Delay reader in loops, not us

[urcu.git] / test_mutex.c

diff --git a/test_mutex.c b/test_mutex.c
index 29c840b284a3a8277edf4786d22d7c4ea4b584b7..6fd1746a1c03e35132cbdd34558befb97a5814a0 100644 (file)
--- 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");
 }