From 098bede0ec75fb809cc5715379f995fcb1a5b7d6 Mon Sep 17 00:00:00 2001
From: Bob Lantz <rlantz@cs.stanford.edu>
Date: Thu, 2 Oct 2014 20:09:17 -0700
Subject: [PATCH] Wait for controller shutdown.

Unfortunately, this can slow things down a bit - perhaps
100-200 ms in the case of ovs-controller, but I am hoping that
it may help slightly with #399.
---
 mininet/node.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mininet/node.py b/mininet/node.py
index c9d36ef..c82d293 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -1293,6 +1293,7 @@ class Controller( Node ):
     def stop( self ):
         "Stop controller."
         self.cmd( 'kill %' + self.command )
+        self.cmd( 'wait %' + self.command )
         self.terminate()
 
     def IP( self, intf=None ):