AYUSH: A Technique for Extending Lifetime of SRAM-NVM Hybrid Caches

Journal Article · Wed Jan 01 04:00:00 EST 2014 · IEEE Computer Architecture Letters

DOI:https://doi.org/10.1109/LCA.2014.2355193· OSTI ID:1157141

Mittal, Sparsh ^[1]; Vetter, Jeffrey S ^[1]

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1. ORNL

Recently, researchers have explored way-based hybrid SRAM-NVM (non-volatile memory) last level caches (LLCs) to bring the best of SRAM and NVM together. However, the limited write endurance of NVMs restricts the lifetime of these hybrid caches. We present AYUSH, a technique to enhance the lifetime of hybrid caches, which works by using data-migration to preferentially use SRAM for storing frequently-reused data. Microarchitectural simulations confirm that AYUSH achieves larger improvement in lifetime than a previous technique and also maintains performance and energy efficiency. For single, dual and quad-core workloads, the average increase in cache lifetime with AYUSH is 6.90X, 24.06X and 47.62X, respectively.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1157141
• Journal Information: IEEE Computer Architecture Letters, Journal Name: IEEE Computer Architecture Letters; ISSN 1556-6056
• Country of Publication: United States
• Language: English

Related Subjects

Non-volatile memory (NVM)
SRAM-NVM cache
device lifetime
hybrid cache
low power
sustainable computing
write endurance