tests: Await for graph switch before testing open fop count

In performance/open-behind.t, a test for open fop reaching the brick is done by
switching off open-behind and performing a read operation. If the read operation
is performed before a graph switch, the read happens on the old graph and hence
open does not get accounted in the brick.

To overcome this EXPECT_WITHIN 10 seconds has now been added to ensure that a
graph switch has happened. The read operation happens subsequently after the
graph switch.

Cleaned up a "No volumes present" message from stderr while doing this.

Change-Id: I1e1c0d7e4bd2057520b4dd46157d18f30837b8c9
BUG: 1213066
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/10293
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
Tested-by: Raghavendra Bhat <raghavendra@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/performance/open-behind.t b/tests/performance/open-behind.t
index 5a24c83954d..e7a2bcf788b 100755
--- a/tests/performance/open-behind.t
+++ b/tests/performance/open-behind.t
@@ -1,12 +1,13 @@
 #!/bin/bash
 
 . $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
 
 cleanup;
 
 TEST glusterd
 TEST pidof glusterd
-TEST $CLI volume info;
+TEST $CLI volume info 2>/dev/null;
 
 TEST $CLI volume create $V0 $H0:$B0/${V0}{1,2};
 
@@ -49,6 +50,8 @@ EXPECT "" echo $string;
 
 TEST $CLI volume set $V0 performance.open-behind off;
 
+EXPECT_WITHIN $GRAPH_SWITCH_TIMEOUT "2" num_graphs $M0;
+
 D1="hello-this-is-a-test-message1";
 F1="test-file1";