发明授权
US07904605B2 Computer command and response for determining the state of an I/O operation
有权
用于确定I / O操作状态的计算机命令和响应
- 专利标题： Computer command and response for determining the state of an I/O operation
- 专利标题（中）： 用于确定I / O操作状态的计算机命令和响应
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申请号： US12030975申请日： 2008-02-14
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公开(公告)号： US07904605B2公开(公告)日： 2011-03-08
- 发明人: Harry M. Yudenfriend , Scott M. Carlson , Daniel F. Casper , John R. Flanagan , Roger G. Hathorn , Catherine C. Huang , Matthew J. Kalos , Ugochukwu C. Njoku , Louis W. Ricci , Dale F. Riedy , Gustav E. Sittmann
- 申请人： Harry M. Yudenfriend , Scott M. Carlson , Daniel F. Casper , John R. Flanagan , Roger G. Hathorn , Catherine C. Huang , Matthew J. Kalos , Ugochukwu C. Njoku , Louis W. Ricci , Dale F. Riedy , Gustav E. Sittmann
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Cantor Colburn LLP
- 代理商 John Campbell
- 主分类号： G06F3/00
- IPC分类号： G06F3/00
摘要：
A computer program product, apparatus, and method are provided for determining a state of an input/output (I/O) operation in an I/O processing system. A request from a channel subsystem is received at a control unit for performing the I/O operation. After a predetermined amount of time passes without the I/O operation completing, an interrogation request is received from the channel subsystem at the control unit for determining the state of the I/O operation. A response is sent from the control unit to the channel subsystem indicating the state of the I/O operation in response to the interrogation request. The response also includes information regarding a state of an I/O device executing the I/O operation and information indicating a state of the control unit controlling the I/O device executing the I/O operation.
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