From: Robert Love <rml@ximian.com>
To: jlnance@unity.ncsu.edu
Cc: linux-kernel@vger.kernel.org
Subject: Re: Laptops & CPU frequency
Date: Sat, 10 Jan 2004 22:17:41 -0500 [thread overview]
Message-ID: <1073791061.1663.77.camel@localhost> (raw)
In-Reply-To: <20040111025623.GA19890@ncsu.edu>
On Sat, 2004-01-10 at 21:56, jlnance@unity.ncsu.edu wrote:
> The frequency displayed in /proc/cpuinfo does not change if the AC
> adapter is toggled on or off after the machine has booted. It stays
> in the same mode as it was booted into. I am curious if this is because
> the CPU frequency really is not changing, or if it is because the
> number in /proc/cpuinfo is only calculated at boot.
The MHz value in /proc/cpuinfo should be updated as the CPU speed
changes - that is, it is not calculated just at boot, but it is updated
as the speed actually changes.
You probably have some issue in your power management scripts - Fedora
should scale the CPU speed back as soon as you remove AC power, not just
at boot if not on AC.
Robert Love
next prev parent reply other threads:[~2004-01-11 3:17 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-11 2:56 Laptops & CPU frequency jlnance
2004-01-11 3:17 ` Robert Love [this message]
2004-01-11 4:12 ` Valdis.Kletnieks
2004-01-11 6:16 ` Willy Tarreau
2004-01-11 10:27 ` Xavier Bestel
2004-01-11 10:33 ` Xavier Bestel
2004-01-12 16:58 ` Jerry Cooperstein
2004-01-12 21:19 ` Xavier Bestel
2004-01-12 19:52 ` john stultz
2004-01-12 20:11 ` Disconnect
2004-01-12 23:19 ` john stultz
2004-01-12 21:28 ` Xavier Bestel
2004-01-12 22:07 ` john stultz
2004-01-13 9:13 ` Xavier Bestel
2004-01-11 17:06 ` Matthew Garrett
2004-01-11 17:13 ` Robert Love
2004-01-11 17:44 ` Matthew Garrett
2004-01-11 17:54 ` Robert Love
2004-01-14 4:59 ` Dave Jones
2004-01-14 19:11 ` Daniel Gryniewicz
2004-01-14 19:17 ` Robert Love
2004-01-14 19:23 ` Daniel Gryniewicz
2004-01-15 20:42 ` Pavel Machek
2004-01-15 21:18 ` Daniel Gryniewicz
2004-01-15 22:21 ` John Bradford
2004-01-15 22:48 ` Pavel Machek
2004-01-19 17:44 ` Ducrot Bruno
2004-01-16 10:47 ` Pavel Machek
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