[mvapich-discuss] Significance of process 0 in MPI operation.

[neha bhagat]

Hi,

I have implemented MPI_ALLtoAll() call and am testing it on 4 nodes 64
processes .
However it is observed that the data from Process 0 gets overwritten on
received buffers of other processes at same location.

So .What is the role of Process 0 in MPI communication?

Thanks & regards,
Neha
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