SC13 Home > SC13 Schedule > SC13 Presentation - Mitigating System Noise With Simultaneous Multi-Threading

SCHEDULE: NOV 16-22, 2013

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Mitigating System Noise With Simultaneous Multi-Threading

SESSION: Research Poster Reception

EVENT TYPE: Posters, Electronic Posters, and Education Posters

TIME: 5:15PM - 7:00PM

AUTHOR(S):Eli Rosenthal, Edgar A. Leon, Adam T. Moody

ROOM:Mile High Pre-Function

ABSTRACT:
System noise on commodity clusters significantly impacts the scalability of scientific applications. As the number of nodes in a cluster grows, this impact outweighs the benefits of the increased system capability. In this work, we propose using Simultaneous Multi-Threading (SMT) to mitigate system noise, and we demonstrate its effectiveness using Fixed Work Quantum (FWQ) micro-benchmarks. This technique relies on using the floating-point and integer units of a core (shared SMT resources) for system processing when an application is stalled waiting for an out-of-core operation. Unlike core-specialization, which dedicates a core for system processing, our approach allows an application to use all cores of a node and proves significantly more effective in reducing system noise.

Chair/Author Details:

Eli Rosenthal - Brown University

Edgar A. Leon - Lawrence Livermore National Laboratory

Adam T. Moody - Lawrence Livermore National Laboratory

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