*
* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
*
- * Distributed under GPLv2
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#define _GNU_SOURCE
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <sys/syscall.h>
+#include <sched.h>
+
+#include "arch.h"
+
+/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
+#define CACHE_LINE_SIZE 4096
#if defined(_syscall0)
_syscall0(pid_t, gettid)
}
#endif
+#ifndef DYNAMIC_LINK_TEST
+#define _LGPL_SOURCE
+#else
+#define debug_yield_read()
+#endif
#include "urcu.h"
struct test_array {
int a;
};
-static int no_writer_delay;
+static volatile int test_go, test_stop;
+
+static unsigned long wdelay;
static struct test_array *test_rcu_pointer;
static unsigned long duration;
-static time_t start_time;
-static unsigned long __thread duration_interval;
-#define DURATION_TEST_DELAY 100
+
+/* read-side C.S. duration, in loops */
+static unsigned long rduration;
+
+static inline void loop_sleep(unsigned long l)
+{
+ while(l-- != 0)
+ cpu_relax();
+}
+
+static int verbose_mode;
+
+#define printf_verbose(fmt, args...) \
+ do { \
+ if (verbose_mode) \
+ printf(fmt, args); \
+ } while (0)
/*
* returns 0 if test should end.
*/
-static int test_duration(void)
+static int test_duration_write(void)
{
- if (duration_interval++ >= DURATION_TEST_DELAY) {
- duration_interval = 0;
- if (time(NULL) - start_time >= duration)
- return 0;
- }
- return 1;
+ return !test_stop;
+}
+
+static int test_duration_read(void)
+{
+ return !test_stop;
}
-#define NR_READ 10
-#define NR_WRITE 9
+static unsigned long long __thread nr_writes;
+static unsigned long long __thread nr_reads;
+
+static unsigned int nr_readers;
+static unsigned int nr_writers;
pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
/*
* malloc/free are reusing memory areas too quickly, which does not let us
* test races appropriately. Use a large circular array for allocations.
- * ARRAY_SIZE is larger than NR_WRITE, which insures we never run over our tail.
+ * ARRAY_SIZE is larger than nr_writers, which insures we never run over our tail.
*/
-#define ARRAY_SIZE (1048576 * NR_WRITE)
+#define ARRAY_SIZE (1048576 * nr_writers)
#define ARRAY_POISON 0xDEADBEEF
static int array_index;
-static struct test_array test_array[ARRAY_SIZE];
+static struct test_array *test_array;
static struct test_array *test_array_alloc(void)
{
rcu_copy_mutex_unlock();
}
-void *thr_reader(void *arg)
+void *thr_reader(void *_count)
{
+ unsigned long long *count = _count;
struct test_array *local_ptr;
- printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
"reader", pthread_self(), (unsigned long)gettid());
- urcu_register_thread();
+ rcu_register_thread();
+
+ while (!test_go)
+ {
+ }
+ smp_mb();
for (;;) {
rcu_read_lock();
debug_yield_read();
if (local_ptr)
assert(local_ptr->a == 8);
+ if (unlikely(rduration))
+ loop_sleep(rduration);
rcu_read_unlock();
- if (!test_duration())
+ nr_reads++;
+ if (unlikely(!test_duration_read()))
break;
}
- urcu_unregister_thread();
+ rcu_unregister_thread();
- printf("thread_end %s, thread id : %lx, tid %lu\n",
+ *count = nr_reads;
+ printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
"reader", pthread_self(), (unsigned long)gettid());
return ((void*)1);
}
-void *thr_writer(void *arg)
+void *thr_writer(void *_count)
{
+ unsigned long long *count = _count;
struct test_array *new, *old;
- printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
"writer", pthread_self(), (unsigned long)gettid());
+ while (!test_go)
+ {
+ }
+ smp_mb();
+
for (;;) {
new = test_array_alloc();
rcu_copy_mutex_lock();
if (old)
assert(old->a == 8);
new->a = 8;
- old = urcu_publish_content(&test_rcu_pointer, new);
+ old = rcu_publish_content(&test_rcu_pointer, new);
rcu_copy_mutex_unlock();
/* can be done after unlock */
if (old)
old->a = 0;
test_array_free(old);
- if (!test_duration())
+ nr_writes++;
+ if (unlikely(!test_duration_write()))
break;
- if (!no_writer_delay)
- usleep(1);
+ if (unlikely(wdelay))
+ loop_sleep(wdelay);
}
- printf("thread_end %s, thread id : %lx, tid %lu\n",
+ printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
"writer", pthread_self(), (unsigned long)gettid());
+ *count = nr_writes;
return ((void*)2);
}
