Re: Scheduler ( was: Just a second ) ...

[John Heil]

On Mon, 17 Dec 2001, Thierry Forveille wrote:

> Date: Mon, 17 Dec 2001 19:11:10 -1000 (HST)
> From: Thierry Forveille <[e-mail]>
> To: [e-mail]
> Subject: Re: Scheduler ( was: Just a second ) ...
> 
> Linus Torvalds ([e-mail]) writes
> > On Mon, 17 Dec 2001, Rik van Riel wrote:
> > >
> > > Try readprofile some day, chances are schedule() is pretty
> > > near the top of the list.
> >
> > Ehh.. Of course I do readprofile.
> >  
> > But did you ever compare readprofile output to _total_ cycles spent?
> >
> I have a feeling that this discussion got sidetracked: cpu cycles burnt 
> in the scheduler indeed is non-issue, but big tasks being needlessly moved
> around on SMPs is worth tackling.

Given a cpu affinity facility, policy mgmt would belong in user space.
CPU affinity would be pretty simple and I think the effort is already
in flight IIRC.

Johnh

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John Heil
South Coast Software
Custom systems software for UNIX and IBM MVS mainframes
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