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Date: Wed, 11 Jun 2008 15:52:57 +0200 (CEST) From: Jan Engelhardt <jengelh@...ozas.de> To: Arjan van de Ven <arjan@...radead.org> cc: "Kok, Auke" <auke-jan.h.kok@...el.com>, solsTiCe d'Hiver <solstice.dhiver@...il.com>, linux-kernel@...r.kernel.org Subject: Re: PROBLEM: no cpu MHz in /proc/cpuinfo on 2.6.25.4-rt6 On Wednesday 2008-06-11 15:36, Arjan van de Ven wrote: >> >> btw this is scary; the Mhz line in /proc/cpuinfo doesn't have much >> >> meaning really, so applications using it and depending on it is a >> >> rather big disaster ;-( >> >> >> >> Does anyone know why jackd wants to use this? >> >> It would be nice to have a /sys file where the CPU frequency is in, > >may I ask why? What would you do with it? Off the top off the head, just for reporting to the user. Desklets and stuff. >If it says 100Mhz, what would you conclude? That you have a slow cpu? >Or that you have a really fast CPU that currently runs at a low >frequency because you're mostly idle and are saving power? > >CPU frequency is... >1) not something that is fixed; it changes all the time >2) not a good indication for performance; remember the 3.4Ghz pentium4, >a 2Ghz Core2Duo outperforms it >3) something which the cpu itself barely honors (the clock stops during >idle etc etc) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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