Hewlett-packard Development Company, L.P.

Overture Services, Inc.

Prashanth Balakrishna Bhat

Andrei Z Broder

Kenneth Mark Wilson

Richard A Kasperski

A system and method are disclosed for selecting a resource, among a plurality of resources, for servicing a request. To select a resource to service the request, a first resource is randomly selected. If a first load value associated with the first resource does not exceed a threshold value, the request is assigned to the first resource for servicing. Otherwise a second resource is randomly selected. If a second load value associated with the second resource does not exceed a threshold value, the request is assigned to the second resource for servicing. If the second load value exceeds the threshold value, the request is assigned whichever of the first and second resources has a lower load value.

Load balancing system and method in a multiprocessor system

An apparatus for and a method of memory-affinity process scheduling in CC-NUMA systems. The system includes a plurality of nodes connected to a network. A plurality of processes are running on the various nodes of the system. The system further includes at least one memory-affinity counter for each executing process for each node of the system. Process scheduling begins by assigning processes to nodes. During execution, the memory-affinity counters are incremented on every memory access. At a process rescheduling interval, the memory-affinity counters are evaluated and rescheduling is performed based on a preselected policy. At a reset interval, the memory-affinity counters are adjusted to reduce the impact of older memory accesses. The resulting memory-affinity process scheduling is NUMA aware.

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Foster City, CA, United States of America

Prashanth Balakrishna Bhat