#!/bin/bash
# test for loadavg frequencies

: ${width:=720}

case "$1" in
m*) # make
	# three load gauges for:
	# avg load in interval (checked every msec),
	# 12 probes avg load as computed with given frequency
	# 12 probes avg load as of /proc/loadavg or sysinfo() (about 1 min)
	rrdtool create loadavg.rrd -b 946684800 -s 5 \
		DS:intv:GAUGE:60:0:U \
		DS:freq:GAUGE:60:0:U \
		DS:kern:GAUGE:60:0:U \
		RRA:AVERAGE:0.5:1:$width
	exit
	;;
l*)	# load, e.g. l -l30
	shift
	gcc -lm loadavg.c
	./a.out "$@" -i$width | rrdtool -
	;;
g*) # graph
	rrdtool graph "${2:-loadavg}.png" -w $width -h 200 -t "${3:-loadavg}" \
	-s 946684800 -e $[946684800 + 5*$width] \
	DEF:intv=loadavg.rrd:intv:AVERAGE \
	DEF:freq=loadavg.rrd:freq:AVERAGE \
	DEF:kern=loadavg.rrd:kern:AVERAGE \
	LINE1:intv#00CC0088:"interval load" \
	LINE1:freq#0000CC88:"avg at test load_freq" \
	LINE1:kern#CC000088:"kernel 1-min avg"
	;;
w*) # width 1440
	export width=$2
	shift 2
	exec $0 "$@"
	;;
*) # do it all w/ params for loadavg.c
	$0 make
	$0 load "$@"
	$0 graph
	;;
esac