发明名称 |
System and method for calibrating a time of day clock in a computing system node provided in a multi-node network |
摘要 |
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.
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申请公布号 |
US7454648(B2) |
申请公布日期 |
2008.11.18 |
申请号 |
US20050223642 |
申请日期 |
2005.09.09 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
DAHLEN DENNIS J.;ELKO DAVID A.;SMITH, SR. RONALD M.;ZHANG LI |
分类号 |
G06F1/00;G06F1/14;G06F11/00 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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