[an error occurred while processing this directive] Bill's Lam/xmpi Page

Bill's Lam/xmpi Page

Lam Information

For more information check out the LAM man page (man LAM).

Lam Homepage

Xmpi Homepage

Lam Easy Start Guide

Lam Release Notes

Lam Manual (Postscript)

Xmpi Page

Also look into the documentation directory:

/u2/bsiever/lam61/doc

Setting up to run Lam

1. Make sure that your default shell initialization script is setup as world readable. This may mean that you need to set the acl on your root directory OR create a public directory and create a link from your shell initialization script in your root directory to a file in the public directory.

2. Now modify your shell initialization script so that it sets the Lam environment variables.

You'll need to set the Following Values:

LAMHOME = /u2/bsiever/lam
LD_LIBRARY_PATH = ${LD_LIBRARY_PATH}:/usr/dt/lib
MANPATH = ${MANPATH}:/u2/bsiever/lam/man
PATH = ${PATH}:/u2/bsiever/lam/bin

Example:

1. Set your directory world readable:

fs setacl ~ system:anyuser r

2. Set the environment variables in your .usercshrc (If you're running csh):

source /u2/bsiever/lam/lamcshrc

This file sets the LAMHOME variable as well as the PATH, MANPATH, and LD_LIBRARY_PATH.

Initializing Lam

Start Lam on all the nodes listed in the Default bhost.def file

lamboot -v

(The -v will indicate which nodes it has been successfully started on.

For more info. check the lamboot manpage)

Compiling with Lam

See the Makefiles provided in the test directory:

/u2/bsiever/lam/test

Running an MPI Program without xmpi

Check the mpirun homepage. (man -s 1 mpirun)

Also be sure to issue the mpirun that is part of the lam distribution rather than the

mpirun provided by the native mpilibrary.

Example:

mpirun n0-7 -c2c -O /u2/bsiever/lam/test/sieve/siever -- 1000000 25 1

n0-7: Run the program on nodes 0-7

-c2c : Direct Communication Optimization

-O : Data conversion optimization

/u2/bsiever/lam/test/sieve/siever : The Program to run

1000000 25 1 : The command line arguments

Running xmpi

Start Lam with lamboot
Compile your program with Lam
Start xmpi
Select "Application->Build&Run"
Use the Browser to pick your program(The Executable)
Select "ALL NODES"
Select "Use Full Pathname"
Fill in any command line Arguments
Click on the Down arrow (Above the words "Current Application" Note that this places the selected application in the Box.
Click on "Run" to run & analyze your application.

For More information check the xmpi man page.

Finializing Lam

When all test have been run, shutdown all the Lam servers with:

wipe -v

At the prompt enter the name of the host file. If you booted with

the default host file use "bhost.def".

(The -v will indicate which nodes have been successfully terminated.

For more info. check the wipe manpage)