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Draft: Make TRTRawDataProvider reentrant

Closed Goetz Gaycken requested to merge goetz/athena:TRTRawDataProvider_master_make_reentrant into master

The TRTRawDataProvider shows up high in the contention list of the avalanche scheduler. Thus, making it reentrant could improve the event throughput in athenaMT.

This requires a few fixes:

  • Only install the TRT compression table version if it does not exist yet, to avoid a use after delete.
  • The ROBDataProviderSvc should not store per event information which is reset for each event in a member variable but rather use the existing per event cache.
  • Remove unnecessary detection whether the event has changed from TRTRawDataProviderTool, The tool can only be called once per event (or view).
Edited by Goetz Gaycken