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... magnitude of the discontinuity that the high performance computing (HPC) community is about to experience because of the emergence of next generation of multi-core and heterogeneous processor designs=-=[5]-=-. For at least two decades, HPC programmers have taken it for granted that each successive generation of microprocessors would, either immediately or after minor adjustments, make their old software r...

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...rous unsolved and exciting problems for the software research community. Unfortunately, it also highlights aspects of the current software environment that are either immature or under funded or both =-=[3]-=-. 2 The Challenges of Multicore It is difficult to overestimate the magnitude of the discontinuity that the high performance computing (HPC) community is about to experience because of the emergence o...

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...itical sections do not scale well to large numbers of cores and 5salternative solutions are required. One extremely promising approach is based on a concept called software transactional memory (STM) =-=[4]-=-, where critical sections area not locked, but conflicts are detected and bad transactions are rolled back. While some argue that for STM to work efficiently it will require additional hardware suppor...