Say that you want to get a plot against XEN guests activity, from a XEN host.
cd /data/guests/ xl create load1/load1 xl create load2/load2 xl create load3/load3
Three seconds is the default delay for xentop to deliver the metrics. And we usually get rid of the first metric, either because the percentage is zero or because we need to substract the overall count from the previous iteration. So during one minute,
mkdir -p /var/tmp/xentop/ cd /var/tmp/xentop/ rm -f xentop* (( time = 0 )); until (( time >= 60 )); do (( time++ )); echo -n "$time "; sleep 1; done & xentop -f -b -i$(( 60 / 3 + 1 )) > xentop unset time
to help your stress the guest in due time,
stress --help date nice stress --cpu 16
Grab each guest’s metrics in a separate file,
for guest in load1 load2 load3; do
egrep "^[[:space:]]*$guest " xentop > xentop.$guest
wc -l xentop.$guest
done; unset guest
Taking CPU(sec), not CPU(%), we need to substract the values from the previous iteration,
vi convertcpu
#!/bin/ksh
[[ -z $1 ]] && print what guest? && exit 1
guest=$1
(( sec = 0 ))
for time in `awk '{print $3}' xentop.$guest`; do
(( diff = time - timeold ))
print "$sec\t$diff"
(( sec = sec +3 ))
timeold=$time
done; unset cputime
chmod +x convertcpu
As a result you get the time on the first col, and CPU(sec) on the second col.
for guest in load1 load2 load3; do
./convertcpu $guest | sed 1d > table.$guest
done; unset guest
Note. we are removing the first line from those tables, as its diff would not make any sense.
#apt install gnome-themes-standard #gnome-themes-extra vi script.gp set term png set output "output.png" set title "load1,2,3 vcpu usage" set xlabel "60 seconds" set ylabel "vcpu times" set xrange [0:60] set yrange [0:35] set multiplot set key at 60,35 plot "table.load1" title "load1" smooth csplines lt 1 set key at 60,34 plot "table.load2" title "load2" smooth csplines lt 2 set key at 60,33 plot "table.load3" title "load3" smooth csplines lt 3 gnuplot -c script.gp
Other useful commands,
reset replot
Other nice terminals,
#set term pdf mono #set output "output.pdf"
Check for avaiable terminals,
set term
Plotting Data with gnuplot https://www.cs.hmc.edu/~vrable/gnuplot/using-gnuplot.html
GNUPLOT 4.2 - A Brief Manual and Tutorial https://web.archive.org/web/20190616032406/https://people.duke.edu/~hpgavin/gnuplot.html
Output terminals http://www.gnuplotting.org/output-terminals/
gnuplot plotting multiple line graphs https://stackoverflow.com/questions/10792015/gnuplot-plotting-multiple-line-graphs
How to output smooth cspline curve as a data file https://stackoverflow.com/questions/30474631/how-to-output-smooth-cspline-curve-as-a-data-file
Library – Gnuplot Examples http://www2.yukawa.kyoto-u.ac.jp/~akira.ohnishi/Lib/gnuplot.html
gnuplot Frequency Plot http://psy.swansea.ac.uk/staff/carter/gnuplot/gnuplot_frequency.htm
Gnuplot line types https://stackoverflow.com/questions/19412382/gnuplot-line-types
gnuplot demo script: lines_arrows.dem http://gnuplot.sourceforge.net/demo/lines_arrows.html
Linetypes, colors, and styles http://www.bersch.net/gnuplot-doc/linetypes,-colors,-and-styles.html
Gnuplot Line Styles for Display and Printing https://jblevins.org/log/lines
15 Linetype, colors, and styles http://www.gnuplot.info/docs_4.2/gnuplot.html#x1-6200015 http://gnuplot.sourceforge.net/docs_4.2/node62.html
linestyle http://www.gnuplotting.org/tag/linestyle/
Multiple lines with different colors http://www.gnuplotting.org/multiple-lines-with-different-colors/
Gnuplotting http://www.gnuplotting.org/
Library – Gnuplot Examples https://www2.yukawa.kyoto-u.ac.jp/~akira.ohnishi/Lib/gnuplot.html
1.17.2 linestyles vs linetypes http://soc.if.usp.br/manual/gnuplot-doc/htmldocs/linestyles_005fvs_005flinetypes.html
How to plot a bar graph on Gnuplot http://ask.xmodulo.com/plot-bar-graph-gnuplot.html