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Extended measurement word determination at a channel subsystem of an I/O processing system

  • US 7,937,507 B2
  • Filed: 02/14/2008
  • Issued: 05/03/2011
  • Est. Priority Date: 02/14/2008
  • Status: Active Grant
First Claim
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1. An article of manufacture comprising at least one computer usable medium having computer readable program code logic to determine an extended measurement word at a channel subsystem of an input/output (I/O) processing system using data from a control unit, the computer readable program code logic for performing a method comprising:

  • sending a command message to the control unit;

    receiving a transport response information unit message at the channel subsystem in response to sending the command message to the control unit;

    extracting a plurality of time values from the transport response information unit message as calculated by the control unit;

    calculating an extended measurement word as a function of the extracted time values; and

    writing the calculated extended measurement word to computer readable memory in the I/O processing system.

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