X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=test_qsbr.c;h=35294430eb8665b0f607cbab90f3f3681fcfb4bb;hb=900e541e6604a92bdf268074bb41ec6b6632d4eb;hp=f56234b564c8bac4a6d01ff1b2eede53beba3e0f;hpb=9e97e4783f9b20f5d261d12acb4980b1908aa5cd;p=urcu.git

diff --git a/test_qsbr.c b/test_qsbr.c
index f56234b..3529443 100644
--- a/test_qsbr.c
+++ b/test_qsbr.c
@@ -65,6 +65,15 @@ static struct test_array *test_rcu_pointer;
 
 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.
  */
@@ -164,6 +173,8 @@ void *thr_reader(void *_count)
 		debug_yield_read();
 		if (local_ptr)
 			assert(local_ptr->a == 8);
+		if (unlikely(rduration))
+			loop_sleep(rduration);
 		_rcu_read_unlock();
 		nr_reads++;
 		/* QS each 1024 reads */
@@ -228,6 +239,7 @@ 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");
 }
@@ -291,6 +303,13 @@ 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);
@@ -304,6 +323,7 @@ int main(int argc, char **argv)
 	printf("running test for %lu seconds, %u readers, %u writers.\n",
 		duration, nr_readers, nr_writers);
 	printf("Writer delay : %u us.\n", wdelay);
+	printf("Reader duration : %lu loops.\n", rduration);
 	printf("thread %-6s, thread id : %lx, tid %lu\n",
 			"main", pthread_self(), (unsigned long)gettid());