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HPCA
2009
IEEE

Practical off-chip meta-data for temporal memory streaming

14 years 12 months ago
Practical off-chip meta-data for temporal memory streaming
Prior research demonstrates that temporal memory streaming and related address-correlating prefetchers improve performance of commercial server workloads though increased memory level parallelism. Unfortunately, these prefetchers require large on-chip meta-data storage, making previously-proposed designs impractical. Hence, to improve practicality, researchers have sought ways to enable timely prefetch while locating meta-data entirely off-chip. Unfortunately, current solutions for off-chip meta-data increase memory traffic by over a factor of three. We observe three requirements to store meta-data off chip: minimal off-chip lookup latency, bandwidthefficient meta-data updates, and off-chip lookup amortized over many prefetches. In this work, we show: (1) minimal off-chip meta-data lookup latency can be achieved through a hardware-managed main memory hash table, (2) bandwidth-efficient updates can be performed through probabilistic sampling of meta-data updates, and (3) off-chip looku...
Thomas F. Wenisch, Michael Ferdman, Anastasia Aila
Added 25 Nov 2009
Updated 25 Nov 2009
Type Conference
Year 2009
Where HPCA
Authors Thomas F. Wenisch, Michael Ferdman, Anastasia Ailamaki, Babak Falsafi, Andreas Moshovos
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