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From: Oliver Neukum <oliver@neukum.org>
To: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Cc: "Kok, Auke" <auke-jan.h.kok@intel.com>,
	Pavel Machek <pavel@ucw.cz>,
	Arjan van de Ven <arjan@infradead.org>,
	kernel list <linux-kernel@vger.kernel.org>
Subject: Re: gigabit ethernet power consumption
Date: Wed, 10 Oct 2007 08:35:05 +0200	[thread overview]
Message-ID: <200710100835.05555.oliver@neukum.org> (raw)
In-Reply-To: <20071009182857.GF4003@csclub.uwaterloo.ca>

Am Dienstag 09 Oktober 2007 schrieb Lennart Sorensen:

> Now if you were trying to transfer a lot of data to the laptop, would it
> be more power efficient to do it at gigabit speeds so you can finish
> sooner and shut down the machine entirely, or to slow to 100mbit and
> take longer to do it, and hence spend more time powering the cpu and
> ram?

There's an amount of data which would be the cutoff point.

But I don't think you can by default make machines slower. So as soon as
the link is saturated you have to switch to the higher speed. To avoid a
ping-pong effect I'd use a timer for bringing the link speed down again.

	Regards
		Oliver




  parent reply	other threads:[~2007-10-10  6:33 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-08 22:07 Pavel Machek
2007-10-08 22:31 ` Kok, Auke
2007-10-09  5:18   ` Willy Tarreau
2007-10-09 18:28   ` Lennart Sorensen
2007-10-09 18:41     ` Kok, Auke
2007-10-10 20:44       ` Mark Gross
2007-10-11 15:33         ` Kok, Auke
2007-10-11 11:35       ` K.Prasad
2007-10-11 15:18         ` Kok, Auke
2007-10-10  6:35     ` Oliver Neukum [this message]
2007-10-09  5:08 ` Chris Snook
2007-10-09  6:58 ` Oliver Neukum
     [not found] <9c8XH-7gs-13@gated-at.bofh.it>
     [not found] ` <9c9qN-7Rn-19@gated-at.bofh.it>
     [not found]   ` <9cs0n-3Dc-9@gated-at.bofh.it>
     [not found]     ` <9csjH-43E-33@gated-at.bofh.it>
     [not found]       ` <9d4yC-5hT-7@gated-at.bofh.it>
     [not found]         ` <9d7ZJ-2mI-11@gated-at.bofh.it>
2007-10-12  2:08           ` Bodo Eggert
2007-10-12 16:35             ` Kok, Auke
2007-10-12 20:30               ` Valdis.Kletnieks
2007-10-12 20:46                 ` Kok, Auke
2007-10-17 13:00                   ` Lennart Sorensen
2007-10-17 16:38                     ` Kok, Auke

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