From: William <b991793@mailserv.cuhk.edu.hk>
Newsgroups: comp.parallel.mpi
Subject: Tuning the performance of MPICH
Date: Sat, 26 Sep 1998 10:22:44 +0000
Organization: Computational Chemistry
Message-Id: <360CC073.26FA9607@mailserv.cuhk.edu.hk>
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Hi,

    I am the beginner using the mpich in order to do parallel scientific
computing.
    I have installed the mpich already. Recently, I am tuning the mpich
in order to have a better performance. The cluster of workstations
contains two DEC alpha workstations connected through TCP/IP network.
Each port can provide the maximum transfer rate at 100 mega bit per
second.
    The application program has been tested in such an environment. The
configuration of mpich is as follows.
    configure -device=ch_p4 -arch=alpha -cflags="-std" -opt=-O3
-file_system=ufs -nodevdebug

And I've varied the P4_SOCKBUFSIZE variable from 4kb to 128kb. I found
that I can get ~3 % improvement in speed.
    Can anyone tell me how to optimize performance of mpich in the
workstation cluster?
    Thanks for your consideration.

William Yim