NDLI: Address Remapping for Static NUCA in NoC-Based Degradable Chip-Multiprocessors

Content Provider	IEEE Xplore Digital Library
Author	Ying Wang Lei Zhang Yinhe Han Huawei Li Xiaowei Li
Copyright Year	2010
Abstract	Large scale Chip-Multiprocessors (CMPs) generally employ Network-on-Chip (NoC) to connect the last level cache (LLC), which is generally organized as distributed NUCA (non-uniform cache access) arrays for scalability and efficiency. On the other hand, aggressive technology scaling induces severe reliability problems, causing on-chip components (e.g., cores, cache banks, routers) failure due to manufacture defects or on-line hardware faults. Typical degradable CMPs should possess the ability to work around defects by disabling faulty components. For static NUCA architecture, when cache banks attached to a computing node are disabled, however, certain physical address sections will no longer be accessible. Prior approaches such as sets reduction introduced in Intel Xeon processor 7100 series enable turning off cache banks by masking certain sets bits in physical address1, which greatly wastes cache capacity. In this paper, we propose to tackle the above problem in a finer granularity to restrict the capacity loss in NUCA cache. Cache accesses to isolated nodes are redirected based on the utility-driven address remapping scheme that reduces data blocks conflicts in fault-tolerant shared-LLC. We evaluate our technique using GEMS simulator. Experimental results show that address remapping achieves significant improvement over the conventional cache sizing scheme.
Starting Page	70
Ending Page	76
File Size	515687
Page Count	7
File Format	PDF
ISBN	9781424489756
DOI	10.1109/PRDC.2010.33
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-13
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tiles Nickel Hardware Fault tolerance Fault tolerant systems Prediction algorithms Computer architecture Fault-tolerant cache CMP NoC NUCA Address remapping
Content Type	Text
Resource Type	Article

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