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From: Lee Revell <rlrevell@joe-job.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Pavel Machek <pavel@ucw.cz>, M <mru@mru.ath.cx>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: High pitched noise from laptop: processor.c in linux 2.6
Date: Sat, 16 Oct 2004 21:24:43 -0400	[thread overview]
Message-ID: <1097976283.2148.34.camel@krustophenia.net> (raw)
In-Reply-To: <1097963167.13226.4.camel@localhost.localdomain>

On Sat, 2004-10-16 at 17:46, Alan Cox wrote:
> On Sad, 2004-10-16 at 20:52, Lee Revell wrote:
> > > What benefits? HZ=1000 takes 1W more on my system.
> > Better timer resolution?
> 
> And heavily reduced accuracy on a lot of laptops where 1000Hz
> is enough to make the clock slide every time the battery state is
> queried or an SMM event triggers.
> 

Wouldn't such a laptop be horribly broken?  1ms is a LONG time to
disable interrupts.  That's millions of CPU cycles...

> Getting the best of both worlds depends on the stuff discussed at OLS
> being finished, then you can have 1Khz accurancy and battery life
> 

I was not there but I imagine this involves a way to get 1khz accuracy
with a 100Hz timer interrupt rate?

Lee


  reply	other threads:[~2004-10-17  1:32 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-07  9:30 Fraz
2004-10-07 10:32 ` Pavel Machek
2004-10-07 10:53   ` Måns Rullgård
2004-10-07 14:32     ` Pavel Machek
2004-10-16 19:52       ` Lee Revell
2004-10-16 21:46         ` Alan Cox
2004-10-17  1:24           ` Lee Revell [this message]
2004-10-17  1:50             ` Kyle Moffett
2004-10-17  2:21             ` Alan Cox
2004-10-17  3:33               ` Lee Revell
2004-10-22 11:40               ` Alexandre Oliva
2004-10-16 19:59       ` Måns Rullgård
2004-10-16 20:42         ` Pavel Machek
2004-10-07 14:34     ` Pavel Machek
2004-10-17  0:45   ` Alex Riesen
2004-10-07 10:37 ` Christian Hesse
2004-10-17  5:21 Albert Cahalan
2004-10-18  3:51 Yu, Luming
2004-10-18 11:41 ` Pavel Machek
2004-10-20 14:47   ` Måns Rullgård
2004-10-20 15:47     ` Pavel Machek
2004-10-20 16:37       ` Måns Rullgård
2004-10-20 16:49         ` Jan-Benedict Glaw
2004-10-20 16:53           ` Pavel Machek
2004-10-20 16:53         ` Lee Revell
2004-10-20 17:13           ` Måns Rullgård
2004-10-21 20:32             ` Lee Revell
2004-10-21 21:39               ` Jon Masters
2004-10-20 23:31   ` Giuseppe Bilotta

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