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• XPM Link issues 2024/04/10-2024/04/11:
  • Around 14:00-14:10 on 2024/04/10, RIX Grafana page shows there were fairly global XPM issues (measured by XPM RxDspErrs  rates)
  • XPM5 link (XPM3-5) goes down around 14:07 on 2024/04/10
  • Other XPMs recover but 5 does not, and the link stays down.
  • xpmpva shows XPM5 looks mostly healthy except for the RxLinkUp 
  • Required TxLinkReset  to restore RxLinkUp  (on 2024/04/11 ~09:15). An earlier attempt on 2024/04/10 in the afternoon did not appear to have resolved the issue.
  • 

Summary Of Testing

These are the results of the tests that have been conducted in the FEE alcove to determine if the XPM glitch can be reproduced.
Every test is run from a starting behavior where the DAQ can allocate, configure, run, and disable.
Whenever the DAQ does not follow the starting behavior remedies are applied to recover it.

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