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

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To: Len Brown <lenb@...>

Cc: <linux-pm@...>, Pavel Machek <pavel@...>, LKML <linux-kernel@...>, Adam Belay <abelay@...>, Andi Kleen <andi@...>, Lee Revell <rlrevell@...>

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

Date: Thursday, March 13, 2008 - 1:49 pm

On Thu, 13 Mar 2008 17:34:37 +0100
Pierre Ossman <drzeus-list@drzeus.cx> wrote:

quoted text> 
> It does not. But my C3 desc looks like this:
> 
> state3/desc:ACPI FFH INTEL MWAIT 0x50
> 
> What's the meaning of the last number?
> 

I've surfed Intel's web site for a bit, and found the MWAIT instruction in the arch docs. Unfortunately, it does not explain the value 0x50. According to the docs, that would be C6, which is not listed in the regular set of states for the Core 2. I did find this however:

http://www.trustedreviews.com/cpu-memory/review/2007/03/30/Intel-Processor-Roadmap-Pen...

It says that C6 is some ultra low power mode where more or less the entire chip is powered down.

Len, Venkatesh, do you have some insight? And is it harmless to move to more power hungry modes (i.e. C4 or 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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Messages in current thread:

[RFC][PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Fri Feb 29, 2:38 pm)

[PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Mon Mar 3, 4:18 pm)

Re: [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Mon Mar 3, 4:46 pm)

Re: [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Mon Mar 3, 5:03 pm)

Re: [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Mon Mar 3, 5:08 pm)

RE: [PATCH] cpuidle: avoid singing capacitors, Pallipadi, Venkatesh, (Mon Mar 3, 5:14 pm)

Re: [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Mon Mar 3, 5:17 pm)

RE: [PATCH] cpuidle: avoid singing capacitors, Pallipadi, Venkatesh, (Mon Mar 3, 6:04 pm)

Re: [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Mon Mar 3, 7:09 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Alan Stern, (Mon Mar 3, 7:05 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Mon Mar 3, 7:10 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Dave Jones, (Tue Mar 4, 12:00 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Tue Mar 4, 5:40 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 4, 2:14 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 4, 1:19 pm)

RE: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pallipadi, Venkatesh, (Tue Mar 4, 3:01 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 2:02 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 4:40 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Len Brown, (Wed Mar 12, 4:31 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Thu Mar 6, 4:27 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Sun Mar 9, 10:16 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 11, 3:51 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Tue Mar 11, 6:48 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Len Brown, (Wed Mar 12, 3:17 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 11, 11:20 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 11, 1:31 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Mon Mar 10, 6:00 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Mon Mar 10, 8:49 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Len Brown, (Wed Mar 12, 3:11 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Thu Mar 13, 12:34 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Fri Mar 14, 3:40 pm)

RE: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pallipadi, Venkatesh, (Fri Mar 14, 5:15 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Fri Mar 14, 8:41 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Thu Mar 13, 1:49 pm)

RE: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pallipadi, Venkatesh, (Thu Mar 13, 12:47 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Thu Mar 13, 1:44 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Thu Mar 13, 4:10 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Thu Mar 13, 6:42 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Len Brown, (Fri Mar 14, 12:13 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Mon Mar 10, 9:04 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Mon Mar 10, 9:29 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Henrique de Moraes Holschuh..., (Sun Mar 9, 3:30 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Sun Mar 9, 4:14 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Henrique de Moraes Holschuh..., (Sun Mar 9, 4:41 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Henrique de Moraes Holschuh..., (Sun Mar 9, 4:54 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Alan Stern, (Sun Mar 9, 2:50 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Rafael J. Wysocki, (Sun Mar 9, 2:19 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Wed Mar 5, 5:03 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 9:42 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pavel Machek, (Wed Mar 5, 9:47 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 9:52 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Tue Mar 4, 1:29 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 4, 1:30 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Tue Mar 4, 1:43 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Tue Mar 4, 2:04 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Tue Mar 4, 2:34 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 2:04 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Wed Mar 5, 11:48 am)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Wed Mar 5, 12:53 pm)

Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Wed Mar 5, 1:32 pm)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Andi Kleen, (Mon Mar 3, 8:36 am)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Lee Revell, (Sat Mar 1, 10:27 pm)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Sun Mar 2, 10:17 am)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Sat Mar 1, 9:40 am)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Lennart Sorensen, (Fri Feb 29, 5:44 pm)

Re: [RFC][PATCH] cpuidle: avoid singing capacitors, Pierre Ossman, (Sat Mar 1, 8:31 am)

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