[Battlemesh] Tests

Dave Taht dave.taht at gmail.com
Sat May 3 19:22:13 CEST 2014

A couple more comments:

In scenario 3s and 5 it is unclear if what babel calls "diversity
routing" (and batman calls
something else that I can't remember) will be used.


My assumption is that a single wifi channel will be used. Using
multiple channels is
generally a huge win, but would need more routers (as in scenaro 5) to
achieve interesting effects.

If it is the first case, the diagram on 3 is incorrect for a 5m
radius, as all routers would
have direct reachability unless they are on different ssids.

If it is the second case, n7 would have to support 6 channels, and the
others, 3.

On Sat, May 3, 2014 at 9:45 AM, Dave Taht <dave.taht at gmail.com> wrote:
> On Sat, May 3, 2014 at 7:34 AM, Amadeus Alfa
> <amadeus at chemnitz.freifunk.net> wrote:
>> Hello all,
>> BattleMesh v7 tests are now available online:
>> http://battlemesh.org/BattleMeshV7/Tests
>> Please let us know if you have any comments and what firmware requirements
>> are necessary.
> the netperf-wrapper test can be somewhat easily used in scenarios 2
> and 5. Requirements
> are a netperf netserver compiled with --enable-demo on the server(s),
> and python on the
> clients. (only plotting requires py-qt4 and python-matplotlib)
> To tackle 5 in a topology like this:
> client1 -> server1
>           -> server2
> client1 $: netperf-wrapper -l 300 -H server1 -H server2 -H server1 -H
> server2 rtt_fair_be
> To test
> client1 -> server1
> client2 -> server2
> client1 $: ssh client2 'netperf-wrapper -l 300 -H server1 -H server2
> -H server1 -H server2 -t client2-babel rtt_fair_be' &
> client2 $: netperf-wrapper -l 300 -H server1 -H server2 -H server1 -H
> server2 -t client1-babel rtt_fair_be
> To meet the spec more exactly, to do a simpler single stream tcp
> upload or tcp download test rather than 2 flows
> to/from each server as these do, use "tcp_upload" or "tcp_download" as
> the test name, and only a single -H target.
> Writing other tests is rather straightforward also. The most often
> used test is rrul_be actually.
> To exercise the wifi hardware queues, "rtt_fair" will test the BE and BK queues.
> (the -t title option above distinguishes between test runs). There is
> also a batching facility that can be used to
> capture a lot more data about the local structure of the qdisc and
> network, and completely automate a test series.
> In all cases latency and loss are fairly closely measured, and the end
> results can be easily combined together
> on a variety of cdf, box, q-q or other plots. There are simply
> extraordinary numbers of graphs and data available
> in the netperf-wrappers format now...
> As for scenario 2 (powerline), I would argue for more different
> manufacturers hardware as the two papers I know
> of on it give wildly varying and oft-terrible results, and I'd be
> reluctant to draw conclusions from only one manufacturer.
> http://caia.swin.edu.au/reports/130121A/CAIA-TR-130121A.pdf
> http://caia.swin.edu.au/reports/130417A/CAIA-TR-130417A.pdf
> Does anyone have any MOCA gear yet?
> I have a few comments the structure of the tests.
> 0) Given the quality of analysis we're getting back from
> netperf-wrappers, I'd like that, rather than (or in addition to) iperf
> be used. Get it at: https://github.com/tohojo/netperf-wrapper
> 1) A single long unidirectional tcp flow is not how the internet works & neither
> test specifies the direction of the traffic. A single tcp stream is
> not particularly
> revealing, and various events (RTOs, reorders etc) are not easily
> recovered from. A
> a simultaneous continuous ping measurement gives a better idea of what's going
> wrong on the path, in addition to the transfer.
> A string of chrome web page benchmarker runs might be useful to obtain, in order
> to generate more realistic network traffic from a list of urls.
> 2) 20 minutes is a heck of a long time to run a test. It should be
> good to detect
> long period oscillations like the babel-rtt work showed, however. (I used -l 300
> above as that's 5 minutes)
> 3) The client nor server driving the test is not specified. My
> assumption is that
> each would be a reasonably fast box connected via ethernet to the
> routers, running
> a given kernel version, with a specific tcp (cubic) used, with an
> underlying qdisc
