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    SubjectRe: [RFC] sleepy linux
    On Wed 2007-12-26 12:43:56, H. Peter Anvin wrote:
    > Oliver Neukum wrote:
    >> Am Mittwoch, 26. Dezember 2007 19:56:59 schrieb H. Peter Anvin:
    >>>> 3) Network card that is either down
    >>>> or can wake up system on any packet (and not loose too many packets)
    >>>>
    >>> This is the big crux I see. You're going to constantly wake up the
    >>> machine due to broadcast packets, and spend a lot of power just going in
    >>> and out of S3.
    >> How many machines care a lot about saving power while they are connected
    >> to an ethernet? Wlan might be more of a problem.
    >
    > A lot of them should. An inordinate amount of machines sit there burning
    > power for no reason. You can argue that S3 isn't needed -- that nohz +
    > C3/C4 + turning off the screen would be enough, and that might be
    > + legit.

    NOHZ + C4 + turn off screen + turn off disk + turn off SATA is still
    ~8W on thinkpad x60.

    S3 is ~1W.

    That's quite significant difference.

    (But yes, connected-to-ethernet is not most important use scenario.)
    Pavel
    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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