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.
27 #include <sys/types.h>
34 #include <urcu/arch.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
46 #include <urcu-defer.h>
52 static volatile int test_go
, test_stop
;
54 static unsigned long wdelay
;
56 static struct test_array
*test_rcu_pointer
;
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");
111 sched_setaffinity(0, sizeof(mask
), &mask
);
112 #endif /* HAVE_SCHED_SETAFFINITY */
116 * returns 0 if test should end.
118 static int test_duration_write(void)
123 static int test_duration_read(void)
128 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
129 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
132 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
134 static unsigned int nr_readers
;
135 static unsigned int nr_writers
;
137 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
139 void rcu_copy_mutex_lock(void)
142 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
144 perror("Error in pthread mutex lock");
149 void rcu_copy_mutex_unlock(void)
153 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
155 perror("Error in pthread mutex unlock");
160 void *thr_reader(void *_count
)
162 unsigned long long *count
= _count
;
163 struct test_array
*local_ptr
;
165 printf_verbose("thread_begin %s, tid %lu\n",
166 "reader", urcu_get_thread_id());
170 rcu_register_thread();
179 local_ptr
= rcu_dereference(test_rcu_pointer
);
180 rcu_debug_yield_read();
182 assert(local_ptr
->a
== 8);
183 if (caa_unlikely(rduration
))
184 loop_sleep(rduration
);
186 URCU_TLS(nr_reads
)++;
187 if (caa_unlikely(!test_duration_read()))
191 rcu_unregister_thread();
193 *count
= URCU_TLS(nr_reads
);
194 printf_verbose("thread_end %s, tid %lu\n",
195 "reader", urcu_get_thread_id());
200 static void test_cb2(void *data
)
204 static void test_cb1(void *data
)
208 void *thr_writer(void *data
)
210 unsigned long wtidx
= (unsigned long)data
;
211 struct test_array
*new, *old
= NULL
;
214 printf_verbose("thread_begin %s, tid %lu\n",
215 "writer", urcu_get_thread_id());
219 ret
= rcu_defer_register_thread();
221 printf("Error in rcu_defer_register_thread\n");
231 new = malloc(sizeof(*new));
233 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
234 if (caa_unlikely(wduration
))
235 loop_sleep(wduration
);
236 defer_rcu(free
, old
);
237 defer_rcu(test_cb1
, old
);
238 defer_rcu(test_cb1
, (void *)-2L);
239 defer_rcu(test_cb1
, (void *)-2L);
240 defer_rcu(test_cb1
, old
);
241 defer_rcu(test_cb2
, (void *)-2L);
242 defer_rcu(test_cb2
, (void *)-4L);
243 defer_rcu(test_cb2
, (void *)-2L);
244 URCU_TLS(nr_writes
)++;
245 if (caa_unlikely(!test_duration_write()))
247 if (caa_unlikely(wdelay
))
251 rcu_defer_unregister_thread();
253 printf_verbose("thread_end %s, tid %lu\n",
254 "writer", urcu_get_thread_id());
255 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
259 void show_usage(int argc
, char **argv
)
261 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
263 printf("OPTIONS:\n");
264 printf(" [-r] [-w] (yield reader and/or writer)\n");
265 printf(" [-d delay] (writer period (us))\n");
266 printf(" [-c duration] (reader C.S. duration (in loops))\n");
267 printf(" [-e duration] (writer C.S. duration (in loops))\n");
268 printf(" [-v] (verbose output)\n");
269 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
273 int main(int argc
, char **argv
)
276 pthread_t
*tid_reader
, *tid_writer
;
278 unsigned long long *count_reader
;
279 unsigned long long tot_reads
= 0, tot_writes
= 0;
284 show_usage(argc
, argv
);
288 err
= sscanf(argv
[1], "%u", &nr_readers
);
290 show_usage(argc
, argv
);
294 err
= sscanf(argv
[2], "%u", &nr_writers
);
296 show_usage(argc
, argv
);
300 err
= sscanf(argv
[3], "%lu", &duration
);
302 show_usage(argc
, argv
);
306 for (i
= 4; i
< argc
; i
++) {
307 if (argv
[i
][0] != '-')
309 switch (argv
[i
][1]) {
311 rcu_debug_yield_enable(RCU_YIELD_READ
);
314 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
318 show_usage(argc
, argv
);
322 cpu_affinities
[next_aff
++] = a
;
324 printf_verbose("Adding CPU %d affinity\n", a
);
328 show_usage(argc
, argv
);
331 rduration
= atol(argv
[++i
]);
335 show_usage(argc
, argv
);
338 wdelay
= atol(argv
[++i
]);
342 show_usage(argc
, argv
);
345 wduration
= atol(argv
[++i
]);
353 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
354 duration
, nr_readers
, nr_writers
);
355 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
356 printf_verbose("Reader duration : %lu loops.\n", rduration
);
357 printf_verbose("thread %-6s, tid %lu\n",
358 "main", urcu_get_thread_id());
360 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
361 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
362 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
363 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
367 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
368 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
369 &count_reader
[i_thr
]);
373 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
374 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
375 (void *)(long)i_thr
);
388 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
389 err
= pthread_join(tid_reader
[i_thr
], &tret
);
392 tot_reads
+= count_reader
[i_thr
];
394 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
395 err
= pthread_join(tid_writer
[i_thr
], &tret
);
398 tot_writes
+= tot_nr_writes
[i_thr
];
401 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
403 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
405 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
406 argv
[0], duration
, nr_readers
, rduration
, wduration
,
407 nr_writers
, wdelay
, tot_reads
, tot_writes
,
408 tot_reads
+ tot_writes
);