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"
37 #include "../common/debug-yield.h"
39 /* hardcoded number of CPUs */
42 #ifndef DYNAMIC_LINK_TEST
47 static volatile int test_go
, test_stop
;
49 static unsigned long wdelay
;
51 static int *test_rcu_pointer
;
53 static unsigned long duration
;
55 /* read-side C.S. duration, in loops */
56 static unsigned long rduration
;
58 /* write-side C.S. duration, in loops */
59 static unsigned long wduration
;
61 static inline void loop_sleep(unsigned long loops
)
67 static int verbose_mode
;
69 #define printf_verbose(fmt, args...) \
75 static unsigned int cpu_affinities
[NR_CPUS
];
76 static unsigned int next_aff
= 0;
77 static int use_affinity
= 0;
79 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
81 static void set_affinity(void)
83 #ifdef HAVE_SCHED_SETAFFINITY
86 #endif /* HAVE_SCHED_SETAFFINITY */
91 #ifdef HAVE_SCHED_SETAFFINITY
92 ret
= pthread_mutex_lock(&affinity_mutex
);
94 perror("Error in pthread mutex lock");
97 cpu
= cpu_affinities
[next_aff
++];
98 ret
= pthread_mutex_unlock(&affinity_mutex
);
100 perror("Error in pthread mutex unlock");
106 sched_setaffinity(0, sizeof(mask
), &mask
);
107 #endif /* HAVE_SCHED_SETAFFINITY */
111 * returns 0 if test should end.
113 static int test_duration_write(void)
118 static int test_duration_read(void)
123 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
124 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
126 static unsigned int nr_readers
;
127 static unsigned int nr_writers
;
129 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
132 void *thr_reader(void *_count
)
134 unsigned long long *count
= _count
;
137 printf_verbose("thread_begin %s, tid %lu\n",
138 "reader", urcu_get_thread_id());
142 rcu_register_thread();
143 urcu_posix_assert(!rcu_read_ongoing());
152 urcu_posix_assert(rcu_read_ongoing());
153 local_ptr
= rcu_dereference(test_rcu_pointer
);
154 rcu_debug_yield_read();
156 urcu_posix_assert(*local_ptr
== 8);
157 if (caa_unlikely(rduration
))
158 loop_sleep(rduration
);
160 URCU_TLS(nr_reads
)++;
161 if (caa_unlikely(!test_duration_read()))
165 rcu_unregister_thread();
167 *count
= URCU_TLS(nr_reads
);
168 printf_verbose("thread_end %s, tid %lu\n",
169 "reader", urcu_get_thread_id());
175 void *thr_writer(void *_count
)
177 unsigned long long *count
= _count
;
180 printf_verbose("thread_begin %s, tid %lu\n",
181 "writer", urcu_get_thread_id());
191 new = malloc(sizeof(int));
193 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
194 if (caa_unlikely(wduration
))
195 loop_sleep(wduration
);
200 URCU_TLS(nr_writes
)++;
201 if (caa_unlikely(!test_duration_write()))
203 if (caa_unlikely(wdelay
))
207 printf_verbose("thread_end %s, tid %lu\n",
208 "writer", urcu_get_thread_id());
209 *count
= URCU_TLS(nr_writes
);
214 void show_usage(char **argv
)
216 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
218 printf("OPTIONS:\n");
219 printf(" [-r] [-w] (yield reader and/or writer)\n");
220 printf(" [-d delay] (writer period (us))\n");
221 printf(" [-c duration] (reader C.S. duration (in loops))\n");
222 printf(" [-e duration] (writer C.S. duration (in loops))\n");
223 printf(" [-v] (verbose output)\n");
224 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
228 int main(int argc
, char **argv
)
231 pthread_t
*tid_reader
, *tid_writer
;
233 unsigned long long *count_reader
, *count_writer
;
234 unsigned long long tot_reads
= 0, tot_writes
= 0;
243 err
= sscanf(argv
[1], "%u", &nr_readers
);
249 err
= sscanf(argv
[2], "%u", &nr_writers
);
255 err
= sscanf(argv
[3], "%lu", &duration
);
261 for (i
= 4; i
< argc
; i
++) {
262 if (argv
[i
][0] != '-')
264 switch (argv
[i
][1]) {
266 rcu_debug_yield_enable(RCU_YIELD_READ
);
269 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
277 cpu_affinities
[next_aff
++] = a
;
279 printf_verbose("Adding CPU %d affinity\n", a
);
286 rduration
= atol(argv
[++i
]);
293 wdelay
= atol(argv
[++i
]);
300 wduration
= atol(argv
[++i
]);
308 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
309 duration
, nr_readers
, nr_writers
);
310 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
311 printf_verbose("Reader duration : %lu loops.\n", rduration
);
312 printf_verbose("thread %-6s, tid %lu\n",
313 "main", urcu_get_thread_id());
315 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
316 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
317 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
318 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
322 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
323 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
324 &count_reader
[i_thr
]);
328 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
329 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
330 &count_writer
[i_thr
]);
343 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
344 err
= pthread_join(tid_reader
[i_thr
], &tret
);
347 tot_reads
+= count_reader
[i_thr
];
349 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
350 err
= pthread_join(tid_writer
[i_thr
], &tret
);
353 tot_writes
+= count_writer
[i_thr
];
356 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
358 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
360 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
361 argv
[0], duration
, nr_readers
, rduration
, wduration
,
362 nr_writers
, wdelay
, tot_reads
, tot_writes
,
363 tot_reads
+ tot_writes
);
365 free(test_rcu_pointer
);