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>
38 #include <urcu/arch.h>
40 /* hardcoded number of CPUs */
43 #if defined(_syscall0)
44 _syscall0(pid_t
, gettid
)
45 #elif defined(__NR_gettid)
46 static inline pid_t
gettid(void)
48 return syscall(__NR_gettid
);
51 #warning "use pid as tid"
52 static inline pid_t
gettid(void)
58 #ifndef DYNAMIC_LINK_TEST
61 #define debug_yield_read()
64 #include <urcu-rbtree.h>
66 static struct rcu_rbtree_node
*rbtree_root
;
68 /* TODO: error handling testing for -ENOMEM */
69 struct rcu_rbtree_node
*rbtree_alloc(void)
71 return malloc(sizeof(struct rcu_rbtree_node
));
74 struct rcu_rbtree_node
*rbtree_free(struct rcu_rbtree_node
*node
)
79 static volatile int test_go
, test_stop
;
81 static unsigned long wdelay
;
83 static unsigned long duration
;
85 /* read-side C.S. duration, in loops */
86 static unsigned long rduration
;
88 /* write-side C.S. duration, in loops */
89 static unsigned long wduration
;
91 static inline void loop_sleep(unsigned long l
)
97 static int verbose_mode
;
99 #define printf_verbose(fmt, args...) \
105 static unsigned int cpu_affinities
[NR_CPUS
];
106 static unsigned int next_aff
= 0;
107 static int use_affinity
= 0;
109 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
111 #ifndef HAVE_CPU_SET_T
112 typedef unsigned long cpu_set_t
;
113 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
114 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
117 static void set_affinity(void)
126 #if HAVE_SCHED_SETAFFINITY
127 ret
= pthread_mutex_lock(&affinity_mutex
);
129 perror("Error in pthread mutex lock");
132 cpu
= cpu_affinities
[next_aff
++];
133 ret
= pthread_mutex_unlock(&affinity_mutex
);
135 perror("Error in pthread mutex unlock");
141 #if SCHED_SETAFFINITY_ARGS == 2
142 sched_setaffinity(0, &mask
);
144 sched_setaffinity(0, sizeof(mask
), &mask
);
146 #endif /* HAVE_SCHED_SETAFFINITY */
150 * returns 0 if test should end.
152 static int test_duration_write(void)
157 static int test_duration_read(void)
162 static unsigned long long __thread nr_writes
;
163 static unsigned long long __thread nr_reads
;
165 static unsigned int nr_readers
;
166 static unsigned int nr_writers
;
168 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
170 void rcu_copy_mutex_lock(void)
173 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
175 perror("Error in pthread mutex lock");
180 void rcu_copy_mutex_unlock(void)
184 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
186 perror("Error in pthread mutex unlock");
191 void *thr_reader(void *_count
)
193 unsigned long long *count
= _count
;
195 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
196 "reader", pthread_self(), (unsigned long)gettid());
200 rcu_register_thread();
211 if (unlikely(rduration
))
212 loop_sleep(rduration
);
215 if (unlikely(!test_duration_read()))
219 rcu_unregister_thread();
221 /* test extra thread registration */
222 rcu_register_thread();
223 rcu_unregister_thread();
226 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
227 "reader", pthread_self(), (unsigned long)gettid());
232 void *thr_writer(void *_count
)
234 unsigned long long *count
= _count
;
236 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
237 "writer", pthread_self(), (unsigned long)gettid());
248 if (unlikely(wduration
))
249 loop_sleep(wduration
);
252 if (unlikely(!test_duration_write()))
254 if (unlikely(wdelay
))
258 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
259 "writer", pthread_self(), (unsigned long)gettid());
264 void show_usage(int argc
, char **argv
)
266 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
268 printf(" [-r] [-w] (yield reader and/or writer)");
270 printf(" [-d delay] (writer period (us))");
271 printf(" [-c duration] (reader C.S. duration (in loops))");
272 printf(" [-e duration] (writer C.S. duration (in loops))");
273 printf(" [-v] (verbose output)");
274 printf(" [-a cpu#] [-a cpu#]... (affinity)");
278 int main(int argc
, char **argv
)
281 pthread_t
*tid_reader
, *tid_writer
;
283 unsigned long long *count_reader
, *count_writer
;
284 unsigned long long tot_reads
= 0, tot_writes
= 0;
288 show_usage(argc
, argv
);
292 err
= sscanf(argv
[1], "%u", &nr_readers
);
294 show_usage(argc
, argv
);
298 err
= sscanf(argv
[2], "%u", &nr_writers
);
300 show_usage(argc
, argv
);
304 err
= sscanf(argv
[3], "%lu", &duration
);
306 show_usage(argc
, argv
);
310 for (i
= 4; i
< argc
; i
++) {
311 if (argv
[i
][0] != '-')
313 switch (argv
[i
][1]) {
316 yield_active
|= YIELD_READ
;
319 yield_active
|= YIELD_WRITE
;
324 show_usage(argc
, argv
);
328 cpu_affinities
[next_aff
++] = a
;
330 printf_verbose("Adding CPU %d affinity\n", a
);
334 show_usage(argc
, argv
);
337 rduration
= atol(argv
[++i
]);
341 show_usage(argc
, argv
);
344 wdelay
= atol(argv
[++i
]);
348 show_usage(argc
, argv
);
351 wduration
= atol(argv
[++i
]);
359 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
360 duration
, nr_readers
, nr_writers
);
361 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
362 printf_verbose("Reader duration : %lu loops.\n", rduration
);
363 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
364 "main", pthread_self(), (unsigned long)gettid());
366 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
367 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
368 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
369 count_writer
= malloc(sizeof(*count_writer
) * nr_writers
);
373 for (i
= 0; i
< nr_readers
; i
++) {
374 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
379 for (i
= 0; i
< nr_writers
; i
++) {
380 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
394 for (i
= 0; i
< nr_readers
; i
++) {
395 err
= pthread_join(tid_reader
[i
], &tret
);
398 tot_reads
+= count_reader
[i
];
400 for (i
= 0; i
< nr_writers
; i
++) {
401 err
= pthread_join(tid_writer
[i
], &tret
);
404 tot_writes
+= count_writer
[i
];
407 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
409 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
411 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
412 argv
[0], duration
, nr_readers
, rduration
, wduration
,
413 nr_writers
, wdelay
, tot_reads
, tot_writes
,
414 tot_reads
+ tot_writes
);