Re: dynamic sched timeslices

From: Con Kolivas (kernel_at_kolivas.org)
Date: 03/18/04

  • Next message: Andrew Morton: "Re: add lowpower_idle sysctl" 
    Date:	Thu, 18 Mar 2004 14:38:21 +1100
To: Andrew Morton <akpm@osdl.org>

    Quoting Andrew Morton <akpm@osdl.org>:

    > Kurt Garloff <garloff@suse.de> wrote:
    > >
    > > Hi Con,
    > >
    > > On Wed, Mar 17, 2004 at 07:45:02AM +1100, Con Kolivas wrote:
    > > > > That's why I think we should offer the tunables.
    > > >
    > > > If your workload is so dedicated to just number crunching it isn't hard
    > to add
    > > > a zero to maximum timeslice in kernel/sced.c.
    > >
    > > Of course I can compile a custom kernel for myself and tune all sorts of
    > > things. But this is not the way most Linux users want to use Linux any
    > > more. Actually that's a long time ago.
    > >
    >
    > I don't think we should be averse to offering a couple of nice high-level
    > scheduler tunables. But I do think we should have testing results which
    > clearly show that they provide some benefit, and we should agree that the
    > scheduler cannot provide the same benefit automagically.
    >
    > Apologies in advance if we've seen those testing results and I missed it.

    Well that reply takes my message out of context. I'm not averse to tunables - if
    they do something.

    The only evidence Kurt has shown so far is that he can decrease throughput. The
    rest is theoretical based on a scheduler that isn't the 2.6 kernel.

    Con

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