one-sided communication in Intel MPI

one-sided communication in Intel MPI

M Wang's picture
M Wang
Thu, 06/10/2010 - 08:52

Does Intel MPI Library support passive target one-sided communication? How about the perforamnce?
It seems the performance of passive target one-sided operations implemented through MPI-2
windows is very poor. The implementation of RMA in Intel MPI is not truly
one-sided. When a process call MPI_Get/Put, the target process won't response if it is busy on its own work.

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Dmitry Kuzmin (Intel)'s picture
Dmitry Kuzmin (Intel)
Fri, 06/18/2010 - 02:54

Hi M Wang,

Yes it does. Intel MPI Library does supported passive one-sided communication. Performance... I don't know.
When you call MPI_Get/Put real communication will not be started until MPI_Win_Fence is called.

Regards!
Dmitry

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