Re: BFS vs. mainline scheduler benchmarks and measurements

[Nikos Chantziaras]

On 09/08/2009 11:04 AM, Ingo Molnar wrote:
> * Pekka Pietikainen<pp@xxxxxxxxxx>  wrote:
>
> > On Mon, Sep 07, 2009 at 10:57:01PM +0200, Ingo Molnar wrote:
> > > > > Could you profile it please? Also, what's the context-switch rate?
> > > >
> > > > As far as I can tell, the broadcom mips architecture does not have
> > > > profiling support. It does only have some proprietary profiling
> > > > registers that nobody wrote kernel support for, yet.
> > > Well, what does 'vmstat 1' show - how many context switches are
> > > there per second on the iperf server? In theory if it's a truly
> > > saturated box, there shouldnt be many - just a single iperf task
> >
> > Yay, finally something that's measurable in this thread \o/
>
> My initial posting in this thread contains 6 separate types of
> measurements, rather extensive ones. Out of those, 4 measurements
> were latency oriented, two were throughput oriented. Plenty of data,
> plenty of results, and very good reproducability.

None of which involve latency-prone GUI applications running on cheap 
commodity hardware though.  I listed examples where mainline seems to 
behave sub-optimal and ways to reproduce them but this doesn't seem to 
be an area of interest.
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