4 * Userspace RCU library - test program (with baatch 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 */
43 #include <urcu-qsbr.h>
49 static volatile int test_go
, test_stop
;
51 static unsigned long wdelay
;
53 static struct test_array
*test_rcu_pointer
;
55 static unsigned long duration
;
57 /* read-side C.S. duration, in loops */
58 static unsigned long rduration
;
59 static long reclaim_batch
= 1;
61 struct reclaim_queue
{
62 void **queue
; /* Beginning of queue */
63 void **head
; /* Insert position */
66 static struct reclaim_queue
*pending_reclaims
;
69 /* write-side C.S. duration, in loops */
70 static unsigned long wduration
;
72 static inline void loop_sleep(unsigned long loops
)
78 static int verbose_mode
;
80 #define printf_verbose(fmt, args...) \
86 static unsigned int cpu_affinities
[NR_CPUS
];
87 static unsigned int next_aff
= 0;
88 static int use_affinity
= 0;
90 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
92 static void set_affinity(void)
94 #if HAVE_SCHED_SETAFFINITY
97 #endif /* HAVE_SCHED_SETAFFINITY */
102 #if HAVE_SCHED_SETAFFINITY
103 ret
= pthread_mutex_lock(&affinity_mutex
);
105 perror("Error in pthread mutex lock");
108 cpu
= cpu_affinities
[next_aff
++];
109 ret
= pthread_mutex_unlock(&affinity_mutex
);
111 perror("Error in pthread mutex unlock");
117 sched_setaffinity(0, sizeof(mask
), &mask
);
118 #endif /* HAVE_SCHED_SETAFFINITY */
122 * returns 0 if test should end.
124 static int test_duration_write(void)
129 static int test_duration_read(void)
134 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
135 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
137 static unsigned int nr_readers
;
138 static unsigned int nr_writers
;
140 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
142 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
145 void rcu_copy_mutex_lock(void)
148 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
150 perror("Error in pthread mutex lock");
155 void rcu_copy_mutex_unlock(void)
159 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
161 perror("Error in pthread mutex unlock");
166 void *thr_reader(void *_count
)
168 unsigned long long *count
= _count
;
169 struct test_array
*local_ptr
;
171 printf_verbose("thread_begin %s, tid %lu\n",
172 "reader", urcu_get_thread_id());
176 rcu_register_thread();
185 local_ptr
= _rcu_dereference(test_rcu_pointer
);
186 rcu_debug_yield_read();
188 assert(local_ptr
->a
== 8);
189 if (caa_unlikely(rduration
))
190 loop_sleep(rduration
);
192 URCU_TLS(nr_reads
)++;
193 /* QS each 1024 reads */
194 if (caa_unlikely((URCU_TLS(nr_reads
) & ((1 << 10) - 1)) == 0))
195 _rcu_quiescent_state();
196 if (caa_unlikely(!test_duration_read()))
200 rcu_unregister_thread();
202 *count
= URCU_TLS(nr_reads
);
203 printf_verbose("thread_end %s, tid %lu\n",
204 "reader", urcu_get_thread_id());
209 static void rcu_gc_clear_queue(unsigned long wtidx
)
213 /* Wait for Q.S and empty queue */
216 for (p
= pending_reclaims
[wtidx
].queue
;
217 p
< pending_reclaims
[wtidx
].head
; p
++) {
220 ((struct test_array
*)*p
)->a
= 0;
223 pending_reclaims
[wtidx
].head
= pending_reclaims
[wtidx
].queue
;
226 /* Using per-thread queue */
227 static void rcu_gc_reclaim(unsigned long wtidx
, void *old
)
230 *pending_reclaims
[wtidx
].head
= old
;
231 pending_reclaims
[wtidx
].head
++;
233 if (caa_likely(pending_reclaims
[wtidx
].head
- pending_reclaims
[wtidx
].queue
237 rcu_gc_clear_queue(wtidx
);
240 void *thr_writer(void *data
)
242 unsigned long wtidx
= (unsigned long)data
;
244 struct test_array
*old
= NULL
;
246 struct test_array
*new, *old
;
249 printf_verbose("thread_begin %s, tid %lu\n",
250 "writer", urcu_get_thread_id());
260 #ifndef TEST_LOCAL_GC
261 new = malloc(sizeof(*new));
263 old
