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:
Mar. 06, 2012
Filed:
Nov. 13, 2008
Dennis J. Dahlen, Rhinebeck, NY (US);
David A. Elko, Austin, TX (US);
Ronald M. Smith, Sr., Wappingers Falls, NY (US);
Lin Zhang, Yorktown Heights, NY (US);
Dennis J. Dahlen, Rhinebeck, NY (US);
David A. Elko, Austin, TX (US);
Ronald M. Smith, Sr., Wappingers Falls, NY (US);
Lin Zhang, Yorktown Heights, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system, method and computer program product for calibrating a Time Of Day (TOD)-clock in a computing system node provided in a multi-node network. The network comprises an infrastructure of computing devices each having a physical clock providing a time base for executing operations that is stepped to a common oscillator. The system implements steps for obtaining samples of timing values of a computing device in the network, the values including a physical clock value maintained at that device and a TOD-offset value; computing an oscillator skew value from the samples; setting a fine steering rate value as equal to the opposite of the computed oscillator skew value; and, utilizing the fine steering rate value to adjust the physical clock value and correct for potential oscillator skew errors occurring in the oscillator crystal at the computing device.