MEMORY SEMANTICS (COMPUTING) - Encyclopedia Information

In computing and parallel processing, memory semantics refers to the process logic used to control access to shared memory locations, or at a higher level to shared variables in the presence of multiple threads or processors.^[1]

Memory semantics may also be defined for transactional memory, where issues related to the interaction of transactions and locks, and user-level actions need to be defined and specified.^[2]

References

^ Advances in Computers, Volume 79 by Marvin V. Zelkowitz 2010 ISBN 0123810272 pages 104-105
^ Towards transactional memory semantics for C++ by Tatiana Shpeisman et al in Proceedings of the twenty-first annual symposium on Parallelism in algorithms and architectures 2009 ISBN 978-1-60558-606-9 [1]

v t e Parallel computing
General	Distributed computing Parallel computing Massively parallel Cloud computing High-performance computing Multiprocessing Manycore processor GPGPU Computer network Systolic array
Levels	Bit Instruction Thread Task Data Memory Loop Pipeline
Multithreading	Temporal Simultaneous (SMT) Simultaneous and heterogenous Speculative (SpMT) Preemptive Cooperative Clustered multi-thread (CMT) Hardware scout
Theory	PRAM model PEM model Analysis of parallel algorithms Amdahl's law Gustafson's law Cost efficiency Karp–Flatt metric Slowdown Speedup
Elements	Process Thread Fiber Instruction window Array
Coordination	Multiprocessing Memory coherence Cache coherence Cache invalidation Barrier Synchronization Application checkpointing
Programming	Stream processing Dataflow programming Models Implicit parallelism Explicit parallelism Concurrency Non-blocking algorithm
Hardware	Flynn's taxonomy SISD SIMD Array processing (SIMT) Pipelined processing Associative processing MISD MIMD Dataflow architecture Pipelined processor Superscalar processor Vector processor Multiprocessor symmetric asymmetric Memory shared distributed distributed shared UMA NUMA COMA Massively parallel computer Computer cluster Beowulf cluster Grid computer Hardware acceleration
APIs	Ateji PX Boost Chapel HPX Charm++ Cilk Coarray Fortran CUDA Dryad C++ AMP Global Arrays GPUOpen MPI OpenMP OpenCL OpenHMPP OpenACC Parallel Extensions PVM pthreads RaftLib ROCm UPC TBB ZPL
Problems	Automatic parallelization Deadlock Deterministic algorithm Embarrassingly parallel Parallel slowdown Race condition Software lockout Scalability Starvation
Category: Parallel computing

References

^ Advances in Computers, Volume 79 by Marvin V. Zelkowitz 2010 ISBN 0123810272 pages 104-105
^ Towards transactional memory semantics for C++ by Tatiana Shpeisman et al in Proceedings of the twenty-first annual symposium on Parallelism in algorithms and architectures 2009 ISBN 978-1-60558-606-9 [1]

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