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Aggressive prefetching is very beneficial for memory latency tolerance of many applications. However, it faces significant challenges in multi-core systems. Prefetchers of different cores on a chip multiprocessor (CMP) can cause significant interference with prefetch and demand accesses of other cores. Because existing prefetcher throttling techniques do not address this prefetcher-caused inter-core interference, aggressive prefetching in multi-core systems can lead to significant performance degradation and wasted bandwidth consumption.
Ebrahimi et al. (Sat,) studied this question.