72575889c8
This patch adds the ability to measure network downtime during live migration process. A fixture has been added to start and stop a background pinger process and also read status from it. The downtime measurement has 0.2 seconds granularity. In order to reduce overall traffic the ping payload size set to minimal value. Change-Id: I83c6a5d49f5d4da05deb677907e5048ecdd2242b