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 static pthread_mutex_t lock
= PTHREAD_MUTEX_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");
113 #if SCHED_SETAFFINITY_ARGS == 2
114 sched_setaffinity(0, &mask
);
116 sched_setaffinity(0, sizeof(mask
), &mask
);
118 #endif /* HAVE_SCHED_SETAFFINITY */
122 * returns 0 if test should end.
124 static int test_duration_write(void)
129 static int test_duration_read(void)
134 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
135 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
138 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
140 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
142 static unsigned int nr_readers
;
143 static unsigned int nr_writers
;
145 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
147 void rcu_copy_mutex_lock(void)
150 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
152 perror("Error in pthread mutex lock");
157 void rcu_copy_mutex_unlock(void)
161 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
163 perror("Error in pthread mutex unlock");
168 void *thr_reader(void *data
)
170 unsigned long tidx
= (unsigned long)data
;
172 printf_verbose("thread_begin %s, tid %lu\n",
173 "reader", urcu_get_thread_id());
182 pthread_mutex_lock(&lock
);
183 assert(test_array
.a
== 8);
184 if (caa_unlikely(rduration
))
185 loop_sleep(rduration
);
186 pthread_mutex_unlock(&lock
);
187 URCU_TLS(nr_reads
)++;
188 if (caa_unlikely(!test_duration_read()))
192 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
193 printf_verbose("thread_end %s, tid %lu\n",
194 "reader", urcu_get_thread_id());
199 void *thr_writer(void *data
)
201 unsigned long wtidx
= (unsigned long)data
;
203 printf_verbose("thread_begin %s, tid %lu\n",
204 "writer", urcu_get_thread_id());
214 pthread_mutex_lock(&lock
);
217 if (caa_unlikely(wduration
))
218 loop_sleep(wduration
);
219 pthread_mutex_unlock(&lock
);
220 URCU_TLS(nr_writes
)++;
221 if (caa_unlikely(!test_duration_write()))
223 if (caa_unlikely(wdelay
))
227 printf_verbose("thread_end %s, tid %lu\n",
228 "writer", urcu_get_thread_id());
229 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
233 void show_usage(int argc
, char **argv
)
235 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
237 printf("OPTIONS:\n");
238 printf(" [-d delay] (writer period (us))\n");
239 printf(" [-c duration] (reader C.S. duration (in loops))\n");
240 printf(" [-e duration] (writer C.S. duration (in loops))\n");
241 printf(" [-v] (verbose output)\n");
242 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
246 int main(int argc
, char **argv
)
249 pthread_t
*tid_reader
, *tid_writer
;
251 unsigned long long *count_reader
, *count_writer
;
252 unsigned long long tot_reads
= 0, tot_writes
= 0;
256 show_usage(argc
, argv
);
261 err
= sscanf(argv
[1], "%u", &nr_readers
);
263 show_usage(argc
, argv
);
267 err
= sscanf(argv
[2], "%u", &nr_writers
);
269 show_usage(argc
, argv
);
273 err
= sscanf(argv
[3], "%lu", &duration
);
275 show_usage(argc
, argv
);
279 for (i
= 4; i
< argc
; i
++) {
280 if (argv
[i
][0] != '-')
282 switch (argv
[i
][1]) {
285 show_usage(argc
, argv
);
289 cpu_affinities
[next_aff
++] = a
;
291 printf_verbose("Adding CPU %d affinity\n", a
);
295 show_usage(argc
, argv
);
298 rduration
= atol(argv
[++i
]);
302 show_usage(argc
, argv
);
305 wdelay
= atol(argv
[++i
]);
309 show_usage(argc
, argv
);
312 wduration
= atol(argv
[++i
]);
320 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
321 duration
, nr_readers
, nr_writers
);
322 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
323 printf_verbose("Reader duration : %lu loops.\n", rduration
);
324 printf_verbose("thread %-6s, tid %lu\n",
325 "main", urcu_get_thread_id());
327 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
328 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
329 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
330 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
331 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
332 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
336 for (i
= 0; i
< nr_readers
; i
++) {
337 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
342 for (i
= 0; i
< nr_writers
; i
++) {
343 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
357 for (i
= 0; i
< nr_readers
; i
++) {
358 err
= pthread_join(tid_reader
[i
], &tret
);
361 tot_reads
+= tot_nr_reads
[i
];
363 for (i
= 0; i
< nr_writers
; i
++) {
364 err
= pthread_join(tid_writer
[i
], &tret
);
367 tot_writes
+= tot_nr_writes
[i
];
370 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
372 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
374 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
375 argv
[0], duration
, nr_readers
, rduration
, wduration
,
376 nr_writers
, wdelay
, tot_reads
, tot_writes
,
377 tot_reads
+ tot_writes
);