Date: Fri, 14 Nov 2008 11:14:20 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Cyrille Szymanski <cnszym@gmail.com> Cc: FreeBSD acpi <freebsd-acpi@freebsd.org> Subject: Re: RFC: powerd algorithms enhancements Message-ID: <491D416C.6030207@FreeBSD.org> In-Reply-To: <ba5115170811131655i463050c1rd17af354f51f3e6a@mail.gmail.com> References: <491404BF.1090807@FreeBSD.org> <49186111.9020103@root.org> <49189B47.7090509@FreeBSD.org> <ba5115170811131655i463050c1rd17af354f51f3e6a@mail.gmail.com>
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Hi. Cyrille Szymanski wrote: >>> There's a patch Cyrille Szymanski has sent me to review that implements >>> the FLAT and PAST algorithms in powerd. I think we should not add new >>> modes that are heuristics (including this one) until we have a chance to >>> compare it to algorithms that have been the result of real research. >> So show it to us. This area is heuristic by default as there is several >> opposite criteriums, so any algorithm will be heuristic. > > Although I see the benefits of your proposal, and reckon that systems > with may levels are more and more common these days. The point is, I > think, to avoid adding tuning knobs to powerd that would be too > specific to your configuration and which might benefit everyone. There is natural trade-off between interactivity and power saving. So I don't think that "hiadaptive" mode is something too specific to my system. I haven't added any other tuning, even reduced amount of tuning that was required to make it work in some cases before. > Research will (I hope) indicate the way to go. So where I can get your patches or algorithms description? -- Alexander Motin
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