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Reports until 16:32, Wednesday 07 September 2016
H1 DAQ
jonathan.hanks@LIGO.ORG - posted 16:32, Wednesday 07 September 2016 (29521)
Frame writer status
This is a follow-up on the issues seen by h1fw0 as detailed in https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=29452

Yesterday we installed a new build of daqd on h1fw0 and h1fw1.  This daqd wrote writes more debug information to logs, to help us see diagnostics of the input stream.  Looking at a frame that showed inconsistencies we saw what appears to be a series of 1/16s time slices that were flipped.

After reviewing some code with Jim Warner I noticed a bug in the newer code that could allow a time slice to be reordered when there was a stall in one of the producer threads (the producer threads injest the data).  This was fixed, and h1fw0 & h1fw1 were restarted.

This fix will clear up at least some of the issues we have seen. 
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