Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors

On Tue, 11 Mar 2008 11:48:22 +0100
Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:

I have now found a very hacky workaround that is slightly better than
disabling C3 altogether; making C3 exclusive to one core at a time. It
seems to kill the noise and the system now spends 50% in C3, instead of
0%.

I suspect it won't do much of C3 if only one core is idle this way.
Most likely you just disabled C3 this way in a way invisible to software.


What a letdown... I'll pull out the old watt meter again and see if I can confirm that.

Rgds
--
-- Pierre Ossman

Linux kernel, MMC maintainer http://www.kernel.org
PulseAudio, core developer http://pulseaudio.org
rdesktop, core developer http://www.rdesktop.org
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