GreenFlag: Protecting 3D-Racetrack Memory from Shift Errors
GreenFlag: Protecting 3D-Racetrack Memory from Shift Errors
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GreenFlag:保护 3D 赛道内存免受移位错误的影响
DOI:
10.1109/dsn.2019.00016
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Sorin, Daniel J.
中科院分区:
文献类型:
--
作者:
Mappouras, Georgios;Vahid, Alireza;Calderbank, Robert;Sorin, Daniel J.
Racetrack memory is an exciting emerging memory technology with the potential to offer far greater capacity and performance than other non-volatile memories. Racetrack memory has an unusual error model, though, which precludes the use of the typical error coding techniques used by architects. In this paper, we introduce GreenFlag, a coding scheme that combines a new construction for Varshamov-Tenegolts codes with specially crafted delimiter bits that are placed between each codeword. GreenFlag is the first coding scheme that is compatible with 3D racetrack, which has the benefit of very high density but the limitation of a single read/write port per track. Based on our implementation of encoding/decoding hardware, we analyze the trade-offs between latency, code length, and code rate; we then use this analysis to evaluate the viability of racetrack at each level of the memory hierarchy.
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2011
期刊:
International Electron Devices Meeting
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