[mvapich-discuss] Is a construct like this able to take advantage of GDR?

[Raghu Reddy]

A user has the following construct in the code that he is trying to
benchmark:

 

--------------------------------

!$acc host_data use_device(sedgvarRecv)

 

CALL MPI_IRECV(sedgvarRecv(:,:,:,:,n,varNumber), sedgvarSize, MPI_INTEGER,
.)

---------------------------------

 

I don't know if this is sufficient information provide the necessary context
to answer the question, but I was concerned that the array syntax in the
argument would cause problems because MPI would be using  temporary variable
to pass the argument.

 

Anyone has any comments if this is a valid construct for testing data
transfers from GPU to GPU?

 

Thanks,

Raghu

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cse.ohio-state.edu/pipermail/mvapich-discuss/attachments/20180213/4be1ba18/attachment.html>