Re: OpenBLAS ?

[Xianyi Zhang]

Hi all,

If you use Intel Sandy Bridge (AVX),  you should use ATLAS 3.9.xx version which supports AVX instructions.
We are going to optimize OpenBLAS on Sandy Bridge in this year. In our preliminary experiment, we obtained the MKL comparable DGEMM (double precision matrix mulitipication) performance on Intel Core i7.

Thanks

Xianyi

marco atzeri write:Sent: 12-4-3 Afternoon 6:11

On 4/3/2012 11:21 AM, Sergei Steshenko wrote:

Hello,

has anybody tried OpenBLAS ( http://xianyi.github.com/OpenBLAS/ ) with Octave and how does it compare to ATLAS ?

Thanks,
   Sergei.

tested v0.1alpha2.5 on cygwin octave3.6.1 with sciview
benchmark (attached).

Same ball park than Atlas 3.9.68 but on

"Eigenvalues of a 320x320 random matrix" is substantial slower (x5)
also of reference blas/lapack .

It could be caused by incorrect optimization for my core or by a
cygwin specific glitch

Regards
Marco

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