Techniques for improved clock offset measuring
    2.
    发明授权
    Techniques for improved clock offset measuring 有权
    改进时钟偏移测量技术

    公开(公告)号:US08788689B2

    公开(公告)日:2014-07-22

    申请号:US13554000

    申请日:2012-07-20

    IPC分类号: G06F15/16

    CPC分类号: H04J3/0667 H04L47/10

    摘要: In an exemplary aspect, method, apparatus, and program products are disclosed suitable for clock offset determination. One method includes performing a number of exchanges of at least single bytes with another network node, where values of the single bytes are different for the exchanges. The method also includes capturing and storing timestamps for each of the number of exchanges performed on the network node. A second method includes capturing and saving arrival timestamps for each of a number of timing messages in a set of timing messages received from another network node. This second method also includes sending the timestamps to at least the another node in response to completion of the set of timing messages.

    摘要翻译: 在示例性方面,公开了适用于时钟偏移确定的方法,装置和程序产品。 一种方法包括与另一个网络节点执行至少单个字节的多个交换,其中单个字节的值对于交换机是不同的。 该方法还包括捕获和存储在网络节点上执行的每个交换机的时间戳。 第二种方法包括捕获并保存从另一网络节点接收的一组定时消息中的多个定时消息中的每一个的到达时间戳。 该第二种方法还包括响应于该组定时消息的完成向至少另一个节点发送时间戳。

    Executing perform floating point operation instructions
    5.
    发明授权
    Executing perform floating point operation instructions 有权
    执行执行浮点运算指令

    公开(公告)号:US08627050B2

    公开(公告)日:2014-01-07

    申请号:US11868605

    申请日:2007-10-08

    IPC分类号: G06F9/30

    摘要: A method and system are disclosed for executing a machine instruction in a central processing unit. The method comprise the steps of obtaining a perform floating-point operation instruction; obtaining a test bit; and determining a value of the test bit. If the test bit has a first value, (a) a specified floating-point operation function is performed, and (b) a condition code is set to a value determined by said specified function. If the test bit has a second value, (c) a check is made to determine if said specified function is valid and installed on the machine, (d) if said specified function is valid and installed on the machine, the condition code is set to one code value, and (e) if said specified function is either not valid or not installed on the machine, the condition code is set to a second code value.

    摘要翻译: 公开了用于在中央处理单元中执行机器指令的方法和系统。 该方法包括以下步骤:获得执行浮点运算指令; 获得一个测试位; 并确定测试位的值。 如果测试位具有第一值,则(a)执行指定的浮点运算功能,并且(b)条件代码被设置为由所述指定函数确定的值。 如果测试位具有第二个值,(c)进行检查以确定所述指定的功能是否有效并且安装在机器上,(d)如果所述指定的功能是有效的并且安装在机器上,则设置条件代码 到一个代码值,以及(e)如果所述指定的功能无效或未安装在机器上,则条件代码被设置为第二代码值。

    Use of T4 timestamps to calculate clock offset and skew
    7.
    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。

    Techniques for improved clock offset measuring
    9.
    发明授权
    Techniques for improved clock offset measuring 有权
    改进时钟偏移测量技术

    公开(公告)号:US08533355B2

    公开(公告)日:2013-09-10

    申请号:US12610430

    申请日:2009-11-02

    IPC分类号: G06F15/16

    CPC分类号: H04J3/0667 H04L47/10

    摘要: In an exemplary aspect, method, apparatus, and program products are disclosed suitable for clock offset determination. One method includes performing a number of exchanges of at least single bytes with another network node, where values of the single bytes are different for the exchanges. The method also includes capturing and storing timestamps for each of the number of exchanges performed on the network node. A second method includes capturing and saving arrival timestamps for each of a number of timing messages in a set of timing messages received from another network node. This second method also includes sending the timestamps to at least the another node in response to completion of the set of timing messages.

    摘要翻译: 在示例性方面,公开了适用于时钟偏移确定的方法,装置和程序产品。 一种方法包括与另一个网络节点执行至少单个字节的多个交换,其中单个字节的值对于交换机是不同的。 该方法还包括捕获和存储在网络节点上执行的每个交换机的时间戳。 第二种方法包括捕获并保存从另一网络节点接收的一组定时消息中的多个定时消息中的每一个的到达时间戳。 该第二种方法还包括响应于该组定时消息的完成向至少另一个节点发送时间戳。

    Method and apparatus for maintaining time in a computer system
    10.
    发明授权
    Method and apparatus for maintaining time in a computer system 失效
    在计算机系统中保持时间的方法和装置

    公开(公告)号:US08055929B2

    公开(公告)日:2011-11-08

    申请号:US12186658

    申请日:2008-08-06

    CPC分类号: G06F1/14

    摘要: A computer system is arranged with a circular buffer that includes a piecewise linear map from a high-resolution counter arranged to maintain International Atomic Time. The piecewise linear map includes a current leg that is currently being used and also a future leg that will be used in the future. The future leg is computed while the current leg is still being used.

    摘要翻译: 计算机系统布置有循环缓冲器,其包括布置成保持国际原子时间的高分辨率计数器的分段线性映射。 分段线性映射包括当前正在使用的当前分支,以及将来将要使用的未来分支。 当前腿仍在使用时计算未来的腿。