Patents by Inventor Evangelyn K. Smith

Evangelyn K. Smith 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).

  • Performing a perform timing facility function instruction for synchronizing TOD clocks
    Patent number: 8438415
    Abstract: A system, method and computer program product for steering a time-of-day (TOD) clock for a computer system having a physical clock providing a time base for executing operations that is stepped to a common oscillator. The method includes receiving, at a processing unit, a request to change a clock steering rate used to control a TOD-clock offset value for the processing unit, the TOD-clock offset defined as a function of a start time (s), a base offset (b), and a steering rate (r). The unit schedules a next episode start time with which to update the TOD-clock offset value. After updating TOD-clock offset value (d) at the scheduled time, TOD-clock offset value is added to a physical-clock value (Tr) value to obtain a logical TOD-clock value (Tb), where the logical TOD-clock value is adjustable without adjusting a stepping rate of the oscillator.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: May 7, 2013
    Assignee: International Business Machines Corporation
    Inventors: Eberhard Engler, Mark S. Farrell, Klaus Meissner, Mark A. Check, Evangelyn K. Smith
  • PERFORMING A PERFORM TIMING FACILITY FUNCTION INSTRUCTION FOR SYNCHRONIZING TOD CLOCKS
    Publication number: 20120173917
    Abstract: A system, method and computer program product for steering a time-of-day (TOD) clock for a computer system having a physical clock providing a time base for executing operations that is stepped to a common oscillator. The method includes receiving, at a processing unit, a request to change a clock steering rate used to control a TOD-clock offset value for the processing unit, the TOD-clock offset defined as a function of a start time (s), a base offset (b), and a steering rate (r). The unit schedules a next episode start time with which to update the TOD-clock offset value. After updating TOD-clock offset value (d) at the scheduled time, TOD-clock offset value is added to a physical-clock value (Tr) value to obtain a logical TOD-clock value (Tb), where the logical TOD-clock value is adjustable without adjusting a stepping rate of the oscillator.
    Type: Application
    Filed: February 22, 2012
    Publication date: July 5, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Eberhard Engler, Mark S. Farrell, Klaus Meissner, Ronald M. Smith, SR., Mark A. Check, Evangelyn K. Smith
  • Performing a perform timing facility function instruction for sychronizing TOD clocks
    Patent number: 8135978
    Abstract: A system, method and computer program product for performing a Perform Timing Facility (PTFF) instruction for steering a Time of Day (TOD) clock of the computer system for synchronizing the TOD clock with TOD clocks of other computer systems. The computer system comprises a memory; and, a processor in communications with the computer memory.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: March 13, 2012
    Assignee: International Business Machines Corporation
    Inventors: Eberhard Engler, Mark S. Farrell, Klaus Meissner, Ronald M. Smith, Sr., Evangelyn K. Smith, legal representative, Mark A. Check