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|
#!/bin/bash
#
# Simple bash script for parsing and evaluating a CSV file
# (C) 2006 Jan Altenberg <tb10alj@tglx.de>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License Version
# 2 as published by the Free Software Foundation.
GNUPLOT=`which gnuplot`
split_values ()
{
if [ "$2" = "save_old_state" ]
then
OLD_TIME=$TIME
OLD_CH1=$CH1
OLD_CH2=$CH2
TIME=`echo $1 | cut -f1 -d,`
CH1=`echo $1 | cut -f2 -d,`
CH2=`echo $1 | cut -f3 -d,`
else
TIME=`echo $1 | cut -f1 -d,`
CH1=`echo $1 | cut -f2 -d,`
CH2=`echo $1 | cut -f3 -d,`
fi
}
# We need to convert the TIME value in a format which is readable by bc ;-(
# 1e-04 -> 1 / (10^4)
# 1e+04 -> 1 * (10^4)
convert_time_value ()
{
VALUE=`echo $1 | sed 's/e-\(.*\)$/\/(10\^\1)/g' | sed 's/e+\(.*\)$/*(10^\1)/'`
echo $VALUE
}
print_help ()
{
echo "Usage: $0 -f CSV-file -p PLOT-file"
echo " -f CSV-file (where your data is stored)"
echo " -p PLOT-file (where the plot image will be stored)"
}
# Parsing command line options
while getopts "f:p:v" OPTION
do
case $OPTION in
f ) FILE=$OPTARG;;
p ) PLOT_FILE=$OPTARG;;
v ) VERBOSE="ON";;
* ) print_help; exit 1;;
esac
done
if [ ! "$FILE" ]
then
print_help
exit 1
fi
if [ ! -e $FILE ]
then
echo "Input file does not exist!"
exit 1
fi
if [ ! "$PLOT_FILE" ]
then
print_help
exit 1
fi
if [ ! "$GNUPLOT" ]
then
echo "Please install gnuplot ! !"
exit 1
fi
TMPFILE=/tmp/latencies_$$
RESULT_TMPFILE=/tmp/latencies_results_$$
echo "Parsing CSV file..."
echo " Removing table head..."
cat $FILE | sed '/.*TIME.*/d' > $TMPFILE
echo " Seperating values..."
for LINE in $(cat $TMPFILE)
do
if [ ! "$TIME_START" ]
then
if [ ! "$TIME" ]
then
split_values $LINE
continue
else
split_values $LINE "save_old_state"
if [ "`echo "scale=2; $CH1 - $OLD_CH1" | bc`" != "0" ]
then
TIME_START=`convert_time_value $TIME`
TIME=""
else
continue
fi
fi
else
split_values $LINE "save_old_state"
if [ "`echo "scale=2; $CH2 - $OLD_CH2" | bc`" != "0" ]
then
TIME_END=`convert_time_value $TIME`
[ "$VERBOSE" = "ON" ] && echo " Found latency -> $TIME_END - $TIME_START"
echo "scale=10; ($TIME_END - $TIME_START)" | bc | sed 's/^\./0\./' >> $RESULT_TMPFILE
TIME_START=""
TIME_END=""
TIME=""
else
continue
fi
fi
done
echo "Generating plot..."
cat $RESULT_TMPFILE | sort -n | uniq -c | sed 's/^ *//' | sed s'/0*$//'> $TMPFILE
cp $TMPFILE $RESULT_TMPFILE
XMAX=`cat $RESULT_TMPFILE | cut -f2 -d' ' | sort -rn | head -n1`
YMAX=`cat $RESULT_TMPFILE | cut -f1 -d' ' | sort -rn | uniq | head -n1`
XRANGE=`expr "$XMAX * 2"`
YRANGE=`expr "$YMAX * 2"`
echo " XMAX $XMAX"
echo " YMAX $YMAX"
echo -e "set title \"Latency test\"\n\
set terminal pbm color\n\
set xrange [0:$XRANGE]\n\
set yrange [0:$YRANGE]\n\
set ylabel\"n\"\n\
set style fill solid 0.250000 border\n\
set output \"$PLOT_FILE\"
plot \"$RESULT_TMPFILE\" using 2:1 \"%lf%lf\" notitle with boxes" | gnuplot -persist
display $PLOT_FILE
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