Why do you need an order? If you plan to send and receive on the same buffer, you should use the MPI constructs for that, namely MPI_IN_PLACE.

  George.

On Nov 27, 2013, at 07:20 , Saliya Ekanayake <esaliya@gmail.com> wrote:

Hi,

Just want to verify if sendrecv provides any guarantees as to which operation (send or receive) happens first. I think it is not, is it?

Thank you,
Saliya

--
Saliya Ekanayake esaliya@gmail.com 
Cell 812-391-4914 Home 812-961-6383
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