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>
34 #include <urcu/arch.h>
35 #include <urcu/tls-compat.h>
37 #include "thread-id.h"
39 /* hardcoded number of CPUs */
42 #ifndef DYNAMIC_LINK_TEST
52 * static rwlock initializer is broken on Cygwin. Use runtime
55 pthread_rwlock_t lock
;
57 static volatile int test_go
, test_stop
;
59 static unsigned long wdelay
;
61 static volatile struct test_array test_array
= { 8 };
63 static unsigned long duration
;
65 /* read-side C.S. duration, in loops */
66 static unsigned long rduration
;
68 /* write-side C.S. duration, in loops */
69 static unsigned long wduration
;
71 static inline void loop_sleep(unsigned long loops
)
77 static int verbose_mode
;
79 #define printf_verbose(fmt, args...) \
85 static unsigned int cpu_affinities
[NR_CPUS
];
86 static unsigned int next_aff
= 0;
87 static int use_affinity
= 0;
89 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
91 static void set_affinity(void)
93 #if HAVE_SCHED_SETAFFINITY
96 #endif /* HAVE_SCHED_SETAFFINITY */
101 #if HAVE_SCHED_SETAFFINITY
102 ret
= pthread_mutex_lock(&affinity_mutex
);
104 perror("Error in pthread mutex lock");
107 cpu
= cpu_affinities
[next_aff
++];
108 ret
= pthread_mutex_unlock(&affinity_mutex
);
110 perror("Error in pthread mutex unlock");
116 #if SCHED_SETAFFINITY_ARGS == 2
117 sched_setaffinity(0, &mask
);
119 sched_setaffinity(0, sizeof(mask
), &mask
);
121 #endif /* HAVE_SCHED_SETAFFINITY */
125 * returns 0 if test should end.
127 static int test_duration_write(void)
132 static int test_duration_read(void)
137 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
138 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
140 static unsigned int nr_readers
;
141 static unsigned int nr_writers
;
143 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
146 void *thr_reader(void *_count
)
148 unsigned long long *count
= _count
;
150 printf_verbose("thread_begin %s, tid %lu\n",
151 "reader", urcu_get_thread_id());
162 ret
= pthread_rwlock_rdlock(&lock
);
164 fprintf(stderr
, "reader pthread_rwlock_rdlock: %s\n", strerror(ret
));
170 if (caa_unlikely(rduration
))
171 loop_sleep(rduration
);
173 ret
= pthread_rwlock_unlock(&lock
);
175 fprintf(stderr
, "reader pthread_rwlock_unlock: %s\n", strerror(ret
));
179 URCU_TLS(nr_reads
)++;
180 if (caa_unlikely(!test_duration_read()))
184 *count
= URCU_TLS(nr_reads
);
186 printf_verbose("thread_end %s, tid %lu, count %llu\n",
187 "reader", urcu_get_thread_id(), *count
);
193 void *thr_writer(void *_count
)
195 unsigned long long *count
= _count
;
197 printf_verbose("thread_begin %s, tid %lu\n",
198 "writer", urcu_get_thread_id());
210 ret
= pthread_rwlock_wrlock(&lock
);
212 fprintf(stderr
, "writer pthread_rwlock_wrlock: %s\n", strerror(ret
));
218 if (caa_unlikely(wduration
))
219 loop_sleep(wduration
);
221 ret
= pthread_rwlock_unlock(&lock
);
223 fprintf(stderr
, "writer pthread_rwlock_unlock: %s\n", strerror(ret
));
227 URCU_TLS(nr_writes
)++;
228 if (caa_unlikely(!test_duration_write()))
230 if (caa_unlikely(wdelay
))
233 *count
= URCU_TLS(nr_writes
);
235 printf_verbose("thread_end %s, tid %lu, count %llu\n",
236 "writer", urcu_get_thread_id(), *count
);
241 void show_usage(char **argv
)
243 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
245 printf("OPTIONS:\n");
246 printf(" [-d delay] (writer period (us))\n");
247 printf(" [-c duration] (reader C.S. duration (in loops))\n");
248 printf(" [-e duration] (writer C.S. duration (in loops))\n");
249 printf(" [-v] (verbose output)\n");
250 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
254 int main(int argc
, char **argv
)
257 pthread_t
*tid_reader
, *tid_writer
;
259 unsigned long long *count_reader
, *count_writer
;
260 unsigned long long tot_reads
= 0, tot_writes
= 0;
270 err
= sscanf(argv
[1], "%u", &nr_readers
);
276 err
= sscanf(argv
[2], "%u", &nr_writers
);
282 err
= sscanf(argv
[3], "%lu", &duration
);
288 for (i
= 4; i
< argc
; i
++) {
289 if (argv
[i
][0] != '-')
291 switch (argv
[i
][1]) {
298 cpu_affinities
[next_aff
++] = a
;
300 printf_verbose("Adding CPU %d affinity\n", a
);
307 rduration
= atol(argv
[++i
]);
314 wdelay
= atol(argv
[++i
]);
321 wduration
= atol(argv
[++i
]);
329 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
330 duration
, nr_readers
, nr_writers
);
331 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
332 printf_verbose("Writer duration : %lu loops.\n", wduration
);
333 printf_verbose("Reader duration : %lu loops.\n", rduration
);
334 printf_verbose("thread %-6s, tid %lu\n",
335 "main", urcu_get_thread_id());
337 err
= pthread_rwlock_init(&lock
, NULL
);
339 fprintf(stderr
, "pthread_rwlock_init: (%d) %s\n", err
, strerror(err
));
343 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
344 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
345 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
346 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
350 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
351 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
352 &count_reader
[i_thr
]);
356 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
357 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
358 &count_writer
[i_thr
]);
371 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
372 err
= pthread_join(tid_reader
[i_thr
], &tret
);
375 tot_reads
+= count_reader
[i_thr
];
377 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
378 err
= pthread_join(tid_writer
[i_thr
], &tret
);
381 tot_writes
+= count_writer
[i_thr
];
384 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
386 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
388 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
389 argv
[0], duration
, nr_readers
, rduration
, wduration
,
390 nr_writers
, wdelay
, tot_reads
, tot_writes
,
391 tot_reads
+ tot_writes
);
393 err
= pthread_rwlock_destroy(&lock
);
395 fprintf(stderr
, "pthread_rwlock_destroy: (%d) %s\n", err
, strerror(err
));