> of pfifo_fast (or sch_fq if the kernel is recent enough). Changing the tcp might
> be useful as well as a separate experiment....
> As for scenario 3, while I agree it's a good measurement of baseline
> load induced by the routing protocol,
> it's not a measure of what happens with route updates when routes
> change, due to load, interference or other factors.
> While it involves a lot of exercise, I was bemused by the testing
> method outlined in this paper, so
> perhaps there could be a node mobility test of some sort?
> http://snapon.lab.bufferbloat.net/~d/weakening_mac_loss_recovery.pdf
> "The experiment is performed in a two storied Japanese style house
> built of wood. As depicted in Fig. 2, the server and AP are located in
> the 2nd floor. The terminal moves between the far position in the 1st
> floor and the near position in the 2nd floor. The distance between the
> terminal and AP is about 1.2 meter for the near position and about 10
> meter for the far position. During a test run for 120 seconds, the
> terminal moves in the following way.
> * It starts communication at the far point and keeps the position for
> 30 seconds.
> * Then, it moves from the far position to the near position. The
> duration spent for the moving is about 15 seconds.
> * It communicates with the server at the near position for 30 seconds.
> * Again, it moves from the near position to the far position spending
> about 15 seconds.
> * In the last part, the terminal keeps the communication for 30
> seconds at the far position. "
> (my daydream is that the mobility is done by a robot, but...)
>> @Eloi I have adopted 2 tests that should be of interest. :-)
>> Best wishes, Amadeus
>> ---- Original Message ----
>> From: Eloi Carbó Solé <eloicaso at gmail.com>
>> To: "Battle of the Mesh Mailing List" <battlemesh at ml.ninux.org>
>> Sent: Mi, Apr 30, 2014, 6:05 PM
>> Subject: Re: [Battlemesh] Tests
>> Hi!
>> I am doing my final degree thesis wibed[0] that will be presented by Pau[1]
>> and I am adopting the WBMv6 tests in order to check the mesh network
>> behaviour. One of the main points of this thesis will be to validate the
>> network, testing and monitoring its behaviour applying these tests. My idea
>> is also to adopt and use WBMv7 tests too, so I am really interested in being
>> in touch with those persons who will discuss and perform the experiments and
>> tests.
>> Best regards,
>> [0] https://wiki.confine-project.eu/wibed:start
>> [1] http://battlemesh.org/BattleMeshV7/Agenda
>> On Tue, Apr 29, 2014 at 8:17 PM, Amadeus Alfa
>> <amadeus at chemnitz.freifunk.net> wrote:
>>> Hi Colleen,
>>> thank you for taking care of testing ;-) The test scenarios and planning
>>> will be available for review by the end of this week (will send PDF files to
>>> the list). I would love to see your idea of tapping 802.11s in one of the
>>> tests - could you please provide some more information so that I can create
>>> a short description out of it?
>>> Also, we are still looking for testing supporters since there is only one
>>> person right now trying to coordinate tasks.
>>> Best wishes, Amadeus
>>> >---- Original Message ----
>>> >From: Colleen T <colleen at cozybit.com>
>>> >To: battlemesh at ml.ninux.org
>>> >Sent: Di, Apr 29, 2014, 9:33 PM
>>> >Subject: [Battlemesh] Tests
>>> >
>>> >Hello everyone,
>>> >
>>> >I am looking forward to coming.  I have been looking at the
>>> >Battlemesh6 test page.  Will the tests be very similar this year?  Do
>>> >we run them over the course of the week?
>>> >
>>> >I will be bringing some TPLink mr3020's -- not sure how many yet --
>>> >and testing open80211s =)
>>> >
>>> >Cheers,
>>> >Colleen
>>> >_______________________________________________
>>> >Battlemesh mailing list
>>> >Battlemesh at ml.ninux.org
>>> >http://ml.ninux.org/mailman/listinfo/battlemesh
>>> _______________________________________________
>>> Battlemesh mailing list
>>> Battlemesh at ml.ninux.org
>>> http://ml.ninux.org/mailman/listinfo/battlemesh
>> --
>> Eloi Carbó Solé.
>> _______________________________________________
>> Battlemesh mailing list
>> Battlemesh at ml.ninux.org
>> http://ml.ninux.org/mailman/listinfo/battlemesh
> --
> Dave Täht
> NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article

Dave Täht

NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article

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