The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
Feb. 22, 2012
Eberhard Engler, Tuebingen, DE;
Mark S. Farrell, Pleasant Valley, NY (US);
Klaus Meissner, Herrenberg, DE;
Mark A. Check, Hopewell Junction, NY (US);
Evangelyn K. Smith, Wappingers Falls, NY (US);
Eberhard Engler, Tuebingen, DE;
Mark S. Farrell, Pleasant Valley, NY (US);
Klaus Meissner, Herrenberg, DE;
Ronald M. Smith, Sr., Wappingers Falls, NY (US);
Mark A. Check, Hopewell Junction, NY (US);
International Business Machines Corporation, Armonk, NY (US);
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.