Date: Tue, 30 Aug 2005 02:52:03 +0900 From: Hajimu UMEMOTO <ume@FreeBSD.org> To: Nate Lawson <nate@root.org> Cc: Bruno Ducrot <bruno@FreeBSD.org>, cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/powerd powerd.c Message-ID: <yge1x4c8wcc.wl%ume@mahoroba.org> In-Reply-To: <43129EE6.7040608@root.org> References: <200508240752.j7O7qxep016309@repoman.freebsd.org> <ygemzn7zivx.wl%ume@mahoroba.org> <yge8xyr5zjq.wl%ume@mahoroba.org> <43129EE6.7040608@root.org>
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Hi, >>>>> On Sun, 28 Aug 2005 22:36:38 -0700 >>>>> Nate Lawson <nate@root.org> said: nate> Hello, I am back from vacation. As Kevin and Bruno will attest, I was nate> not happy to go down this path since you can't make everyone happy nate> without a proper predictive algorithm. For small numbers of levels, nate> this algorithm works fine. For large numbers of levels, it can nate> oscillate just as much as the previous algorithm when there is a nate> periodic load. I do not think you should add an option to tune the nate> parameters as this algorithm should be removed as soon as we have nate> something better. I don't want to make it permanent by adding nate> user-visible flags. Okay, it sounds reasonable to me. I'll go along with your plan. nate> The right fix is the project that was started by a Summer of Code nate> participant to profile a set of predictive algorithms and choose the nate> best. Some good background info about this is here if someone wants to nate> take up this task: nate> http://wikitest.freebsd.org/moin.cgi/powerd nate> Another mitigating factor is a patch I hope to commit soon that removes nate> levels that aren't useful. The general idea is the same as a recent nate> email from Tijl Coosemans but my approach is different. I'm looking foaward to the effort in this area. Sincerely, -- Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan ume@mahoroba.org ume@{,jp.}FreeBSD.org http://www.imasy.org/~ume/
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