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Zero-Value Caches: ...
Zero-Value Caches: Cancelling Loads that Return Zero
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- Islam, Mafijul, 1975 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- McKee, Sally A, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Stenström, Per, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- ISBN 9780769537719
- 2009
- Engelska.
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Ingår i: Parallel Architectures and Compilation Techniques - Conference Proceedings, PACT. - 1089-795X. - 9780769537719 ; , s. 237-245
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Abstract
Ämnesord
Stäng
- The speed gap between processor and memory continues to limit performance. To address this problem, we explore the potential of eliminating Zero Loads — loads accessing memory locations that contain the value “zero” — to improve performance and energy dissipation. Our study shows that such loads comprise as many as 18% of the total number of dynamic loads. We show that a significant fraction of zero loads ends up on the critical memory-access path in out-of-order cores. We propose a non-speculative microarchitectural technique — Zero-Value Cache (ZVC) — to capitalize on zero loads and explore critical design options of such caches. We show that with modest investment (typically a 576-byte structure), we can obtain speedups up to 78% and reduce the overall energy dissipation up to 39%. Most importantly, zero-value caches never cause performance loss.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datorteknik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Engineering (hsv//eng)
- NATURVETENSKAP -- Data- och informationsvetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences (hsv//eng)
Nyckelord
- Load Criticality
- Zero-Value Cache
- Load Scheduling
- Frequent Value Locality
- Zero Load
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