[Paraview] pvserver maxed out

[Randy Heiland]

When I try that (on my MacBook Pro w/ 2 procs):
mpirun --mca mpi_yield_when_idle 1 -np 2 pvserver

I still have one CPU pegged at 98%.  Are you saying that shouldn't be  
the case?

-Randy

On Jun 16, 2009, at 3:47 PM, David Thompson wrote:

>
>> 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.
>
> This is configurable on the mpirun command line:
>
> http://www.open-mpi.org/faq/?category=running#force-aggressive- 
> degraded
>
> If you set the MCA parameter mpi_yield_when_idle to a non-zero value,
> OpenMPI will not aggressively poll inside MPI routines. For example:
>
>  mpirun --mca mpi_yield_when_idle 1 -np 4 pvserver
>
> David
>
>> 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
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at
>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>
>>>>> Please keep messages on-topic and check the ParaView Wiki at:
>>>>> http://paraview.org/Wiki/ParaView
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> http://www.paraview.org/mailman/listinfo/paraview
>>>>
>>>>
>>>>