366 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
367 err
= pthread_join(tid_reader
[i_thr
], &tret
);
370 tot_reads
+= count_reader
[i_thr
];
372 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
373 err
= pthread_join(tid_writer
[i_thr
], &tret
);
376 tot_writes
+= count_writer
[i_thr
];
379 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
381 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
383 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
384 argv
[0], duration
, nr_readers
, rduration
, wduration
,
385 nr_writers
, wdelay
, tot_reads
, tot_writes
,
386 tot_reads
+ tot_writes
);
388 err
= pthread_rwlock_destroy(&lock
);
390 fprintf(stderr
, "pthread_rwlock_destroy: (%d) %s\n", err
, strerror(err
));