Date: Thu, 11 Jan 2007 11:56:48 +0100 From: Bruno Ducrot <ducrot@poupinou.org> To: George Hartzell <hartzell@alerce.com> Cc: Peter Jeremy <peterjeremy@optushome.com.au>, freebsd-stable@freebsd.org Subject: Re: saving power in a Dell Poweredge 750. Message-ID: <20070111105648.GK4945@poupinou.org> In-Reply-To: <17829.13636.926529.357546@rosebud.alerce.com> References: <17829.9117.888327.881204@rosebud.alerce.com> <20070110183643.GI832@turion.vk2pj.dyndns.org> <17829.13636.926529.357546@rosebud.alerce.com>
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On Wed, Jan 10, 2007 at 10:49:40AM -0800, George Hartzell wrote: > Peter Jeremy writes: > > On Wed, 2007-Jan-10 09:34:21 -0800, George Hartzell wrote: > > >I hooked my kill-a-watt meter up and ran the machine for a couple of > > >days and it uses 88 watts (3.90KWH/44.01H). > > > > What was it doing for those couple of days? [...] > > It's a small time mail server and web host. It was running under its > real world load. > > > I presume you confirmed that cpufreq/powerd was actually functioning > > (ie the CPU frequency was being changed). > > Yep, or at least I confirmed that powerd -v from a shell cycled up and > down w/ demand, then I configured it to run as a daemon and confirmed > that was cpufreq was loaded and that powerd was running in the > background. > > > >That surprised me a bit, and seems to suggest that it's spending most > > >of its energy spinning fans or something. > > > > PSU overheads, fans, northbridge, video, RAM, disk, ... it all adds up. > > That's sort of what I was figuring, it is/was just that my laptop > experience with powerd and battery life suggested that there would be > more of a difference. > > > I can't specifically help with the Dell. > What specific driver(s) were loaded actually? A devinfo might help. Cheers, -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.
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