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>
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()
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 loops
)
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 #ifndef HAVE_CPU_SET_T
110 typedef unsigned long cpu_set_t
;
111 # define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
112 # define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
115 static void set_affinity(void)
117 #if HAVE_SCHED_SETAFFINITY
120 #endif /* HAVE_SCHED_SETAFFINITY */
125 #if HAVE_SCHED_SETAFFINITY
126 ret
= pthread_mutex_lock(&affinity_mutex
);
128 perror("Error in pthread mutex lock");
131 cpu
= cpu_affinities
[next_aff
++];
132 ret
= pthread_mutex_unlock(&affinity_mutex
);
134 perror("Error in pthread mutex unlock");
139 #if SCHED_SETAFFINITY_ARGS == 2
140 sched_setaffinity(0, &mask
);
142 sched_setaffinity(0, sizeof(mask
), &mask
);
144 #endif /* HAVE_SCHED_SETAFFINITY */
148 * returns 0 if test should end.
150 static int test_duration_write(void)
155 static int test_duration_read(void)
160 static DEFINE_URCU_TLS(unsigned long long, nr_writes
);
161 static DEFINE_URCU_TLS(unsigned long long, nr_reads
);
164 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_writes
;
166 unsigned long long __attribute__((aligned(CAA_CACHE_LINE_SIZE
))) *tot_nr_reads
;
168 static unsigned int nr_readers
;
169 static unsigned int nr_writers
;
171 pthread_mutex_t rcu_copy_mutex
= PTHREAD_MUTEX_INITIALIZER
;
173 void rcu_copy_mutex_lock(void)
176 ret
= pthread_mutex_lock(&rcu_copy_mutex
);
178 perror("Error in pthread mutex lock");
183 void rcu_copy_mutex_unlock(void)
187 ret
= pthread_mutex_unlock(&rcu_copy_mutex
);
189 perror("Error in pthread mutex unlock");
194 void *thr_reader(void *data
)
196 unsigned long tidx
= (unsigned long)data
;
198 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
199 "reader", (unsigned long) pthread_self(),
200 (unsigned long) gettid());
209 pthread_mutex_lock(&lock
);
210 assert(test_array
.a
== 8);
211 if (caa_unlikely(rduration
))
212 loop_sleep(rduration
);
213 pthread_mutex_unlock(&lock
);
214 URCU_TLS(nr_reads
)++;
215 if (caa_unlikely(!test_duration_read()))
219 tot_nr_reads
[tidx
] = URCU_TLS(nr_reads
);
220 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
221 "reader", (unsigned long) pthread_self(),
222 (unsigned long) gettid());
227 void *thr_writer(void *data
)
229 unsigned long wtidx
= (unsigned long)data
;
231 printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
232 "writer", (unsigned long) pthread_self(),
233 (unsigned long) gettid());
243 pthread_mutex_lock(&lock
);
246 if (caa_unlikely(wduration
))
247 loop_sleep(wduration
);
248 pthread_mutex_unlock(&lock
);
249 URCU_TLS(nr_writes
)++;
250 if (caa_unlikely(!test_duration_write()))
252 if (caa_unlikely(wdelay
))
256 printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
257 "writer", (unsigned long) pthread_self(),
258 (unsigned long) gettid());
259 tot_nr_writes
[wtidx
] = URCU_TLS(nr_writes
);
263 void show_usage(int argc
, char **argv
)
265 printf("Usage : %s nr_readers nr_writers duration (s)", argv
[0]);
267 printf(" [-r] [-w] (yield reader and/or writer)");
269 printf(" [-d delay] (writer period (us))");
270 printf(" [-c duration] (reader C.S. duration (in loops))");
271 printf(" [-e duration] (writer C.S. duration (in loops))");
272 printf(" [-v] (verbose output)");
273 printf(" [-a cpu#] [-a cpu#]... (affinity)");
277 int main(int argc
, char **argv
)
280 pthread_t
*tid_reader
, *tid_writer
;
282 unsigned long long *count_reader
, *count_writer
;
283 unsigned long long tot_reads
= 0, tot_writes
= 0;
287 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", (unsigned long) pthread_self(),
365 (unsigned long) gettid());
367 tid_reader
= malloc(sizeof(*tid_reader
) * nr_readers
);
368 tid_writer
= malloc(sizeof(*tid_writer
) * nr_writers
);
369 count_reader
= malloc(sizeof(*count_reader
) * nr_readers
);
370 count_writer
= malloc(sizeof(*count_writer
) * nr_writers
);
371 tot_nr_reads
= malloc(sizeof(*tot_nr_reads
) * nr_readers
);
372 tot_nr_writes
= malloc(sizeof(*tot_nr_writes
) * nr_writers
);
376 for (i
= 0; i
< nr_readers
; i
++) {
377 err
= pthread_create(&tid_reader
[i
], NULL
, thr_reader
,
382 for (i
= 0; i
< nr_writers
; i
++) {
383 err
= pthread_create(&tid_writer
[i
], NULL
, thr_writer
,
397 for (i
= 0; i
< nr_readers
; i
++) {
398 err
= pthread_join(tid_reader
[i
], &tret
);
401 tot_reads
+= tot_nr_reads
[i
];
403 for (i
= 0; i
< nr_writers
; i
++) {
404 err
= pthread_join(tid_writer
[i
], &tret
);
407 tot_writes
+= tot_nr_writes
[i
];
410 printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads
,
412 printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu wdur %6lu "
414 "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
415 argv
[0], duration
, nr_readers
, rduration
, wduration
,
416 nr_writers
, wdelay
, tot_reads
, tot_writes
,
417 tot_reads
+ tot_writes
);