4 * Userspace RCU library - test program for RB tree
6 * Copyright February 2010 - 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>
34 #include <sys/syscall.h>
39 #include <urcu/arch.h>
41 /* hardcoded number of CPUs */
44 /* number of insert/delete */
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-rbtree.h>
69 #include <urcu-defer.h>
71 static struct rcu_rbtree_node
*rbtree_root
= &rcu_rbtree_nil
;
73 /* TODO: error handling testing for -ENOMEM */
74 struct rcu_rbtree_node
*rbtree_alloc(void)
76 return malloc(sizeof(struct rcu_rbtree_node
));
79 void rbtree_free(struct rcu_rbtree_node
*node
)
84 int tree_comp(void *a
, void *b
)
86 if ((unsigned long)a
< (unsigned long)b
)
88 else if ((unsigned long)a
> (unsigned long)b
)
94 static volatile int test_go
, test_stop
;
96 static unsigned long wdelay
;
98 static unsigned long duration
;
100 /* read-side C.S. duration, in loops */
101 static unsigned long rduration
;
103 /* write-side C.S. duration, in loops */
104 static unsigned long wduration
;
106 static inline void loop_sleep(unsigned long l
)
112 static int verbose_mode
;
114 #define printf_verbose(fmt, args...) \
120 static unsigned int cpu_affinities
[NR_CPUS
];
121 static unsigned int next_aff
= 0;
122 static int use_affinity
= 0;
124 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
126 #ifndef HAVE_CPU_SET_T
127 typedef unsigned long cpu_set_t
;
128 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
129 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
132 static void set_affinity(void)
141 #if HAVE_SCHED_SETAFFINITY
142 ret
= pthread_mutex_lock(&affinity_mutex
);
144 perror("Error in pthread mutex lock");
147 cpu
= cpu_affinities
[next_aff
++];
148 ret
= pthread_mutex_unlock(&affinity_mutex
);
150 perror("Error in pthread mutex unlock");
156 #if SCHED_SETAFFINITY_ARGS == 2
157 sched_setaffinity(0, &mask
);
159 sched_setaffinity(0, sizeof(mask
), &mask
);
161 #endif /* HAVE_SCHED_SETAFFINITY */
165 * returns 0 if test should end.
167 static int test_duration_write(void)
172 static int test_duration_read(void)
177 static unsigned long long __thread nr_writes
;
178 static unsigned long long __thread nr_reads
;
180 static unsigned int nr_readers
;
181 static unsigned int nr_writers
;
183 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
185 void rcu_copy_mutex_lock(void)
188 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
190 perror("Error in pthread mutex lock");
195 void rcu_copy_mutex_unlock(void)
199 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
201 perror("Error in pthread mutex unlock");
206 void *thr_reader(void *_count
)
208 unsigned long long *count
= _count
;
210 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
211 "reader", pthread_self(), (unsigned long)gettid());
215 rcu_register_thread();
226 if (unlikely(rduration
))
227 loop_sleep(rduration
);
230 if (unlikely(!test_duration_read()))
234 rcu_unregister_thread();
236 /* test extra thread registration */
237 rcu_register_thread();
238 rcu_unregister_thread();
241 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
242 "reader", pthread_self(), (unsigned long)gettid());
247 void *thr_writer(void *_count
)
249 unsigned long long *count
= _count
;
250 struct rcu_rbtree_node
*node
;
254 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
255 "writer", pthread_self(), (unsigned long)gettid());
259 rcu_defer_register_thread();
267 rcu_copy_mutex_lock();
269 for (i
= 0; i
< NR_RAND
; i
++) {
270 node
= rbtree_alloc();
271 key
[i
] = (void *)(unsigned long)(rand() % 2048);
273 rcu_rbtree_insert(&rbtree_root
, node
, tree_comp
,
274 rbtree_alloc
, rbtree_free
);
277 if (unlikely(wduration
))
278 loop_sleep(wduration
);
280 for (i
= 0; i
< NR_RAND
; i
++) {
281 node
= rcu_rbtree_search(rbtree_root
, key
[i
],
283 assert(node
!= &rcu_rbtree_nil
);
284 rcu_rbtree_remove(&rbtree_root
, node
, tree_comp
,
285 rbtree_alloc
, rbtree_free
);
286 defer_rcu((void (*)(void *))rbtree_free
, node
);
289 rcu_copy_mutex_unlock();
291 if (unlikely(!test_duration_write()))
293 if (unlikely(wdelay
))
297 rcu_defer_unregister_thread();
299 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
300 "writer", pthread_self(), (unsigned long)gettid());
305 void show_usage(int argc
, char **argv
)
307 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
309 printf(" [-r] [-w] (yield reader and/or writer)");
311 printf(" [-d delay] (writer period (us))");
312 printf(" [-c duration] (reader C.S. duration (in loops))");
313 printf(" [-e duration] (writer C.S. duration (in loops))");
314 printf(" [-v] (verbose output)");
315 printf(" [-a cpu#] [-a cpu#]... (affinity)");
319 int main(int argc
, char **argv
)
322 pthread_t
*tid_reader
, *tid_writer
;
324 unsigned long long *count_reader
, *count_writer
;
325 unsigned long long tot_reads
= 0, tot_writes
= 0;
329 show_usage(argc
, argv
);
333 err
= sscanf(argv
[1], "%u", &nr_readers
);
335 show_usage(argc
, argv
);
339 err
= sscanf(argv
[2], "%u", &nr_writers
);
341 show_usage(argc
, argv
);
345 err
= sscanf(argv
[3], "%lu", &duration
);
347 show_usage(argc
, argv
);
351 for (i
= 4; i
< argc
; i
++) {
352 if (argv
[i
][0] != '-')
354 switch (argv
[i
][1]) {
357 yield_active
|= YIELD_READ
;
360 yield_active
|= YIELD_WRITE
;
365 show_usage(argc
, argv
);
369 cpu_affinities
[next_aff
++] = a
;
371 printf_verbose("Adding CPU %d affinity\n", a
);
375 show_usage(argc
, argv
);
378 rduration
= atol(argv
[++i
]);
382 show_usage(argc
, argv
);
385 wdelay
= atol(argv
[++i
]);
389 show_usage(argc
, argv
);
392 wduration
= atol(argv
[++i
]);
400 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
401 duration
, nr_readers
, nr_writers
);
402 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
403 printf_verbose("Reader duration : %lu loops.\n", rduration
);
404 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
405 "main", pthread_self(), (unsigned long)gettid());
407 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
408 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
409 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
410 count_writer
= malloc(sizeof(*count_writer
) * nr_writers
);
416 for (i
= 0; i
< nr_readers
; i
++) {
417 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
422 for (i
= 0; i
< nr_writers
; i
++) {
423 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
437 for (i
= 0; i
< nr_readers
; i
++) {
438 err
= pthread_join(tid_reader
[i
], &tret
);
441 tot_reads
+= count_reader
[i
];
443 for (i
= 0; i
< nr_writers
; i
++) {
444 err
= pthread_join(tid_writer
[i
], &tret
);
447 tot_writes
+= count_writer
[i
];
450 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
452 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
454 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
455 argv
[0], duration
, nr_readers
, rduration
, wduration
,
456 nr_writers
, wdelay
, tot_reads
, tot_writes
,
457 tot_reads
+ tot_writes
);