[Paraview] pvserver maxed out

[Berk Geveci]

I confirm that with mpich2 version 1.0.7, using the default device
(ch3:sock), the load of an idle pvserver is near 0. With ch3:nemesis,
all but one of the processes use a full cpu. With OpenMPI, I think all
processes use a full cpu.

In conclusion, if you are running pvserver on a Mac laptop, use mpich2
with default build options.

-berk

On Mon, Jun 15, 2009 at 9:11 PM, Berk Geveci<berk.geveci at kitware.com> wrote:
> For this reason, I use MPICH2 on my MacBook Pro and OpenMPI on my Mac
> Pro. I can't remember which device I ended up settling on - I think
> the default. If I remember correctly, ch3:nemesis was causing the same
> issue as OpenMPI.
>
> -berk
>
> On Mon, Jun 15, 2009 at 1:44 PM, Randy Heiland<heiland at indiana.edu> wrote:
>> Thanks Utkarsh.  Just to add to this thread, I asked some of the OMPI
>> developers and apparently it's not possible to avoid this behavior.
>> -Randy
>> On Jun 15, 2009, at 11:35 AM, Utkarsh Ayachit wrote:
>>
>> Yup, that's expected. That's because of your MPI implementation. OpenMPI
>> does a busy wait when waiting for mpi messages. I think there's an
>> environment variable or something that you can set to disable that, I am no
>> sure. Maybe someone on the mailing list knows, or try checking the OpenMPI
>> documentation.
>>
>> Utkarsh
>>
>> On Mon, Jun 15, 2009 at 11:28 AM, Randy Heiland <heiland at indiana.edu> wrote:
>>>
>>> When I use 'mpirun -np 2 pvserver'  on my dual core MacBook (either
>>> connecting to it via paraview client or standalone), it keeps one of my CPUs
>>> pegged at nearly 100%.  Is this to be expected?  (Just running the serial
>>> './pvserver' of course just generates 'Listening...Waiting for client...'
>>> with no CPU load).
>>>
>>> % ./pvserver --version
>>> ParaView3.7
>>>
>>> % ompi_info
>>>                Open MPI: 1.3.1
>>>
>>> thanks, Randy
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>>
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