[Bug 83436] Sudden framerate drops in multiple games

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Comment # 22 on bug 83436 from
(In reply to comment #21)
> (In reply to comment #20)
> > (In reply to comment #19)
> > > (In reply to comment #18)
> > > >  Just tried oibaf's radeonsi_dri.so to copy here on Debian (just to be sure
> > > > :D) and it suffers from the same problem with -march=generic ;)
> > > 
> > >  I mean -mtune=generic of course :).
> > > 
> > >  Now to bisect where that SSE4.1 code start to compile this slow (4
> > > minututes on Kabini just for that) :D Issue also not present on 64bit ;)
> > 
> > I haven't seen the perf issue on my pure 64 bit setup, but have noticed that
> > the compile sits on sse4.1 for a while recently - just using one core, like
> > it's blocking the other threads of a make -j5 till it's done.
> 
>  Oh i bisected that ine, it takes 200X more time to compile on 32bit :D ,
> actually compile libmesa_gallium i think this is the commit:
> 
>  http://cgit.freedesktop.org/mesa/mesa/commit/
> ?id=d55f77b503ab7b59ecdd8f31c4f7dc498710e75b

For this look, here:

http://lists.freedesktop.org/archives/mesa-dev/2014-August/065823.html

Greetings and happy 'bisecting'...;-)

Dieter


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