[Bug 83436] Sudden framerate drops in multiple games

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=83436

--- Comment #24 from Dieter Nützel <Dieter@nuetzel-hh.de> ---
(In reply to comment #23)
> (In reply to comment #22)
> > (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
> 
>  So what is the solution for that after one month? Simply to use -O0 maybe :)

Ping Jason Ekstrand, maybe 8-)

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