[petsc-dev] Handling ESSL + Lapack and PESSL

[Barry Smith]

On Sep 13, 2010, at 1:56 PM, Jed Brown wrote:

> On Mon, 13 Sep 2010 13:42:05 -0500, Barry Smith <bsmith at mcs.anl.gov> wrote:
>> My point is not only do they get a slower GEEV but they get a slower
>> everything in LAPACK. [...] Why not just use LAPACK?
> 
> Yup, I get your point.  But Lapack usually needs a BLAS, and the
> original (flawed) idea was that a fast BLAS would produce a competitive
> Lapack.
> 
   What, Jack made a mistake? Never.

    Does ESSL itself contain "the BLAS" or is there also a libblas type thingy on the IBM you could link against?

    None of this really matters because you are still stuck writing the configure test for geev.

    Barry


> Jed