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 struct per_thread_lock
{
55 } __attribute__((aligned(CAA_CACHE_LINE_SIZE
))); /* cache-line aligned */
57 static struct per_thread_lock
*per_thread_lock
;
59 static volatile int test_go
, test_stop
;
61 static unsigned long wdelay
;
63 static volatile struct test_array test_array
= { 8 };
65 static unsigned long duration
;
67 /* read-side C.S. duration, in loops */
68 static unsigned long rduration
;
70 /* write-side C.S. duration, in loops */
71 static unsigned long wduration
;
73 static inline void loop_sleep(unsigned long loops
)
79 static int verbose_mode
;
81 #define printf_verbose(fmt, args...) \
87 static unsigned int cpu_affinities
[NR_CPUS
];
88 static unsigned int next_aff
= 0;
89 static int use_affinity
= 0;
91 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
93 static void set_affinity(void)
95 #if HAVE_SCHED_SETAFFINITY
98 #endif /* HAVE_SCHED_SETAFFINITY */
103 #if HAVE_SCHED_SETAFFINITY
104 ret
= pthread_mutex_lock(&affinity_mutex
);
107 perror("Error in pthread mutex lock");
110 cpu
= cpu_affinities
[next_aff
++];
111 ret
= pthread_mutex_unlock(&affinity_mutex
);
114 perror("Error in pthread mutex unlock");
119 #if SCHED_SETAFFINITY_ARGS == 2
120 sched_setaffinity(0, &mask
);
122 sched_setaffinity(0, sizeof(mask
), &mask
);
124 #endif /* HAVE_SCHED_SETAFFINITY */
128 * returns 0 if test should end.
130 static int test_duration_write(void)
135 static int test_duration_read(void)
140 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
141 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
144 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
146 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
148 static unsigned int nr_readers
;
149 static unsigned int nr_writers
;
151 static void urcu_mutex_lock(pthread_mutex_t
*lock
)
155 ret
= pthread_mutex_lock(lock
);
158 perror("Error in pthread mutex lock");
163 static void urcu_mutex_unlock(pthread_mutex_t
*lock
)
167 ret
= pthread_mutex_unlock(lock
);
170 perror("Error in pthread mutex unlock");
175 void *thr_reader(void *data
)
177 unsigned long tidx
= (unsigned long)data
;
179 printf_verbose("thread_begin %s, tid %lu\n",
180 "reader", urcu_get_thread_id());
191 urcu_mutex_lock(&per_thread_lock
[tidx
].lock
);
194 if (caa_unlikely(rduration
))
195 loop_sleep(rduration
);
196 urcu_mutex_unlock(&per_thread_lock
[tidx
].lock
);
197 URCU_TLS(nr_reads
)++;
198 if (caa_unlikely(!test_duration_read()))
202 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
203 printf_verbose("thread_end %s, tid %lu\n",
204 "reader", urcu_get_thread_id());
209 void *thr_writer(void *data
)
211 unsigned long wtidx
= (unsigned long)data
;
214 printf_verbose("thread_begin %s, tid %lu\n",
215 "writer", urcu_get_thread_id());
225 for (tidx
= 0; tidx
< nr_readers
; tidx
++) {
226 urcu_mutex_lock(&per_thread_lock
[tidx
].lock
);
230 if (caa_unlikely(wduration
))
231 loop_sleep(wduration
);
232 for (tidx
= (long)nr_readers
- 1; tidx
>= 0; tidx
--) {
233 urcu_mutex_unlock(&per_thread_lock
[tidx
].lock
);
235 URCU_TLS(nr_writes
)++;
236 if (caa_unlikely(!test_duration_write()))
238 if (caa_unlikely(wdelay
))
242 printf_verbose("thread_end %s, tid %lu\n",
243 "writer", urcu_get_thread_id());
244 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
248 void show_usage(int argc
, char **argv
)
250 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
252 printf("OPTIONS:\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 tot_reads
= 0, tot_writes
= 0;
270 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 show_usage(argc
, argv
);
303 cpu_affinities
[next_aff
++] = a
;
305 printf_verbose("Adding CPU %d affinity\n", a
);
309 show_usage(argc
, argv
);
312 rduration
= atol(argv
[++i
]);
316 show_usage(argc
, argv
);
319 wdelay
= atol(argv
[++i
]);
323 show_usage(argc
, argv
);
326 wduration
= atol(argv
[++i
]);
334 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
335 duration
, nr_readers
, nr_writers
);
336 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
337 printf_verbose("Reader duration : %lu loops.\n", rduration
);
338 printf_verbose("thread %-6s, tid %lu\n",
339 "main", urcu_get_thread_id());
341 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
342 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
343 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
344 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
345 per_thread_lock
= calloc(nr_readers
, sizeof(*per_thread_lock
));
346 for (i
= 0; i
< nr_readers
; i
++) {
347 pthread_mutex_init(&per_thread_lock
[i
].lock
, NULL
);
352 for (i
= 0; i
< nr_readers
; i
++) {
353 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
358 for (i
= 0; i
< nr_writers
; i
++) {
359 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
373 for (i
= 0; i
< nr_readers
; i
++) {
374 err
= pthread_join(tid_reader
[i
], &tret
);
377 tot_reads
+= tot_nr_reads
[i
];
379 for (i
= 0; i
< nr_writers
; i
++) {
380 err
= pthread_join(tid_writer
[i
], &tret
);
383 tot_writes
+= tot_nr_writes
[i
];
386 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
388 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
390 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
391 argv
[0], duration
, nr_readers
, rduration
, wduration
,
392 nr_writers
, wdelay
, tot_reads
, tot_writes
,
393 tot_reads
+ tot_writes
);
399 free(per_thread_lock
);