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

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From: Pierre Ossman <drzeus-list@...>
To: Pallipadi, Venkatesh <venkatesh.pallipadi@...>
Cc: Dave Jones <davej@...>, Andi Kleen <andi@...>, Alan Stern <stern@...>, LKML <linux-kernel@...>, Adam Belay <abelay@...>, Lee Revell <rlrevell@...>, <linux-pm@...>, Pavel Machek <pavel@...>
Subject: Re: [linux-pm] [PATCH] cpuidle: avoid singing capacitors
Date: Tuesday, March 4, 2008 - 1:19 pm

On Tue, 4 Mar 2008 07:14:23 +0100
Pierre Ossman <drzeus-list@drzeus.cx> wrote:


Hold off on this. It turns out it still has major problems. The menu algorithm now and then gets really bad at predicting sleep times, completely killing this avoidance scheme.

(On that subject, does anyone except Adam understand that algorithm? Some comments wouldn't hurt...)

So for now, I'm back to thinking that measuring the interval between deep sleeps is the better approach. I could use some ideas for a good clock source though. I haven't dug much deeper than jiffies when it comes to kernel timekeeping.

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)