[Beowulf] MPI_Alltoall

Rita Zrour rittta80 at yahoo.com
Tue Apr 12 05:29:41 EDT 2005


Hello I have a question,
when i do many  MPI_Alltoall in my program always the
first MPI_Alltoall take too much time to be done. 

I don't know where the first communication is always
expensive. Is that a problem of memory???????

thanks.


		
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