X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=test_rwlock.c;h=a6f31e31f1e7328de9a0dc2303c5591b2f2b41db;hb=daddf5b0bf1ec7aeaa56c278cf4c1dd1094c174a;hp=0fdaad60b9871641d30b7e1eca3007f3ff07ad06;hpb=9e97e4783f9b20f5d261d12acb4980b1908aa5cd;p=urcu.git

diff --git a/test_rwlock.c b/test_rwlock.c
index 0fdaad6..a6f31e3 100644
--- a/test_rwlock.c
+++ b/test_rwlock.c
@@ -71,6 +71,15 @@ static volatile struct test_array test_array = { 8 };
 
 static unsigned long duration;
 
+/* 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.
  */
@@ -127,6 +136,8 @@ void *thr_reader(void *_count)
 	for (;;) {
 		pthread_rwlock_rdlock(&lock);
 		assert(test_array.a == 8);
+		if (unlikely(rduration))
+			loop_sleep(rduration);
 		pthread_rwlock_unlock(&lock);
 		nr_reads++;
 		if (unlikely(!test_duration_read()))
@@ -177,6 +188,7 @@ 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 (in loops))");
 	printf(" [-a cpu#] [-a cpu#]... (affinity)");
 	printf("\n");
 }
@@ -241,6 +253,13 @@ int main(int argc, char **argv)
 			use_affinity = 1;
 			printf("Adding CPU %d affinity\n", a);
 			break;
+		case 'c':
+			if (argc < i + 2) {
+				show_usage(argc, argv);
+				return -1;
+			}
+			rduration = atoi(argv[++i]);
+			break;
 		case 'd':
 			if (argc < i + 2) {
 				show_usage(argc, argv);