Extending Open64 with Transactional Memory Features

The fast development of parallel platforms is demanding more parallelism in modern applications. However, the manipulation of mutual-excluded memory accesses is obstructing the way towards high productivity in parallel software development for shared memory system. Transactional Memory (TM) is a promising paradigm that helps abstract the complexity of concurrency while keeping the scalability. And the compilers for TM are needed in order to facilitate both parallel programmers and TM researchers. This paper describes the design, detailed implementation, and optimization of our extension of TM features in Open64. The preliminary experimental results show that our optimized implementation of the compiler, together with a high performance TM runtime, have the potential to be competitive for parallel programs with fine grained locks. 1