#!/bin/bash
#
# Script Name : mpijob
# Purpose : used to run MPI jobs in the interactive batch environment
#           (via "qsub -I -l nodes=N")
#           The script provides the nodes info needed for multiprocessor job
# Executable is entered as command line input, $1
# Note that if you submit this script from the directory where
#    the executable resides, then $1 is just the executable
#    name, otherwise you must provide absolute path too.
# Note also that if your program expects commandline input, just enter them
# after the executable name. In the event of multiple entries, enclose
# them with double quotes.
#
# Usage :
# nodem032 % mpijob exec-name
# nodem032 % mpijob exec-name "infile outfile"
#
# Author : Kadin Tseng, SCV, Boston University
# Date   : October, 2003

if [ -z $1 ]; then
  echo "This script expects an argument (executable file)"
elif [ -x $1 ]; then
  NP=`wc -l $PBS_NODEFILE |awk '{print $1}'`
  echo The assigned nodes are `cat $PBS_NODEFILE`
  echo The executable is $1
  mpirun -machinefile $PBS_NODEFILE -np $NP $1 $2
else
  echo "mpijob usage: mpijob /path.../exec-name"
fi