[Intel-gfx] X11 performance regressions

[Chris Wilson]

On Wed, 11 May 2011 16:46:12 +0200, Knut Petersen <Knut_Petersen at t-online.de> wrote:
> Yes, I made some mistakes during my first measurements.
> 
> Below find better results. They are made on the same machine,
> with the same kernel, at the same speed, with the same x11perf
> program, absolutely nothing changed.
> 
> I used x11perfcomp -ro and sorted the output, worst results for
> the currrent git code first.
> 
> I think the numbers below are quite interesting ...

>      1        2    Operation
> --------  ------   ---------
>   965000.0   0.016   10x10 wide rectangle outline

Something is still not quite right here. This should be mostly CPU bound,
and even my Atom gets 734k.

Can you check that (a) it is CPU bound and (b) the worst offenders
according to the system profiler of your choice (e.g. perf)?

Thanks for doing this investigation.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre