X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=test_mutex.c;h=6fd1746a1c03e35132cbdd34558befb97a5814a0;hp=29c840b284a3a8277edf4786d22d7c4ea4b584b7;hb=daddf5b0bf1ec7aeaa56c278cf4c1dd1094c174a;hpb=8b632babd61dd1708c4cf95f1f417469f8f6a528

diff --git a/test_mutex.c b/test_mutex.c
index 29c840b..6fd1746 100644
--- a/test_mutex.c
+++ b/test_mutex.c
@@ -71,9 +71,15 @@ static volatile struct test_array test_array = { 8 };
 
 static unsigned long duration;
 
-/* read-side C.S. duration, in us */
+/* read-side C.S. duration, in loops */
 static unsigned long rduration;
 
+static inline void loop_sleep(unsigned long l)
+{
+	while(l-- != 0)
+		cpu_relax();
+}
+
 /*
  * returns 0 if test should end.
  */
@@ -134,7 +140,7 @@ void *thr_reader(void *data)
 		pthread_mutex_lock(&lock);
 		assert(test_array.a == 8);
 		if (unlikely(rduration))
-			usleep(rduration);
+			loop_sleep(rduration);
 		pthread_mutex_unlock(&lock);
 		nr_reads++;
 		if (unlikely(!test_duration_read()))
@@ -185,7 +191,7 @@ void show_usage(int argc, char **argv)
 	printf(" [-r] [-w] (yield reader and/or writer)");
 #endif
 	printf(" [-d delay] (writer period (us))");
-	printf(" [-c duration] (reader C.S. duration (us))");
+	printf(" [-c duration] (reader C.S. duration (in loops))");
 	printf(" [-a cpu#] [-a cpu#]... (affinity)");
 	printf("\n");
 }