#!/bin/bash

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# [ICS VERSION STRING: unknown]

# get loadavg on all hosts and show busiest or least busy hosts

# This can be used to make sure hosts are idle before starting a MPI benchmark

# or to see if a benchmark is running

# optional override of defaults

if [ -f /etc/opa/opafastfabric.conf ]

then

   . /etc/opa/opafastfabric.conf

fi

. /usr/lib/opa/tools/opafastfabric.conf.def

. /usr/lib/opa/tools/ff_funcs

trap "exit 1" SIGHUP SIGTERM SIGINT

Usage_full()

{

	echo "Usage: opacheckload [-f hostfile] [-h 'hosts'] [-r] [-a|-n numprocs]" >&2

	echo "                      [-d uploaddir]" >&2

	echo "              or" >&2

	echo "       opacheckload --help" >&2

	echo "   --help - produce full help text" >&2

	echo "   -f hostfile - file with hosts to check," >&2

	echo "                 default is $CONFIG_DIR/opa/hosts" >&2

	echo "   -h hosts - list of hosts to check" >&2

	echo "   -r - reverse output, show least busy hosts, default is busiest hosts" >&2

	echo "   -n numprocs - show top numprocs hosts, default 10" >&2

	echo "   -a - show all hosts, default 10" >&2

	echo "   -d upload_dir - directory to upload loadavg to, default is uploads" >&2

	echo >&2

	echo " Environment:" >&2

	echo "   HOSTS - list of hosts, used if -h option not supplied" >&2

	echo "   HOSTS_FILE - file containing list of hosts, used in absence of -f and -h" >&2

	echo "   UPLOADS_DIR - directory to upload loadavg to, used in absence of -d" >&2

	echo "   FF_MAX_PARALLEL - maximum concurrent operations" >&2

	echo "example:">&2

	echo "   opacheckload" >&2

	echo "   opacheckload -h 'arwen elrond'" >&2

	echo "   HOSTS='arwen elrond' opacheckload" >&2

	exit 0

}

Usage()

{

	echo "Usage: opacheckload [-f hostfile] [-r] [-a|-n numprocs]" >&2

	echo "              or" >&2

	echo "       opacheckload --help" >&2

	echo "   --help - produce full help text" >&2

	echo "   -f hostfile - file with hosts to check," >&2

	echo "                 default is $CONFIG_DIR/opa/hosts" >&2

	echo "   -r - reverse output, show least busy hosts, default is busiest hosts" >&2

	echo "   -n numprocs - show top numprocs hosts, default 10" >&2

	echo "   -a - show all hosts, default 10" >&2

	echo "   -H - supress headers for script parsing" >&2

	echo >&2

	echo " Environment:" >&2

	echo "   FF_MAX_PARALLEL - maximum concurrent operations" >&2

	echo "example:">&2

	echo "   opacheckload" >&2

	echo "   opacheckload -f good" >&2

	exit 2

}

if [ x"$1" = "x--help" ]

then

	Usage_full

fi

numprocs=10

ropt=-r

while getopts f:h:n:d:aHr param

do

	case $param in

	h)

		HOSTS="$OPTARG";;

	H)

		skip_headers=1;;

	f)

		HOSTS_FILE="$OPTARG";;

	n)

		numprocs="$OPTARG";;

	d)

		UPLOADS_DIR="$OPTARG";;

	a)

		numprocs="1000000";;	# more than ever expected to be found

	r)

		ropt="";;	# sort from lowest to highest, shows least busy

	?)

		Usage;;

	esac

done

shift $((OPTIND -1))

if [ $# -ne 0 ]

then

	echo "opacheckload: extra arguments: $@" >&2

	Usage

fi

check_host_args opacheckload

# HOSTS now lists all the hosts, pass it along to the commands below via env

export HOSTS

unset HOSTS_FILE

# remove any stale data so we don't mistakenly report it below

for j in $HOSTS

do

	rm -f $UPLOADS_DIR/$j/loadavg

done

opacmdall -p 'cat /proc/loadavg > /tmp/loadavg' >/dev/null

opauploadall -p /tmp/loadavg loadavg >/dev/null

if [ -z $skip_headers ]; then

	echo "loadavg					host"

fi

for j in $HOSTS

do

	i=$UPLOADS_DIR/$j/loadavg

	if [ ! -e $i ]

	then

		echo "opacheckload: $j: Unable to get loadavg" >&2

	else

		l=`cat $i`

		echo "$l	$j"

	fi

done | sort -n $ropt|head -n $numprocs