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>
36 #include <urcu/arch.h>
37 #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()
73 static pthread_mutex_t lock
;
75 static volatile int test_go
, test_stop
;
77 static unsigned long wdelay
;
79 static volatile struct test_array test_array
= { 8 };
81 static unsigned long duration
;
83 /* read-side C.S. duration, in loops */
84 static unsigned long rduration
;
86 /* write-side C.S. duration, in loops */
87 static unsigned long wduration
;
89 static inline void loop_sleep(unsigned long l
)
95 static int verbose_mode
;
97 #define printf_verbose(fmt, args...) \
103 static unsigned int cpu_affinities
[NR_CPUS
];
104 static unsigned int next_aff
= 0;
105 static int use_affinity
= 0;
107 pthread_mutex_t affinity_mutex
= PTHREAD_MUTEX_INITIALIZER
;
109 static void set_affinity(void)
118 #if HAVE_SCHED_SETAFFINITY
119 ret
= pthread_mutex_lock(&affinity_mutex
);
121 perror("Error in pthread mutex lock");
124 cpu
= cpu_affinities
[next_aff
++];
125 ret
= pthread_mutex_unlock(&affinity_mutex
);
127 perror("Error in pthread mutex unlock");
132 #if SCHED_SETAFFINITY_ARGS == 2
133 sched_setaffinity(0, &mask
);
135 sched_setaffinity(0, sizeof(mask
), &mask
);
137 #endif /* HAVE_SCHED_SETAFFINITY */
141 * returns 0 if test should end.
143 static int test_duration_write(void)
148 static int test_duration_read(void)
153 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
154 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
157 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
159 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
161 static unsigned int nr_readers
;
162 static unsigned int nr_writers
;
164 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
166 void rcu_copy_mutex_lock(void)
169 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
171 perror("Error in pthread mutex lock");
176 void rcu_copy_mutex_unlock(void)
180 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
182 perror("Error in pthread mutex unlock");
187 void *thr_reader(void *data
)
189 unsigned long tidx
= (unsigned long)data
;
191 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
192 "reader", (unsigned long) pthread_self(),
193 (unsigned long) gettid());
202 pthread_mutex_lock(&lock
);
203 assert(test_array
.a
== 8);
204 if (caa_unlikely(rduration
))
205 loop_sleep(rduration
);
206 pthread_mutex_unlock(&lock
);
207 URCU_TLS(nr_reads
)++;
208 if (caa_unlikely(!test_duration_read()))
212 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
213 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
214 "reader", (unsigned long) pthread_self(),
215 (unsigned long) gettid());
220 void *thr_writer(void *data
)
222 unsigned long wtidx
= (unsigned long)data
;
224 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
225 "writer", (unsigned long) pthread_self(),
226 (unsigned long) gettid());
236 pthread_mutex_lock(&lock
);
239 if (caa_unlikely(wduration
))
240 loop_sleep(wduration
);
241 pthread_mutex_unlock(&lock
);
242 URCU_TLS(nr_writes
)++;
243 if (caa_unlikely(!test_duration_write()))
245 if (caa_unlikely(wdelay
))
249 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
250 "writer", (unsigned long) pthread_self(),
251 (unsigned long) gettid());
252 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
256 void show_usage(int argc
, char **argv
)
258 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
260 printf(" [-r] [-w] (yield reader and/or writer)");
262 printf(" [-d delay] (writer period (us))");
263 printf(" [-c duration] (reader C.S. duration (in loops))");
264 printf(" [-e duration] (writer C.S. duration (in loops))");
265 printf(" [-v] (verbose output)");
266 printf(" [-a cpu#] [-a cpu#]... (affinity)");
270 int main(int argc
, char **argv
)
273 pthread_t
*tid_reader
, *tid_writer
;
275 unsigned long long *count_reader
, *count_writer
;
276 unsigned long long tot_reads
= 0, tot_writes
= 0;
280 show_usage(argc
, argv
);
285 err
= sscanf(argv
[1], "%u", &nr_readers
);
287 show_usage(argc
, argv
);
291 err
= sscanf(argv
[2], "%u", &nr_writers
);
293 show_usage(argc
, argv
);
297 err
= sscanf(argv
[3], "%lu", &duration
);
299 show_usage(argc
, argv
);
303 for (i
= 4; i
< argc
; i
++) {
304 if (argv
[i
][0] != '-')
306 switch (argv
[i
][1]) {
309 yield_active
|= YIELD_READ
;
312 yield_active
|= YIELD_WRITE
;
317 show_usage(argc
, argv
);
321 cpu_affinities
[next_aff
++] = a
;
323 printf_verbose("Adding CPU %d affinity\n", a
);
327 show_usage(argc
, argv
);
330 rduration
= atol(argv
[++i
]);
334 show_usage(argc
, argv
);
337 wdelay
= atol(argv
[++i
]);
341 show_usage(argc
, argv
);
344 wduration
= atol(argv
[++i
]);
352 printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
353 duration
, nr_readers
, nr_writers
);
354 printf_verbose("Writer delay : %lu loops.\n", wdelay
);
355 printf_verbose("Reader duration : %lu loops.\n", rduration
);
356 printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
357 "main", (unsigned long) pthread_self(),
358 (unsigned long) gettid());
360 tid_reader
= calloc(nr_readers
, sizeof(*tid_reader
));
361 tid_writer
= calloc(nr_writers
, sizeof(*tid_writer
));
362 count_reader
= calloc(nr_readers
, sizeof(*count_reader
));
363 count_writer
= calloc(nr_writers
, sizeof(*count_writer
));
364 tot_nr_reads
= calloc(nr_readers
, sizeof(*tot_nr_reads
));
365 tot_nr_writes
= calloc(nr_writers
, sizeof(*tot_nr_writes
));
369 for (i
= 0; i
< nr_readers
; i
++) {
370 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
375 for (i
= 0; i
< nr_writers
; i
++) {
376 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
390 for (i
= 0; i
< nr_readers
; i
++) {
391 err
= pthread_join(tid_reader
[i
], &tret
);
394 tot_reads
+= tot_nr_reads
[i
];
396 for (i
= 0; i
< nr_writers
; i
++) {
397 err
= pthread_join(tid_writer
[i
], &tret
);
400 tot_writes
+= tot_nr_writes
[i
];
403 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
405 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
407 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
408 argv
[0], duration
, nr_readers
, rduration
, wduration
,
409 nr_writers
, wdelay
, tot_reads
, tot_writes
,
410 tot_reads
+ tot_writes
);