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Reports until 18:33, Monday 22 October 2012
H2 CDS
david.barker@LIGO.ORG - posted 18:33, Monday 22 October 2012 (4499)
H2 ETMY SUS work, RFM problems encountered

New user models were installed on h2susb6 and h2seib6. Part of the change was additional RFM IPC  (sending and receiving) on SUS TMSY, ETMY and ISI ETMY. 

It was found that each RFM IPC receiver added roughly 3-4uS on the cpu time of the model. This caused ETMY to max out at 59-60uS when TMSY was not running. But when TMSY model was started and reading the same RFM channels, then ETMY cpu went very high to 67-70uS. It looks like a race condition between the TMSY and ETMY models trying to access the same resources at the exactly the same time. We need to talk to Rolf and Alex, and replicate the problem on the DAQ test stand before proceding. We also need to see if this problem will occur on the Dolphin network.

For tonight Jeff has removed some of the additional IPC receivers to get the cpu usage down to safe levels.

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