Method and apparatus for dynamic work reassignment among asymmetric, coupled processors
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United States of America Patent
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Apr 5, 1994
Grant Date -
N/A
app pub date -
Nov 19, 1992
filing date -
Nov 19, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tightly-coupled processor complex comprises two or more processors, the complex being asymmetric in that a feature available on one processor is not available on at least one other processor. A work selection mechanism selects one of a set of one or more ready work units, each capable of execution on one or more of the asymmetric processors. A processor set identification function identifies an 'indirect idle' set of processors which can participate as hosts in work reassignment to make use of a previously idle processor, and identifies an 'indirect bump' set of processors which can participate as hosts in work reassignment to displace a lowest priority work unit previously executing - any work reassignment being initiated by an assigner means and comprising an optimized number of work reassignment steps reassigning work among one of the processor sets to accomplish a related assignment goal (making use of a previously idle processor, or displacing a lowest priority work unit).
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