benchmarking.

[IainS]

On 15 Jun 2008, at 15:24, Tobias Burnus wrote:

> Tobias Schlüter wrote:
>> IainS wrote:
>>> Is there a gfortran preferred or standard performance benchmark  
>>> suite?
>> gfortran is regularly tested with the Polyhedron benchmark suite  
>> <http://polyhedron.com/polyhedron_benchmark_suite0html> and with  
>> the SPEC fp benchmark suites <http://www.spec.org/>.
> See also: http://gcc.gnu.org/benchmarks/
>
> There you also find PowerPC 64 SPEC 2000 runs (third link).
>
>
> Regarding: The polyhedron test suite,
> http://www.polyhedron.co.uk/MFL6VW74649
>
> You can simply create a .par file yourself; it simply contains the  
> command incuding a "%n.f90 -o %n" for the file name.
>
> I currently use (see http://www.physik.fu-berlin.de/~tburnus/gcc- 
> trunk/benchmark/):
>
> gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop- 
> linear -ftree-vectorize -msse3 -O3 %n.f90 -o %n
>
> You can then run it using:
>
> ../pbharness  gfortran.par  quick.par
> ../pbvalid gfortran.run  ../../f90valid.in
>
> I'll send you a modified version of the pb*f90 files, which I was  
> able to compile with gfortran on MacOS (the default version  
> requires some extensions gfortran does not have).

Thanks very much, hopefully I'll try these overnight tonight.

I assume that on a multi-core or multi-processor machine it's  
conventional to force all but one core/processor off?

Iain