Re: [Pypar-developers] multicore machines with pypar

[Jordan A. <jc...@co...>]

Hi Ole and all,

I get:

C:\Python25\Lib\site-packages\pypar>mpirun -np 4 python test_pypar.py
Unable to launch 'C:\Python25\Lib\site-packages\pypar\python', error 2:
CreateProcess failed: The sy
stem cannot find the file specified.

So the same error.  It's unclear to me where (i.e. in what function) the
error is even being generated...

I really appreciate any suggestions you may have.

--Jordan--





On Wed, Sep 30, 2009 at 10:28 PM, Ole Nielsen
<ole...@gm...>wrote:

> 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
>>>
>>
>>
>>
>