problems with ACML and single precision

[Roberto Gori]

Thank you Matthew,

I tried,

now my configure looks like this:

>config/configure.py --with-mpirun=mpirun.lsf --with-shared=0  --with-precision=single --download-c-blas-lapack=yes

and I get the following error:

=================================================================================
             Configuring PETSc to compile on your system                         
=================================================================================
TESTING: configureLibrary from config.packages.BlasLapack(python/BuildSystem/config/packages/BlasLapack.py:384)                                                                               *********************************************************************************
         UNABLE to CONFIGURE with GIVEN OPTIONS    (see configure.log for details):
---------------------------------------------------------------------------------------
Should request f-blas-lapack, not --download-c-blas-lapack=yes since you have a fortran compiler?
*********************************************************************************

so i changed my configure:

>config/configure.py --with-mpirun=mpirun.lsf --with-shared=0  --with-precision=single --download-f-blas-lapack=yes 

=================================================================================
             Configuring PETSc to compile on your system                         
=================================================================================
=================================================================================                                                                                                                   
Compiling FBLASLAPACK; this may take several minutes                                                                                                                                    =================================================================================                                                                                                             
TESTING: checkMissing from config.packages.BlasLapack(python/BuildSystem/config/packages/BlasLapack.py:446)                                                                                   *********************************************************************************
         UNABLE to CONFIGURE with GIVEN OPTIONS    (see configure.log for details):
---------------------------------------------------------------------------------------
Need to use --download-c-blas-lapack when using --with-precision=longdouble/single
*********************************************************************************


I'm in loop.

Moreover to achieve better performance i would prefer to use acml instead of the BlasLapack sources.
Everything works when i build petsc 2.3.1 with the Intel's compiler. I'm not able to do that with petsc 2.3.2.

    Roberto
  ----- Original Message ----- 
  From: Matthew Knepley 
  To: petsc-users at mcs.anl.gov 
  Sent: Thursday, June 28, 2007 8:50 PM
  Subject: Re: problems with ACML and single precision


  Yes, you need to let us compile for single precision. Use the option in the
  error message.

    Thanks,

      Matt

  On 6/28/07, Roberto Gori <r.gori at cineca.it> wrote:
  >
  >
  > Hi,
  >
  > i'm trying to install PETSc 2.3.3-p3 on a Linux amd64 cluster.
  >
  > There's no problems wìth double precison but when I add the single precision
  > option to my configure command I get the following error:
  >
  > =================================================================================
  >              Configuring PETSc to compile on your system
  >
  > =================================================================================
  > TESTING: checkMissing from
  > config.packages.BlasLapack(python/BuildSystem/config/packages/BlasLapack.py:446)
  >
  >
  > *********************************************************************************
  >          UNABLE to CONFIGURE with GIVEN OPTIONS    (see configure.log for
  > details):
  > ---------------------------------------------------------------------------------------
  > Need to use --download-c-blas-lapack when using
  > --with-precision=longdouble/single
  > *********************************************************************************
  >
  >
  > This is my configure:
  > config/configure.py --with-mpirun=mpirun.lsf --with-shared=0
  > --with-blas-lib=/cineca/prod/acml/3.6.0/ifort64/lib/libacml.a
  > --with-lapack-lib=/cineca/prod/acml/3.6.0/ifort64/lib/libacml.a
  > --with-precision=single
  >
  >
  > Maybe ACML is not supported for single precision?
  >
  > Thanks
  >
  >     Roberto


  -- 
  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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