Date: Fri, 18 Jan 2008 14:07:28 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Dag-Erling =?utf-8?q?Sm=C3=B8rgrav?= <des@des.no> Cc: njl@freebsd.org, bruno@freebsd.org, Stefan Lambrev <stefan.lambrev@moneybookers.com>, freebsd-current@freebsd.org, Igor Mozolevsky <igor@hybrid-lab.co.uk>, Maxim Sobolev <sobomax@digifonica.com> Subject: Re: powerd adaptive mode latching Message-ID: <200801181407.36360.doconnor@gsoft.com.au> In-Reply-To: <86myr4n4gp.fsf@ds4.des.no> References: <a2b6592c0801110351l382959ffh1d55f2bcd2e6ca1b@mail.gmail.com> <200801171115.43663.doconnor@gsoft.com.au> <86myr4n4gp.fsf@ds4.des.no>
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--nextPart2288516.ogWvC6iNXF Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thu, 17 Jan 2008, Dag-Erling Sm=C3=B8rgrav wrote: > "Daniel O'Connor" <doconnor@gsoft.com.au> writes: > > One problem with it is that it lags behind actual usage by a few > > seconds (presumably averaging it). > > It is based on the (didle/dt) / (dtotal/dt) fraction computed from > kern.cp_time, which can take a while to ramp up. This is not easily > seen in a cursory reading of the code, as the fraction is computed in > a very roundabout way. I meant the current usage reported by ACPI. Presumably totally up to the BIOS implementation as to how it works.. > > Turning the LCD off saves about 4W too. > > Hmm, it would be interesting to experiment with varying backlight > brightness based on system load :) Heh, sounds like a great way to get a headache 8-) =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart2288516.ogWvC6iNXF Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBHkB8A5ZPcIHs/zowRAltDAJ9VnVTx/hB2O5OFZxnUGaSGI5GuswCfboXJ rEa0RXx5PxmAWYCl1lEBy5A= =L9zl -----END PGP SIGNATURE----- --nextPart2288516.ogWvC6iNXF--
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