Challenges CPU performance Variable density Multi-thread computing New architecture of PC – many core processors Geant4 will require revisions Biasing technique There are some good results Need further development
How to Proceed with Low-Energy? It is useful to plan a separate migration for following parts of the Low-Energy software: Data structure Livermore models Penelope models De-excitation module DNA models (???) Testing should be well established Old code unchanged – only urgent bug fixes should be introduced