4 * Userspace RCU library - test program
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>
43 /* hardcoded number of CPUs */
46 #if defined(_syscall0)
47 _syscall0(pid_t
, gettid
)
48 #elif defined(__NR_gettid)
49 static inline pid_t
gettid(void)
51 return syscall(__NR_gettid
);
54 #warning "use pid as tid"
55 static inline pid_t
gettid(void)
61 #ifndef DYNAMIC_LINK_TEST
64 #define debug_yield_read()
72 pthread_rwlock_t lock
= PTHREAD_RWLOCK_INITIALIZER
;
74 static volatile int test_go
, test_stop
;
76 static unsigned long wdelay
;
78 static volatile struct test_array test_array
= { 8 };
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 unsigned long long __thread nr_writes
;
160 static unsigned long long __thread nr_reads
;
162 static unsigned int nr_readers
;
163 static unsigned int nr_writers
;
165 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
167 void rcu_copy_mutex_lock(void)
170 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
172 perror("Error in pthread mutex lock");
177 void rcu_copy_mutex_unlock(void)
181 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
183 perror("Error in pthread mutex unlock");
188 void *thr_reader(void *_count
)
190 unsigned long long *count
= _count
;
192 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
193 "reader", pthread_self(), (unsigned long)gettid());
202 pthread_rwlock_rdlock(&lock
);
203 assert(test_array
.a
== 8);
204 if (caa_unlikely(rduration
))
205 loop_sleep(rduration
);
206 pthread_rwlock_unlock(&lock
);
208 if (caa_unlikely(!test_duration_read()))
213 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
214 "reader", pthread_self(), (unsigned long)gettid());
219 void *thr_writer(void *_count
)
221 unsigned long long *count
= _count
;
223 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
224 "writer", pthread_self(), (unsigned long)gettid());
234 pthread_rwlock_wrlock(&lock
);
237 if (caa_unlikely(wduration
))
238 loop_sleep(wduration
);
239 pthread_rwlock_unlock(&lock
);
241 if (caa_unlikely(!test_duration_write()))
243 if (caa_unlikely(wdelay
))
247 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
248 "writer", pthread_self(), (unsigned long)gettid());
253 void show_usage(int argc
, char **argv
)
255 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
257 printf(" [-r] [-w] (yield reader and/or writer)");
259 printf(" [-d delay] (writer period (us))");
260 printf(" [-c duration] (reader C.S. duration (in loops))");
261 printf(" [-e duration] (writer C.S. duration (in loops))");
262 printf(" [-v] (verbose output)");
263 printf(" [-a cpu#] [-a cpu#]... (affinity)");
267 int main(int argc
, char **argv
)
270 pthread_t
*tid_reader
, *tid_writer
;
272 unsigned long long *count_reader
, *count_writer
;
273 unsigned long long tot_reads
= 0, tot_writes
= 0;
277 show_usage(argc
, argv
);
282 err
= sscanf(argv
[1], "%u", &nr_readers
);
284 show_usage(argc
, argv
);
288 err
= sscanf(argv
[2], "%u", &nr_writers
);
290 show_usage(argc
, argv
);
294 err
= sscanf(argv
[3], "%lu", &duration
);
296 show_usage(argc
, argv
);
300 for (i
= 4; i
< argc
; i
++) {
301 if (argv
[i
][0] != '-')
303 switch (argv
[i
][1]) {
306 yield_active
|= YIELD_READ
;
309 yield_active
|= YIELD_WRITE
;
314 show_usage(argc
, argv
);
318 cpu_affinities
[next_aff
++] = a
;
320 printf_verbose("Adding CPU %d affinity\n", a
);
324 show_usage(argc
, argv
);
327 rduration
= atol(argv
[++i
]);
331 show_usage(argc
, argv
);
334 wdelay
= atol(argv
[++i
]);
338 show_usage(argc
, argv
);
341 wduration
= atol(argv
[++i
]);
349 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
350 duration
, nr_readers
, nr_writers
);
351 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
352 printf_verbose("Reader duration : %lu loops.\n", rduration
);
353 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
354 "main", pthread_self(), (unsigned long)gettid());
356 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
357 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
358 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
359 count_writer
= malloc(sizeof(*count_writer
) * nr_writers
);
363 for (i
= 0; i
< nr_readers
; i
++) {
364 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
369 for (i
= 0; i
< nr_writers
; i
++) {
370 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
384 for (i
= 0; i
< nr_readers
; i
++) {
385 err
= pthread_join(tid_reader
[i
], &tret
);
388 tot_reads
+= count_reader
[i
];
390 for (i
= 0; i
< nr_writers
; i
++) {
391 err
= pthread_join(tid_writer
[i
], &tret
);
394 tot_writes
+= count_writer
[i
];
397 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
399 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
401 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
402 argv
[0], duration
, nr_readers
, rduration
, wduration
,
403 nr_writers
, wdelay
, tot_reads
, tot_writes
,
404 tot_reads
+ tot_writes
);