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.
27 #include <sys/types.h>
33 #include <urcu/arch.h>
34 #include <urcu/assert.h>
35 #include <urcu/tls-compat.h>
36 #include "thread-id.h"
38 /* hardcoded number of CPUs */
41 #ifndef DYNAMIC_LINK_TEST
50 struct per_thread_lock
{
52 } __attribute__((aligned(CAA_CACHE_LINE_SIZE
))); /* cache-line aligned */
54 static struct per_thread_lock
*per_thread_lock
;
56 static volatile int test_go
, test_stop
;
58 static unsigned long wdelay
;
60 static volatile struct test_array test_array
= { 8 };
62 static unsigned long duration
;
64 /* read-side C.S. duration, in loops */
65 static unsigned long rduration
;
67 /* write-side C.S. duration, in loops */
68 static unsigned long wduration
;
70 static inline void loop_sleep(unsigned long loops
)
76 static int verbose_mode
;
78 #define printf_verbose(fmt, args...) \
84 static unsigned int cpu_affinities
[NR_CPUS
];
85 static unsigned int next_aff
= 0;
86 static int use_affinity
= 0;
88 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
90 static void set_affinity(void)
92 #ifdef HAVE_SCHED_SETAFFINITY
95 #endif /* HAVE_SCHED_SETAFFINITY */
100 #ifdef HAVE_SCHED_SETAFFINITY
101 ret
= pthread_mutex_lock(&affinity_mutex
);
104 perror("Error in pthread mutex lock");
107 cpu
= cpu_affinities
[next_aff
++];
108 ret
= pthread_mutex_unlock(&affinity_mutex
);
111 perror("Error in pthread mutex unlock");
116 sched_setaffinity(0, sizeof(mask
), &mask
);
117 #endif /* HAVE_SCHED_SETAFFINITY */
121 * returns 0 if test should end.
123 static int test_duration_write(void)
128 static int test_duration_read(void)
133 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
134 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
137 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
139 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
141 static unsigned int nr_readers
;
142 static unsigned int nr_writers
;
144 static void urcu_mutex_lock(pthread_mutex_t
*lock
)
148 ret
= pthread_mutex_lock(lock
);
151 perror("Error in pthread mutex lock");
156 static void urcu_mutex_unlock(pthread_mutex_t
*lock
)
160 ret
= pthread_mutex_unlock(lock
);
163 perror("Error in pthread mutex unlock");
169 void *thr_reader(void *data
)
171 unsigned long tidx
= (unsigned long)data
;
173 printf_verbose("thread_begin %s, tid %lu\n",
174 "reader", urcu_get_thread_id());
185 urcu_mutex_lock(&per_thread_lock
[tidx
].lock
);
187 urcu_posix_assert(v
== 8);
188 if (caa_unlikely(rduration
))
189 loop_sleep(rduration
);
190 urcu_mutex_unlock(&per_thread_lock
[tidx
].lock
);
191 URCU_TLS(nr_reads
)++;
192 if (caa_unlikely(!test_duration_read()))
196 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
197 printf_verbose("thread_end %s, tid %lu\n",
198 "reader", urcu_get_thread_id());
204 void *thr_writer(void *data
)
206 unsigned long wtidx
= (unsigned long)data
;
209 printf_verbose("thread_begin %s, tid %lu\n",
210 "writer", urcu_get_thread_id());
220 for (tidx
= 0; tidx
< (long)nr_readers
; tidx
++) {
221 urcu_mutex_lock(&per_thread_lock
[tidx
].lock
);
225 if (caa_unlikely(wduration
))
226 loop_sleep(wduration
);
227 for (tidx
= (long)nr_readers
- 1; tidx
>= 0; tidx
--) {
228 urcu_mutex_unlock(&per_thread_lock
[tidx
].lock
);
230 URCU_TLS(nr_writes
)++;
231 if (caa_unlikely(!test_duration_write()))
233 if (caa_unlikely(wdelay
))
237 printf_verbose("thread_end %s, tid %lu\n",
238 "writer", urcu_get_thread_id());
239 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
244 void show_usage(char **argv
)
246 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
248 printf("OPTIONS:\n");
249 printf(" [-d delay] (writer period (us))\n");
250 printf(" [-c duration] (reader C.S. duration (in loops))\n");
251 printf(" [-e duration] (writer C.S. duration (in loops))\n");
252 printf(" [-v] (verbose output)\n");
253 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
257 int main(int argc
, char **argv
)
260 pthread_t
*tid_reader
, *tid_writer
;
262 unsigned long long tot_reads
= 0, tot_writes
= 0;
272 err
= sscanf(argv
[1], "%u", &nr_readers
);
278 err
= sscanf(argv
[2], "%u", &nr_writers
);
284 err
= sscanf(argv
[3], "%lu", &duration
);
290 for (i
= 4; i
< argc
; i
++) {
291 if (argv
[i
][0] != '-')
293 switch (argv
[i
][1]) {
300 cpu_affinities
[next_aff
++] = a
;
302 printf_verbose("Adding CPU %d affinity\n", a
);
309 rduration
= atol(argv
[++i
]);
316 wdelay
= atol(argv
[++i
]);
323 wduration
= atol(argv
[++i
]);
331 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
332 duration
, nr_readers
, nr_writers
);
333 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
334 printf_verbose("Reader duration : %lu loops.\n", rduration
);
335 printf_verbose("thread %-6s, tid %lu\n",
336 "main", urcu_get_thread_id());
338 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
339 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
340 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
341 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
342 per_thread_lock
= calloc(nr_readers
, sizeof(*per_thread_lock
));
343 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
344 pthread_mutex_init(&per_thread_lock
[i_thr
].lock
, NULL
);
349 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
350 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
351 (void *)(long)i_thr
);
355 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
356 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
357 (void *)(long)i_thr
);
370 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
371 err
= pthread_join(tid_reader
[i_thr
], &tret
);
374 tot_reads
+= tot_nr_reads
[i_thr
];
376 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
377 err
= pthread_join(tid_writer
[i_thr
], &tret
);
380 tot_writes
+= tot_nr_writes
[i_thr
];
383 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
385 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
387 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
388 argv
[0], duration
, nr_readers
, rduration
, wduration
,
389 nr_writers
, wdelay
, tot_reads
, tot_writes
,
390 tot_reads
+ tot_writes
);
396 free(per_thread_lock
);