Nebelung: Execution Environment for Transactional OpenMP

摘要

proof-of-concept implementation of OpenMP with TM. Some language extensions to OpenMP are proposed to express transactions. These extensions are implemented in our source-to-source OpenMP Mercurium compiler and our Software Transactional Memory (STM) runtime system Nebelung that supports the code generated by Mercurium. Hardware Transactional Memory (HTM) or Hardware-assisted STM (HaSTM) are seen as possible paths to make the tandem TM-OpenMP more scalable. In the evaluation section we show the preliminary results. The paper finishes with a set of open issues that still need to be addressed, either in OpenMP or in the hardware/software implementations of TM.