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"
40 #include "../common/debug-yield.h"
42 /* hardcoded number of CPUs */
45 #ifndef DYNAMIC_LINK_TEST
50 static volatile int test_go
, test_stop
;
52 static unsigned long wdelay
;
54 static int *test_rcu_pointer
;
56 static unsigned long duration
;
58 /* read-side C.S. duration, in loops */
59 static unsigned long rduration
;
61 /* write-side C.S. duration, in loops */
62 static unsigned long wduration
;
64 static inline void loop_sleep(unsigned long loops
)
70 static int verbose_mode
;
72 #define printf_verbose(fmt, args...) \
78 static unsigned int cpu_affinities
[NR_CPUS
];
79 static unsigned int next_aff
= 0;
80 static int use_affinity
= 0;
82 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
84 static void set_affinity(void)
86 #if HAVE_SCHED_SETAFFINITY
89 #endif /* HAVE_SCHED_SETAFFINITY */
94 #if HAVE_SCHED_SETAFFINITY
95 ret
= pthread_mutex_lock(&affinity_mutex
);
97 perror("Error in pthread mutex lock");
100 cpu
= cpu_affinities
[next_aff
++];
101 ret
= pthread_mutex_unlock(&affinity_mutex
);
103 perror("Error in pthread mutex unlock");
109 #if SCHED_SETAFFINITY_ARGS == 2
110 sched_setaffinity(0, &mask
);
112 sched_setaffinity(0, sizeof(mask
), &mask
);
114 #endif /* HAVE_SCHED_SETAFFINITY */
118 * returns 0 if test should end.
120 static int test_duration_write(void)
125 static int test_duration_read(void)
130 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
131 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
133 static unsigned int nr_readers
;
134 static unsigned int nr_writers
;
136 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
138 void rcu_copy_mutex_lock(void)
141 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
143 perror("Error in pthread mutex lock");
148 void rcu_copy_mutex_unlock(void)
152 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
154 perror("Error in pthread mutex unlock");
159 void *thr_reader(void *_count
)
161 unsigned long long *count
= _count
;
164 printf_verbose("thread_begin %s, tid %lu\n",
165 "reader", urcu_get_thread_id());
169 rcu_register_thread();
170 assert(!rcu_read_ongoing());
179 assert(rcu_read_ongoing());
180 local_ptr
= rcu_dereference(test_rcu_pointer
);
181 rcu_debug_yield_read();
183 assert(*local_ptr
== 8);
184 if (caa_unlikely(rduration
))
185 loop_sleep(rduration
);
187 URCU_TLS(nr_reads
)++;
188 if (caa_unlikely(!test_duration_read()))
192 rcu_unregister_thread();
194 *count
= URCU_TLS(nr_reads
);
195 printf_verbose("thread_end %s, tid %lu\n",
196 "reader", urcu_get_thread_id());
201 void *thr_writer(void *_count
)
203 unsigned long long *count
= _count
;
206 printf_verbose("thread_begin %s, tid %lu\n",
207 "writer", urcu_get_thread_id());
217 new = malloc(sizeof(int));
219 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
220 if (caa_unlikely(wduration
))
221 loop_sleep(wduration
);
226 URCU_TLS(nr_writes
)++;
227 if (caa_unlikely(!test_duration_write()))
229 if (caa_unlikely(wdelay
))
233 printf_verbose("thread_end %s, tid %lu\n",
234 "writer", urcu_get_thread_id());
235 *count
= URCU_TLS(nr_writes
);
239 void show_usage(int argc
, char **argv
)
241 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
243 printf("OPTIONS:\n");
244 printf(" [-r] [-w] (yield reader and/or writer)\n");
245 printf(" [-d delay] (writer period (us))\n");
246 printf(" [-c duration] (reader C.S. duration (in loops))\n");
247 printf(" [-e duration] (writer C.S. duration (in loops))\n");
248 printf(" [-v] (verbose output)\n");
249 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
253 int main(int argc
, char **argv
)
256 pthread_t
*tid_reader
, *tid_writer
;
258 unsigned long long *count_reader
, *count_writer
;
259 unsigned long long tot_reads
= 0, tot_writes
= 0;
263 show_usage(argc
, argv
);
267 err
= sscanf(argv
[1], "%u", &nr_readers
);
269 show_usage(argc
, argv
);
273 err
= sscanf(argv
[2], "%u", &nr_writers
);
275 show_usage(argc
, argv
);
279 err
= sscanf(argv
[3], "%lu", &duration
);
281 show_usage(argc
, argv
);
285 for (i
= 4; i
< argc
; i
++) {
286 if (argv
[i
][0] != '-')
288 switch (argv
[i
][1]) {
290 rcu_debug_yield_enable(RCU_YIELD_READ
);
293 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
297 show_usage(argc
, argv
);
301 cpu_affinities
[next_aff
++] = a
;
303 printf_verbose("Adding CPU %d affinity\n", a
);
307 show_usage(argc
, argv
);
310 rduration
= atol(argv
[++i
]);
314 show_usage(argc
, argv
);
317 wdelay
= atol(argv
[++i
]);
321 show_usage(argc
, argv
);
324 wduration
= atol(argv
[++i
]);
332 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
333 duration
, nr_readers
, nr_writers
);
334 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
335 printf_verbose("Reader duration : %lu loops.\n", rduration
);
336 printf_verbose("thread %-6s, tid %lu\n",
337 "main", urcu_get_thread_id());
339 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
340 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
341 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
342 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
346 for (i
= 0; i
< nr_readers
; i
++) {
347 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
352 for (i
= 0; i
< nr_writers
; i
++) {
353 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
367 for (i
= 0; i
< nr_readers
; i
++) {
368 err
= pthread_join(tid_reader
[i
], &tret
);
371 tot_reads
+= count_reader
[i
];
373 for (i
= 0; i
< nr_writers
; i
++) {
374 err
= pthread_join(tid_writer
[i
], &tret
);
377 tot_writes
+= count_writer
[i
];
380 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
382 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
384 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
385 argv
[0], duration
, nr_readers
, rduration
, wduration
,
386 nr_writers
, wdelay
, tot_reads
, tot_writes
,
387 tot_reads
+ tot_writes
);
388 free(test_rcu_pointer
);