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>
34 #include <urcu/arch.h>
35 #include <urcu/tls-compat.h>
37 #include "thread-id.h"
39 /* hardcoded number of CPUs */
42 #ifndef DYNAMIC_LINK_TEST
51 static pthread_mutex_t lock
= PTHREAD_MUTEX_INITIALIZER
;
53 static volatile int test_go
, test_stop
;
55 static unsigned long wdelay
;
57 static volatile struct test_array test_array
= { 8 };
59 static unsigned long duration
;
61 /* read-side C.S. duration, in loops */
62 static unsigned long rduration
;
64 /* write-side C.S. duration, in loops */
65 static unsigned long wduration
;
67 static inline void loop_sleep(unsigned long loops
)
73 static int verbose_mode
;
75 #define printf_verbose(fmt, args...) \
81 static unsigned int cpu_affinities
[NR_CPUS
];
82 static unsigned int next_aff
= 0;
83 static int use_affinity
= 0;
85 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
87 static void set_affinity(void)
89 #if HAVE_SCHED_SETAFFINITY
92 #endif /* HAVE_SCHED_SETAFFINITY */
97 #if HAVE_SCHED_SETAFFINITY
98 ret
= pthread_mutex_lock(&affinity_mutex
);
100 perror("Error in pthread mutex lock");
103 cpu
= cpu_affinities
[next_aff
++];
104 ret
= pthread_mutex_unlock(&affinity_mutex
);
106 perror("Error in pthread mutex unlock");
111 #if SCHED_SETAFFINITY_ARGS == 2
112 sched_setaffinity(0, &mask
);
114 sched_setaffinity(0, sizeof(mask
), &mask
);
116 #endif /* HAVE_SCHED_SETAFFINITY */
120 * returns 0 if test should end.
122 static int test_duration_write(void)
127 static int test_duration_read(void)
132 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
133 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
136 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
138 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
140 static unsigned int nr_readers
;
141 static unsigned int nr_writers
;
143 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
146 void *thr_reader(void *data
)
148 unsigned long tidx
= (unsigned long)data
;
150 printf_verbose("thread_begin %s, tid %lu\n",
151 "reader", urcu_get_thread_id());
162 pthread_mutex_lock(&lock
);
165 if (caa_unlikely(rduration
))
166 loop_sleep(rduration
);
167 pthread_mutex_unlock(&lock
);
168 URCU_TLS(nr_reads
)++;
169 if (caa_unlikely(!test_duration_read()))
173 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
174 printf_verbose("thread_end %s, tid %lu\n",
175 "reader", urcu_get_thread_id());
181 void *thr_writer(void *data
)
183 unsigned long wtidx
= (unsigned long)data
;
185 printf_verbose("thread_begin %s, tid %lu\n",
186 "writer", urcu_get_thread_id());
196 pthread_mutex_lock(&lock
);
199 if (caa_unlikely(wduration
))
200 loop_sleep(wduration
);
201 pthread_mutex_unlock(&lock
);
202 URCU_TLS(nr_writes
)++;
203 if (caa_unlikely(!test_duration_write()))
205 if (caa_unlikely(wdelay
))
209 printf_verbose("thread_end %s, tid %lu\n",
210 "writer", urcu_get_thread_id());
211 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
216 void show_usage(int argc
, char **argv
)
218 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
220 printf("OPTIONS:\n");
221 printf(" [-d delay] (writer period (us))\n");
222 printf(" [-c duration] (reader C.S. duration (in loops))\n");
223 printf(" [-e duration] (writer C.S. duration (in loops))\n");
224 printf(" [-v] (verbose output)\n");
225 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
229 int main(int argc
, char **argv
)
232 pthread_t
*tid_reader
, *tid_writer
;
234 unsigned long long *count_reader
, *count_writer
;
235 unsigned long long tot_reads
= 0, tot_writes
= 0;
240 show_usage(argc
, argv
);
245 err
= sscanf(argv
[1], "%u", &nr_readers
);
247 show_usage(argc
, argv
);
251 err
= sscanf(argv
[2], "%u", &nr_writers
);
253 show_usage(argc
, argv
);
257 err
= sscanf(argv
[3], "%lu", &duration
);
259 show_usage(argc
, argv
);
263 for (i
= 4; i
< argc
; i
++) {
264 if (argv
[i
][0] != '-')
266 switch (argv
[i
][1]) {
269 show_usage(argc
, argv
);
273 cpu_affinities
[next_aff
++] = a
;
275 printf_verbose("Adding CPU %d affinity\n", a
);
279 show_usage(argc
, argv
);
282 rduration
= atol(argv
[++i
]);
286 show_usage(argc
, argv
);
289 wdelay
= atol(argv
[++i
]);
293 show_usage(argc
, argv
);
296 wduration
= atol(argv
[++i
]);
304 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
305 duration
, nr_readers
, nr_writers
);
306 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
307 printf_verbose("Reader duration : %lu loops.\n", rduration
);
308 printf_verbose("thread %-6s, tid %lu\n",
309 "main", urcu_get_thread_id());
311 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
312 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
313 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
314 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
315 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
316 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
320 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
321 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
322 (void *)(long)i_thr
);
326 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
327 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
328 (void *)(long)i_thr
);
341 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
342 err
= pthread_join(tid_reader
[i_thr
], &tret
);
345 tot_reads
+= tot_nr_reads
[i_thr
];
347 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
348 err
= pthread_join(tid_writer
[i_thr
], &tret
);
351 tot_writes
+= tot_nr_writes
[i_thr
];
354 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
356 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
358 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
359 argv
[0], duration
, nr_readers
, rduration
, wduration
,
360 nr_writers
, wdelay
, tot_reads
, tot_writes
,
361 tot_reads
+ tot_writes
);