Date: Thu, 26 Oct 2006 13:43:28 -0700 From: "Kevin Oberman" <oberman@es.net> To: Stepan Zastupov <redchrom@gmail.com> Cc: acpi@freebsd.org Subject: Re: powerd: add support for limiting cpu frequency on adaptive mode Message-ID: <20061026204328.C764F4504D@ptavv.es.net> In-Reply-To: Your message of "Fri, 27 Oct 2006 00:59:07 %2B0900." <20061026155906.GA904@stepan.ispsystem.net>
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--==_Exmh_1161895408_68145P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Can someone look on the pr > (http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/104689) I sent. Maybe > the patch is dirty but I think that idea is nice and with it battery > lives really longer. YES! When I am on battery for an extended time, I am very happy to have the system max out at a MUCH lower speed if I can keep basic capabilities for simple stuff like editing and such. Slight slow-downs are not an issue. That said, power consumption is NOT intuitive. If I am playing an MP3 (very constant CPU load) at a speed where the CPU is at about 80%, the system uses more power than when the CPU is at 30%. In either case, the MP3 playback is fine. (This was on my T30 with a 1.8G P4M CPU, so it's not the best for power use.) I know that Windows wants to reduce maximum CPU speed when running on battery, so I do believe this is a good thing. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1161895408_68145P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFFQR3wkn3rs5h7N1ERAl7WAKCkD4gUqNH3J5jJMzh8XWX5GPXZVQCfWpp7 izAHjAD//To2iYAD7xwKLog= =kGLt -----END PGP SIGNATURE----- --==_Exmh_1161895408_68145P--
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