New LCLS detector logic inefficiencies

FXIhub / hummingbird

Monitoring and Analysing flash X-ray imaging experiments

http://fxihub.github.io/hummingbird

BSD 2-Clause "Simplified" License

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New LCLS detector logic inefficiencies #107

Closed cnettel closed 7 years ago

cnettel commented 7 years ago

The new LCLS detector logic triggers repeated stat calls to /reg/d/psdm/detector/calib/pnccd/pnccd-Camp.0-pnCCD.0.h5 and possibly other reinitialization activities.

cnettel commented 7 years ago

Probably just a nuisance unless filesystem load gets very high. Conclusion during investigation also indicates that "smd" (small data) psana mode causes actual XTC files to be closed and reopened once per event.

cnettel commented 7 years ago

The original issue was supposedly solved by a new psana release during the lq40 experiment.