Date: Tue, 31 Jul 2007 23:43:10 +0900 From: Hajimu UMEMOTO <ume@freebsd.org> To: Pietro Cerutti <gahr@gahr.ch> Cc: freebsd-hackers@freebsd.org, freebsd-acpi@freebsd.org Subject: Re: [SOLVED] Re: [patch] enhance powerd(8) to handle max temperature Message-ID: <ygek5sg63cx.wl%ume@mahoroba.org> In-Reply-To: <46AF1276.8070808@gahr.ch> References: <46AA0491.5000203@gahr.ch> <yge7iol6zb8.wl%ume@mahoroba.org> <46ADAF5B.6050602@gahr.ch> <20070730180355.GA7355@rot26.obsecurity.org> <46AE58B5.3080506@gahr.ch> <yge4pjl1i7f.wl%ume@mahoroba.org> <46AECE8C.8000500@gahr.ch> <yge3az513b0.wl%ume@mahoroba.org> <46AEDB0C.6070706@gahr.ch> <46AF1276.8070808@gahr.ch>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, >>>>> On Tue, 31 Jul 2007 12:44:06 +0200 >>>>> Pietro Cerutti <gahr@gahr.ch> said: gahr> Nevermind, I finally got my passive cooling working. Congratulation! gahr> I don't know if the values of _TC1, _TC2 and TSP are meaningful, but it gahr> seems to work for me, having a _PSV value of 65C. gahr> Any suggestions on those values are welcome. The cpufreq is controlled according to the following formula: P [%] = _TC1 * ( Tn - Tn-1 ) + _TC2 * ( Tn - _PSV ) Pn = Pn-1 + HW[ - P ] where 0% <= Pn <= 100% And, this evaluation is examined every _TSP / 10 second. I'm not sure which values are appropriate for your box, but my laptop has the following values: Name (_TC1, Zero) Name (_TC2, 0x0C) Name (_TSP, 0x28) The values are same as you chose. Please refer the following document for detail: http://www.acpi.info/DOWNLOADS/ACPIspec-2-0c.pdf Sincerely, -- Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan ume@mahoroba.org ume@{,jp.}FreeBSD.org http://www.imasy.org/~ume/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?ygek5sg63cx.wl%ume>