Configurable-ECC: Architecting a Flexible ECC Scheme to Support Different Sized Accesses in High Bandwidth Memory Systems

Designing error correction code (ECC) to guarantee strong reliability for high bandwidth memory (HBM) is imperative in high performance computers, especially for systems equipped with graphics processing units (GPUs). The design of ECC is challenging because future GPUs are expected to implement a m...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:IEEE transactions on computers Ročník 68; číslo 5; s. 646 - 659
Hlavní autoři: Chen, Hsing-Min, Lee, Shin-Ying, Mudge, Trevor, Wu, Carole-Jean, Chakrabarti, Chaitali
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
3D DRAM
Bandwidth
Computer memory
Design
Energy consumption
error control coding and GPU
Error correction
Error correction codes
Fault detection
Graphics processing units
memory reliability
Random access memory
Reliability
Three-dimensional displays
Two dimensional displays
ISSN:0018-9340, 1557-9956
On-line přístup:Získat plný text
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:Designing error correction code (ECC) to guarantee strong reliability for high bandwidth memory (HBM) is imperative in high performance computers, especially for systems equipped with graphics processing units (GPUs). The design of ECC is challenging because future GPUs are expected to implement a memory subsystem supporting fine and coarse-grained data accesses to match the difference in the spatial locality of GPGPU applications. Current ECC designs, however, are developed for a fixed data fetch granularity. To have a more flexible design, we propose a novel memory protection scheme, called Config(urable)-ECC, which provides strong reliability for both fine and coarse-grained data accesses. Config-ECC consists of two tiers of ECC protection. The tier-1 code is a strong product code that can correct errors due to small granularity faults and detect errors caused by large granularity faults. The tier-2 code is an XOR-based code that is employed to correct errors incurred by large granularity faults. Config-ECC provides stronger reliability and/or lower energy consumption compared to state-of-the-art fixed 32B and 64B ECC schemes. It reduces the HBM energy by 17-21 percent while reducing the failure in time (FIT) rate by 20 times compared to a state-of-the-art fixed 64B ECC scheme with an insignificant 1.2 percent performance overhead.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0018-9340
1557-9956
DOI:10.1109/TC.2018.2886884