Messages in this thread | | | Date | Tue, 23 Dec 2008 17:56:00 +0000 | From | Matthew Garrett <> | Subject | Re: Perfomance governor is still changing frequency |
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On Mon, Dec 15, 2008 at 12:59:15PM -0500, Len Brown wrote:
> and that will tell us if turbo is related to your > occasional obervance of low-frequency-mode.
We've observed this on certain other pieces of modern Intel hardware - the best hypothesis we've been able to come up with is that if the msr read is the first instruction run on the core when it's previously been in a deep C state, the low-clock speed is reported. However, some Thinkpads will also automatically limit their speed for thermal reasons.
-- Matthew Garrett | mjg59@srcf.ucam.org
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