Difference: MemBUS (4 vs. 5)

Revision 52008-03-11 - VangelisKoukis

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The Memory Bandwidth aware Userspace Scheduler (MemBUS)

Symmetric Multiprocessor (SMPs) are commonly used as the building blocks for scalable clustered systems. Often they are combined with modern, low-latency, high-bandwidth interconnects such as Myrinet. However, their design leads to contention among processors for access to shared resources, which can limit their efficiency significantly.

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Later on, MemBUS was expanded [ICPADS 2006] to support cluster-wide gang scheduling; context switches are coordinated so that all peer processes belonging to the same job are scheduled simultaneously across the cluster, while trying to minimize interference due to contention for access to main memory and to the NIC on each node. Experimental evaluation based on the NAS parallel benchmark suite showed singificant increase in throughput compared to uncoordinated local scheduling.

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Publications

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Publications

E. Koukis and N. Koziris, “Memory and Network Bandwidth Aware Scheduling of Multiprogrammed Workloads on Clusters of SMPs,” Proceedings of the 12th International Conference on Parallel and Distributed Systems (ICPADS 2006), pp. 345-354, Minneapolis, MN, USA, 12-15 July, 2006
E. Koukis and N. Koziris, “Memory Bandwidth Aware Scheduling for SMP Cluster Nodes,” Proceedings of the 13th Euromicro Conference on Parallel, Distributed and Network-based Processing (PDP '05), pp. 187-196, Lugano, Switzerland, 6-11 Feb. 2005

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