[petsc-users] AMD interlagos optimization flags

[Dharmendar Reddy]

Hello Anton,

For me the problem is with gfortran. I use certain  object oriented
features available in Fortran 2003. When i last tested few months agao, my
code does not compile with gfortran. I guess it is required/suggested to
use the same compiler for petsc and the external code which uses petsc. Am
i right ? My code relies heavily on  zgemm which i use via direct call to
lapack or via petsc. ACML also has ifort64_fma4 i was hoping they tweaked
it to optimal performance on the new AMD processors.

Thanks
Reddy

On Tue, Mar 5, 2013 at 4:02 PM, Anton Popov <popov at uni-mainz.de> wrote:

>
> On 3/5/13 9:23 PM, Dharmendar Reddy wrote:
>
> Hello,
>         Has any one installed petsc on the AMD 6200 series processor
> systems? I have a small cluster with quad socket AMD 6274 (16Core)
> processors. Should i use any special optimization flags or let petsc
> configure script decide ?
>
> I would like have two flavors of the instillation:
>
>    1.  intel 13.2 compilers using intel mpi and intel MKL 11.0
>    2.  intel 13.2 compilers using intel mpi and ACML 5.3 compile with
>    intel. Now ACML has a weird organization of the libraries. It has same
>    names for both the 64bit and 32 bit integer libraries but saved in
>    different folders. Should i link to single thread or multithreaded acml ?
>
>  Dharmendar,
>
> I use
> --COPTFLAGS="-mavx -mfma4 -O3"
> --FOPTFLAGS="-mavx -mfma4 -O3"
>
> and single-threaded ACML optimized for fma4 instruction set ( i.e.
> gfortran64_fma4/lib/libacml.a)
> Obviously, I use gcc and gfortran. All works fine. No need for Intel on
> this machine. If you think gcc is much slower, just try with optimization.
>
>
>    1.
>
>
>
> --
> -----------------------------------------------------
> Dharmendar Reddy Palle
> Graduate Student
> Microelectronics Research center,
> University of Texas at Austin,
> 10100 Burnet Road, Bldg. 160
> MER 2.608F, TX 78758-4445
> e-mail: dharmareddy84 at gmail.com
> Phone: +1-512-350-9082
> United States of America.
> Homepage: https://webspace.utexas.edu/~dpr342
>
>
>


-- 
-----------------------------------------------------
Dharmendar Reddy Palle
Graduate Student
Microelectronics Research center,
University of Texas at Austin,
10100 Burnet Road, Bldg. 160
MER 2.608F, TX 78758-4445
e-mail: dharmareddy84 at gmail.com
Phone: +1-512-350-9082
United States of America.
Homepage: https://webspace.utexas.edu/~dpr342
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