Simone,
I think most of the issues with the numbers you're getting are coming from the
internal protocols of Open MPI and the way the compilers "optimize" the memcpy
function. In fact the memcpy function translate to different execution path
based on the size of the data. For large memory copie
Hello everybody,
I am measuring some timings for MPI_Send/MPI_Recv. I am doing a single
communication between 2 processes and I repeat this several times to get
meaningful values. The message being sent varies from 64 bytes up to 16
MBs, doubling the size each time (64, 128, 256,8M, 16M).
