Re: [git] CFS-devel, latest code

Daniel Walker
2007-09-25T15:23:17Z

On Tue, 2007-09-25 at 08:45 +0200, Ingo Molnar wrote:
> * Daniel Walker <dwalker@mvista.com> wrote:
>
> > On Mon, 2007-09-24 at 23:45 +0200, Ingo Molnar wrote:
> > > Lots of scheduler updates in the past few days, done by many people.
> > > Most importantly, the SMP latency problems reported and debugged by
> > > Mike
> > > Galbraith should be fixed for good now.
> >
> > Does this have anything to do with idle balancing ? I noticed some
> > fairly large latencies in that code in 2.6.23-rc's ..
>
> any measurements?

Yes, I made this a while ago,

ftp://source.mvista.com/pub/dwalker/misc/long-cfs-load-balance-trace.txt

This was with PREEMPT_RT on btw, so it's not the most recent kernel. I
was able to reproduce it in all the -rc's I tried.

Daniel