[petsc-users] AMD interlagos optimization flags

[Anton Popov]

On 3/5/13 11:38 PM, Dharmendar Reddy wrote:
> 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
Dharmendar,

indeed, it's better to use the same compiler for everything. Which 
gfortran version are you using? What is the option that is still 
missing? According to this page 
http://fortranwiki.org/fortran/show/Fortran+2003+status the Fortran 2003 
standard support is fairly extensive. We use gfortran 4.7.2 and a few 
features of Fortran 2003 in one of the applications.

Also the -std=f2003 -ffree-form options should not be forgotten.

>
> On Tue, Mar 5, 2013 at 4:02 PM, Anton Popov <popov at uni-mainz.de 
> <mailto: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 <mailto:dharmareddy84 at gmail.com>
>>     Phone: +1-512-350-9082 <tel:%2B1-512-350-9082>
>>     United States of America.
>>     Homepage: https://webspace.utexas.edu/~dpr342
>>     <https://webspace.utexas.edu/%7Edpr342>
>
>
>
>
> -- 
> -----------------------------------------------------
> 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 <mailto:dharmareddy84 at gmail.com>
> Phone: +1-512-350-9082
> United States of America.
> Homepage: https://webspace.utexas.edu/~dpr342 
> <https://webspace.utexas.edu/%7Edpr342>

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