[petsc-dev] Handling ESSL + Lapack and PESSL

[Aron Ahmadia]

ESSL contains a BLAS, but you can get a nice standard LAPACK/CBLAS on
BlueGene by following these instructions:
http://www.pdc.kth.se/resources/computers/bluegene/LAPACK-CBLAS/LAPACK-CBLAS-build

A

On Mon, Sep 13, 2010 at 2:55 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20100913/b5def309/attachment.html>