Crash Downloading Spikes from Board

[Chris Huyck]

I have a system that runs on my 48 chip spinnaker board.  It used to work in an old version of the spinnaker software, but now it crashes trying to download spikes.

 

I have about 5000 neurons, and it works (at least partially) if I run it for 20s in 1ms timesteps.  If I run it for 30s, it crashes.  (It partially works because I only download some of the spikes.  I haven’t tested on the full set.) 

 

It seems to run for a bit (8.667s), then pause, then run a bit more.  I don’t think it did that with the old software, but is fine for my purposes. 

 

I’ve tried to not record a reasonably large subset of the neurons (~3000), but that doesn’t seem to affect it. 

 

Does anyone have an idea about what to do?

-Chris

[Andrew Rowley]

Hi,

Do you have more details of the crash i.e. the error message / stack trace produced?

The run / pause behaviour is that it is working out how much space is available for recording, and then it runs for the time that will fill that space, pauses and extracts data, clears the recording memory and then continues, reusing the cleared space for the next chunk of recording.  I think the behaviour has been around for a while, but it may have been somewhat less reliable in older versions in that it may have miscalculated the time it could run for.  That said, if it wasn't crashing, that sounds like a new bug has now been introduced!

If you have the error, I can start to look at what might be going wrong...

Andrew :)

---

From: 'Chris Huyck' via SpiNNaker Users Group <spinnak...@googlegroups.com>
Sent: 18 September 2025 10:26
To: spinnak...@googlegroups.com <spinnak...@googlegroups.com>
Subject: [SpiNNaker Mailing List] Crash Downloading Spikes from Board

 

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