Multiprocessor Semaphores

Multiprocessing architectures are becoming pervasive. DSPs are widely used in dense multiprocessor arrangements at the network edge, and systems-on-chip often include DSP cores to accelerate math-intensive computation. Although DSP/BIOS provides a standard, efficient, robust API for uniprocessor applications, we sometimes encounter situations where interprocessor synchronization mechanisms would be very useful. This article takes a quick look at multiprocessor mutual exclusion and suggests a method to implement interprocessor semaphores using DSP/BIOS.

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