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    Method and system for time synchronization among systems using parallel sysplex links
    1.
    发明授权
    Method and system for time synchronization among systems using parallel sysplex links 有权
    使用并行系统链路的系统之间的时间同步的方法和系统

    公开(公告)号：US08949468B2

    公开(公告)日：2015-02-03

    申请号：US11247888

    申请日：2005-10-11

    Applicant: Scott M. Carlson ,  David A. Elko ,  Richard K. Errickson

    Inventor： Scott M. Carlson ,  David A. Elko ,  Richard K. Errickson

    IPC: G06F15/16 ,  G06F9/54

    CPC classification number: G06F1/12 ,  G06F1/14 ,  G06F3/0611 ,  G06F3/0655 ,  G06F3/0688 ,  G06F9/5077 ,  G06F9/546 ,  G06F12/0238 ,  G06F2212/202 ,  H04J3/0667 ,  H04J3/0697 ,  H04L29/0854

    Abstract: Disclosed are a method of and system for providing time synchronization among first and second computer systems, where each of the computer systems includes hardware, operating system software and a layer of microcode operating between said hardware and said software. The method comprises the steps of using the microcode of the first computer system to provide a first timestamp, using the microcode of the second computer system to provide a second timestamp and a third timestamp, and using the microcode of the first computer system to provide a fourth timestamp. The method comprises the further steps of using the first, second, third and fourth timestamps to determine a timing difference between the first and second computer systems, and adjusting the timing among said first and second computer systems on the basis of said determined timing difference. Preferably, the first and second computer systems are connected together by a point-to-point link; and the first timestamp is sent from the first computer system to the second computer system, and the second and third timestamps are sent from the second computer system to the first computer system over that point-to-point link.

    Abstract translation: 公开了一种用于在第一和第二计算机系统之间提供时间同步的方法和系统，其中每个计算机系统包括在所述硬件和所述软件之间操作的硬件，操作系统软件和微代码层。 该方法包括以下步骤：使用第一计算机系统的微码来提供第一时间戳，使用第二计算机系统的微码来提供第二时间戳和第三时间戳，并且使用第一计算机系统的微码来提供第一时间戳 第四个时间戳。 该方法还包括以下步骤：使用第一，第二，第三和第四时间标记来确定第一和第二计算机系统之间的定时差异，以及基于所确定的定时差来调整所述第一和第二计算机系统之间的定时。 优选地，第一和第二计算机系统通过点对点链路连接在一起; 并且第一时间戳从第一计算机系统发送到第二计算机系统，并且第二和第三时间戳通过该点对点链路从第二计算机系统发送到第一计算机系统。

    Facilitating transport mode input/output operations between a channel subsystem and input/output devices
    3.
    发明授权
    Facilitating transport mode input/output operations between a channel subsystem and input/output devices 有权
    促进通道子系统和输入/输出设备之间的传输模式输入/输出操作

    公开(公告)号：US08549185B2

    公开(公告)日：2013-10-01

    申请号：US13173725

    申请日：2011-06-30

    Applicant: Susan K. Candelaria ,  Scott M. Carlson ,  Daniel F. Casper ,  John R. Flanagan ,  Roger G. Hathorn ,  Matthew J. Kalos ,  Louis W. Ricci ,  Dale F. Riedy ,  Cynthia Sittmann

    Inventor： Susan K. Candelaria ,  Scott M. Carlson ,  Daniel F. Casper ,  John R. Flanagan ,  Roger G. Hathorn ,  Matthew J. Kalos ,  Louis W. Ricci ,  Dale F. Riedy ,  Gustav E. Sittmann, III

    IPC: G06F3/00 ,  G06F13/28 ,  G06F7/38 ,  G06F15/16

    CPC classification number: G06F13/42

    Abstract: A computer program product is provided for performing an input/output (I/O) processing operation at a host computer system. The computer program product is configured to perform: obtaining a transport command word (TCW) at a channel subsystem for an I/O operation, the TCW including an address of a transport command control block (TCCB) having a transport command area (TCA) configured to hold a first plurality of device command words (DCW) and control data associated with respective DCWs, the first plurality of DCWs including a transfer TCA extension (TTE) DCW that specifies a TCA extension, the TCA extension configured to hold one or more DCWs and control data associated with respective DCWs; gathering the TCCB from one or more locations specified in the TCCB address and transferring the TCCB to the control unit; gathering the TCA extension specified by the TTE DCW; and transferring the TCA extension to the control unit.

