Messages in this thread | | | Date | Thu, 22 Feb 2007 17:27:52 +0100 | From | Pierre Ossman <> | Subject | Re: NO_HZ: timer interrupt stuck [Re: Linux 2.6.21-rc1] |
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Thomas Gleixner wrote: > > Here is the reason. The local APIC stops working in C3 state and we fall > back to the PIT in that case. Not really exciting for dynticks, but the > only way to keep the system alive. There is a patch coming up from > Intel, which finds out how to use HPET even if it is not enabled by the > BIOS. This will still end up on IRQ#0, but will give way longer idle > sleeps than the PIT. > >
So then the next two questions are; is it possible to disable C3 and is it a net power gain to get rid of the wakeups in favor of having C3.
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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