4 * Userspace RCU library - test program (with automatic reclamation)
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.
24 #include "../config.h"
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
47 #define rcu_debug_yield_read()
50 #include <urcu-defer.h>
56 static volatile int test_go
, test_stop
;
58 static unsigned long wdelay
;
60 static struct test_array
*test_rcu_pointer
;
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 #if HAVE_SCHED_SETAFFINITY
95 #endif /* HAVE_SCHED_SETAFFINITY */
100 #if HAVE_SCHED_SETAFFINITY
101 ret
= pthread_mutex_lock(&affinity_mutex
);
103 perror("Error in pthread mutex lock");
106 cpu
= cpu_affinities
[next_aff
++];
107 ret
= pthread_mutex_unlock(&affinity_mutex
);
109 perror("Error in pthread mutex unlock");
115 #if SCHED_SETAFFINITY_ARGS == 2
116 sched_setaffinity(0, &mask
);
118 sched_setaffinity(0, sizeof(mask
), &mask
);
120 #endif /* HAVE_SCHED_SETAFFINITY */
124 * returns 0 if test should end.
126 static int test_duration_write(void)
131 static int test_duration_read(void)
136 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
137 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
140 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
142 static unsigned int nr_readers
;
143 static unsigned int nr_writers
;
145 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
147 void rcu_copy_mutex_lock(void)
150 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
152 perror("Error in pthread mutex lock");
157 void rcu_copy_mutex_unlock(void)
161 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
163 perror("Error in pthread mutex unlock");
168 void *thr_reader(void *_count
)
170 unsigned long long *count
= _count
;
171 struct test_array
*local_ptr
;
173 printf_verbose("thread_begin %s, tid %lu\n",
174 "reader", urcu_get_thread_id());
178 rcu_register_thread();
187 local_ptr
= rcu_dereference(test_rcu_pointer
);
188 rcu_debug_yield_read();
190 assert(local_ptr
->a
== 8);
191 if (caa_unlikely(rduration
))
192 loop_sleep(rduration
);
194 URCU_TLS(nr_reads
)++;
195 if (caa_unlikely(!test_duration_read()))
199 rcu_unregister_thread();
201 *count
= URCU_TLS(nr_reads
);
202 printf_verbose("thread_end %s, tid %lu\n",
203 "reader", urcu_get_thread_id());
208 static void test_cb2(void *data
)
212 static void test_cb1(void *data
)
216 void *thr_writer(void *data
)
218 unsigned long wtidx
= (unsigned long)data
;
219 struct test_array
*new, *old
= NULL
;
222 printf_verbose("thread_begin %s, tid %lu\n",
223 "writer", urcu_get_thread_id());
227 ret
= rcu_defer_register_thread();
229 printf("Error in rcu_defer_register_thread\n");
239 new = malloc(sizeof(*new));
241 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
242 if (caa_unlikely(wduration
))
243 loop_sleep(wduration
);
244 defer_rcu(free
, old
);
245 defer_rcu(test_cb1
, old
);
246 defer_rcu(test_cb1
, (void *)-2L);
247 defer_rcu(test_cb1
, (void *)-2L);
248 defer_rcu(test_cb1
, old
);
249 defer_rcu(test_cb2
, (void *)-2L);
250 defer_rcu(test_cb2
, (void *)-4L);
251 defer_rcu(test_cb2
, (void *)-2L);
252 URCU_TLS(nr_writes
)++;
253 if (caa_unlikely(!test_duration_write()))
255 if (caa_unlikely(wdelay
))
259 rcu_defer_unregister_thread();
261 printf_verbose("thread_end %s, tid %lu\n",
262 "writer", urcu_get_thread_id());
263 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
267 void show_usage(int argc
, char **argv
)
269 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
271 printf("OPTIONS:\n");
273 printf(" [-r] [-w] (yield reader and/or writer)\n");
275 printf(" [-d delay] (writer period (us))\n");
276 printf(" [-c duration] (reader C.S. duration (in loops))\n");
277 printf(" [-e duration] (writer C.S. duration (in loops))\n");
278 printf(" [-v] (verbose output)\n");
279 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
283 int main(int argc
, char **argv
)
286 pthread_t
*tid_reader
, *tid_writer
;
288 unsigned long long *count_reader
;
289 unsigned long long tot_reads
= 0, tot_writes
= 0;
293 show_usage(argc
, argv
);
297 err
= sscanf(argv
[1], "%u", &nr_readers
);
299 show_usage(argc
, argv
);
303 err
= sscanf(argv
[2], "%u", &nr_writers
);
305 show_usage(argc
, argv
);
309 err
= sscanf(argv
[3], "%lu", &duration
);
311 show_usage(argc
, argv
);
315 for (i
= 4; i
< argc
; i
++) {
316 if (argv
[i
][0] != '-')
318 switch (argv
[i
][1]) {
321 rcu_yield_active
|= RCU_YIELD_READ
;
324 rcu_yield_active
|= RCU_YIELD_WRITE
;
329 show_usage(argc
, argv
);
333 cpu_affinities
[next_aff
++] = a
;
335 printf_verbose("Adding CPU %d affinity\n", a
);
339 show_usage(argc
, argv
);
342 rduration
= atol(argv
[++i
]);
346 show_usage(argc
, argv
);
349 wdelay
= atol(argv
[++i
]);
353 show_usage(argc
, argv
);
356 wduration
= atol(argv
[++i
]);
364 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
365 duration
, nr_readers
, nr_writers
);
366 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
367 printf_verbose("Reader duration : %lu loops.\n", rduration
);
368 printf_verbose("thread %-6s, tid %lu\n",
369 "main", urcu_get_thread_id());
371 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
372 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
373 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
374 tot_nr_writes
= malloc(sizeof(*tot_nr_writes
) * nr_writers
);
378 for (i
= 0; i
< nr_readers
; i
++) {
379 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
384 for (i
= 0; i
< nr_writers
; i
++) {
385 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
399 for (i
= 0; i
< nr_readers
; i
++) {
400 err
= pthread_join(tid_reader
[i
], &tret
);
403 tot_reads
+= count_reader
[i
];
405 for (i
= 0; i
< nr_writers
; i
++) {
406 err
= pthread_join(tid_writer
[i
], &tret
);
409 tot_writes
+= tot_nr_writes
[i
];
412 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
414 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
416 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
417 argv
[0], duration
, nr_readers
, rduration
, wduration
,
418 nr_writers
, wdelay
, tot_reads
, tot_writes
,
419 tot_reads
+ tot_writes
);