From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gunter Ohrner Subject: Re: cpufreq: powernow-k8 frequency transitions question Date: Tue, 03 Jan 2006 01:16:07 +0100 Message-ID: References: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="iso-8859-1" To: cpufreq@lists.linux.org.uk Andi Kleen wrote: >> I already asked this question on linux-kernel@vger.kernel.org but maybe >> this list would be a more appropriate place... > The proceedings of the Ottawa Linux Symposium 2004 (available online) > have a detailed paper on the powernow-k8 driver. Ah, thanks. I found it, read it, and will soon compare the description to the current implementation. >From what I saw I already figured out the most important parts myself, as the driver is rather readable, but the paper contained some interesting additional details and reasons for some things I still wondered about. >> How do the conservative/ondemand cpufreq governors cope with the kernel >> advertising frequencies it cannot directly transition between? > Step by step. The frequency/voltage transistion functions > in powernow-k8.c go through them in loops. Oh, ok, I must have missed that part in the driver, I will look for it. Thanks a lot! :-) Greetings, Gunter --=20 The students were staring at her in the manner of those who have heard=20 of the species 'female' but have never expected to get this close to=20 one. -- (Terry Pratchett, Soul Music) *** PGP-Verschl=FCsselung bei eMails erw=FCnscht :-) *** PGP: 0x1128F25F ***