[petsc-users] [EXTERNAL] Re: Using MAGMA subroutines instead of LAPACK in SLEPc

[Teranishi, Keita]

Hi,

As far as I know, Magma's API us not exactly the same as the original LAPACK.  You may need to hack either Magma's Fortran API or internal SLEPC/PETSc source.

Thanks,
---------------------------------------------
Keita Teranishi
R&D Principal Staff Member
Sandia National Laboratories
Livermore, CA 94551

From: Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>>
Date: Thursday, June 20, 2013 1:42 PM
To: Harshad Sahasrabudhe <hsahasra at purdue.edu<mailto:hsahasra at purdue.edu>>
Cc: "petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>" <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>>
Subject: [EXTERNAL] Re: [petsc-users] Using MAGMA subroutines instead of LAPACK in SLEPc

On Thu, Jun 20, 2013 at 10:24 PM, Harshad Sahasrabudhe <hsahasra at purdue.edu<mailto:hsahasra at purdue.edu>> wrote:
Hi,

I'm trying to run the SLEPc Eigensolver on a machine with CPUs & GPUs. I found that a package called MAGMA implements LAPACK functions on heterogeneous systems (CPU + GPU). MAGMA has functions very similar to LAPACK so that we can go and replace a call to a LAPACK function with a call to a MAGMA function.

Now my question is, where can I apply such a hack inside SLEPc/PETSc so that the Eigensolver in SLEPc actually uses MAGMA functions instead of LAPACK functions? I'm using the PETSc 3.3-p6 and SLEPc 3.3-p3 versions.

Any help would be greatly appreciated!

You need to do this in PETSc configure. Use --with-f-blas-lapack-lib=[<MAGMA libs>]. We have never tried this, so I don't
know if they obey the entire interface.

  Thanks

Thanks and Regards,
Harshad



--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener
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