Reports until 14:44, Monday 13 April 2015
H1 CDS
david.barker@LIGO.ORG - posted 14:44, Monday 13 April 2015 (17846)
ASC RFM IPC Errors

Rolf, Jim, Dave:

after removing the LSC RFM receive errors completely last week, I noticed that the ASC is getting receive errors from the ALS models at the end stations at a very low rate.

The rate of error is one every 8 to 10 hours. The return of the errors can be tracked back to the ALS model changes made last Tuesday 07apr2015 during maintenance. A trend of the ALS CPU usage shows a difference in signature (attached plot shows last 2 weeks of trends) starting last tuesday.

To remind everyone, when the end station ISC was split, the ALS is the "slow" component, so RFM errors would not be entirely unexpected from this sender.

Images attached to this report