Re: [PATCH] Nick's scheduler policy v10

[Con Kolivas]

On Wed, 3 Sep 2003 09:50, Nick Piggin wrote:
> Martin J. Bligh wrote:
> >>>Not convinced of that - mm performs worse than mainline for me.
> >>
> >>Well, one of Con's patches caused a lot of idle time on volanomark.
> >>The reason for the change was unclear. I guess either a fairness or
> >>wakeup latency change (yes, it was a very scientific process, ahem).
> >>
> >>Anyway, in the process of looking at the load balancing, we found
> >>and fixed a problem (although it might now possibly over balance).
> >>This did cure most of the idle problems.
> >>
> >>So it could just be small changes causing things to go out of whack.
> >>I will try to get better data after (if ever) the thing is working
> >>nicely on the desktop.
> >
> >I think Con and I worked out that the degredations I was seeing
> >(on kernbench and SDET) were due to (in his words) "my hacks throwing the
> >cc cpu hogs onto the expired array more frequently".
>
> This didn't explain the huge idle time increases on volanomark and
> SPECjbb I think.

Yeah this was before the profile showed it to be idle time, and before I 
isolated it to Ingo's A3 patch.

Con

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