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>
44 /* hardcoded number of CPUs */
47 #if defined(_syscall0)
48 _syscall0(pid_t
, gettid
)
49 #elif defined(__NR_gettid)
50 static inline pid_t
gettid(void)
52 return syscall(__NR_gettid
);
55 #warning "use pid as tid"
56 static inline pid_t
gettid(void)
62 #ifndef DYNAMIC_LINK_TEST
65 #define debug_yield_read()
68 #include <urcu-defer.h>
74 static volatile int test_go
, test_stop
;
76 static unsigned long wdelay
;
78 static struct test_array
*test_rcu_pointer
;
80 static unsigned long duration
;
82 /* read-side C.S. duration, in loops */
83 static unsigned long rduration
;
85 /* write-side C.S. duration, in loops */
86 static unsigned long wduration
;
88 static inline void loop_sleep(unsigned long l
)
94 static int verbose_mode
;
96 #define printf_verbose(fmt, args...) \
102 static unsigned int cpu_affinities
[NR_CPUS
];
103 static unsigned int next_aff
= 0;
104 static int use_affinity
= 0;
106 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
108 static void set_affinity(void)
117 #if HAVE_SCHED_SETAFFINITY
118 ret
= pthread_mutex_lock(&affinity_mutex
);
120 perror("Error in pthread mutex lock");
123 cpu
= cpu_affinities
[next_aff
++];
124 ret
= pthread_mutex_unlock(&affinity_mutex
);
126 perror("Error in pthread mutex unlock");
132 #if SCHED_SETAFFINITY_ARGS == 2
133 sched_setaffinity(0, &mask
);
135 sched_setaffinity(0, sizeof(mask
), &mask
);
137 #endif /* HAVE_SCHED_SETAFFINITY */
141 * returns 0 if test should end.
143 static int test_duration_write(void)
148 static int test_duration_read(void)
153 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
154 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
157 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
159 static unsigned int nr_readers
;
160 static unsigned int nr_writers
;
162 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
164 void rcu_copy_mutex_lock(void)
167 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
169 perror("Error in pthread mutex lock");
174 void rcu_copy_mutex_unlock(void)
178 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
180 perror("Error in pthread mutex unlock");
185 void *thr_reader(void *_count
)
187 unsigned long long *count
= _count
;
188 struct test_array
*local_ptr
;
190 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
191 "reader", (unsigned long) pthread_self(),
192 (unsigned long) gettid());
196 rcu_register_thread();
205 local_ptr
= rcu_dereference(test_rcu_pointer
);
208 assert(local_ptr
->a
== 8);
209 if (caa_unlikely(rduration
))
210 loop_sleep(rduration
);
212 URCU_TLS(nr_reads
)++;
213 if (caa_unlikely(!test_duration_read()))
217 rcu_unregister_thread();
219 *count
= URCU_TLS(nr_reads
);
220 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
221 "reader", (unsigned long) pthread_self(),
222 (unsigned long) gettid());
227 static void test_cb2(void *data
)
231 static void test_cb1(void *data
)
235 void *thr_writer(void *data
)
237 unsigned long wtidx
= (unsigned long)data
;
238 struct test_array
*new, *old
= NULL
;
241 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
242 "writer", (unsigned long) pthread_self(),
243 (unsigned long) gettid());
247 ret
= rcu_defer_register_thread();
249 printf("Error in rcu_defer_register_thread\n");
259 new = malloc(sizeof(*new));
261 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
262 if (caa_unlikely(wduration
))
263 loop_sleep(wduration
);
264 defer_rcu(free
, old
);
265 defer_rcu(test_cb1
, old
);
266 defer_rcu(test_cb1
, (void *)-2L);
267 defer_rcu(test_cb1
, (void *)-2L);
268 defer_rcu(test_cb1
, old
);
269 defer_rcu(test_cb2
, (void *)-2L);
270 defer_rcu(test_cb2
, (void *)-4L);
271 defer_rcu(test_cb2
, (void *)-2L);
272 URCU_TLS(nr_writes
)++;
273 if (caa_unlikely(!test_duration_write()))
275 if (caa_unlikely(wdelay
))
279 rcu_defer_unregister_thread();
281 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
282 "writer", (unsigned long) pthread_self(),
283 (unsigned long) gettid());
284 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
288 void show_usage(int argc
, char **argv
)
290 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
292 printf(" [-r] [-w] (yield reader and/or writer)");
294 printf(" [-d delay] (writer period (us))");
295 printf(" [-c duration] (reader C.S. duration (in loops))");
296 printf(" [-e duration] (writer C.S. duration (in loops))");
297 printf(" [-v] (verbose output)");
298 printf(" [-a cpu#] [-a cpu#]... (affinity)");
302 int main(int argc
, char **argv
)
305 pthread_t
*tid_reader
, *tid_writer
;
307 unsigned long long *count_reader
;
308 unsigned long long tot_reads
= 0, tot_writes
= 0;
312 show_usage(argc
, argv
);
316 err
= sscanf(argv
[1], "%u", &nr_readers
);
318 show_usage(argc
, argv
);
322 err
= sscanf(argv
[2], "%u", &nr_writers
);
324 show_usage(argc
, argv
);
328 err
= sscanf(argv
[3], "%lu", &duration
);
330 show_usage(argc
, argv
);
334 for (i
= 4; i
< argc
; i
++) {
335 if (argv
[i
][0] != '-')
337 switch (argv
[i
][1]) {
340 yield_active
|= YIELD_READ
;
343 yield_active
|= YIELD_WRITE
;
348 show_usage(argc
, argv
);
352 cpu_affinities
[next_aff
++] = a
;
354 printf_verbose("Adding CPU %d affinity\n", a
);
358 show_usage(argc
, argv
);
361 rduration
= atol(argv
[++i
]);
365 show_usage(argc
, argv
);
368 wdelay
= atol(argv
[++i
]);
372 show_usage(argc
, argv
);
375 wduration
= atol(argv
[++i
]);
383 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
384 duration
, nr_readers
, nr_writers
);
385 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
386 printf_verbose("Reader duration : %lu loops.\n", rduration
);
387 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
388 "main", (unsigned long) pthread_self(),
389 (unsigned long) gettid());
391 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
392 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
393 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
394 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
398 for (i
= 0; i
< nr_readers
; i
++) {
399 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
404 for (i
= 0; i
< nr_writers
; i
++) {
405 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
419 for (i
= 0; i
< nr_readers
; i
++) {
420 err
= pthread_join(tid_reader
[i
], &tret
);
423 tot_reads
+= count_reader
[i
];
425 for (i
= 0; i
< nr_writers
; i
++) {
426 err
= pthread_join(tid_writer
[i
], &tret
);
429 tot_writes
+= tot_nr_writes
[i
];
432 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
434 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
436 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
437 argv
[0], duration
, nr_readers
, rduration
, wduration
,
438 nr_writers
, wdelay
, tot_reads
, tot_writes
,
439 tot_reads
+ tot_writes
);