Apparatus and method for page migration in a non-uniform memory access (NUMA) system
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Dec 17, 1996
filing date -
May 5, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A page migration controller is described. The page migration controller determines whether a memory page addressed by a memory access request should be migrated from a local processing node to a requester processing node. The page migration controller accesses an array to obtain a first count associated with the addressed memory page and the requester processing node, and a second count associated with the addressed memory page and the local processing node. The first count is incremented, and then the second count is subtracted from the incremented first count to obtain a difference between the second count and the incremented first count. A comparator determines whether the difference is greater than a migration threshold value. If the difference is greater than the migration threshold value, then a migration interrupt is issued.
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