Newsgroups: comp.parallel.mpi
From: pkc@scs.carleton.ca (Peter Choynowski)
Subject: Slow LAM/MPI localhost performance ?
Organization: School of Computer Science, Carleton U., Ottawa, Canada
Date: 11 Mar 1996 17:26:24 GMT
Message-ID: <4i1no0$9ct@bertrand.ccs.carleton.ca>


I have been measuring localhost  LAM/MPI performance, and I am finding
that my  numbers are lower  than I would  expect. The test  involves a
send and a receive task, sending 4K messages on a P5/133 running Linux
1.3.69.


localhost -> localhost 936 KB/s
localhost -> localhost (-c2c option on mpirun ) 3026 KB/s

ttcp localhost -> localhost  7858KB/s

Are my expectations too high in  reaching close to 7858 KB/s range for
local messaging :)

TIA,
Peter

