Memory semantics (computing)

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

Parallel computing

General	Distributed computing Cloud computing High-performance computing

Levels	Bit Instruction Task Data Memory

Multithreading	Temporal Simultaneous Preemptive Cooperative

Theory	PRAM model Analysis of parallel algorithms Amdahl's law Gustafson's law Cost efficiency Karp–Flatt metric Slowdown Speedup

Elements	Process Thread Fiber Instruction window

Coordination	Multiprocessing Memory coherency Cache coherency Cache invalidation Barrier Synchronization Application checkpointing

Programming	Models Implicit parallelism Explicit parallelism Concurrency Non-blocking algorithm

Hardware	Flynn's taxonomy SISD SIMD MISD MIMD Pipelined processor Superscalar processor Vector processor Multiprocessor symmetric asymmetric Memory shared distributed distributed shared UMA NUMA COMA Massively parallel computer Computer cluster Grid computer

APIs	POSIX Threads OpenMP OpenCL OpenHMPP OpenACC MPI PVM UPC TBB Boost.Thread Global Arrays Ateji PX Charm++ Cilk Coarray Fortran CUDA Dryad C++ AMP PLINQ TPL

Problems	Embarrassingly parallel Software lockout Scalability Race condition Deadlock Livelock Starvation Deterministic algorithm Parallel slowdown

Category: parallel computing Media related to parallel computing at Wikimedia Commons

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Memory semantics (computing)

See also

References