International Business Machines Corporation

Devon S Yu

Phil C Yeh

Roger E Hough

Ronald M Smith

Peter H Gum

Vincent A Spano

Lucina L Green

Stephen J Schmandt

Sandra L Rankin

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.

Scheduling normally interchangeable facilities in multiprocessor

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Poughkeepsie, NY, United States of America

Devon S Yu