SCHEDULE: NOV 15-20, 2015

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Automatic Sharing Classification and Timely Push for Cache-Coherent Systems

SESSION: Cache and Memory Subsystems

EVENT TYPE: Papers

EVENT TAG(S): Architectures

TIME: 11:30AM - 12:00PM

SESSION CHAIR(S): Sunita Chandrasekaran

AUTHOR(S):Malek Musleh, Vijay S. Pai

ROOM:19AB

ABSTRACT:

This paper proposes and evaluates Sharing/Timing Adaptive Push (STAP), a dynamic scheme for preemptively sending data from producers to consumers to minimize critical-path communication latency. STAP uses small hardware buffers to dynamically detect sharing patterns and timing requirements. The scheme applies to both intra-node and inter-socket directory-based shared memory networks. We integrate STAP into a MOESI cache-coherence (prefetching-enabled) protocol using heuristics to detect different data sharing patterns, including broadcasts, producer/consumer, and migratory-data sharing. Using 15 benchmarks from the PARSEC and SPLASH-2 suites we show that our scheme significantly reduces communication
latency in NUMA systems and achieves an average of 9% performance improvement, with at most 3% on-chip storage overhead.

Chair/Author Details:

Sunita Chandrasekaran (Chair) - University of Delaware|

Malek Musleh - Purdue University

Vijay S. Pai - Purdue University

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Paper provided by the ACM Digital Library

Paper also available from IEEE Computer Society