CSC '90 Proceedings of the 1990 ACM annual conference on Cooperation
Route packets, not wires: on-chip inteconnection networks
Proceedings of the 38th annual Design Automation Conference
A Fast and Efficient Processor Allocation Scheme for Mesh-Connected Multicomputers
IEEE Transactions on Computers
Allocating Precise Submeshes in Mesh Connected Systems
IEEE Transactions on Parallel and Distributed Systems
Exploiting Microarchitectural Redundancy For Defect Tolerance
ICCD '03 Proceedings of the 21st International Conference on Computer Design
Thousand core chips: a technology perspective
Proceedings of the 44th annual Design Automation Conference
Proceedings of the conference on Design, automation and test in Europe
On topology reconfiguration for defect-tolerant NoC-based homogeneous manycore systems
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Energy and reliability oriented mapping for regular Networks-on-Chip
NOCS '11 Proceedings of the Fifth ACM/IEEE International Symposium on Networks-on-Chip
Network-on-Chip virtualization in Chip-Multiprocessor Systems
Journal of Systems Architecture: the EUROMICRO Journal
Maintaining real-time application timing similarity for defect-tolerant NoC-based many-core systems
ACM Transactions on Embedded Computing Systems (TECS) - Special Section ESFH'12, ESTIMedia'11 and Regular Papers
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Topology virtualization techniques are proposed for NoC-based 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 accelerating applications with higher degree of parallelism, without changing existing allocation strategies for OS. Experimental results show its effectiveness.