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.
24 #include "../config.h"
29 #include <sys/types.h>
37 #include <urcu/arch.h>
38 #include <urcu/tls-compat.h>
44 /* hardcoded number of CPUs */
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-defer.h>
74 static volatile int test_go
, test_stop
;
76 static unsigned long wdelay
;
78 static struct test_array
*test_rcu_pointer
;
80 static unsigned long duration
;
82 /* read-side C.S. duration, in loops */
83 static unsigned long rduration
;
85 /* write-side C.S. duration, in loops */
86 static unsigned long wduration
;
88 static inline void loop_sleep(unsigned long l
)
94 static int verbose_mode
;
96 #define printf_verbose(fmt, args...) \
102 static unsigned int cpu_affinities
[NR_CPUS
];
103 static unsigned int next_aff
= 0;
104 static int use_affinity
= 0;
106 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
108 #ifndef HAVE_CPU_SET_T
109 typedef unsigned long cpu_set_t
;
110 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
111 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
114 static void set_affinity(void)
123 #if HAVE_SCHED_SETAFFINITY
124 ret
= pthread_mutex_lock(&affinity_mutex
);
126 perror("Error in pthread mutex lock");
129 cpu
= cpu_affinities
[next_aff
++];
130 ret
= pthread_mutex_unlock(&affinity_mutex
);
132 perror("Error in pthread mutex unlock");
138 #if SCHED_SETAFFINITY_ARGS == 2
139 sched_setaffinity(0, &mask
);
141 sched_setaffinity(0, sizeof(mask
), &mask
);
143 #endif /* HAVE_SCHED_SETAFFINITY */
147 * returns 0 if test should end.
149 static int test_duration_write(void)
154 static int test_duration_read(void)
159 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
160 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
163 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
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
;
194 struct test_array
*local_ptr
;
196 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
197 "reader", pthread_self(), (unsigned long)gettid());
201 rcu_register_thread();
210 local_ptr
= rcu_dereference(test_rcu_pointer
);
213 assert(local_ptr
->a
== 8);
214 if (caa_unlikely(rduration
))
215 loop_sleep(rduration
);
217 URCU_TLS(nr_reads
)++;
218 if (caa_unlikely(!test_duration_read()))
222 rcu_unregister_thread();
224 *count
= URCU_TLS(nr_reads
);
225 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
226 "reader", pthread_self(), (unsigned long)gettid());
231 static void test_cb2(void *data
)
235 static void test_cb1(void *data
)
239 void *thr_writer(void *data
)
241 unsigned long wtidx
= (unsigned long)data
;
242 struct test_array
*new, *old
= NULL
;
245 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
246 "writer", pthread_self(), (unsigned long)gettid());
250 ret
= rcu_defer_register_thread();
252 printf("Error in rcu_defer_register_thread\n");
262 new = malloc(sizeof(*new));
264 old
= rcu_xchg_pointer(&test_rcu_pointer
, new);
265 if (caa_unlikely(wduration
))
266 loop_sleep(wduration
);
267 defer_rcu(free
, old
);
268 defer_rcu(test_cb1
, old
);
269 defer_rcu(test_cb1
, (void *)-2L);
270 defer_rcu(test_cb1
, (void *)-2L);
271 defer_rcu(test_cb1
, old
);
272 defer_rcu(test_cb2
, (void *)-2L);
273 defer_rcu(test_cb2
, (void *)-4L);
274 defer_rcu(test_cb2
, (void *)-2L);
275 URCU_TLS(nr_writes
)++;
276 if (caa_unlikely(!test_duration_write()))
278 if (caa_unlikely(wdelay
))
282 rcu_defer_unregister_thread();
284 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
285 "writer", pthread_self(), (unsigned long)gettid());
286 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
290 void show_usage(int argc
, char **argv
)
292 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
294 printf(" [-r] [-w] (yield reader and/or writer)");
296 printf(" [-d delay] (writer period (us))");
297 printf(" [-c duration] (reader C.S. duration (in loops))");
298 printf(" [-e duration] (writer C.S. duration (in loops))");
299 printf(" [-v] (verbose output)");
300 printf(" [-a cpu#] [-a cpu#]... (affinity)");
304 int main(int argc
, char **argv
)
307 pthread_t
*tid_reader
, *tid_writer
;
309 unsigned long long *count_reader
;
310 unsigned long long tot_reads
= 0, tot_writes
= 0;
314 show_usage(argc
, argv
);
318 err
= sscanf(argv
[1], "%u", &nr_readers
);
320 show_usage(argc
, argv
);
324 err
= sscanf(argv
[2], "%u", &nr_writers
);
326 show_usage(argc
, argv
);
330 err
= sscanf(argv
[3], "%lu", &duration
);
332 show_usage(argc
, argv
);
336 for (i
= 4; i
< argc
; i
++) {
337 if (argv
[i
][0] != '-')
339 switch (argv
[i
][1]) {
342 yield_active
|= YIELD_READ
;
345 yield_active
|= YIELD_WRITE
;
350 show_usage(argc
, argv
);
354 cpu_affinities
[next_aff
++] = a
;
356 printf_verbose("Adding CPU %d affinity\n", a
);
360 show_usage(argc
, argv
);
363 rduration
= atol(argv
[++i
]);
367 show_usage(argc
, argv
);
370 wdelay
= atol(argv
[++i
]);
374 show_usage(argc
, argv
);
377 wduration
= atol(argv
[++i
]);
385 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
386 duration
, nr_readers
, nr_writers
);
387 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
388 printf_verbose("Reader duration : %lu loops.\n", rduration
);
389 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
390 "main", pthread_self(), (unsigned long)gettid());
392 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
393 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
394 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
395 tot_nr_writes
= malloc(sizeof(*tot_nr_writes
) * nr_writers
);
399 for (i
= 0; i
< nr_readers
; i
++) {
400 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
405 for (i
= 0; i
< nr_writers
; i
++) {
406 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
420 for (i
= 0; i
< nr_readers
; i
++) {
421 err
= pthread_join(tid_reader
[i
], &tret
);
424 tot_reads
+= count_reader
[i
];
426 for (i
= 0; i
< nr_writers
; i
++) {
427 err
= pthread_join(tid_writer
[i
], &tret
);
430 tot_writes
+= tot_nr_writes
[i
];
433 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
435 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
437 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
438 argv
[0], duration
, nr_readers
, rduration
, wduration
,
439 nr_writers
, wdelay
, tot_reads
, tot_writes
,
440 tot_reads
+ tot_writes
);