Package Coordinators: Marco Clemencic, Charles Leggett, Stefan Roiser

Release Notes

This release features many fixes and improvements, but also a few backward incompatible changes:

• removed GaudiGSL package (in preparation for the licensing under Apache 2) (gaudi/Gaudi!879)
• change of IEventProcessor interface (gaudi/Gaudi!877)
• change (const correctness) of custom containers interfaces (gaudi/Gaudi!896)
• removed a few unused components: HLTEventLoopMgr (gaudi/Gaudi!876), AlgErrorAuditor (gaudi/Gaudi!874)
• drop support for Python custom event loop in gaudirun.py (gaudi/Gaudi!878)

Among the various additions you can find:

• Counter-based timers (gaudi/Gaudi!787)
• example of an interface for accessing conditions, which require experiment specific implementation (gaudi/Gaudi!838)
• a new interface (Gaudi::Interfaces::IAsyncEventProcessor) to allow decoupling of the main thread from the event processing thread(s) (gaudi/Gaudi!878)
• a simplified application steering class (Gaudi::Application) (gaudi/Gaudi!878)

Changed

• Update clang-format to 8 (gaudi/Gaudi!872)
• Factor TES path related code out of GaudiCommon (gaudi/Gaudi!904)
• More explicit management of EventContext in IEventProcessor (gaudi/Gaudi!877)
• Small clean up in EventLoopMgr implementations (gaudi/Gaudi!876)
• Remove GaudiGSL (gaudi/Gaudi!879)
• Do not return non-const pointers to elements of const containers (gaudi/Gaudi!896)
• Drop backwards compatibility code (gaudi/Gaudi!883, gaudi/Gaudi!900)
• HiveDataBroker: throw exception in case of same output locations in two different algorithms (gaudi/Gaudi!858)
• Delete AlgErrorAuditor (gaudi/Gaudi!874)
• PrecedenceSvc: demote ‘Verifying rules’ message to debug (gaudi/Gaudi!873)
• Replace boost::string_ref with std::string_view (gaudi/Gaudi!859)

Added

• Add optional extension of EventProcessor for asynchronous processing (gaudi/Gaudi!878)
• Add example of ConditionAccessorHolder implementation for integration in Functional (gaudi/Gaudi!838)
• Bits for the cross-experiment study on heterogeneous workflows (gaudi/Gaudi!828)
• Generalize Gaudi::Functional to support LHCb-style conditions handles (gaudi/Gaudi!899)
• Add a synthetic performance stress test for the scheduler (gaudi/Gaudi!865)
• New Minimal Event Store: EvtStoreSvc (gaudi/Gaudi!882)
• Add Counter-based timers (gaudi/Gaudi!787)
• Add support for Gaudi::Algorithm as base class of Functional algorithms (gaudi/Gaudi!897)
• Create a queue for all schedule-able algorithms (gaudi/Gaudi!869)
• Add support for specific architectures in BINARY_TAG (gaudi/Gaudi!853)
• Add getIfExits for DataHandles with AnyDataWrapper (gaudi/Gaudi!854)
• Add support for std::chrono::duration in counters (gaudi/Gaudi!849)
• Add the possibility to ask for Mode in python data handle property (gaudi/Gaudi!845)

Fixed

• Tweaks to Gaudi::Functional (gaudi/Gaudi!903)
• HiveDataBroker: Improve error message when unknown requested input (gaudi/Gaudi!906)
• Avoid copy of EventContext in Gaudi::Utils::AlgContext (gaudi/Gaudi!902)
• Reverse order of tbb task_scheduler_init and global_control (gaudi/Gaudi!895)
• Make StatusCodeSvc thread-safe (gaudi/Gaudi!885)
• ThreadPoolSvc: prefer std::unique_ptr (gaudi/Gaudi!889)
• Ensure thread termination tools only run in initialized threads (gaudi/Gaudi!887)
• Updates for MacOS and clang (gaudi/Gaudi!888, gaudi/Gaudi!894, gaudi/Gaudi!893)
• Enable std::iterator_traits<vector_of_const_<T>::iterator> (gaudi/Gaudi!855)
• Fix MessageSvc::reinitialize (gaudi/Gaudi!871)
• Fixes to EventIDRange (gaudi/Gaudi!860)
• ApplicationMgr: Call all state transition for MessageSvc and JobOptionsSvc (gaudi/Gaudi!866)
• Fix tunneling of CF decisions to inactive graph regions in multi-parent configurations (gaudi/Gaudi!863)
• Use [[fallthrough]] attribute instead of the fallthrough comment (gaudi/Gaudi!862)
• Restructure PRG sources and add visitor for Concurrent/Prompt CF inconsistency detection (gaudi/Gaudi!861)
• Sort data dependencies in HiveDataBroker debug printout (gaudi/Gaudi!868)
• Avoid displaying unused Binomial counters (gaudi/Gaudi!830)
• Python 2 & 3 compatibility (gaudi/Gaudi!832, gaudi/Gaudi!852)