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HPCA
2005
IEEE

Software Directed Issue Queue Power Reduction

11 years 3 months ago
Software Directed Issue Queue Power Reduction
The issue logic of a superscalar processor dissipates a large amount of static and dynamic power. Furthermore, its power density makes it a hot-spot requiring expensive cooling systems and additional packaging. In this paper we present a novel software assisted approach to power reduction where the processor dynamically resizes the issue queue based on compiler analysis. The compiler passes information to the processor about the number of entries needed which limits the number of instructions dispatched and resident in the queue. This saves power without adversely affecting performance. Compared with recently proposed hardware techniques, our approach is faster, simpler and saves more power. Using a simplistic scheme we achieve 47% dynamic and 31% static power savings in the issue queue with only a 2.2% performance loss. We then show that the performance loss
Antonio González, Jaume Abella, Michael F.
Added 01 Dec 2009
Updated 01 Dec 2009
Type Conference
Year 2005
Where HPCA
Authors Antonio González, Jaume Abella, Michael F. P. O'Boyle, Timothy M. Jones
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