Use of T4 timestamps to calculate clock offset and skew
    1.
    发明授权
    Use of T4 timestamps to calculate clock offset and skew 有权
    使用T4时间戳来计算时钟偏移和偏移

    公开(公告)号:US07865760B2

    公开(公告)日:2011-01-04

    申请号:US12245303

    申请日:2008-10-03

    IPC分类号: G06F1/04 G06F11/00 H04J3/06

    CPC分类号: G06F1/10

    摘要: Disclosed are a method and system for calculating clock offset and skew between two clocks in a computer system. The method comprises the steps of sending data packets from a first processing unit in the computer system to a second processing unit in the computer system, and sending the data packets from the second processing unit to the first processing unit. First, second, third and fourth time stamps are provided to indicate, respectively, when the packets leave the first processing unit, arrive at the second processing unit, leave the second processing unit, and arrive at the first processing unit. The method comprises the further steps of defining a set of backward delay points using the fourth time stamps, and calculating a clock offset between clocks on the first and second processing units and clock skews of said clocks using said set of backward delay points.

    摘要翻译: 公开了一种用于计算计算机系统中两个时钟之间的时钟偏移和偏差的方法和系统。 该方法包括以下步骤:将来自计算机系统中的第一处理单元的数据分组发送到计算机系统中的第二处理单元,并将数据分组从第二处理单元发送到第一处理单元。 提供第一,第二,第三和第四时间戳以分别指示分组离开第一处理单元时到达第二处理单元,离开第二处理单元并到达第一处理单元。 该方法包括以下步骤:使用第四时间戳定义一组后向延迟点;以及使用所述一组后向延迟点,计算第一和第二处理单元上的时钟之间的时钟偏移和所述时钟的时钟偏差。