Electrical computers and digital processing systems: multicomput – Computer-to-computer data routing – Least weight routing
Patent
1995-06-23
2000-08-15
Oberley, Alvin E.
Electrical computers and digital processing systems: multicomput
Computer-to-computer data routing
Least weight routing
709102, G06F 900
Patent
active
061050539
ABSTRACT:
An operating system for a non-uniform memory access (NUMA) multiprocessor system that utilizes a software abstraction of the NUMA system hardware representing a hierarchical tree structure to maintain the most efficient level of affinity and to maintain balanced processor and memory loads. The hierarchical tree structure includes leaf nodes representing the job processors, a root node representing at least one system resource shared by all the job processors, and a plurality of intermediate level nodes representing resources shared by different combinations of the job processors. The operating system includes a medium term scheduler for monitoring the progress of active thread groups distributed throughout the system and for assisting languishing thread groups, and a plurality of dispatchers each associated with one of the job processors for monitoring the status of the associated job processor and for obtaining thread groups for the associated job processor to execute. The operating system further includes a memory manager for allocating virtual and physical memory using a plurality of memory pools and frame treasuries.
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Alfieri Robert A.
de Forest Miles A.
Kimmel Jeffrey S.
McGrath William K.
McLeod Michael J.
Caldwell P.
EMC Corporation
Oberley Alvin E.
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