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- W2114931471 abstract "Energy efficiency is a primary concern for microprocessor designers. A very effective approach to improving the energy efficiency of a chip is to lower its supply voltage to very close to the transitor's threshold voltage, into what is called the near-thresold region. This reduces power consumption dramatically but also decreases reliability by orders of magnitude, especially for SRAM structures such as caches. This paper presents Parichute, a novel and powerful error correction technique based on turbo product codes that allows caches to continue to operate in near-threshold, while trading off some cache capacity to store error correction information. Our Parichute-based cache implementation is flexible, allowing protection to be disabled in error-free high voltage operation and selectively enabled as the voltage is lowered and the error rate increases. Parichute is also self-testing and variation-aware, allowing selective protection of cache sections that exhibit errors at higher supply voltages because of process variation. Parichute achieves significantly stronger error correction compared to prior cache protection techniques, enabling 2× to 4× higher cache capacity at low voltages. Our results also show that a system with a Parichute-protected L2 cache can achieve a 34% reduction in system energy (processor and DRAM) compared to a system operating at nominal voltage." @default.
- W2114931471 created "2016-06-24" @default.
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- W2114931471 date "2010-12-01" @default.
- W2114931471 modified "2023-10-18" @default.
- W2114931471 title "Parichute: Generalized Turbocode-Based Error Correction for Near-Threshold Caches" @default.
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- W2114931471 doi "https://doi.org/10.1109/micro.2010.28" @default.
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