Messages in this thread | | | Date | Sun, 31 Jul 2005 08:29:27 +0200 | From | Ingo Molnar <> | Subject | Re: [sched, patch] better wake-balancing, #2 |
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* Chuck Ebbert <76306.1226@compuserve.com> wrote:
> On Fri, 29 Jul 2005 at 17:02:07 +0200, Ingo Molnar wrote: > > > do wakeup-balancing only if the wakeup-CPU is idle. > > > > this prevents excessive wakeup-balancing while the system is highly > > loaded, but helps spread out the workload on partly idle systems. > > I tested this with Volanomark on dual-processor PII Xeon -- the > results were very bad:
which patch have you tested? The mail you replied to above is for patch #2, while on SMT/HT boxes it's patch #3 that is the correct approach.
furthermore, which base kernel have you applied the patch to? Best would be to test the following kernels:
2.6.13-rc4 + sched-rollup 2.6.13-rc4 + sched-rollup + better-wake-balance-#3
the sched-rollup and the latest better-wake-balance patches can be found at:
http://redhat.com/~mingo/scheduler-patches/
(sched-rollup is the current scheduler patch-queue in -mm. And if you have time, it would also be nice to have a 2.6.13-rc4 baseline for VolanoMark, and perhaps a 2.6.12 measurement too, so that we can see how things changed.)
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