Facilitating access to status and measurement data associated with input/output processing
First Claim
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1. A method of facilitating input/output processing of a processing environment, said method comprising:
- obtaining by an input/output communications adapter of the processing environment a transport control word, said transport control word including a count of the total amount of data being transferred, an address of a descriptor control block to be sent to a control unit of the processing environment, in which the descriptor control block includes a plurality of input/output commands to be executed, an address of a list that informs the input/output communications adapter where to store or fetch data received from or transmitted to the control unit, and a location in memory where to store ending status from the control unit, said ending status being directly accessible by an operating system of the processing environment;
forwarding from the input/output communications adapter to a control unit the descriptor control block that includes the plurality of input/output commands as one entity, wherein the forwarding includes forwarding from the input/output communications adapter to the control unit the descriptor control block including the plurality of input/output commands in a single communication; and
executing by the control unit the plurality of input/output commands to perform one or more input/output operations, wherein the executing is performed absent a tracking by the input/output communications adapter of state relative to the individual input/output commands of the plurality of input/output commands being executed by the control unit.
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Abstract
Input/output processing is facilitated by readily enabling access to information associated with input/output processing. This information includes status information and measurement data provided by a control unit executing input/output commands. The status and measurement data are provided in a status control block identified in a transport control word, which is further used to specify a location in memory that includes the input/output commands to be executed.
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7 Claims
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1. A method of facilitating input/output processing of a processing environment, said method comprising:
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obtaining by an input/output communications adapter of the processing environment a transport control word, said transport control word including a count of the total amount of data being transferred, an address of a descriptor control block to be sent to a control unit of the processing environment, in which the descriptor control block includes a plurality of input/output commands to be executed, an address of a list that informs the input/output communications adapter where to store or fetch data received from or transmitted to the control unit, and a location in memory where to store ending status from the control unit, said ending status being directly accessible by an operating system of the processing environment; forwarding from the input/output communications adapter to a control unit the descriptor control block that includes the plurality of input/output commands as one entity, wherein the forwarding includes forwarding from the input/output communications adapter to the control unit the descriptor control block including the plurality of input/output commands in a single communication; and executing by the control unit the plurality of input/output commands to perform one or more input/output operations, wherein the executing is performed absent a tracking by the input/output communications adapter of state relative to the individual input/output commands of the plurality of input/output commands being executed by the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification