19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Papers
Inherently Workload-Balanced Clustered Microarchitecture
Denver, Colorado
April 04-April 08
ISBN: 0-7695-2312-9
The performance of clustered microarchitectures relies on steering schemes that try to find the best trade-off between workload balance and inter-cluster communication penalties. In previously proposed clustered processors, reducing communication penalties and balancing the workload are opposite targets, since improving one usually implies a detriment in the other. In this paper we propose a new clustered microarchitecture that can minimize communication penalties without compromising workload balance. The key idea is to arrange the clusters in a ring topology in such a way that results of one cluster can be forwarded to the neighbor cluster with a very short latency. In this way, minimizing communication penalties is favored when the producer of a value and its consumer are placed in adjacent clusters, which also favors workload balance. The proposed microarchitecture is shown to outperform a state-of-the-art clustered processor. For instance, for an 8-cluster configuration and just one fully pipelined unidirectional bus, 15% speedup is achieved on average for FP programs.
Citation:
Jaume Abella, Antonio Gonz?lez, "Inherently Workload-Balanced Clustered Microarchitecture," ipdps, vol. 1, pp.20a, 19th IEEE International Parallel and Distributed Processing Symposium (IPDPS'05) - Papers, 2005
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