[mvapich-discuss] blocking vs polling with PSM

[David Winslow]

Hari

We are running 328 processes on 14 servers with 512 total cores. We'll try
the parameter you provided. Is there anything specifically designed to not
use polling such as MV2_USE_BLOCKING=1?

I'll let you know the results using MV2_ON_DEMAND_THRESHOLD=1.

Thanks for your assistance,
David





On Tue, Aug 5, 2014 at 2:11 PM, Hari Subramoni <subramoni.1 at osu.edu> wrote:

> Hi David,
>
> Could you please let us know how many processes you are running it with?
> Can you try running with MV2_ON_DEMAND_THRESHOLD=1 and retry?
>
> Regards,
> Hari.
>
>
> On Tue, Aug 5, 2014 at 10:57 AM, David Winslow <
> david.winslow at serendipitynow.com> wrote:
>
>> We have a multi-process, multi-threaded MPI application using MVAPICH 2.0
>> rc2 over PSM. Based on my reading of the documentation, using the
>> blocking mode of communications rather than polling would improve our
>> performance in our particular application. Using -genv MV2_USE_BLOCKING=1;
>> however, doesn't seem to work.
>>
>> Is blocking supported for PSM? If not, is there an alternative to reduce
>> or eliminate polling?
>>
>> Thanks
>> David
>>
>> _______________________________________________
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>>
>>
>
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