X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=tests%2Ftest_urcu_qsbr.c;h=d5d893c338aad555ff58bb988246338067f56aed;hb=bcc74df39fa57a21aa977ef14e02ed8ab13c37e2;hp=7f27038d2fbf8455f84aa25915698b818ed33088;hpb=95bc7fb90c36ee10dc171a23e8783eff30072b7b;p=urcu.git

diff --git a/tests/test_urcu_qsbr.c b/tests/test_urcu_qsbr.c
index 7f27038..d5d893c 100644
--- a/tests/test_urcu_qsbr.c
+++ b/tests/test_urcu_qsbr.c
@@ -62,19 +62,15 @@ static inline pid_t gettid(void)
 #ifndef DYNAMIC_LINK_TEST
 #define _LGPL_SOURCE
 #else
-#define debug_yield_read()
+#define rcu_debug_yield_read()
 #endif
 #include "urcu-qsbr.h"
 
-struct test_array {
-	int a;
-};
-
 static volatile int test_go, test_stop;
 
 static unsigned long wdelay;
 
-static struct test_array *test_rcu_pointer;
+static int *test_rcu_pointer;
 
 static unsigned long duration;
 
@@ -184,46 +180,14 @@ void rcu_copy_mutex_unlock(void)
 	}
 }
 
-/*
- * 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_writers, and we keep the mutex across
- * both alloc and free, which insures we never run over our tail.
- */
-#define ARRAY_SIZE (1048576 * nr_writers)
-#define ARRAY_POISON 0xDEADBEEF
-static int array_index;
-static struct test_array *test_array;
-
-static struct test_array *test_array_alloc(void)
-{
-	struct test_array *ret;
-	int index;
-
-	index = array_index % ARRAY_SIZE;
-	assert(test_array[index].a == ARRAY_POISON ||
-		test_array[index].a == 0);
-	ret = &test_array[index];
-	array_index++;
-	if (array_index == ARRAY_SIZE)
-		array_index = 0;
-	return ret;
-}
-
-static void test_array_free(struct test_array *ptr)
-{
-	if (!ptr)
-		return;
-	ptr->a = ARRAY_POISON;
-}
-
 void *thr_reader(void *_count)
 {
 	unsigned long long *count = _count;
-	struct test_array *local_ptr;
+	int *local_ptr;
 
 	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
-			"reader", pthread_self(), (unsigned long)gettid());
+			"reader", (unsigned long) pthread_self(),
+			(unsigned long) gettid());
 
 	set_affinity();
 
@@ -237,9 +201,9 @@ void *thr_reader(void *_count)
 	for (;;) {
 		rcu_read_lock();
 		local_ptr = rcu_dereference(test_rcu_pointer);
-		debug_yield_read();
+		rcu_debug_yield_read();
 		if (local_ptr)
-			assert(local_ptr->a == 8);
+			assert(*local_ptr == 8);
 		if (caa_unlikely(rduration))
 			loop_sleep(rduration);
 		rcu_read_unlock();
@@ -259,7 +223,8 @@ void *thr_reader(void *_count)
 
 	*count = URCU_TLS(nr_reads);
 	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
-			"reader", pthread_self(), (unsigned long)gettid());
+			"reader", (unsigned long) pthread_self(),
+			(unsigned long) gettid());
 	return ((void*)1);
 
 }
@@ -267,10 +232,11 @@ void *thr_reader(void *_count)
 void *thr_writer(void *_count)
 {
 	unsigned long long *count = _count;
-	struct test_array *new, *old;
+	int *new, *old;
 
 	printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
-			"writer", pthread_self(), (unsigned long)gettid());
+			"writer", (unsigned long) pthread_self(),
+			(unsigned long) gettid());
 
 	set_affinity();
 
@@ -280,18 +246,16 @@ void *thr_writer(void *_count)
 	cmm_smp_mb();
 
 	for (;;) {
-		rcu_copy_mutex_lock();
-		new = test_array_alloc();
-		new->a = 8;
+		new = malloc(sizeof(int));
+		assert(new);
+		*new = 8;
 		old = rcu_xchg_pointer(&test_rcu_pointer, new);
 		if (caa_unlikely(wduration))
 			loop_sleep(wduration);
 		synchronize_rcu();
-		/* can be done after unlock */
 		if (old)
-			old->a = 0;
-		test_array_free(old);
-		rcu_copy_mutex_unlock();
+			*old = 0;
+		free(old);
 		URCU_TLS(nr_writes)++;
 		if (caa_unlikely(!test_duration_write()))
 			break;
@@ -300,7 +264,8 @@ void *thr_writer(void *_count)
 	}
 
 	printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
-			"writer", pthread_self(), (unsigned long)gettid());
+			"writer", (unsigned long) pthread_self(),
+			(unsigned long) gettid());
 	*count = URCU_TLS(nr_writes);
 	return ((void*)2);
 }
@@ -357,10 +322,10 @@ int main(int argc, char **argv)
 		switch (argv[i][1]) {
 #ifdef DEBUG_YIELD
 		case 'r':
-			yield_active |= YIELD_READ;
+			rcu_yield_active |= RCU_RCU_YIELD_READ;
 			break;
 		case 'w':
-			yield_active |= YIELD_WRITE;
+			rcu_yield_active |= RCU_RCU_YIELD_WRITE;
 			break;
 #endif
 		case 'a':
@@ -405,9 +370,9 @@ int main(int argc, char **argv)
 	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());
+			"main", (unsigned long) pthread_self(),
+			(unsigned long) gettid());
 
-	test_array = calloc(1, 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);
@@ -457,8 +422,7 @@ int main(int argc, char **argv)
 		argv[0], duration, nr_readers, rduration, wduration,
 		nr_writers, wdelay, tot_reads, tot_writes,
 		tot_reads + tot_writes);
-	test_array_free(test_rcu_pointer);
-	free(test_array);
+	free(test_rcu_pointer);
 	free(tid_reader);
 	free(tid_writer);
 	free(count_reader);