How much does network contention affect distributed shared memory performance

摘要: Most of recent research on distributed shared memory (DSM) systems have focused either careful design node controllers or cache coherence protocols. While evaluating these designs, simplified models networks (constant latency average based the network size) are typically used. Such completely ignore contention. To help designers to better for DSM systems, in this paper; we focus two goals: 1) isolate and quantify impact link contention interface overall performance applications 2) study critical architectural parameters categories We achieve goals by a set SPLASH2 benchmarks simulator using three models. For an 8/spl times/8 wormhole system, our results show that can degrade up 59.8%. Out this, 7.2% is caused alone. The indicates becomes dominant small caches, wide line sizes, low degrees associativity, high processing speeds, widths.