[mvapich-discuss] one-sided passive communications

[Jim Dinan]

Hi All,

Here's an easy way for to poke the MPI progress engine:

{
   int flag;
   MPI_Iprobe(MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD,
              &flag, MPI_STATUS_IGNORE);
}

Best,
  ~Jim.

On 12/5/12 1:17 PM, sreeram potluri wrote:
> Jeff, thats true with MVAPICH2 as well. Thanks.
>
> Sreeram Potluri
>
> On Wed, Dec 5, 2012 at 1:57 PM, Jeff Hammond <jhammond at alcf.anl.gov
> <mailto:jhammond at alcf.anl.gov>> wrote:
>
>      >> If helper threads are not used, what is needed to get progress
>     in the
>      >> lock/unlock calls? Is it necessary to enter in any specific MPI
>     call in the
>      >> target process?
>      >
>      > Any of the MPI Test/Probe/Wait calls on the target will ensure
>     progress.
>
>     To add to this, I ~think~ that any other MPI calls that internally
>     call the progress engine will also drive progress, including blocking
>     send/recv and collectives.  I could be wrong though; my understanding
>     here is based upon MPICH, not MVAPICH2.
>
>     Jeff
>
>     --
>     Jeff Hammond
>     Argonne Leadership Computing Facility
>     University of Chicago Computation Institute
>     jhammond at alcf.anl.gov <mailto:jhammond at alcf.anl.gov> / (630)
>     252-5381 <tel:%28630%29%20252-5381>
>     http://www.linkedin.com/in/jeffhammond
>     https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond
>
>
>
>
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