Self-Timed Pipeline with Variable Stage Number*

The paper analyzes the problem of improving the self-timed pipeline’s performance. The paper considers possible options for reducing the pipeline latency by decreasing the number of actively operating stages when certain conditions occur, determined by the processed data value or an external signal. One stage bypassing becomes appropriate if it occurs in at least 64% of data processing operations, while two stage bypassing decreases the average pipeline latency if it occurs in 50% of operations.

本文分析了提高自定时流水线性能的问题。文中考虑了在某些由处理数据值或外部信号决定的条件出现时，通过减少活跃操作级数来降低流水线延迟的可能方案。如果在至少64%的数据处理操作中出现一级旁路是合适的，而如果在50%的操作中出现两级旁路则会降低平均流水线延迟。