PGI and HPL benchmarking

Daniel Kidger Daniel.Kidger at
Wed Sep 19 11:06:28 PDT 2001

I wrote:
>You do not say why you want to use PGI's BLAS ?
>Check out
>Their results show that Portland's BLAS implementation trails a long way
>behind ATLAS and Intel's MKL.

I investiagted a little further.
It seems that PGI's BLAS is compiled up with backward compatability so that
it will run on Pentium II's and lesser. Hence it makes no use of PIII and P4
instructions. i.e. no SSE / SSE2 or prefetching.

There is a note in the release notes about recompiing their BLAS, but my
distribution doesn't seem to have their source.


Dr. Dan Kidger, Quadrics Ltd.      daniel.kidger at
One Bridewell St., Bristol, BS1 2AA, UK         0117 907 5375
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