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>
36 #include "thread-id.h"
38 /* hardcoded number of CPUs */
41 #ifndef DYNAMIC_LINK_TEST
50 static pthread_mutex_t lock
= PTHREAD_MUTEX_INITIALIZER
;
52 static volatile int test_go
, test_stop
;
54 static unsigned long wdelay
;
56 static volatile struct test_array test_array
= { 8 };
58 static unsigned long duration
;
60 /* read-side C.S. duration, in loops */
61 static unsigned long rduration
;
63 /* write-side C.S. duration, in loops */
64 static unsigned long wduration
;
66 static inline void loop_sleep(unsigned long loops
)
72 static int verbose_mode
;
74 #define printf_verbose(fmt, args...) \
80 static unsigned int cpu_affinities
[NR_CPUS
];
81 static unsigned int next_aff
= 0;
82 static int use_affinity
= 0;
84 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
86 static void set_affinity(void)
88 #if HAVE_SCHED_SETAFFINITY
91 #endif /* HAVE_SCHED_SETAFFINITY */
96 #if HAVE_SCHED_SETAFFINITY
97 ret
= pthread_mutex_lock(&affinity_mutex
);
99 perror("Error in pthread mutex lock");
102 cpu
= cpu_affinities
[next_aff
++];
103 ret
= pthread_mutex_unlock(&affinity_mutex
);
105 perror("Error in pthread mutex unlock");
110 sched_setaffinity(0, sizeof(mask
), &mask
);
111 #endif /* HAVE_SCHED_SETAFFINITY */
115 * returns 0 if test should end.
117 static int test_duration_write(void)
122 static int test_duration_read(void)
127 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
128 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
131 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
133 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
135 static unsigned int nr_readers
;
136 static unsigned int nr_writers
;
138 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
140 void rcu_copy_mutex_lock(void)
143 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
145 perror("Error in pthread mutex lock");
150 void rcu_copy_mutex_unlock(void)
154 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
156 perror("Error in pthread mutex unlock");
161 void *thr_reader(void *data
)
163 unsigned long tidx
= (unsigned long)data
;
165 printf_verbose("thread_begin %s, tid %lu\n",
166 "reader", urcu_get_thread_id());
177 pthread_mutex_lock(&lock
);
180 if (caa_unlikely(rduration
))
181 loop_sleep(rduration
);
182 pthread_mutex_unlock(&lock
);
183 URCU_TLS(nr_reads
)++;
184 if (caa_unlikely(!test_duration_read()))
188 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
189 printf_verbose("thread_end %s, tid %lu\n",
190 "reader", urcu_get_thread_id());
195 void *thr_writer(void *data
)
197 unsigned long wtidx
= (unsigned long)data
;
199 printf_verbose("thread_begin %s, tid %lu\n",
200 "writer", urcu_get_thread_id());
210 pthread_mutex_lock(&lock
);
213 if (caa_unlikely(wduration
))
214 loop_sleep(wduration
);
215 pthread_mutex_unlock(&lock
);
216 URCU_TLS(nr_writes
)++;
217 if (caa_unlikely(!test_duration_write()))
219 if (caa_unlikely(wdelay
))
223 printf_verbose("thread_end %s, tid %lu\n",
224 "writer", urcu_get_thread_id());
225 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
229 void show_usage(int argc
, char **argv
)
231 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
233 printf("OPTIONS:\n");
234 printf(" [-d delay] (writer period (us))\n");
235 printf(" [-c duration] (reader C.S. duration (in loops))\n");
236 printf(" [-e duration] (writer C.S. duration (in loops))\n");
237 printf(" [-v] (verbose output)\n");
238 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
242 int main(int argc
, char **argv
)
245 pthread_t
*tid_reader
, *tid_writer
;
247 unsigned long long *count_reader
, *count_writer
;
248 unsigned long long tot_reads
= 0, tot_writes
= 0;
253 show_usage(argc
, argv
);
258 err
= sscanf(argv
[1], "%u", &nr_readers
);
260 show_usage(argc
, argv
);
264 err
= sscanf(argv
[2], "%u", &nr_writers
);
266 show_usage(argc
, argv
);
270 err
= sscanf(argv
[3], "%lu", &duration
);
272 show_usage(argc
, argv
);
276 for (i
= 4; i
< argc
; i
++) {
277 if (argv
[i
][0] != '-')
279 switch (argv
[i
][1]) {
282 show_usage(argc
, argv
);
286 cpu_affinities
[next_aff
++] = a
;
288 printf_verbose("Adding CPU %d affinity\n", a
);
292 show_usage(argc
, argv
);
295 rduration
= atol(argv
[++i
]);
299 show_usage(argc
, argv
);
302 wdelay
= atol(argv
[++i
]);
306 show_usage(argc
, argv
);
309 wduration
= atol(argv
[++i
]);
317 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
318 duration
, nr_readers
, nr_writers
);
319 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
320 printf_verbose("Reader duration : %lu loops.\n", rduration
);
321 printf_verbose("thread %-6s, tid %lu\n",
322 "main", urcu_get_thread_id());
324 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
325 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
326 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
327 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
328 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
329 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
333 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
334 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
335 (void *)(long)i_thr
);
339 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
340 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
341 (void *)(long)i_thr
);
354 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
355 err
= pthread_join(tid_reader
[i_thr
], &tret
);
358 tot_reads
+= tot_nr_reads
[i_thr
];
360 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
361 err
= pthread_join(tid_writer
[i_thr
], &tret
);
364 tot_writes
+= tot_nr_writes
[i_thr
];
367 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
369 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
371 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
372 argv
[0], duration
, nr_readers
, rduration
, wduration
,
373 nr_writers
, wdelay
, tot_reads
, tot_writes
,
374 tot_reads
+ tot_writes
);