Data Centers

Using Large Page and Processor Binding to Optimize the Performance of OpenMP Scientific Applications on an IBM POWER5+ System

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Executive Summary

Multicores are widely used for high performance computing and are being configured in a hierarchical manner to compose a multicore system. While this presents significant new opportunities, such as high inter-core bandwidth and low inter-core latency, it also presents new challenges in the form of inter-core resource conflict and contention. A challenge to be addressed is how well current shared-memory parallel programming paradigms, such as OpenMP, exploit the potential offered by such a multicore system for scientific applications.

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