qperf-plot

Parse qperf reports, plot bandwidth and latency diagrams.

Dependencies

• python
• gunplot above 5.0

How to use it

First prepare 2 qperf reports

For example:

# suppose qperf (server mode) is running on NODE1 and NODE2
qperf $NODE1 -oo msg_size:64:64K:*2 -vu -vvc tcp_bw tcp_lat > test1.raw
qperf $NODE2 -oo msg_size:64:64K:*2 -vu -vvc tcp_bw tcp_lat > test2.raw

The content of test*.raw looks like:

tcp_bw:
    bw        =  76.6 MB/sec
    msg_size  =    64 bytes
tcp_bw:
    bw        =  70.1 MB/sec
    msg_size  =   128 bytes
...
tcp_lat:
    latency   =  663 us
    msg_size  =   32 KiB (32,768)
tcp_lat:
    latency   =  1.1 ms
    msg_size  =   64 KiB (65,536)

Parse qperf raw reports into gnuplot data files

cat test1.raw | ./qperf-parse.py > test1
cat test2.raw | ./qperf-parse.py > test2

The content of data file test* looks like:

# msgsize(Bytes) bw(MB/sec) lat(us)
64 76.6 183
128 70.1 178
256 87.0 171
512 107.0 190
1024 85.6 211
2048 84.5 225
4096 76.1 269
8192 90.5 317
16384 83.6 452
32768 81.0 663
65536 92.9 1100

If you want to parse a batch of raw report files (suppose they have same file extension), try below script:

for line in `find . -maxdepth 1 -name "*.raw" -print`
do
   f=$(basename $line .raw)
   cat $line | ./qperf-parse.py > $f
done

If you have the average of multiple generated data files(by qperf-parse.py), suppose they have same prefix name "vxlan" with different index in filename:

ls vxlan-[0-9] | xargs ./average.py >vxlan

The average data will be written into file "vxlan".

Generate diagrams by gnuplot

gnuplot -c qperf-plot.plt test1 test2

Tow png file will be generated:

• bw.png Bandwidth comparasion diagram between 2 tests
• lat.png Latency comparasion diagram between 2 tests

bw.png:

lat.png:

Contribution

It simply works but I hope it to be more powerful in future.

Issues and Pull-Requests are welcome.