On Sun February 20 2005 14:01, hjk wrote: > [dom 20/02/2005, ore 13:26] => Carl Hudkins scriveva: > > processor : 0 > > cpu : 7400, altivec supported > > temperature : 15-17 C (uncalibrated) > > clock : 450MHz > > revision : 2.9 (pvr 000c 0209) > > bogomips : 894.97 > > ^^^^^^^^^^^^^^^^^^^^^^^^^ > > hey, wait a minute! > how comes that you have 895 bogomips with a 450Mhz G3? > this is my cpuinfo, i have a 1Ghz Powerbook G4 and all I get is > 664 Bogomips!
Well, I just discovered it's really a G4... so that probably makes a difference. I don't know how "bogomips" is calculated, so maybe something else about your CPU, motherboard, or kernel is affecting it. Hm... http://www.clifton.nl/ seems to indicate that bogomips is directly proportional to clock speed for PPC machines, so maybe it's something about the fact that you're running on a laptop. Is there some kind of "reduced power" mode that makes it run at half-speed, for example? I'm just guessing here. :) Aha... Google found some info for me, which leads back to the kernel. It seems the default speed on PowerBooks is about 2/3 of maximum, probably in order not to make the thing extremely hot and such. If you're trying to squeeze every bit of power out of your PowerBook, you may need to enable CPU frequency scaling in the kernel. Check out /usr/src/linux/Documentation/cpu-freq/user-guide.txt -- there are different policies you may use to change how and when the frequency and/or voltage changes. Note that I have not used this... probably some folks on this list have, though. I see someone has come up with the Gentoo FAQ for this, in fact. :) I'm going to leave the rest to the experts now. -- // Carl Hudkins :: Jabber [EMAIL PROTECTED] :: PGP 50238D9E // // ==] What would Jeeves do? [== // // (X-Spam-To: [EMAIL PROTECTED]) -- gentoo-ppc-user@gentoo.org mailing list
