Addressing Read-disturbance Issue in STT-RAM by Data Compression and Selective Duplication

Conference/Journal
IEEE
Authors
Sparsh Mittal Jeffrey S Vetter Lei Jiang
BibTex
Abstract
Abstract: In deep sub-micron region, STT-RAM (spin transfer torque RAM) shows read- disturbance error (RDE) which presents a crucial reliability challenge. We present SHIELD, a technique to mitigate RDE in STT-RAM LLCs (last level caches). SHIELD uses data compression to reduce cache-write traffic and restore requirement. Also, SHIELD keeps two copies of data blocks compressed to less than half the block size and since several LLC blocks are only accessed once, this approach avoids several restore operations. SHIELD ...