lkml.org 
[lkml]   [2008]   [Aug]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [BUG] cpufreq: constant cpu_khz
From
Date
On Mon, 2008-08-25 at 11:22 -0700, Arjan van de Ven wrote:
> On Mon, 25 Aug 2008 19:57:12 +0200
> Ingo Molnar <mingo@elte.hu> wrote:
>
> >
> > * Dave Jones <davej@codemonkey.org.uk> wrote:
> >
> > > > hm, that too is due to the tsc.c unification - Alok Cc:-ed.
> > > > Applied your fix to x86/urgent.
> > >
> > > ACKed-by: Dave Jones <davej@redhat.com>
> > >
> > > Good catch Peter. I'm puzzled how that bug was latent on 64bit for
> > > so long with no-one realising though.
> >
> > i think it's the combination of these two factors:
> >
> > - bootup frequently is typically full-speed, so we calibrate things
> > right
> >
> > - cpufreq events are relatively slow-scale - and when they trigger
> > the system is definitely not under load. So how precisely the
> > scheduler functions isnt all that important in such scenarios -
> > there's tons of CPU power available.
> >
>
> - many many of the 64 bit capable cpus are constant-tsc anyway

Ironically I noticed it first on 64bit ;-)





\
 
 \ /
  Last update: 2008-08-25 21:29    [W:0.052 / U:3.040 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site