void show_usage(int argc, char **argv)
{
- printf("Usage : %s duration (s)", argv[0]);
+ printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
#ifdef DEBUG_YIELD
printf(" [-r] [-w] (yield reader and/or writer)");
#endif
- printf(" [-n] (disable writer delay)");
+ printf(" [-d delay] (writer period (us))");
+ printf(" [-c duration] (reader C.S. duration (in loops))");
+ printf(" [-v] (verbose output)");
+ printf(" [-a cpu#] [-a cpu#]... (affinity)");
printf("\n");
}
+cpu_set_t affinity;
+
int main(int argc, char **argv)
{
int err;
- pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
+ pthread_t *tid_reader, *tid_writer;
void *tret;
- int i;
+ unsigned long long *count_reader, *count_writer;
+ unsigned long long tot_reads = 0, tot_writes = 0;
+ int i, a;
+ int use_affinity = 0;
- if (argc < 2) {
+ if (argc < 4) {
show_usage(argc, argv);
return -1;
}
- err = sscanf(argv[1], "%lu", &duration);
+ err = sscanf(argv[1], "%u", &nr_readers);
if (err != 1) {
show_usage(argc, argv);
return -1;
}
- for (i = 2; i < argc; i++) {
+ err = sscanf(argv[2], "%u", &nr_writers);
+ if (err != 1) {
+ show_usage(argc, argv);
+ return -1;
+ }
+
+ err = sscanf(argv[3], "%lu", &duration);
+ if (err != 1) {
+ show_usage(argc, argv);
+ return -1;
+ }
+
+ CPU_ZERO(&affinity);
+
+ for (i = 4; i < argc; i++) {
if (argv[i][0] != '-')
continue;
switch (argv[i][1]) {
yield_active |= YIELD_WRITE;
break;
#endif
- case 'n':
- no_writer_delay = 1;
+ case 'a':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+ a = atoi(argv[++i]);
+ CPU_SET(a, &affinity);
+ use_affinity = 1;
+ printf_verbose("Adding CPU %d affinity\n", a);
+ break;
+ case 'c':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+ rduration = atol(argv[++i]);
+ break;
+ case 'd':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+ wdelay = atol(argv[++i]);
+ break;
+ case 'v':
+ verbose_mode = 1;
break;
}
}
- printf("running test for %lu seconds.\n", duration);
- start_time = time(NULL);
- printf("thread %-6s, thread id : %lx, tid %lu\n",
+ printf_verbose("running test for %lu seconds, %u readers, %u writers.\n",
+ duration, nr_readers, nr_writers);
+ printf_verbose("Writer delay : %lu loops.\n", wdelay);
+ printf_verbose("Reader duration : %lu loops.\n", rduration);
+ printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
"main", pthread_self(), (unsigned long)gettid());
- for (i = 0; i < NR_READ; i++) {
- err = pthread_create(&tid_reader[i], NULL, thr_reader, NULL);
+ if (use_affinity
+ && sched_setaffinity(0, sizeof(affinity), &affinity) < 0) {
+ perror("sched_setaffinity");
+ exit(-1);
+ }
+
+ test_array = malloc(sizeof(*test_array) * ARRAY_SIZE);
+ tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
+ tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
+ count_reader = malloc(sizeof(*count_reader) * nr_readers);
+ count_writer = malloc(sizeof(*count_writer) * nr_writers);
+
+ for (i = 0; i < nr_readers; i++) {
+ err = pthread_create(&tid_reader[i], NULL, thr_reader,
+ &count_reader[i]);
if (err != 0)
exit(1);
}
- for (i = 0; i < NR_WRITE; i++) {
- err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL);
+ for (i = 0; i < nr_writers; i++) {
+ err = pthread_create(&tid_writer[i], NULL, thr_writer,
+ &count_writer[i]);
if (err != 0)
exit(1);
}
- for (i = 0; i < NR_READ; i++) {
+ smp_mb();
+
+ test_go = 1;
+
+ sleep(duration);
+
+ test_stop = 1;
+
+ for (i = 0; i < nr_readers; i++) {
err = pthread_join(tid_reader[i], &tret);
if (err != 0)
exit(1);
+ tot_reads += count_reader[i];
}
- for (i = 0; i < NR_WRITE; i++) {
+ for (i = 0; i < nr_writers; i++) {
err = pthread_join(tid_writer[i], &tret);
if (err != 0)
exit(1);
+ tot_writes += count_writer[i];
}
+
+ printf_verbose("total number of reads : %llu, writes %llu\n", tot_reads,
+ tot_writes);
+ printf("SUMMARY %-25s testdur %4lu nr_readers %3u rdur %6lu "
+ "nr_writers %3u "
+ "wdelay %6lu nr_reads %12llu nr_writes %12llu nr_ops %12llu\n",
+ argv[0], duration, nr_readers, rduration,
+ nr_writers, wdelay, tot_reads, tot_writes,
+ tot_reads + tot_writes);
test_array_free(test_rcu_pointer);
-
+ free(test_array);
+ free(tid_reader);
+ free(tid_writer);
+ free(count_reader);
+ free(count_writer);
return 0;
}
projects / urcu.git / blobdiff