Hi Doug,
Sorry for the slow response, we're really busy these days...
I think this is awesome. Although most of these options are floating
point related, which is not typical for desktop apps, some low level
libs could probably be optimised better and we should also re-evaluate
our default optimisation options.
Thanks,
Laca
On Sun, 2006-05-14 at 21:58 -0700, Doug Scott wrote:
> Since pkgtool spec files make it easy to build/install apps, I decided to do
> some benchmarks to see if you get a decent increase in speed, if you build
> platform optimized libraries. Sun Studio 11 has some interesting options to
> turn on SSE2, AMD 3DNOW etc instructions so I wanted to turn these on and see
> if they give a good increase in performance over the default options supplied
> in the JDS build.
>
> The test platform I am using is a Acer Ferrari 4005, running Solaris 11
> Nevada build 38. The app is lame from FWlame.spec. For each build, I did 2
> runs with the CPU set to 800Mhz and 2000Mhz set using the powernowadm utility.
>
> The first thing I did was to do an un-optimized baseline build by setting
> CFLAGS="".
>
> The second build was using the JDS optimized flags CFLAGS="%optflags".
>
> The last build was built for the platform "pentium_pro+mmx" using the
> following -
>
> CFLAGS="`echo %optflags | sed -e 's/-xpentium//'` -xarch=sse2a -xchip=opteron
> -xcache=64/64/2:1024/64/16 -nofstore -xvector -xbuiltin=%all -xdepend
> -xlibmil -xlibmopt"
>
> LD_OPTIONS="-R%{_libdir}/\$ISALIST:%{_libdir} -lmvec"
> And after the configure added #include <sunmedia_intrin.h> to config.h
>
> To summarize the result, the JDS options give a [b]95%[/b] increase in
> performance over un-optimized baseline build. The pentium_pro+mmx build gave
> a [b]151%[/b] increase over the baseline, which is an increase of [b]28%[/b]
> over the JDS options.
>
> I have attached the raw results and the spec file for the pentium_pro+mmx
> build.
>
> Doug
>
>
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