Re: [Pypar-developers] multicore machines with pypar

[Ole N. <ole...@gm...>]

Could you try

C:\Python25\Lib\site-packages\pypar>mpirun -np 4 python test_pypar.py

and let me know if that gives the same error?

Has anyone else on the list seen this?

Cheers and thanks
Ole


On Thu, Oct 1, 2009 at 2:49 AM, Jordan Atlas <jc...@co...> wrote:

>  Hi Ole,
>
>     Thanks for your response.  Following your advice, I was able to verify
> that I can get MPICH to run multiple processes that utilizes both of my
> machines' processors.
>
>     Now I'm having trouble getting the pypar tests to run.  If I type:
>
> C:\Python25\Lib\site-packages\pypar>mpirun -np 4 test_pypar.py
>
> Then I get the error:
>
> Unable to launch 'C:\Python25\Lib\site-packages\pypar\test_pypar.py', error
> 8: CreateProcess failed:
>  Not enough storage is available to process this command.
>
> I assume it is talking about "RAM" storage, but my machine has over 2GB of
> RAM free right now, so I don't understand the problem.  Am I calling the
> program correctly?
>
> Note that if I run test_pypar without calling mpirun, I get the output:
>
> C:\Python25\Lib\site-packages\pypar>test_pypar.py
> Pypar (version 2.1.0) initialised MPI OK with 1 processors
> I am processor 0 of 1 on node jca33-305.
>
>     Please let me know if my question is unclear.
>
> Thanks,
>
> --Jordan
>
>
>
> Ole Nielsen wrote:
>
> Hi Jordan
>
> Great that you got pypar installed!
>
> As for the number of processors it is really a matter for the underlying
> MPI implementation.
> If you run a C program, such as the include timing measurement, using MPI
> you would have the same issue.
>
> Depending on the MPI implementation there are different ways of telling how
> many CPUs you got.
> With LAM MPI, there is a .machines file, with OPENMPI it is a matter for
> mpirun to specify.
>
> Typically, you run you parallel program on e.g. 8 processes using
>
> mpirun -np 8 <parallel_program>
>
>
> Hope this helps
>
> Cheers
> Ole
>
>
> PS - everything is better if you use Linux, though :-)
>
>
> On Thu, Sep 24, 2009 at 4:16 AM, Jordan Atlas <jc...@co...> wrote:
>
>> Hi Ole,
>>
>>     After carefully following the readme instuctions and making a couple
>> changes to the compile files, I was able to get pypar installed on my
>> machine.  However, it reports that my machine only has one processor, even
>> though it has two.
>>
>>     Is there anything in particular I need to do to make sure pypar is
>> aware of multiple processors in windows?
>>
>> Thanks,
>>
>> --Jordan
>>
>> --
>> *Jordan Atlas*
>> Email: jc...@co...
>> Chemical and Biomolecular Engineering
>> Cornell University
>>
>
>
>