    Abstract translation: 提供了一种计算机程序产品，用于在主计算机系统上执行输入/输出（I / O）处理操作。 所述计算机程序产品被配置为执行：在用于I / O操作的信道子系统处获得传输命令字（TCW），所述TCW包括具有传输命令区域（TCA）的传输命令控制块（TCCB）的地址， 被配置为保持第一多个设备命令字（DCW）和与相应DCW相关联的控制数据，所述第一多个DCW包括指定TCA扩展的传输TCA扩展（TTE）DCW，所述TCA扩展被配置为保存一个或多个 DCW和与相应DCW相关联的控制数据; 从TCCB地址中指定的一个或多个位置收集TCCB，并将TCCB传送到控制单元; 收集TTE DCW指定的TCA扩展; 并将TCA扩展传输到控制单元。

    MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES
    7.
    发明申请
    MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES 审中-公开
    监控网络性能和检测使用循环传输时间的网络故障

    公开(公告)号：US20120221748A1

    公开(公告)日：2012-08-30

    申请号：US13461134

    申请日：2012-05-01

    Applicant: Scott M. Carlson ,  Marisa Freidhof ,  Geoffrey E. Miller ,  Dale F. Riedy ,  Harry M. Yudenfriend

    Inventor： Scott M. Carlson ,  Marisa Freidhof ,  Geoffrey E. Miller ,  Dale F. Riedy ,  Harry M. Yudenfriend

    IPC: G06F13/14

    CPC classification number: H04L41/0654 ,  H04L43/0864 ,  H04L43/16 ,  H04L47/12 ,  H04L47/29

    Abstract: A method of processing communications includes: receiving transmission data over a selected time interval for each of a plurality of communication paths between a host processor and a control unit configured to control at least one I/O device; calculating an average round-trip transmission time for each of the communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.

    Abstract translation: 处理通信的方法包括：在被配置为控制至少一个I / O设备的主处理器和控制单元之间的多个通信路径中的每个通信路径的选定时间间隔内接收传输数据; 在时间间隔内计算每个通信路径的平均往返传输时间; 将具有最高平均往返发送时间的通信路径的平均往返发送时间与阈值进行比较，并将平均往返发送时间的平均往返发送时间的倍数作为具有最低平均往返发送时间的通信路径 ; 以及基于将所述最高往返传输时间与所述阈值进行比较和所述最低往返传输时间的倍数来确定所述时间段是否指示所述I / O子系统和所述控制单元之间的通信中的延迟，所述控制单元需要 监视动作和恢复动作中的至少一个。

    MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES
    9.
    发明申请
    MONITORING NETWORK PERFORMANCE AND DETECTING NETWORK FAULTS USING ROUND TRIP TRANSMISSION TIMES 有权
    监控网络性能和检测使用循环传输时间的网络故障

    公开(公告)号：US20120017121A1

    公开(公告)日：2012-01-19

    申请号：US12838029

    申请日：2010-07-16

    Applicant: Scott M. Carlson ,  Marisa Freidhof ,  Geoffrey E. Miller ,  Dale F. Riedy ,  Harry M. Yudenfriend

    Inventor： Scott M. Carlson ,  Marisa Freidhof ,  Geoffrey E. Miller ,  Dale F. Riedy ,  Harry M. Yudenfriend

    IPC: G06F11/07

    CPC classification number: H04L41/0654 ,  H04L43/0864 ,  H04L43/16 ,  H04L47/12 ,  H04L47/29

    Abstract: A computer program product is provided for performing a method including: receiving transmission data over a selected time interval for each of a plurality of communication paths; calculating an average round-trip transmission time for each of the plurality of communication paths over the time interval; comparing an average round-trip transmission time for a communication path having the highest average round-trip transmission time to a threshold value and to a multiple of an average round-trip transmission time for a communication path having the lowest average round-trip transmission time; and determining, based on a result of comparing the highest round-trip transmission time to the threshold value and to a multiple of the lowest round-trip transmission time, whether the time period indicates a delay in communication between the I/O subsystem and the control unit requiring at least one of a monitoring action and a recovery action.

    Abstract translation: 提供了一种计算机程序产品，用于执行一种方法，包括：针对多个通信路径中的每一个，在选定的时间间隔内接收传输数据; 在所述时间间隔内计算所述多个通信路径中的每一个的平均往返传输时间; 将具有最高平均往返发送时间的通信路径的平均往返发送时间与阈值进行比较，并将平均往返发送时间的平均往返发送时间的倍数作为具有最低平均往返发送时间的通信路径 ; 以及基于将所述最高往返传输时间与所述阈值进行比较的结果和所述最低往返传输时间的倍数来确定所述时间段是否表示所述I / O子系统与所述第二往返传送时间之间的通信延迟 控制单元需要至少一个监视动作和恢复动作。

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