Messages in this thread | | | Subject | Re: Scheduler behaviour | From | Peter Zijlstra <> | Date | Wed, 05 Dec 2007 22:15:02 +0100 |
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On Wed, 2007-12-05 at 21:15 +0100, Holger Wolf wrote:
> We discovered performance degradation with dbench when using kernel 2.6.23 compared to kernel 2.6.22.
We've fixed a lot of regressions and made a lot of other changes to the scheduler since .23. Could you please try the backport of the latest scheduler on top of .23 to see if any of our recent work solved your problem? (using a backport against .23 or even .22 allows you to test just the scheduler changes in isolation)
http://people.redhat.com/mingo/cfs-scheduler/sched-cfs-v2.6.22.13-v24.patch http://people.redhat.com/mingo/cfs-scheduler/sched-cfs-v2.6.23.9-v24.patch
Also, it could be dbench is one of those benchmarks that favours unfairness, I seem to remember so.. still we should not regress too much without a very good reason.
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