Re: [PATCH] Trace idle entry and exit times

From: Andi Kleen
Date: Sat Dec 07 2013 - 12:29:43 EST

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> > Well that one is obvious. I mean more the subtle problems.
>
> Yeah, not subtle. SGI could use C2 as power supply stress tester.

This is only on system where the APIC timer does not tick in deep idle.
At this point these are 5+ year old systems.

There were some ideas of breaking up that lock, but they were never
fully implemented.

-Andi
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