Re: [PATCH] cpufreq: Change link order of x86 cpufreq modules

[Dave Jones]

On Fri, Feb 20, 2009 at 05:39:35PM +0000, Scott James Remnant wrote:
 > On Fri, 2009-02-20 at 17:36 +0000, Matthew Garrett wrote:
 > 
 > > On Fri, Feb 20, 2009 at 05:29:52PM +0000, Scott James Remnant wrote:
 > > 
 > > > In fact, we've noticed severe regressions with p4-clockmod over simply
 > > > having no scaling driver at all - and are not going to built it into our
 > > > kernels.
 > > 
 > > It makes sense to have p4-clockmod from a thermal management 
 > > perspective. We should probably bump its transition latency to more than 
 > > 10ms to prevent ondemand binding to it.
 > > 
 > If that's possible; that'd be good.
 > 
 > The trouble with it is that it never seems to bring the CPU anywhere
 > near maximum performance.

This is one reason why in .30 the user interface for p4-clockmod is disabled.
It'll only get throttled when ACPI goes into OMG I'M OVERHEATING mode,
and ramp back up once it cools off.

p4-clockmod and ondemand is a recipe for fail.

	Dave

-- 
http://www.codemonkey.org.uk
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