Run. Event and Detector Response WG

Work plan 2008

1] Parallel navigation

 - Finalize
 - Co-work with Geometry and Generic Processes WGs

2] Command-based scoring

 - Finalize box mesh
 - Introduce / finalize cylindrical mesh

3] Prototype multi-core extension of Geant4

 Gene Cooperman and his student, Xin Dong, developed a prototype 
thread-parallel version of Geant4 (event-level parallelism)
to take advantage of multi-core processors. 

 In this prototype all global data is made thread-local (thread-private). 
Future work will concentrate on enhancing the spatial locality of 
the code to better use the limited cache. 

 Two opportunities for this are:
 (1) selectively allowing the larger data structures to be shared instead
 of thread-local; and 
 (2) coordinating threads to use the same Geant4 code at the same time 
 (for example, to prioritize processing of tracks concerned with 
 a particular particle first). 
Other advantages are the ability to parallelize slow initialization 
code, and the potential for fine-grained track-level parallelism.