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- W2127745296 abstract "Transient faults from neutron and alpha particle strikes in large SRAM caches have become a major problem for microprocessor designers. To protect these caches, designers often use error correcting codes (ECC), which typically provide single-bit error correction and double-bit error detection (SECDED). Unfortunately, two separate strikes could still flip two different bits in the same ECC-protected word. This we call a temporal double-bit error. SECDED ECC can only detect, not correct such errors. We show how to compute the mean time to failure for temporal double-bit errors. Additionally, we show how fixed-interval scrubbing - in which error checkers periodically access cache blocks and remove single-bit errors - can mitigate such errors in processor caches. Our analysis using current soft error rates shows that only very large caches (e.g., hundreds of megabytes to gigabytes) need scrubbing to reduce the temporal double-bit error rate to a tolerable range." @default.
- W2127745296 created "2016-06-24" @default.
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- W2127745296 date "2004-06-10" @default.
- W2127745296 modified "2023-09-26" @default.
- W2127745296 title "Cache scrubbing in microprocessors: myth or necessity?" @default.
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- W2127745296 doi "https://doi.org/10.1109/prdc.2004.1276550" @default.
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