Re: BFS vs. mainline scheduler benchmarks and measurements

[Nikos Chantziaras]

On 09/12/2009 11:27 AM, Volker Armin Hemmann wrote:
> Hi,
>
> On Samstag 12 September 2009, Nikos Chantziaras wrote:
> > On 09/11/2009 09:33 PM, Volker Armin Hemmann wrote:
> > > this is with 2.6.31+reiser4+fglrx
> > > Phenom II X4 955
> > >
> > > KDE 4.3.1, composite temporary disabled.
> > > tvtime running.
> > >
> > > load:
> > > fat emerge with make -j5 running in one konsole tab (xulrunner being
> > > compiled).
> > >
> > > without NO_NEW_FAIR_SLEEPERS:
> > >
> > > tvtime is smooth most of the time
> > >
> > > with NO_NEW_FAIR_SLEEPERS:
> > >
> > > tvtime is more jerky. Very visible in scenes with movement.
> >
> > Is the make -j5 running niced 0?
>
> yes. It always is.
>
> > If yes, that would be actually the
> > correct behavior.
>
> maybe. But I do not complain about jerks at all. I have
>
> [ 3618.305918] hpet1: lost 1 rtc interrupts
>
> with tvtime running since I switched cpus - so something is wrong anyway.

Seeing the "lost 1 rtc interrupts" message makes me wonder if this could 
possibly relate to problems with the C1E state on AMD systems (missing 
timer interrupts):

  http://lkml.org/lkml/2008/6/12/127

That thread is one year old though and your Phenom II CPU was released 7 
months later.
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