Scheduling normally interchangeable facilities in multiprocessor computer systems
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United States of America Patent
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Apr 4, 1995
Issued Date -
N/A
app pub date -
Jan 14, 1994
filing date -
Aug 28, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method for dispatching logical central processing units (CPUs) among physical CPUs in a multiprocessor computer system having multiple logical partitions, wherein the cryptographic facilities may not be interchangeable. According to the present invention, the logical CPUs are dispatched among the physical CPUs according to either an affinity, floating, or disabled scheduling method. The affinity scheduling method is used when the crypto facilities are not interchangeable or when non-interchangeable crypto functions are performed. The floating scheduling method is used when the cryptographic facilities are interchangeable and interchangeable crypto functions are performed. The disabled scheduling method is used when the logical CPU is not authorized to issue cryptographic instructions.
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