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.
24 #include "../config.h"
29 #include <sys/types.h>
36 #include <urcu/arch.h>
37 #include <urcu/tls-compat.h>
44 /* hardcoded number of CPUs */
47 #if defined(_syscall0)
48 _syscall0(pid_t
, gettid
)
49 #elif defined(__NR_gettid)
50 static inline pid_t
gettid(void)
52 return syscall(__NR_gettid
);
55 #warning "use pid as tid"
56 static inline pid_t
gettid(void)
62 #ifndef DYNAMIC_LINK_TEST
65 #define debug_yield_read()
73 pthread_rwlock_t lock
= PTHREAD_RWLOCK_INITIALIZER
;
75 static volatile int test_go
, test_stop
;
77 static unsigned long wdelay
;
79 static volatile struct test_array test_array
= { 8 };
81 static unsigned long duration
;
83 /* read-side C.S. duration, in loops */
84 static unsigned long rduration
;
86 /* write-side C.S. duration, in loops */
87 static unsigned long wduration
;
89 static inline void loop_sleep(unsigned long loops
)
95 static int verbose_mode
;
97 #define printf_verbose(fmt, args...) \
103 static unsigned int cpu_affinities
[NR_CPUS
];
104 static unsigned int next_aff
= 0;
105 static int use_affinity
= 0;
107 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
109 static void set_affinity(void)
111 #if HAVE_SCHED_SETAFFINITY
114 #endif /* HAVE_SCHED_SETAFFINITY */
119 #if HAVE_SCHED_SETAFFINITY
120 ret
= pthread_mutex_lock(&affinity_mutex
);
122 perror("Error in pthread mutex lock");
125 cpu
= cpu_affinities
[next_aff
++];
126 ret
= pthread_mutex_unlock(&affinity_mutex
);
128 perror("Error in pthread mutex unlock");
134 #if SCHED_SETAFFINITY_ARGS == 2
135 sched_setaffinity(0, &mask
);
137 sched_setaffinity(0, sizeof(mask
), &mask
);
139 #endif /* HAVE_SCHED_SETAFFINITY */
143 * returns 0 if test should end.
145 static int test_duration_write(void)
150 static int test_duration_read(void)
155 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
156 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
158 static unsigned int nr_readers
;
159 static unsigned int nr_writers
;
161 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
163 void rcu_copy_mutex_lock(void)
166 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
168 perror("Error in pthread mutex lock");
173 void rcu_copy_mutex_unlock(void)
177 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
179 perror("Error in pthread mutex unlock");
184 void *thr_reader(void *_count
)
186 unsigned long long *count
= _count
;
188 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
189 "reader", (unsigned long) pthread_self(),
190 (unsigned long) gettid());
199 pthread_rwlock_rdlock(&lock
);
200 assert(test_array
.a
== 8);
201 if (caa_unlikely(rduration
))
202 loop_sleep(rduration
);
203 pthread_rwlock_unlock(&lock
);
204 URCU_TLS(nr_reads
)++;
205 if (caa_unlikely(!test_duration_read()))
209 *count
= URCU_TLS(nr_reads
);
210 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
211 "reader", (unsigned long) pthread_self(),
212 (unsigned long) gettid());
217 void *thr_writer(void *_count
)
219 unsigned long long *count
= _count
;
221 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
222 "writer", (unsigned long) pthread_self(),
223 (unsigned long) gettid());
233 pthread_rwlock_wrlock(&lock
);
236 if (caa_unlikely(wduration
))
237 loop_sleep(wduration
);
238 pthread_rwlock_unlock(&lock
);
239 URCU_TLS(nr_writes
)++;
240 if (caa_unlikely(!test_duration_write()))
242 if (caa_unlikely(wdelay
))
246 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
247 "writer", (unsigned long) pthread_self(),
248 (unsigned long) gettid());
249 *count
= URCU_TLS(nr_writes
);
253 void show_usage(int argc
, char **argv
)
255 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
257 printf("OPTIONS:\n");
259 printf(" [-r] [-w] (yield reader and/or writer)\n");
261 printf(" [-d delay] (writer period (us))\n");
262 printf(" [-c duration] (reader C.S. duration (in loops))\n");
263 printf(" [-e duration] (writer C.S. duration (in loops))\n");
264 printf(" [-v] (verbose output)\n");
265 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
269 int main(int argc
, char **argv
)
272 pthread_t
*tid_reader
, *tid_writer
;
274 unsigned long long *count_reader
, *count_writer
;
275 unsigned long long tot_reads
= 0, tot_writes
= 0;
279 show_usage(argc
, argv
);
284 err
= sscanf(argv
[1], "%u", &nr_readers
);
286 show_usage(argc
, argv
);
290 err
= sscanf(argv
[2], "%u", &nr_writers
);
292 show_usage(argc
, argv
);
296 err
= sscanf(argv
[3], "%lu", &duration
);
298 show_usage(argc
, argv
);
302 for (i
= 4; i
< argc
; i
++) {
303 if (argv
[i
][0] != '-')
305 switch (argv
[i
][1]) {
308 yield_active
|= YIELD_READ
;
311 yield_active
|= YIELD_WRITE
;
316 show_usage(argc
, argv
);
320 cpu_affinities
[next_aff
++] = a
;
322 printf_verbose("Adding CPU %d affinity\n", a
);
326 show_usage(argc
, argv
);
329 rduration
= atol(argv
[++i
]);
333 show_usage(argc
, argv
);
336 wdelay
= atol(argv
[++i
]);
340 show_usage(argc
, argv
);
343 wduration
= atol(argv
[++i
]);
351 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
352 duration
, nr_readers
, nr_writers
);
353 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
354 printf_verbose("Reader duration : %lu loops.\n", rduration
);
355 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
356 "main", (unsigned long) pthread_self(),
357 (unsigned long) gettid());
359 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
360 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
361 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
362 count_writer
= malloc(sizeof(*count_writer
) * nr_writers
);
366 for (i
= 0; i
< nr_readers
; i
++) {
367 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
372 for (i
= 0; i
< nr_writers
; i
++) {
373 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
387 for (i
= 0; i
< nr_readers
; i
++) {
388 err
= pthread_join(tid_reader
[i
], &tret
);
391 tot_reads
+= count_reader
[i
];
393 for (i
= 0; i
< nr_writers
; i
++) {
394 err
= pthread_join(tid_writer
[i
], &tret
);
397 tot_writes
+= count_writer
[i
];
400 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
402 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
404 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
405 argv
[0], duration
, nr_readers
, rduration
, wduration
,
406 nr_writers
, wdelay
, tot_reads
, tot_writes
,
407 tot_reads
+ tot_writes
);