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Some interesting suggestions on latency improvement here:
dantalion.nl/2024/09/29/linuxcnc-latency...arameter-tuning.html

But don't get too obsessed with it.
50k jitter is fine with a Mesa card. Though I would be a bit unhappy with 250k.
Try running the latency test without a base thread, you won't need one with a Mesa card.

The download links will all work if you take out the "s" in "https://..."
There is a problem with the wiki certificate. We keep trying to fix it, but without much luck.

When we had a similar problem with stringy chips, drilling holes with carbide drill with trough coolant in CrMo4, a modified G83 cycle solved that. Only retracting by 0.2mm after 2mm. Continue this 2.2mm / retract 0.2mm  steps until 
final depth, we made all the 120 holes without interruption and big loss of time. I think feed was about 0.12/rev

Can you describe what you want to happen? I have a feeling that the AI might be over-complicatiing things. But without knowing your requirements it is hard to tell.

Does the MPG connect to a Mesa counter, or only to GPIO?