= _rcu_xchg_pointer(&test_rcu_pointer
, new);
265 if (caa_unlikely(wduration
))
266 loop_sleep(wduration
);
267 rcu_gc_reclaim(wtidx
, old
);
268 URCU_TLS(nr_writes
)++;
269 if (caa_unlikely(!test_duration_write()))
271 if (caa_unlikely(wdelay
))
275 printf_verbose("thread_end %s, tid %lu\n",
276 "writer", urcu_get_thread_id());
277 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
281 void show_usage(int argc
, char **argv
)
283 printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
285 printf("OPTIONS:\n");
286 printf(" [-r] [-w] (yield reader and/or writer)\n");
287 printf(" [-b batch] (batch reclaim)\n");
288 printf(" [-d delay] (writer period (us))\n");
289 printf(" [-c duration] (reader C.S. duration (in loops))\n");
290 printf(" [-e duration] (writer C.S. duration (in loops))\n");
291 printf(" [-v] (verbose output)\n");
292 printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
296 int main(int argc
, char **argv
)
299 pthread_t
*tid_reader
, *tid_writer
;
301 unsigned long long *count_reader
;
302 unsigned long long tot_reads
= 0, tot_writes
= 0;
307 show_usage(argc
, argv
);
311 err
= sscanf(argv
[1], "%u", &nr_readers
);
313 show_usage(argc
, argv
);
317 err
= sscanf(argv
[2], "%u", &nr_writers
);
319 show_usage(argc
, argv
);
323 err
= sscanf(argv
[3], "%lu", &duration
);
325 show_usage(argc
, argv
);
329 for (i
= 4; i
< argc
; i
++) {
330 if (argv
[i
][0] != '-')
332 switch (argv
[i
][1]) {
334 rcu_debug_yield_enable(RCU_YIELD_READ
);
337 rcu_debug_yield_enable(RCU_YIELD_WRITE
);
341 show_usage(argc
, argv
);
345 cpu_affinities
[next_aff
++] = a
;
347 printf_verbose("Adding CPU %d affinity\n", a
);
351 show_usage(argc
, argv
);
354 reclaim_batch
= atol(argv
[++i
]);
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, tid %lu\n",
388 "main", urcu_get_thread_id());
390 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
391 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
392 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
393 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
394 pending_reclaims
= calloc(nr_writers
, sizeof(*pending_reclaims
));
395 if (reclaim_batch
* sizeof(*pending_reclaims
[0].queue
)
396 < CAA_CACHE_LINE_SIZE
)
397 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++)
398 pending_reclaims
[i_thr
].queue
= calloc(1, CAA_CACHE_LINE_SIZE
);
400 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++)
401 pending_reclaims
[i_thr
].queue
= calloc(reclaim_batch
,
402 sizeof(*pending_reclaims
[i_thr
].queue
));
403 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++)
404 pending_reclaims
[i_thr
].head
= pending_reclaims
[i_thr
].queue
;
408 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
409 err
= pthread_create(&tid_reader
[i_thr
], NULL
, thr_reader
,
410 &count_reader
[i_thr
]);
414 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
415 err
= pthread_create(&tid_writer
[i_thr
], NULL
, thr_writer
,
416 (void *)(long)i_thr
);
429 for (i_thr
= 0; i_thr
< nr_readers
; i_thr
++) {
430 err
= pthread_join(tid_reader
[i_thr
], &tret
);
433 tot_reads
+= count_reader
[i_thr
];
435 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++) {
436 err
= pthread_join(tid_writer
[i_thr
], &tret
);
439 tot_writes
+= tot_nr_writes
[i_thr
];
440 rcu_gc_clear_queue(i_thr
);
443 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
445 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
447 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu "
449 argv
[0], duration
, nr_readers
, rduration
, wduration
,
450 nr_writers
, wdelay
, tot_reads
, tot_writes
,
451 tot_reads
+ tot_writes
, reclaim_batch
);
458 for (i_thr
= 0; i_thr
< nr_writers
; i_thr
++)
459 free(pending_reclaims
[i_thr
].queue
);
460 free(pending_reclaims
);