Newsgroups: comp.parallel.mpi
From: zmc@uh.edu (Zhuo-Min Chen)
Subject: MPI Timing on Ibm SP2
Organization: University of Houston
Date: 20 May 1996 16:52:21 GMT
Message-ID: <4nq805$jli@masala.cc.uh.edu>

Because when you do MPI passing, each node may arrive
at your starting timer at different time. To be 
consistent, you should place MPI_Barrier before 
starting timer and ening timer. Otherwise, one
would expect the difference shown here

