Doug,
Very interesting results, what benchmark did you use?
Laszlo (Laca) Peter wrote:
> 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
>>
>>
>> This message posted from opensolaris.org
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