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
next prev parent 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 High pitched noise from laptop: processor.c in linux 2.6 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
-- strict thread matches above, loose matches on Subject: below --
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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