| 摘要 |
PURPOSE:To enable a spurious fault to be reset at an optional time in the process of a retrying process, and a detailed evaluation of the retrying process, by permitting the designation of the generating number of times of the spurious fault. CONSTITUTION:The program executes an expanded decor instruction based on a physical channel exceptional data. A spurious fault setting data is embedded in a firmware within an input/output control device 4 by the instruction, and simultaneously, a spurious fault generation counter 41 is zero-cleared, but in the state, a physical channel exception is not generated. Afterwards, when a control is handed to an operating system, and a channel command is executed for the data write request from another application job to a peripheral device 61 at an access bus, the value of the spurious fault generation counter 41 is compared with the designated number of times of the generation of the spurious fault, and when they coincide, no spurious fault is generated, and an input/output operation is terminated normally. |
