Parallel Processing

In parallel processing systems, many events may be considered and acted upon simultaneously. Since a variety of actions may be considered simultaneously, coherence in behavior is an issue for parallel systems. A parallel system may be synchronous, in which there is an explicit parallel decision cycle or asynchronous. In asynchronous systems, there are usually a set of independent components which act autonomously to one another; this makes coherence an even more difficult problem. A parallel architecture does not necessarily imply parallel processing; for instance, the human cognitive architecture is inherently serial at the cognitive level even though the biological band is explicitly parallel. However, there may tremendous improvements to efficiency for some parallel processing strategies, compared to serial ones.

The following systems use some parallel techniques in their implementation:


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