linux-kernel - Re: cpufreq doesn't seem to work in Intel Q9300

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080811071209.189b68c5@infradead.org>
Date:	Mon, 11 Aug 2008 07:12:09 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Adrian Bunk <bunk@...nel.org>, S K <nospamnoham@...il.com>,
	Zhao Yakui <yakui.zhao@...el.com>,
	Thomas Renninger <trenn@...e.de>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: cpufreq doesn't seem to work in Intel Q9300

On Mon, 11 Aug 2008 15:07:34 +0100
Matthew Garrett <mjg59@...f.ucam.org> wrote:

> On Mon, Aug 11, 2008 at 05:02:06PM +0300, Adrian Bunk wrote:
> 
> > This statement is only true for HPC environments and when you
> > measure Watts per work done.
> > 
> > But if you have some desktop or server with a load that is
> > determined by when it gets used, then p4-clockmod can actually save
> > energy when the computer is not under high load or even idle.
> > 
> > Or do I miss anything?
> 
> On modern hardware, the C states will win you more than downclocking
> the processor would.
> 

actually.. p4_clockmod is *NOT* downclocking the processor.. that's the
whole problem with it..



-- 
If you want to reach me at my work email, use arjan@...ux.intel.com
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/