Date: Tue, 20 Mar 2012 18:47:23 -0500 From: Brandon Gooch <jamesbrandongooch@gmail.com> To: Matthias Gamsjager <mgamsjager@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: powerd and increase in energy need Message-ID: <CALBk6y%2BLY9K=061LEbKM2vUcAeVD8B051=s=go=KnCjMY4v1RQ@mail.gmail.com> In-Reply-To: <CA%2BD9Qhv5EmrkqvLetx9T5WD_1BRuCpUyZ=VYnRSjwRYqA7phdg@mail.gmail.com> References: <CA%2BD9Qhv5EmrkqvLetx9T5WD_1BRuCpUyZ=VYnRSjwRYqA7phdg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Mar 20, 2012 at 3:41 PM, Matthias Gamsjager <mgamsjager@gmail.com> wrote: > Hi, > > my zfs nas has an Asus p5e motherboard (x38 chip) and an intel q9300 (quad > core 2,5Ghz) processor with all the energy save setting enabled in the > bios. Today I connected the power cord to a voltcraft energy meter to see > how much energy the whole system needs in idle mode. > > I found out that with powerd running the cpu get clocked down to 499 mhz > with is nice. The funny thing is that this doesn't decrease the amount of > watts the machine need. 2,5ghz or 499mhz doen't matter at all. It gets even > funnier. With powerd running the systems actually needs 4 watts more then > without powerd running. > > Isn't the whole point of powerd to to decease the energy needs of a > machine? or is it utterly broken with this cpu generation? You probably want to check out the following article on the FreeBSD wiki: http://wiki.freebsd.org/TuningPowerConsumption The low-power states should be available to you after following the configuration guide. -Brandon
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CALBk6y%2BLY9K=061LEbKM2vUcAeVD8B051=s=go=KnCjMY4v1RQ>