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Re: [sumo-user] Can not figure out timing for different traci function
Thank you.

On Tue, Feb 2, 2021 at 5:33 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:

Am Di., 2. Feb. 2021 um 00:49 Uhr schrieb . Abdullah <ab11@xxxxxxxxxxx>:
Thank you for the explanation. If the simulation step-length doesn't determine the simulation speed, then what is it used for? What is the purpose of the step-length and how happens during 1 traci.simulationStep()?

On Mon, Feb 1, 2021 at 12:21 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
If you need to start a fresh simulation, you can use traci.load([ ])  which reloads the network and also allows to set all simulation options.
getDeltaT is not suited for measing simulation speed. It simply returns the step-length that was set via options.
To measure execution speed you could take the average wall-clock time over multiple calls to traci.simulationStep.

regards,
Jakob

Am So., 31. Jan. 2021 um 20:14 Uhr schrieb . Abdullah <ab11@xxxxxxxxxxx>:
Hi,

thank you for the answer. Looking at traci.simulation.loadState, it only takes a filename, is there a way to specify these options (["--step-length", "0.5", '--save-state.rng', "--step-method.ballistic", "--no-step-log", "--no-warnings"], port=port) like I can for traci.start

Also, when I measure the time across traci.simulation.getDeltaT(), it takes from 0 to 0.001 seconds rather than 0.5 seconds. So, I am a bit confused about how long it actually takes for sumo to perform one simulation step?

On Sun, Jan 31, 2021 at 5:44 AM Jakob Erdmann <namdre.sumo@xxxxxxxxx> wrote:
Hello,
the delay most likely comes from loading the network and setting up all the necessary simulation objects in memory.
If you need to start a simulation repeatedly, you can avoid the overhead of network loading by calling traci.simulation.saveState and traci.simulation.loadState

regards,
Jakob

Am Sa., 30. Jan. 2021 um 23:15 Uhr schrieb . Abdullah <ab11@xxxxxxxxxxx>:
Hi all,

I have two codes below. In traci_demo_v1, I have a loop that just starts and closes a simulation and prints the time taken to do so. In windows, it takes around 0.5 secs but when I check my task manager (Memory Usage.PNG file attached below) I see only some memory use of 35MB and no disk usage. So I was wondering why it takes so long to start or load a state (without gui)? Is there any way to reduce this time? Also, in traci_demo_v2 I have a simulation that runs for sometime with step-length 0.5. But when I measure the time across traci.simulation.getDeltaT(), it takes from 0 to 0.001 seconds rather than 0.5 seconds. So, I am a bit confused about how long it actually takes for sumo to perform one simulation step?

I am using SUMO v1.7.


--
Thank you.
Abdullah
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--
Thank you.
Abdullah
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--
Thank you.
Abdullah
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--
Thank you.
Abdullah

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