Date: Sat, 8 Oct 2011 15:30:29 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Harald Servat <redcrash@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Power usage on FreeBSD Message-ID: <20111008123029.GD1511@deviant.kiev.zoral.com.ua> In-Reply-To: <CAEOTYRfrputiNPuGtehOsf6VdY-zj6nFEo57vR=7DEv70tbJ1A@mail.gmail.com> References: <CAEOTYRfrputiNPuGtehOsf6VdY-zj6nFEo57vR=7DEv70tbJ1A@mail.gmail.com>
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--Anc4Ty0odT0wy+qc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Oct 08, 2011 at 01:44:37AM +0200, Harald Servat wrote: > Dear hackers, >=20 > does anyone know if I can measure power consumption of the processor via > software by using FreeBSD on a Intel Core i5? Any pointer on this, or oth= er > architectures, will be welcome. >=20 > Thank you very much in advance! Measuring the power consumption by CPU would probably require you to get some NDA documentation from Intel. On the Core-class CPUs there are definitely the facilities related to the Turbo Mode, that show inner working of the power management microcontroller. See the Linux IPS driver, which controls both CPU and Northbridge/GPU. I was unable to find a public documentation about it. Some information is present in the CPU/PCH datasheets. On the other hand, if you are only concerned about whole system power consumption, use a laptop or a managed UPS. --Anc4Ty0odT0wy+qc Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk6QQmQACgkQC3+MBN1Mb4gJPgCgiU20WJkBo9I8Vk34vk6ep7yH 1y8AoK1bQfzLtNUbb7FmhUQy1ZxaRUHM =Q1vN -----END PGP SIGNATURE----- --Anc4Ty0odT0wy+qc--
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