Re: [sumo-user] fcd-output: speed issue

[Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx>]

Hello,

the latest development version of sumo supports additional options for restricting the set of vehicles which generate fcd output as well as reducing the output period. (http://sumo.dlr.de/wiki/Simulation/Output/FCDOutput#Instantiating_within_the_Simulation)

regards,

Jakob

2018-03-21 9:59 GMT+01:00 Thuresson, Daniel <daniel.thuresson.2@xxxxxxxxxxxxx>:

Hi,

I'm running win7 and python 2.7.14 and SUMO 0.30.0. I will try to investigate if firewall/virus scanner issue. /

-----Original Message-----
From: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@eclipse.org] On Behalf Of Michael Behrisch
Sent: den 16 mars 2018 21:21
To: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Subject: Re: [sumo-user] fcd-output: speed issue

Hi Daniel,
I could not reproduce it. I did a small test generating an fcd file of about 350MB resulting in a gpsdat file of about 18MB. Both runs took about two minutes on my PC (Windows 7 with Python 2.7.11). What is your platform? There may be some interferring virus scanner or firewall watching your sockets.

Best regards,
Michael

Am 16.03.2018 um 10:14 schrieb Jakob Erdmann:
> Hello,
> i haven't personally used this method of operation so I have no data
> to compare too. However, your finding does not surprise me insofar as
> sumo still generates the full amount of xml output. Most likely the
> socket buffering parameters are not optimized for speed as they are
> for writing to disk. I'm forwarding this to my colleague who may be
> able to help with setting the correct parameters.
>
> regards,
> Jakob
>
> 2018-03-16 8:23 GMT+01:00 Thuresson, Daniel
> <daniel.thuresson.2@volvocars.com
> <mailto:daniel.thuresson.2@volvocars.com>>:
>
>     Hi,____
>
>     __ __
>
>     I tried to use the fcd-output and write data to a port. The reason
>     for this is to avoid large files, which I have assumed slows down
>     the computation.____
>
>     __ __
>
>     I do this by first starting python in a command prompt:____
>
>     c:\temp\SUMO_RESULTS_automized\Simulations>python traceExporter.py
>     –fcd-input 43214 --delta-t 1 --begin 3000 --gpsdat-output
> test.txt____
>
>     __ __
>
>     Then I start SUMO with:____
>
>     SumoVersion --time-to-teleport 80 --fcd-output localhost:43214
>     --step-length 0.1 -b 0 -e 4501 -n netPath -r PHEMrouPath -a addPath
>     --start --quit-on-end &____
>
>     __ __
>
>     My problem with this is that the simulation runs significantly
>     slower than when running without fcd-output and creating a very
>     large file. ____
>
>     Have I done something wrong? ____
>
>     __ __
>
>     Rgds /Daniel____
>
>
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