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Transparent Threads: Resource Sharing in SMT Processors for High Single-Thread Performance

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Transparent Threads: Resource Sharing in SMT Processors for High Single-Thread Performance
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, we 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 online performance monitoring. To realize transparent threads, we propose three mechanisms for maintaining the transparency of background threads: slot prioritization, background thread instruction-window partitioning, and background thread flushing. In addition, we propose three mechanisms to ...
Gautham K. Dorai, Donald Yeung
Added 15 Jul 2010
Updated 15 Jul 2010
Type Conference
Year 2002
Where IEEEPACT
Authors Gautham K. Dorai, Donald Yeung
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