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Speculation Meets Checkpointing

机译:投机遇到检查点

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摘要

This paper describes a checkpointing mechanism destined for Distributed Shared Memory (DSM) systems with speculative prefetch-ing. Speculation is a general technique involving prediction of the future of a computation, namely accesses to shared objects unavailable on the accessing node (read faults). Thanks to such predictions objects can be fetched before the actual access operation is performed, resulting, at least potentially, in considerable performance improvement. The proposed mechanism is based on independent incremental checkpointing integrated with a coherence protocol introducing little overhead. It ensures the consistency of checkpoints, allowing fast recovery from failures.
机译:本文介绍了一种用于带有推测性预取功能的分布式共享内存(DSM)系统的检查点机制。推测是一种通用技术,涉及预测计算的未来,即访问访问节点上不可用的共享对象(读取错误)。由于这种预测,可以在执行实际访问操作之前获取对象,至少有可能导致显着的性能改进。所提出的机制基于与一致性协议相集成的独立增量检查点,引入的开销很小。它确保检查点的一致性,从而可以从故障中快速恢复。

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