adding scripts to generate gnuplots from iperf3 data
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contrib/README.txt
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contrib/README.txt
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This directory contains files that might be useful to analyze iperf3 results
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iperf3_to_gnuplot.py: converts iperf3 JSON output to format easy to plot in gnuplot
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iperf3.gp: sample gnuplot commands to plot throught and retransmits
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contrib/iperf3.gp
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contrib/iperf3.gp
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#
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# sample Gnuplot command file for iperf3 results
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set term x11
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#set term png
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#set term postscript landscape color
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set key width -12
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# iperf3 data fields
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#start bytes bits_per_second retransmits snd_cwnd
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set output "iperf3.png"
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#set output "iperf3.eps"
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#set nokey
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set grid xtics
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set grid ytics
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set grid linewidth 1
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set title "TCP performance: 40G to 10G host"
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set xlabel "time (seconds)"
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set ylabel "Bandwidth (Gbits/second)"
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set xrange [0:60]
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set yrange [0:15]
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set ytics nomirror
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set y2tics
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set y2range [0:2500]
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# dont plot when retransmits = 0
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set datafile missing '0'
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set pointsize 1.6
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plot "40Gto10G.old.dat" using 1:3 title '3.10 kernel' with linespoints lw 3 pt 5, \
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"40Gto10G.new.dat" using 1:3 title '4.2 kernel' with linespoints lw 3 pt 7, \
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"40Gto10G.old.dat" using 1:4 title 'retransmits' with points pt 7 axes x1y2
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#plot "iperf3.old.dat" using 1:3 title '3.10 kernel' with linespoints lw 3 pt 5, \
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# "iperf3.new.dat" using 1:3 title '4.2 kernel' with linespoints lw 3 pt 7
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contrib/iperf3_to_gnuplot.py
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contrib/iperf3_to_gnuplot.py
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#!/usr/bin/env python
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"""
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Extract iperf data from json blob and format for gnuplot.
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"""
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import json
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import os
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import sys
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import os.path
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from optparse import OptionParser
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import pprint
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# for debugging, so output to stderr to keep verbose
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# output out of any redirected stdout.
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pp = pprint.PrettyPrinter(indent=4, stream=sys.stderr)
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def generate_output(iperf, options):
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for i in iperf.get('intervals'):
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for ii in i.get('streams'):
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if options.verbose: pp.pprint(ii)
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row = '{0} {1} {2} {3} {4}\n'.format(
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round(float(ii.get('start')), 4),
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ii.get('bytes'),
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# to Gbits/sec
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round(float(ii.get('bits_per_second')) / (1000*1000*1000), 3),
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ii.get('retransmits'),
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round(float(ii.get('snd_cwnd')) / (1000*1000), 2)
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)
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yield row
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def main():
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usage = '%prog [ -f FILE | -o OUT | -v ]'
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parser = OptionParser(usage=usage)
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parser.add_option('-f', '--file', metavar='FILE',
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type='string', dest='filename',
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help='Input filename.')
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parser.add_option('-o', '--output', metavar='OUT',
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type='string', dest='output',
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help='Optional file to append output to.')
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parser.add_option('-v', '--verbose',
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dest='verbose', action='store_true', default=False,
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help='Verbose debug output to stderr.')
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options, args = parser.parse_args()
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if not options.filename:
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parser.error('Filename is required.')
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file_path = os.path.normpath(options.filename)
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if not os.path.exists(file_path):
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parser.error('{f} does not exist'.format(f=file_path))
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with open(file_path,'r') as fh:
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data = fh.read()
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try:
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iperf = json.loads(data)
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except Exception as e:
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parser.error('Could not parse JSON from file (ex): {0}'.format(str(e)))
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if options.output:
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absp = os.path.abspath(options.output)
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d,f = os.path.split(absp)
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if not os.path.exists(d):
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parser.error('Output file directory path {0} does not exist'.format(d))
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fh = open(absp, 'a')
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else:
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fh = sys.stdout
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for i in generate_output(iperf, options):
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fh.write(i)
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if __name__ == '__main__':
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main()
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