+/*
+ * test_urcu.c
+ *
+ * Userspace RCU library - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * Distributed under GPLv2
+ */
+
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
+#include <sys/syscall.h>
+
+#if defined(_syscall0)
+_syscall0(pid_t, gettid)
+#elif defined(__NR_gettid)
+static inline pid_t gettid(void)
+{
+ return syscall(__NR_gettid);
+}
+#else
+#warning "use pid as tid"
+static inline pid_t gettid(void)
+{
+ return getpid();
+}
+#endif
+
#include "urcu.h"
struct test_array {
int a;
- int b;
- char c[200];
};
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
+
+/*
+ * returns 0 if test should end.
+ */
+static int test_duration(void)
+{
+ if (duration_interval++ >= DURATION_TEST_DELAY) {
+ duration_interval = 0;
+ if (time(NULL) - start_time >= duration)
+ return 0;
+ }
+ return 1;
+}
+
#define NR_READ 10
-#define NR_WRITE 5
+#define NR_WRITE 9
+
+pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+void rcu_copy_mutex_lock(void)
+{
+ int ret;
+ ret = pthread_mutex_lock(&rcu_copy_mutex);
+ if (ret) {
+ perror("Error in pthread mutex lock");
+ exit(-1);
+ }
+}
+
+void rcu_copy_mutex_unlock(void)
+{
+ int ret;
+ ret = pthread_mutex_unlock(&rcu_copy_mutex);
+ if (ret) {
+ perror("Error in pthread mutex unlock");
+ exit(-1);
+ }
+}
void *thr_reader(void *arg)
{
- int qparity, i;
struct test_array *local_ptr;
- printf("thread %s, thread id : %lu, pid %lu\n",
- "reader", pthread_self(), getpid());
- sleep(2);
+ printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ "reader", pthread_self(), (unsigned long)gettid());
urcu_register_thread();
- for (i = 0; i < 1000000; i++) {
- qparity = rcu_read_lock();
+ for (;;) {
+ rcu_read_lock();
local_ptr = rcu_dereference(test_rcu_pointer);
- if (local_ptr) {
+ if (local_ptr)
assert(local_ptr->a == 8);
- assert(local_ptr->b == 12);
- assert(local_ptr->c[55] == 2);
- }
- rcu_read_unlock(qparity);
+ rcu_read_unlock();
+ if (!test_duration())
+ break;
}
urcu_unregister_thread();
+ printf("thread_end %s, thread id : %lx, tid %lu\n",
+ "reader", pthread_self(), (unsigned long)gettid());
return ((void*)1);
}
void *thr_writer(void *arg)
{
- int i;
struct test_array *new, *old;
- printf("thread %s, thread id : %lu, pid %lu\n",
- "writer", pthread_self(), getpid());
- sleep(2);
+ printf("thread_begin %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
- for (i = 0; i < 1000000; i++) {
- rcu_write_lock();
+ for (;;) {
new = malloc(sizeof(struct test_array));
+ rcu_copy_mutex_lock();
old = test_rcu_pointer;
- if (old) {
+ if (old)
assert(old->a == 8);
- assert(old->b == 12);
- assert(old->c[55] == 2);
- }
- assert(new->a = 8);
- assert(new->b = 12);
- assert(new->c[55] = 2);
- old = urcu_publish_content(&test_rcu_pointer, new);
- rcu_write_unlock();
+ new->a = 8;
+ old = urcu_publish_content((void **)&test_rcu_pointer, new);
+ rcu_copy_mutex_unlock();
/* can be done after unlock */
+ if (old)
+ old->a = 0;
free(old);
+ if (!test_duration())
+ break;
+ usleep(1);
}
+ printf("thread_end %s, thread id : %lx, tid %lu\n",
+ "writer", pthread_self(), (unsigned long)gettid());
return ((void*)2);
}
-int main()
+void show_usage(int argc, char **argv)
+{
+ printf("Usage : %s duration (s)", argv[0]);
+#ifdef DEBUG_YIELD
+ printf(" [-r] [-w] (yield reader and/or writer)");
+#endif
+ printf("\n");
+}
+
+int main(int argc, char **argv)
{
int err;
pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE];
void *tret;
int i;
+ if (argc < 2) {
+ show_usage(argc, argv);
+ return -1;
+ }
+
+ err = sscanf(argv[1], "%lu", &duration);
+ if (err != 1) {
+ show_usage(argc, argv);
+ return -1;
+ }
+
+#ifdef DEBUG_YIELD
+ for (i = 2; i < argc; i++) {
+ if (argv[i][0] != '-')
+ continue;
+ switch (argv[i][1]) {
+ case 'r':
+ yield_active |= YIELD_READ;
+ break;
+ case 'w':
+ yield_active |= YIELD_WRITE;
+ break;
+ }
+ }
+#endif
+
+ printf("running test for %lu seconds.\n", duration);
+ start_time = time(NULL);
+ printf("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 (err != 0)
exit(1);
}
- sleep(10);
-
- for (i = 0; i < NR_WRITE; i++) {
+ for (i = 0; i < NR_READ; i++) {
err = pthread_join(tid_reader[i], &tret);
if (err != 0)
exit(1);
if (err != 0)
exit(1);
}
+ free(test_rcu_pointer);
return 0;
}
projects / urcu.git / blobdiff