PROCESSING OF DATA TO MONITOR INPUT/OUTPUT OPERATIONS
First Claim
1. A computer program product for processing communications between a control unit and a channel subsystem in an input/output processing system, comprising a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
- sending a command from the channel subsystem to the control unit to initiate an input/output operation;
setting a time period for completion of the operation; and
responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command.
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Accused Products
Abstract
A computer program product, an apparatus, and a method for processing communications between a control unit and a channel subsystem in an input/output processing system are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method. The method includes: sending a command from the channel subsystem to the control unit to initiate an input/output operation; setting a time period for completion of the operation; and responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command.
161 Citations
25 Claims
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1. A computer program product for processing communications between a control unit and a channel subsystem in an input/output processing system, comprising a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
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sending a command from the channel subsystem to the control unit to initiate an input/output operation; setting a time period for completion of the operation; and responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 25)
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11. An apparatus for processing communications in an input/output processing system, comprising:
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a channel subsystem of a host computer system configured for communication with a control unit capable of commanding and determining status of an I/O device, the channel subsystem performing; sending a command to the control unit to initiate an input/output operation; setting a time period for completion of the operation; and responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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21. A method of processing communications between a control unit and a channel subsystem in an input/output processing system, the method comprising:
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sending a command from the channel subsystem to the control unit to initiate an input/output operation; setting a time period for completion of the operation; and responsive to the operation not completing within the time period, sending a message to determine whether the control unit has an exchange open for the command. - View Dependent Claims (22, 23, 24)
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Specification