Patents by Inventor Devon S. Yu

Devon S. Yu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Scheduling normally interchangeable facilities in multiprocessor computer systems
    Patent number: 5404563
    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.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: April 4, 1995
    Assignee: International Business Machines Corporation
    Inventors: Lucina L. Green, Peter H. Gum, Roger E. Hough, Sandra L. Rankin, Stephen J. Schmandt, Ronald M. Smith, Sr., Vincent A. Spano, Phil C. Yeh, Devon S. Yu