[Bloat] AQM and PPP on Linux

[Alan Jenkins]

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