Date: Fri, 13 Jan 2006 10:10:51 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Bruno Ducrot <ducrot@poupinou.org> Cc: Mike Jakubik <mikej@rogers.com>, freebsd-stable@freebsd.org Subject: Re: powerd effectiveness Message-ID: <200601131010.59992.doconnor@gsoft.com.au> In-Reply-To: <20060112134013.GC22983@poupinou.org> References: <43C5A261.1020407@rogers.com> <43C5F328.4030507@rogers.com> <20060112134013.GC22983@poupinou.org>
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--nextPart2639375.PunIk5R02t Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Fri, 13 Jan 2006 00:10, Bruno Ducrot wrote: > > Thats the correct one, it is 75mhz. I was suspecting hardwares > > limitations in terms of modulating the frequency quickly enough. Just > > wanted to make sure. > > What you have noticed is acpi_throttle(4). The combinaison of > some VIA chipset and AMD processors give 16 frequencies. > powerd(8) is not designed for thermal stuff, and will never be. > It's up to acpi_thermal(4) to cool the processor if needed. > > Note that I think acpi_throttle(4) can only be used for cooling a > processor. I don't think it is usefull for power comsuption at all for > which > powerd(4) is designed. Some other people may have different opinion of > course. I don't see how reducing power consumption could NOT affect the temperature. Nearly all of the energy going into the CPU is disipated as heat. > You may also want to check if sysutlis/fvcool can help you if setting > the above sysctl is not possible (but don't mix the two). How come? (I am just curious :) =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart2639375.PunIk5R02t Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQBDxukL5ZPcIHs/zowRAtDqAJ9cjn5Pcz8U1EBFF2p98HV/YA3JggCglSyU FGLJon5AD5NkFD8ncrVQvdM= =kSm7 -----END PGP SIGNATURE----- --nextPart2639375.PunIk5R02t--
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