SC is the International Conference for
 High Performnance Computing, Networking, Storage and Analysis

SCHEDULE: NOV 13-19, 2010

Reducing Cache Pollution Through Detection and Elimination of Non-Temporal Memory Accesses

SESSION: Optimization Strategies on the Node


TIME: 4:00PM - 4:30PM

SESSION CHAIR: Karl Fuerlinger

AUTHOR(S):Andreas Sandberg, David Eklöv, Erik Hagersten


Contention for shared cache resources has been recognized as a major bottleneck for multicores—especially for mixed workloads of independent applications. While most modern processors implement instructions to manage caches, these instructions are largely unused due to a lack of understanding of how to best leverage them. This paper introduces a classification of applications into four cache usage categories. We discuss how applications from different categories affect each other's performance indirectly through cache sharing and devise a scheme to optimize such sharing. We also propose a low-overhead method to automatically find the best per-instruction cache management policy. We demonstrate how the indirect cache-sharing effects of mixed workloads can be tamed by automatically altering some instructions to better manage cache resources. Practical experiments demonstrate that our software-only method can improve application performance up to 35% on x86 multicore hardware.

Chair/Author Details:

Karl Fuerlinger (Chair) - University of California, Berkeley

Andreas Sandberg - Uppsala University

David Eklöv - Uppsala University

Erik Hagersten - Uppsala University

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The full paper can be found in the ACM Digital Library and IEEE Computer Society

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