Silicon Graphics, Incorporated

Leonard Mark Widra

David Edward McCracken

James A Stuart Fiske

A method for controlling memory page migration in a parallel processor computer ( ) is provided that comprises requesting access to a memory page ( ) by a requester processor ( ). The method then determines whether the requester processor ( ) is a local processor or a remote processor. The method then increments a local access counter ( ) and identifies the local access counter ( ) as an incremented counter in response to determining that the requester processor ( ) is a local processor. If the requester processor ( ) is determined to be a remote processor, the method increments a remote access counter ( ) and identifies the remote access counter ( ) as the incremented counter. The method next sets a threshold processing indicator to a positive value if the incremented counter exceeds a value threshold ( ) or if a difference between the local access counter ( ) and the remote access counter ( ) exceeds a difference threshold ( ). The method then generates a system interrupt in response to a positive threshold processing indicator.

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Saratoga, CA, United States of America

Leonard Mark Widra