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DATE
2010
IEEE

Performance-asymmetry-aware topology virtualization for defect-tolerant NoC-based many-core processors

13 years 1 months ago
Performance-asymmetry-aware topology virtualization for defect-tolerant NoC-based many-core processors
Topology virtualization techniques are proposed for NoCbased many-core processors with core-level redundancy to isolate hardware changes caused by on-chip defective cores. Prior work focuses on homogeneous cores with symmetric performance and optimizes on-chip communication only. However, core-to-core performance asymmetry due to manufacturing process variations poses new challenges for constructing virtual topologies. Lower performance cores may scatter over a virtual topology, while operating systems typically allocate tasks to continuous cores. As a result, parallel applications are probably assigned to a region containing many slower cores that become bottlenecks. To tackle the above problem, in this paper we present a novel performance-asymmetry-aware reconfiguration algorithm Bubble-Up based on a new metric called core fragmentation factor (CFF). Bubble-Up can arrange cores with similar performance closer, yet maintaining reasonable hop distances between virtual neighbors, thus ...
Lei Zhang 0008, Yue Yu, Jianbo Dong, Yinhe Han, Sh
Added 01 Mar 2011
Updated 01 Mar 2011
Type Journal
Year 2010
Where DATE
Authors Lei Zhang 0008, Yue Yu, Jianbo Dong, Yinhe Han, Shangping Ren, Xiaowei Li
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