Re: Diagnosing and overcoming GigE camera freezes

["Henrique F. Simoes via Tech-talk" <tech-talk at aps.anl.gov>]

On Monday, May 26, 2025 3:44 AM, Abdalla Ahmad <Abdalla.Ahmad at sesame.org.jo> wrote:
> I would like to share our experience with Basler GigE cameras
> (acA1300). We use them to visualize the beam from the injector to the
> storage-ring, we use them at some beamlines but controlled via Pylon
> Viewer. Right now, they are controlled with ADPylon. The issue was
> there was a lot of disconnection with the cameras, it was a network
> setup issue:
> * Jumbo frames were enabled (especially on intermediate switches)

That's a bit surprising for me. I've seen jumbo frames help the IOC keep
up with the high input traffic on a modest machine, but I've never
considered that it could cause occasional disconnections.

Our intermediate switches do have them enabled, while most IOC hosts
don't.

> * A certain camera was moved to newer network switch for testing.
>
> Right now, on this camera, we can achieve between 1.5M and 2M frames
> continuously at 10 Hz frame rate with much less disconnection.

Have you ever disabled jumbo frames on the intermediate switches in the
first setup, and validated that this was the only difference in both
scenarios?

> We used the ace2 model for some period and it used to freeze due to
> overheating, we removed the camera so we never got the chance to
> troubleshoot.

Do you recall what temperature approximately the camera would reach
before freezing?

> Best Regards,
> Abdalla Al-Dalleh
> Control Engineer
> SESAME

Thanks for sharing your experiences, Abdalla!

--
Henrique F. Simões
Control Software Group (SwC)
Brazilian Synchrotron Light Laboratory (LNLS)
Brazilian Center for Research in Energy and Materials (CNPEM)

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