tree 38d8b57c8c56a457a060866197d03d537653c2a3
parent 1fee955f9cc5903b3c7f79bbd90929aefad583a6
author Alberto Garcia <berto@igalia.com> 1433780264 +0200
committer Stefan Hajnoczi <stefanha@redhat.com> 1434114000 +0100

throttle: Add throttle group support

The throttle group support use a cooperative round robin scheduling
algorithm.

The principles of the algorithm are simple:
- Each BDS of the group is used as a token in a circular way.
- The active BDS computes if a wait must be done and arms the right
  timer.
- If a wait must be done the token timer will be armed so the token
  will become the next active BDS.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: f0082a86f3ac01c46170f7eafe2101a92e8fde39.1433779731.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>