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

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From: Andi Kleen <andi@...>
To: Pierre Ossman <drzeus-list@...>
Cc: Pallipadi, Venkatesh <venkatesh.pallipadi@...>, 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 - 1:29 pm

> 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.

jiffies should work, you just need to make sure you measure them at the
right place. In particular there is some code in dyntick that catches
up on jiffies after the deep sleep when the normal timer handler didn't run
and jiffies are only usable again after that code executed.

-ANdi
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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)