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
53 pthread_rwlock_t lock
= PTHREAD_RWLOCK_INITIALIZER
;
55 static volatile int test_go
, test_stop
;
57 static unsigned long wdelay
;
59 static volatile struct test_array test_array
= { 8 };
61 static unsigned long duration
;
63 /* read-side C.S. duration, in loops */
64 static unsigned long rduration
;
66 /* write-side C.S. duration, in loops */
67 static unsigned long wduration
;
69 static inline void loop_sleep(unsigned long loops
)
75 static int verbose_mode
;
77 #define printf_verbose(fmt, args...) \
83 static unsigned int cpu_affinities
[NR_CPUS
];
84 static unsigned int next_aff
= 0;
85 static int use_affinity
= 0;
87 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
89 static void set_affinity(void)
91 #if HAVE_SCHED_SETAFFINITY
94 #endif /* HAVE_SCHED_SETAFFINITY */
99 #if HAVE_SCHED_SETAFFINITY
100 ret
= pthread_mutex_lock(&affinity_mutex
);
102 perror("Error in pthread mutex lock");
105 cpu
= cpu_affinities
[next_aff
++];
106 ret
= pthread_mutex_unlock(&affinity_mutex
);
108 perror("Error in pthread mutex unlock");
114 #if SCHED_SETAFFINITY_ARGS == 2
115 sched_setaffinity(0, &mask
);
117 sched_setaffinity(0, sizeof(mask
), &mask
);
119 #endif /* HAVE_SCHED_SETAFFINITY */
123 * returns 0 if test should end.
125 static int test_duration_write(void)
130 static int test_duration_read(void)
135 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
136 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
138 static unsigned int nr_readers
;
139 static unsigned int nr_writers
;
141 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
143 void rcu_copy_mutex_lock(void)
146 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
148 perror("Error in pthread mutex lock");
153 void rcu_copy_mutex_unlock(void)
157 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
159 perror("Error in pthread mutex unlock");
164 void *thr_reader(void *_count
)
166 unsigned long long *count
= _count
;
168 printf_verbose("thread_begin %s, tid %lu\n",
169 "reader", urcu_get_thread_id());
180 pthread_rwlock_rdlock(&lock
);
183 if (caa_unlikely(rduration
))
184 loop_sleep(rduration
);
185 pthread_rwlock_unlock(&lock
);
186 URCU_TLS(nr_reads
)++;
187 if (caa_unlikely(!test_duration_read()))
191 *count
= URCU_TLS(nr_reads
);
192 printf_verbose("thread_end %s, tid %lu\n",
193 "reader", urcu_get_thread_id());
198 void *thr_writer(void *_count
)
200 unsigned long long *count
= _count
;
202 printf_verbose("thread_begin %s, tid %lu\n",
203 "writer", urcu_get_thread_id());
213 pthread_rwlock_wrlock(&lock
);
216 if (caa_unlikely(wduration
))
217 loop_sleep(wduration
);
218 pthread_rwlock_unlock(&lock
);
219 URCU_TLS(nr_writes
)++;
220 if (caa_unlikely(!test_duration_write()))
222 if (caa_unlikely(wdelay
))
226 printf_verbose("thread_end %s, tid %lu\n",
227 "writer", urcu_get_thread_id());
228 *count
= URCU_TLS(nr_writes
);
232 void show_usage(int argc
, char **argv
)
234 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
236 printf("OPTIONS:\n");
237 printf(" [-d delay] (writer period (us))\n");
238 printf(" [-c duration] (reader C.S. duration (in loops))\n");
239 printf(" [-e duration] (writer C.S. duration (in loops))\n");
240 printf(" [-v] (verbose output)\n");
241 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
245 int main(int argc
, char **argv
)
248 pthread_t
*tid_reader
, *tid_writer
;
250 unsigned long long *count_reader
, *count_writer
;
251 unsigned long long tot_reads
= 0, tot_writes
= 0;
255 show_usage(argc
, argv
);
260 err
= sscanf(argv
[1], "%u", &nr_readers
);
262 show_usage(argc
, argv
);
266 err
= sscanf(argv
[2], "%u", &nr_writers
);
268 show_usage(argc
, argv
);
272 err
= sscanf(argv
[3], "%lu", &duration
);
274 show_usage(argc
, argv
);
278 for (i
= 4; i
< argc
; i
++) {
279 if (argv
[i
][0] != '-')
281 switch (argv
[i
][1]) {
284 show_usage(argc
, argv
);
288 cpu_affinities
[next_aff
++] = a
;
290 printf_verbose("Adding CPU %d affinity\n", a
);
294 show_usage(argc
, argv
);
297 rduration
= atol(argv
[++i
]);
301 show_usage(argc
, argv
);
304 wdelay
= atol(argv
[++i
]);
308 show_usage(argc
, argv
);
311 wduration
= atol(argv
[++i
]);
319 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
320 duration
, nr_readers
, nr_writers
);
321 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
322 printf_verbose("Reader duration : %lu loops.\n", rduration
);
323 printf_verbose("thread %-6s, tid %lu\n",
324 "main", urcu_get_thread_id());
326 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
327 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
328 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
329 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
333 for (i
= 0; i
< nr_readers
; i
++) {
334 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
339 for (i
= 0; i
< nr_writers
; i
++) {
340 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
354 for (i
= 0; i
< nr_readers
; i
++) {
355 err
= pthread_join(tid_reader
[i
], &tret
);
358 tot_reads
+= count_reader
[i
];
360 for (i
= 0; i
< nr_writers
; i
++) {
361 err
= pthread_join(tid_writer
[i
], &tret
);
364 tot_writes
+= count_writer
[i
];
367 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
369 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
371 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
372 argv
[0], duration
, nr_readers
, rduration
, wduration
,
373 nr_writers
, wdelay
, tot_reads
, tot_writes
,
374 tot_reads
+ tot_writes
);