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Date: Mon, 20 Oct 2014 15:20:10 +0200
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: Tester for openblas needed
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Hi,
before making an official cygwin package for OpenBlas (fast Blas)
http://www.openblas.net/

I would like some test from potential users.
The dynamic library is multicore, so it should work on "all" processors,
but unfortunately I can only test on my dual Core i5-3320M.

On this system the speedup of basic BLAS operation is notable.

1000x1000x1000 DGEMM tests give

for x86_64 architecture
  0.818047 s      2444.847301 MFLOPS      x86_64  netlib reference
  0.055000 s      36363.636364 MFLOPS     x86_64  openblas 2.12

for i686 architecture
  0.825001 s      2424.239486 MFLOPS      i686    netlib reference
  0.095001 s      21052.409975 MFLOPS     i686    openblas 2.12

Libraries are available on:
http://matzeri.altervista.org/x86/openblas/libopenblas_dynamic/
http://matzeri.altervista.org/x86_64/openblas/libopenblas_dynamic/

To use them is enough to copy the cygblas-0.dll in any path
directory before "/usr/lib/lapack" where the lapack one is located.

On http://matzeri.altervista.org/works/openblas/
there is also a DGEMM test routine, if you have no other benchmark.

Thanks in advance
Marco


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