J. Kissel

Another data point on the issue of IPC timing causing errors between the LSC model and QUAD models -- Stuart and I added 1 (one) RFM IPC sender to the LSC and 1 (one) RFM PC receiver to each of the ETM models for DARM-sensed, violin mode damping on Tuesday morning (see LHO aLOG 14657). This appears to have increased the ETM model's CPU_METER by ~1 [us], and made no change to the random-time computation time jumps up by as much as ~5-6 [us]. Surprisingly, it *decreased* the LSC model's average compute time by ~ 1 [us], but again also did not affect the timing jumps as high as an extra 7-9 [us].

I attach a 7 day, minute trend. The only discrete jump in the trend is when the models were restarted around 2014-10-28 14:15 UTC (or Tuesday 2014-10-28 07:15 PDT).