[Bug 83436] Sudden framerate drops in multiple games

[bugzilla-daemon at freedesktop.org]

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

--- Comment #21 from smoki <smoki00790 at gmail.com> ---
(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

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