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Optimizing SMT Processors for High Single-Thread Performance

Overview Simultaneous Multithreading (SMT) processors achieve high processor throughput at the expense of single-thread performance. This paper investigates resource allocation policies for SMT processors that preserve, as much as possible, the single-thread performance of designated "Foreground" threads, while still permitting other "Background" threads to share resources. Since background threads on such an SMT machine have a near-zero performance impact on foreground threads, they refer to the background threads as transparent threads. Transparent threads are ideal for performing low-priority or non-critical computations, with applications in process scheduling, subordinate multithreading, and on-line performance monitoring.

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Publisher
AI Access Foundation
File Format
PDF
Date Published
Dec 4, 2008
Format
White Papers
Topics
Processors, High Performance Computing

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