Date: Wed, 16 Jan 2008 10:09:53 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: njl@freebsd.org, bruno@freebsd.org, Stefan Lambrev <stefan.lambrev@moneybookers.com>, Igor Mozolevsky <igor@hybrid-lab.co.uk>, Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no>, Maxim Sobolev <sobomax@digifonica.com> Subject: Re: powerd adaptive mode latching Message-ID: <200801161009.55401.jhb@freebsd.org> In-Reply-To: <478930D2.90806@digifonica.com> References: <a2b6592c0801110351l382959ffh1d55f2bcd2e6ca1b@mail.gmail.com> <a2b6592c0801111119r148d3697hf75a59b7bf74d540@mail.gmail.com> <478930D2.90806@digifonica.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Saturday 12 January 2008 04:27:46 pm Maxim Sobolev wrote: > I wonder if somebody did measurement of power consumption with powerd > and without it on typical tasks. There is very interesting idea in the > last issue of ACM Queue that it might be much more beneficial to run CPU > at the full speed and then switch it to low-power mode as soon as > possible in the idle loop than to run longer at reduced speed for a > longer period of time. I haven't done hard tests, but even with C3 enabled on my laptop I find that anecdotally I get longer battey life with powerd enabled. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200801161009.55401.jhb>