License and source code is available at google code.
Just a simple script that displays processor usage graph in command line.
This is how it will look like when running:
…or longer version from more real-like usage:
There are two thresholds defined – above 40 % will be shown in yellow and above 60 % will be red.
Requirements (the ones that i can think of):
-
sleep (sleep for a fraction of second is not supported by older versions of sleep)
- mpstat
Example function used to draw in console:
function green()
{
echo -en "\033[s"
tput cup $1 $2
echo -en "\033[1;32m|\033[0m"
echo -en "\033[u"
}
33[s saves the current position of the cursor and 33[u restores it to saved position.
tput cup places the cursor in specific row and column.
Full script:
#!/bin/bash
# VARIABLES
columns=40
# FUNCTIONS #
function draw()
{
echo -en "\033[s"
tput cup $1 $2
echo -en "\033[1;3$3m$4\033[0m"
echo -en "\033[u"
}
function wipe()
{
echo -en "\033[s"
tput cup $1 $2
echo -en "\033[1;31m \033[0m"
echo -en "\033[u"
}
#############
# HIDE CURSOR AND CLEAR SCREEN #
tput civis & clear
while true; do
# COLLECT UPDATE
#
idle=`mpstat 1 1 | grep "Average" | tail -1 | sed 's/ \+/ /g' | cut -d " " -f 11 | tr -d"\n"`;
usage=`echo "scale=0;(100-$idle)/10" |bc`;
# BACKUP PREVIOUS DATA #
# CUT THE OLDEST LINE #
cat cpu.log | tail -$columns >> temp.tmp
# UPDATE STATS #
if [[ $usage -eq 0 ]];
then
# IF USAGE LESS THEN 20% DRAW SINGLE BAR #
echo "1" >> temp.tmp
else
echo $usage >> temp.tmp
fi
# UPDATE LOG #
cat temp.tmp > cpu.log
rm temp.tmp
# DRAW GRAPH #
var=6;
# BEGIN FROM COLUMN 1 #
j=1
while read usage
do
# DRAW USAGE #
for i in `seq 1 $usage`
do
top=`echo "11-$usage" | bc`
var=`echo "11-$i" | bc`
if [[ $usage -gt 3 ]]; then
if [[ $usage -gt 6 ]]; then
if [[ $var -eq $top ]];then
draw $var $j "1" "+"
else
draw $var $j "1" "|"
fi
else
if [[ $var -eq $top ]];then
draw $var $j "3" "+"
else
draw $var $j "3" "|"
fi
fi
else
if [[ $var -eq $top ]]; then
draw $var $j "2" "+"
else
draw $var $j "2" "|"
fi
fi
done
# WIPE PREVIOUS BAR REMAINNING IF THEY EXIST #
usage=`echo "$usage+1" | bc`
for k in `seq $usage 11`;
do
var=`echo "11-$k" | bc`
wipe $var $j
done
# PROCEED TO NEXT COLUMN #
j=`echo "$j+1" | bc`
# ADD LATENCY IF NEEDED #
sleep 0.1
done < "cpu.log"
tput cup 11 0
#
done
