Ubuntu
linux-source-2.6.15 package

  1. Bug #30557
  2. Comment #57

Comment 57 for bug 30557

Revision history for this message
cellstije (marco-grimaldi) wrote : Re: [Bug 30557] Re: [Bug 30557] SMP looks like the problem

this bug is still present on feisty herd2 on a sony vaio fs11m (centrimo 1.6GHz)
kernel:
2.6.20-5-generic

changing max_cstate as follows, resolve the issue:

echo 1 > /sys/module/processor/parameters/max_cstate

On 7/12/06, Ben Collins <email address hidden> wrote:
> On Wed, 2006-07-12 at 23:04 +0000, Jer wrote:
> > I can confirm that this is a SMP related issue. I re-built my kernel
> > with the only differences being that I changed my CPU to a Pentium-M,
> > turned off SMP, and modified the ticks to 250/sec.
> >
> > Performance is back to that of Breezy on my Celeron-M 1.4Ghz laptop, and
> > I don't think its the different CPU settings, or the scheduler.
> > Interactivity, especially while in a terminal is also much improved.
>
> Basically what you did was recreate the -386 kernel.
>
> --
> cpu idle time in /proc/stat wrong
> https://launchpad.net/bugs/30557
>