Messages in this thread | | | Date | Sat, 1 Dec 2007 02:17:40 -0800 | From | Andrew Morton <> | Subject | Re: + restore-missing-sysfs-max_cstate-attr.patch added to -mm tree |
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On Fri, 30 Nov 2007 22:14:08 -0500 Mark Lord <lkml@rtr.ca> wrote:
> > latency. If your app cant take any latency, you should set those... and > > the side effect is that the kernel will not do long-latency C-states or > > P-state transitions.. > .. > > I don't mind the cpufreq changing (actually, I want it to drop in cpugfreq > to save power and keep the fan off), but the C-states just kill this app.
semi-OT: I was finding that disabling cpufreq altogether on the Vaio speeds up `quilt push 1000' by a lot - around 30% iirc.
There do seem to be some unsophisticated decisions in there and we're losing quite a bit of performance as a result.
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