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
;
140 void *thr_reader(void *_count
)
142 unsigned long long *count
= _count
;
143 struct test_array
*local_ptr
;
145 printf_verbose("thread_begin %s, tid %lu\n",
146 "reader", urcu_get_thread_id());
150 rcu_register_thread();
159 local_ptr
= rcu_dereference(test_rcu_pointer
);
160 rcu_debug_yield_read();
162 assert(local_ptr
->a
== 8);
163 if (caa_unlikely(rduration
))
164 loop_sleep(rduration
);
166 URCU_TLS(nr_reads
)++;
167 if (caa_unlikely(!test_duration_read()))
171 rcu_unregister_thread();
173 *count
= URCU_TLS(nr_reads
);
174 printf_verbose("thread_end %s, tid %lu\n",
175 "reader", urcu_get_thread_id());
180 static void test_cb2(void *data
)
184 static void test_cb1(void *data
)
189 void *thr_writer(void *data
)
191 unsigned long wtidx
= (unsigned long)data
;
192 struct test_array
*new, *old
= NULL
;
195 printf_verbose("thread_begin %s, tid %lu\n",
196 "writer", urcu_get_thread_id());
200 ret
= rcu_defer_register_thread();
202 printf("Error in rcu_defer_register_thread\n");
212 new = malloc(sizeof(*new));
214 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
215 if (caa_unlikely(wduration
))
216 loop_sleep(wduration
);
217 defer_rcu(free
, old
);
218 defer_rcu(test_cb1
, old
);
219 defer_rcu(test_cb1
, (void *)-2L);
220 defer_rcu(test_cb1
, (void *)-2L);
221 defer_rcu(test_cb1
, old
);
222 defer_rcu(test_cb2
, (void *)-2L);
223 defer_rcu(test_cb2
, (void *)-4L);
224 defer_rcu(test_cb2
, (void *)-2L);
225 URCU_TLS(nr_writes
)++;
226 if (caa_unlikely(!test_duration_write()))
228 if (caa_unlikely(wdelay
))
232 rcu_defer_unregister_thread();
234 printf_verbose("thread_end %s, tid %lu\n",
235 "writer", urcu_get_thread_id());
236 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
241 void show_usage(int argc
, char **argv
)
243 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
245 printf("OPTIONS:\n");
246 printf(" [-r] [-w] (yield reader and/or writer)\n");
247 printf(" [-d delay] (writer period (us))\n");
248 printf(" [-c duration] (reader C.S. duration (in loops))\n");
249 printf(" [-e duration] (writer C.S. duration (in loops))\n");
250 printf(" [-v] (verbose output)\n");
251 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
255 int main(int argc
, char **argv
)
258 pthread_t
*tid_reader
, *tid_writer
;
260 unsigned long long *count_reader
;
261 unsigned long long tot_reads
= 0, tot_writes
= 0;
266 show_usage(argc
, argv
);
270 err
= sscanf(argv
[1], "%u", &nr_readers
);
272 show_usage(argc
, argv
);
276 err
= sscanf(argv
[2], "%u", &nr_writers
);
278 show_usage(argc
, argv
);
282 err
= sscanf(argv
[3], "%lu", &duration
);
284 show_usage(argc
, argv
);
288 for (i
= 4; i
< argc
; i
++) {
289 if (argv
[i
][0] != '-')
291 switch (argv
[i
][1]) {
293 rcu_debug_yield_enable(RCU_YIELD_READ
);
296 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
300 show_usage(argc
, argv
);
304 cpu_affinities
[next_aff
++] = a
;
306 printf_verbose("Adding CPU %d affinity\n", a
);
310 show_usage(argc
, argv
);
313 rduration
= atol(argv
[++i
]);
317 show_usage(argc
, argv
);
320 wdelay
= atol(argv
[++i
]);
324 show_usage(argc
, argv
);
327 wduration
= atol(argv
[++i
]);
335 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
336 duration
, nr_readers
, nr_writers
);
337 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
338 printf_verbose("Reader duration : %lu loops.\n", rduration
);
339 printf_verbose("thread %-6s, tid %lu\n",
340 "main", urcu_get_thread_id());
342 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
343 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
344 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
345 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
349 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
350 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
351 &count_reader
[i_thr
]);
355 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
356 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
357 (void *)(long)i_thr
);
370 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
371 err
= pthread_join(tid_reader
[i_thr
], &tret
);
374 tot_reads
+= count_reader
[i_thr
];
376 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
377 err
= pthread_join(tid_writer
[i_thr
], &tret
);
380 tot_writes
+= tot_nr_writes
[i_thr
];
383 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
385 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
387 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
388 argv
[0], duration
, nr_readers
, rduration
, wduration
,
389 nr_writers
, wdelay
, tot_reads
, tot_writes
,
390 tot_reads
+ tot_writes
);