This paper addresses the problem of extracting coarse-grained parallelism from large sequential code. It builds on BOP, a system for software speculative parallelization. BOP lets a user to mark possibly parallel regions (PPR) in a program and at run-time specula-tively executes PPR instances using Unix processes. This short paper presents a new run-time support called continuous speculation, which fully utilizes available parallelism to tolerate differences in PPR task size and processor speed.
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