Patents by Inventor Donald Francis Baldus

Donald Francis Baldus 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).

  • Method and system for maintaining cache coherence in a multiprocessor-multicache environment having unordered communication
    Patent number: 6088768
    Abstract: A method and system for providing cache coherence despite unordered interconnect transport. In a computer system of multiple memory devices or memory units having shared memory and an interconnect characterized by unordered transport, the method comprises sending a request packet over the interconnect from a first memory device to a second memory device requiring that an action be carried out on shared memory held by the second memory device. If the second memory device determines that the shared memory is in a transient state, the second memory device returns the request packet to the first memory device; otherwise, the request is carried out by the second memory device. The first memory device will continue to resend the request packet each time that the request packet is returned.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: July 11, 2000
    Assignee: International Business Machines Corporation
    Inventors: Donald Francis Baldus, Nancy Joan Duffield, Russell Dean Hoover, John Christopher Willis, Frederick Jacob Ziegler
  • Method and system for cache coherence despite unordered interconnect transport
    Patent number: 5761721
    Abstract: A method and system for providing cache coherence despite unordered interconnect transport. In a computer system of multiple memory devices or memory units having shared memory and an interconnect characterized by unordered transport, the method comprises sending a request packet over the interconnect from a first memory device to a second memory device requiring that an action be carried out on shared memory held by the second memory device. If the second memory device determines that the shared memory is in a transient state, the second memory device returns the request packet to the first memory device; otherwise, the request is carried out by the second memory device. The first memory device will continue to resend the request packet each time that the request packet is returned.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: June 2, 1998
    Assignee: International Business Machines Corporation
    Inventors: Donald Francis Baldus, Nancy Joan Duffield, Russell Dean Hoover, John Christopher Willis, Frederick Jacob Ziegler