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
47 #define rcu_debug_yield_read()
51 static volatile int test_go
, test_stop
;
53 static unsigned long wdelay
;
55 static int *test_rcu_pointer
;
57 static unsigned long duration
;
59 /* read-side C.S. duration, in loops */
60 static unsigned long rduration
;
62 /* write-side C.S. duration, in loops */
63 static unsigned long wduration
;
65 static inline void loop_sleep(unsigned long loops
)
71 static int verbose_mode
;
73 #define printf_verbose(fmt, args...) \
79 static unsigned int cpu_affinities
[NR_CPUS
];
80 static unsigned int next_aff
= 0;
81 static int use_affinity
= 0;
83 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
85 static void set_affinity(void)
87 #if HAVE_SCHED_SETAFFINITY
90 #endif /* HAVE_SCHED_SETAFFINITY */
95 #if HAVE_SCHED_SETAFFINITY
96 ret
= pthread_mutex_lock(&affinity_mutex
);
98 perror("Error in pthread mutex lock");
101 cpu
= cpu_affinities
[next_aff
++];
102 ret
= pthread_mutex_unlock(&affinity_mutex
);
104 perror("Error in pthread mutex unlock");
110 #if SCHED_SETAFFINITY_ARGS == 2
111 sched_setaffinity(0, &mask
);
113 sched_setaffinity(0, sizeof(mask
), &mask
);
115 #endif /* HAVE_SCHED_SETAFFINITY */
119 * returns 0 if test should end.
121 static int test_duration_write(void)
126 static int test_duration_read(void)
131 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
132 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
134 static unsigned int nr_readers
;
135 static unsigned int nr_writers
;
137 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
139 void rcu_copy_mutex_lock(void)
142 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
144 perror("Error in pthread mutex lock");
149 void rcu_copy_mutex_unlock(void)
153 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
155 perror("Error in pthread mutex unlock");
160 void *thr_reader(void *_count
)
162 unsigned long long *count
= _count
;
165 printf_verbose("thread_begin %s, tid %lu\n",
166 "reader", urcu_get_thread_id());
170 rcu_register_thread();
171 assert(!rcu_read_ongoing());
180 assert(rcu_read_ongoing());
181 local_ptr
= rcu_dereference(test_rcu_pointer
);
182 rcu_debug_yield_read();
184 assert(*local_ptr
== 8);
185 if (caa_unlikely(rduration
))
186 loop_sleep(rduration
);
188 URCU_TLS(nr_reads
)++;
189 if (caa_unlikely(!test_duration_read()))
193 rcu_unregister_thread();
195 /* test extra thread registration */
196 rcu_register_thread();
197 rcu_unregister_thread();
199 *count
= URCU_TLS(nr_reads
);
200 printf_verbose("thread_end %s, tid %lu\n",
201 "reader", urcu_get_thread_id());
206 void *thr_writer(void *_count
)
208 unsigned long long *count
= _count
;
211 printf_verbose("thread_begin %s, tid %lu\n",
212 "writer", urcu_get_thread_id());
222 new = malloc(sizeof(int));
225 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
226 if (caa_unlikely(wduration
))
227 loop_sleep(wduration
);
232 URCU_TLS(nr_writes
)++;
233 if (caa_unlikely(!test_duration_write()))
235 if (caa_unlikely(wdelay
))
239 printf_verbose("thread_end %s, tid %lu\n",
240 "writer", urcu_get_thread_id());
241 *count
= URCU_TLS(nr_writes
);
245 void show_usage(int argc
, char **argv
)
247 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
249 printf("OPTIONS:\n");
251 printf(" [-r] [-w] (yield reader and/or writer)\n");
253 printf(" [-d delay] (writer period (us))\n");
254 printf(" [-c duration] (reader C.S. duration (in loops))\n");
255 printf(" [-e duration] (writer C.S. duration (in loops))\n");
256 printf(" [-v] (verbose output)\n");
257 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
261 int main(int argc
, char **argv
)
264 pthread_t
*tid_reader
, *tid_writer
;
266 unsigned long long *count_reader
, *count_writer
;
267 unsigned long long tot_reads
= 0, tot_writes
= 0;
271 show_usage(argc
, argv
);
275 err
= sscanf(argv
[1], "%u", &nr_readers
);
277 show_usage(argc
, argv
);
281 err
= sscanf(argv
[2], "%u", &nr_writers
);
283 show_usage(argc
, argv
);
287 err
= sscanf(argv
[3], "%lu", &duration
);
289 show_usage(argc
, argv
);
293 for (i
= 4; i
< argc
; i
++) {
294 if (argv
[i
][0] != '-')
296 switch (argv
[i
][1]) {
299 rcu_yield_active
|= RCU_YIELD_READ
;
302 rcu_yield_active
|= RCU_YIELD_WRITE
;
307 show_usage(argc
, argv
);
311 cpu_affinities
[next_aff
++] = a
;
313 printf_verbose("Adding CPU %d affinity\n", a
);
317 show_usage(argc
, argv
);
320 rduration
= atol(argv
[++i
]);
324 show_usage(argc
, argv
);
327 wdelay
= atol(argv
[++i
]);
331 show_usage(argc
, argv
);
334 wduration
= atol(argv
[++i
]);
342 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
343 duration
, nr_readers
, nr_writers
);
344 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
345 printf_verbose("Reader duration : %lu loops.\n", rduration
);
346 printf_verbose("thread %-6s, tid %lu\n",
347 "main", urcu_get_thread_id());
349 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
350 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
351 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
352 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
356 for (i
= 0; i
< nr_readers
; i
++) {
357 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
362 for (i
= 0; i
< nr_writers
; i
++) {
363 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
377 for (i
= 0; i
< nr_readers
; i
++) {
378 err
= pthread_join(tid_reader
[i
], &tret
);
381 tot_reads
+= count_reader
[i
];
383 for (i
= 0; i
< nr_writers
; i
++) {
384 err
= pthread_join(tid_writer
[i
], &tret
);
387 tot_writes
+= count_writer
[i
];
390 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
392 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
394 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
395 argv
[0], duration
, nr_readers
, rduration
, wduration
,
396 nr_writers
, wdelay
, tot_reads
, tot_writes
,
397 tot_reads
+ tot_writes
);
398 free(test_rcu_pointer
);