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.
29 #include <sys/types.h>
36 #include <urcu/arch.h>
37 #include <urcu/tls-compat.h>
39 #include "thread-id.h"
40 #include "../common/debug-yield.h"
42 /* hardcoded number of CPUs */
45 #ifndef DYNAMIC_LINK_TEST
49 #include <urcu-defer.h>
55 static volatile int test_go
, test_stop
;
57 static unsigned long wdelay
;
59 static struct test_array
*test_rcu_pointer
;
61 static unsigned long duration
;
63 /* read-side C.S. duration, in loops */
64 static unsigned long rduration
;
66 /* write-side C.S. duration, in loops */
67 static unsigned long wduration
;
69 static inline void loop_sleep(unsigned long loops
)
75 static int verbose_mode
;
77 #define printf_verbose(fmt, args...) \
83 static unsigned int cpu_affinities
[NR_CPUS
];
84 static unsigned int next_aff
= 0;
85 static int use_affinity
= 0;
87 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
89 static void set_affinity(void)
91 #if HAVE_SCHED_SETAFFINITY
94 #endif /* HAVE_SCHED_SETAFFINITY */
99 #if HAVE_SCHED_SETAFFINITY
100 ret
= pthread_mutex_lock(&affinity_mutex
);
102 perror("Error in pthread mutex lock");
105 cpu
= cpu_affinities
[next_aff
++];
106 ret
= pthread_mutex_unlock(&affinity_mutex
);
108 perror("Error in pthread mutex unlock");
114 #if SCHED_SETAFFINITY_ARGS == 2
115 sched_setaffinity(0, &mask
);
117 sched_setaffinity(0, sizeof(mask
), &mask
);
119 #endif /* HAVE_SCHED_SETAFFINITY */
123 * returns 0 if test should end.
125 static int test_duration_write(void)
130 static int test_duration_read(void)
135 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
136 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
139 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
141 static unsigned int nr_readers
;
142 static unsigned int nr_writers
;
144 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
146 void rcu_copy_mutex_lock(void)
149 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
151 perror("Error in pthread mutex lock");
156 void rcu_copy_mutex_unlock(void)
160 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
162 perror("Error in pthread mutex unlock");
167 void *thr_reader(void *_count
)
169 unsigned long long *count
= _count
;
170 struct test_array
*local_ptr
;
172 printf_verbose("thread_begin %s, tid %lu\n",
173 "reader", urcu_get_thread_id());
177 rcu_register_thread();
186 local_ptr
= rcu_dereference(test_rcu_pointer
);
187 rcu_debug_yield_read();
189 assert(local_ptr
->a
== 8);
190 if (caa_unlikely(rduration
))
191 loop_sleep(rduration
);
193 URCU_TLS(nr_reads
)++;
194 if (caa_unlikely(!test_duration_read()))
198 rcu_unregister_thread();
200 *count
= URCU_TLS(nr_reads
);
201 printf_verbose("thread_end %s, tid %lu\n",
202 "reader", urcu_get_thread_id());
207 static void test_cb2(void *data
)
211 static void test_cb1(void *data
)
215 void *thr_writer(void *data
)
217 unsigned long wtidx
= (unsigned long)data
;
218 struct test_array
*new, *old
= NULL
;
221 printf_verbose("thread_begin %s, tid %lu\n",
222 "writer", urcu_get_thread_id());
226 ret
= rcu_defer_register_thread();
228 printf("Error in rcu_defer_register_thread\n");
238 new = malloc(sizeof(*new));
240 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
241 if (caa_unlikely(wduration
))
242 loop_sleep(wduration
);
243 defer_rcu(free
, old
);
244 defer_rcu(test_cb1
, old
);
245 defer_rcu(test_cb1
, (void *)-2L);
246 defer_rcu(test_cb1
, (void *)-2L);
247 defer_rcu(test_cb1
, old
);
248 defer_rcu(test_cb2
, (void *)-2L);
249 defer_rcu(test_cb2
, (void *)-4L);
250 defer_rcu(test_cb2
, (void *)-2L);
251 URCU_TLS(nr_writes
)++;
252 if (caa_unlikely(!test_duration_write()))
254 if (caa_unlikely(wdelay
))
258 rcu_defer_unregister_thread();
260 printf_verbose("thread_end %s, tid %lu\n",
261 "writer", urcu_get_thread_id());
262 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
266 void show_usage(int argc
, char **argv
)
268 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
270 printf("OPTIONS:\n");
271 printf(" [-r] [-w] (yield reader and/or writer)\n");
272 printf(" [-d delay] (writer period (us))\n");
273 printf(" [-c duration] (reader C.S. duration (in loops))\n");
274 printf(" [-e duration] (writer C.S. duration (in loops))\n");
275 printf(" [-v] (verbose output)\n");
276 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
280 int main(int argc
, char **argv
)
283 pthread_t
*tid_reader
, *tid_writer
;
285 unsigned long long *count_reader
;
286 unsigned long long tot_reads
= 0, tot_writes
= 0;
290 show_usage(argc
, argv
);
294 err
= sscanf(argv
[1], "%u", &nr_readers
);
296 show_usage(argc
, argv
);
300 err
= sscanf(argv
[2], "%u", &nr_writers
);
302 show_usage(argc
, argv
);
306 err
= sscanf(argv
[3], "%lu", &duration
);
308 show_usage(argc
, argv
);
312 for (i
= 4; i
< argc
; i
++) {
313 if (argv
[i
][0] != '-')
315 switch (argv
[i
][1]) {
317 rcu_debug_yield_enable(RCU_YIELD_READ
);
320 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
324 show_usage(argc
, argv
);
328 cpu_affinities
[next_aff
++] = a
;
330 printf_verbose("Adding CPU %d affinity\n", a
);
334 show_usage(argc
, argv
);
337 rduration
= atol(argv
[++i
]);
341 show_usage(argc
, argv
);
344 wdelay
= atol(argv
[++i
]);
348 show_usage(argc
, argv
);
351 wduration
= atol(argv
[++i
]);
359 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
360 duration
, nr_readers
, nr_writers
);
361 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
362 printf_verbose("Reader duration : %lu loops.\n", rduration
);
363 printf_verbose("thread %-6s, tid %lu\n",
364 "main", urcu_get_thread_id());
366 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
367 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
368 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
369 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
373 for (i
= 0; i
< nr_readers
; i
++) {
374 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
379 for (i
= 0; i
< nr_writers
; i
++) {
380 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
394 for (i
= 0; i
< nr_readers
; i
++) {
395 err
= pthread_join(tid_reader
[i
], &tret
);
398 tot_reads
+= count_reader
[i
];
400 for (i
= 0; i
< nr_writers
; i
++) {
401 err
= pthread_join(tid_writer
[i
], &tret
);
404 tot_writes
+= tot_nr_writes
[i
];
407 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
409 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
411 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
412 argv
[0], duration
, nr_readers
, rduration
, wduration
,
413 nr_writers
, wdelay
, tot_reads
, tot_writes
,
414 tot_reads
+ tot_writes
);