On 28/07/15 21:10, Alan Jenkins wrote:
On 28/07/15 20:24, Juliusz Chroboczek wrote:
I would be very interested in flent benchmarks of your 3g device with
the 3 packet txqueue and with fq_codel, for the tcp_upload, rrul, and
rrul_be tests.
Please send me detailed instructions, as well as information about how
much traffic I'm going to have to pay for.
FWIW, the RTT of the (unloaded) link varies tremendously. Right now
(around 21:20), I'm seeing 89ms to 823ms, with an average of 192ms and
a standard deviation of 146ms. It's better at night, mid-morning it's
pretty much unusable.
-- Juliusz
It's a straightforward usage. My one concern would be ensuring you
have netperf (netperf.org) built as required.
I suggest building netperf from source. (Cite: flent requirements[1],
and experience of failures with the Debian package)
./configure --enable-demo=yes --enable-histogram
make
sudo make install
Untested (on my part) but documented[2] install is by debs at
https://software.opensuse.org/download.html?project=home:tohojo:flent&package=flent
or "pip install flent".
flent defaults to a 60 second test (and will run at whatever 4x tcp
streams can manage). Given the variation & high rtt I wouldn't want
to shorten that very much. One available graph from the output file
will be what I assume Dave means when he says "mountain plot". That
is, bandwidth & latency v.s. time.
Assuming EU (server taken from
https://github.com/richb-hanover/CeroWrtScripts):
flent -H netperf-eu.bufferbloat.net rrul -t
my-little-3G-connection-on-fq_codel
rrul is the test. The -t value provides a caption. Move the output
file it mentions from /tmp (huh?) to somewhere more useful. View
available graphs with flent --gui <file>.
* flent-gui may have additional dependencies which may or may not be
findable, sorry
python-matplotlib
python-matplotlib-qt4 or maybe python-matplotlib-qt5
otherwise try
flent -i <result file> -p <plot> -o out.svg
where plot is in e.g. `flent --list-plots rrul`
The plot over time is "all_scaled".
Alan
[1]
http://netoptimizer.blogspot.co.uk/2014/09/mini-tutorial-for-netperf-wrapper-setup.html
[2] https://github.com/tohojo/flent/blob/master/README.rst
additional ref, including using your own server for netperf instead:
https://flent.org/intro.html#quick-start
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