From: "H. Peter Anvin" <hpa@zytor.com>
To: Dave Jones <davej@redhat.com>,
Stephen Clark <Stephen.Clark@seclark.us>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Power Saving
Date: Mon, 19 Nov 2007 17:21:36 -0800 [thread overview]
Message-ID: <474236A0.8030601@zytor.com> (raw)
In-Reply-To: <20071120011236.GA17420@redhat.com>
Dave Jones wrote:
> >
> > and:
> > cat /proc/acpi/processor/CPU0/throttling
> > state count: 2
> > active state: T0
> > states:
> > *T0: 00%
> > T1: 50%
>
> See above. These are throttling states, used typically
> if the system is overheating.
>
And more importantly, there is no power advantages over T states as
opposed to C states. They pretty much mean pulsing the system in and
out of either C1 or C2 depending on the CPU/chipset.
-hpa
next prev parent reply other threads:[~2007-11-20 1:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-20 0:41 Power Saving Stephen Clark
2007-11-20 0:54 ` Dave Jones
2007-11-20 1:05 ` Stephen Clark
2007-11-20 1:12 ` Dave Jones
2007-11-20 1:21 ` H. Peter Anvin [this message]
2007-11-27 22:31 ` Phillip Susi
-- strict thread matches above, loose matches on Subject: below --
2003-08-25 16:35 power saving mjstumpf
2003-08-25 16:52 ` Peter L. Ashford
2003-08-25 17:19 ` Mike Dresser
2003-09-02 17:25 ` Gordon Henderson
2001-05-07 5:54 Tania Oka
2001-05-07 19:49 ` Dan Malek
2001-05-10 10:36 ` August Hoerandl
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