* Linus Torvalds <[EMAIL PROTECTED]> wrote:
> On Mon, 17 Nov 2008, David Miller wrote:
> >
> > The scheduler has accounted for at least %10 of the tbench
> > regressions at this point, what are you talking about?
>
> I'm wondering if you're not looking at totally different issues.
>
> For example, if I recall correctly, David had a big hit on the
> hrtimers. And I wonder if perhaps Ingo's numbers are without
> hrtimers or something?
hrtimers should not be an issue anymore since this commit:
| commit 0c4b83da58ec2e96ce9c44c211d6eac5f9dae478
| Author: Ingo Molnar <[EMAIL PROTECTED]>
| Date: Mon Oct 20 14:27:43 2008 +0200
|
| sched: disable the hrtick for now
|
| David Miller reported that hrtick update overhead has tripled the
| wakeup overhead on Sparc64.
|
| That is too much - disable the HRTICK feature for now by default,
| until a faster implementation is found.
|
| Reported-by: David Miller <[EMAIL PROTECTED]>
| Acked-by: Peter Zijlstra <[EMAIL PROTECTED]>
| Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
Which was included in v2.6.28-rc1 already.
Ingo
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