Linux Symposium

July 13th-16th, 2010
Ottawa Westin
Ottawa, Canada

Register / Login / Submit Proposal

Presentations Keynotes Summits
Presentations
Tutorials
Lightning Talks
BOFS

Event Details Schedule
Venue
Travel & Hotel
Costs

FAQ

Media
Archives
Contact

Home



Monitoring scheduling in a Kerrighed cluster

Alexandre LISSY (alexandre.lissy@etu.univ-tours.fr)

Kerrighed is a Single System Image project on top of Linux kernel, thus allowing to create a big SMP or cluster on top of several mainstream computers. One component is the scheduler of the cluster. As users can use any node they want to start their process, the load should be unbalanced shortly. The Kerrighed scheduler decides how to balance this load accross the whole cluster (through migration of process for example). Thanks to this mechanism all nodes will be used at their full capacity instead of having one overloaded and the others idling. Prior to Kerrighed 2.4, the scheduler was hard coded. Kerrighed 2.4 introduced SchedConfig a framework allowing the user to create its own scheduler from userspace.

We implemented a scheduler, and needed to create new tools to grab data needed to decide wether this scheduler (in its current implementation) is efficient or not. Mainly, the idea is to track migrations that occurs inside the cluster and to log them. This allow to have a trace of the events, and thus to be able to measure some yet-to-be-defined quality measure of the scheduling. We will present how we currently handle migration tracking, and the tools we developped to present it in a viewable manner to the user.



Gold Sponsors
Silver Sponsors
Bronze Sponsors
Wireless Networking

register | call for papers

Copyright © 2010 Linux Symposium Inc. All rights reserved.
Linux is a registered trademark of Linus Torvalds.