Date: Wed, 10 Aug 2016 00:55:06 +0100 From: Frank Shute <frank@woodcruft.co.uk> To: RW <rwmaillists@googlemail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Power consumption tuning Message-ID: <20160809235506.GA97161@lime.woodcruft.co.uk> In-Reply-To: <20160809165640.5aa087c2@gumby.homeunix.com> References: <20160809172345.312117ac@e733> <fa791a431671032e9f0f47a7f8807957@mail.zplay.eu> <20160809165640.5aa087c2@gumby.homeunix.com>
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On Tue, Aug 09, 2016 at 04:56:40PM +0100, RW via freebsd-questions wrote: > > On Tue, 09 Aug 2016 17:03:36 +0200 > Sol=C3=A8ne Rapenne wrote: >=20 >=20 > > Buying a device to measure the power consumption is also a good idea, > > so you can check your changes. > > It costs around 12=E2=82=AC. Example > > http://www.ecvv.com/product/1000019919.html >=20 > A lot of those cheap power meters will work with simple loads like > heaters or fridges, but are very inaccurate with computers. I have one > and I've heard a lot of bad reports about them. =20 If you've got a UPS (and you should have IMO) then you can get the power usage. Eg: $ apcaccess -p LOADPCT 33.0 Percent and: $ apcaccess -p NOMPOWER 210 Watts So I'm using ~70W ATM. Trivial to script a report maybe with the help of cron. I'd guess the accuracy is good enough for most purposes. I'm sure APC pub= lish such info on their website. Regards, --=20 Frank https://woodcruft.co.uk/
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