[Intel-gfx] [PATCH 4/4] cpuidle: Hack iowait weighting to avoid C-state reduction for graphics.
bug-track at fisher-privat.net
Tue Nov 2 13:00:31 PDT 2010
Am Dienstag, den 02.11.2010, 08:42 -0700 schrieb Eric Anholt:
> On Tue, 02 Nov 2010 20:20:14 +0800, ykzhao <yakui.zhao at intel.com> wrote:
> > On Tue, 2010-11-02 at 04:23 +0800, Eric Anholt wrote:
> > > Improves nexuiz performance by about 1% on my system.
> > CC: Arjan and linux-acpi mailing list.
> > It seems that the selection of C-state will become very sensitive to IO
> > wait after the multi factor is changed from 10 to 1000.
> > Maybe only one IO/wait will bring that the system can't enter the deep
> > C-state.
> Note the original message that said "This patch series is a hack, if it
> helps anyone I'll rewrite it to do the right thing".
If this patches about perforamnce issue on 9450gm and sleep state on
CPU, than it do not work for me.
I applied your patches on the top of 3e7b033 (drm/i915: Use the agp_size
determined from the GTT), the 3/4 was rejected so id it manually.
Same result: graphic perfomence drop on smp/ht system if cpu in C4.
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