| 摘要 |
It is possible to suppress increase of the resources required for controlling an internal processor interrupt (cross call) for communication between CPUs of a computer system. A cross call transmission control unit (XCSC (40)) of an external interface unit of each CPU controls a cross call transmission issued by a CPU core (20) to another CPU. The XCSC (40) includes a register (41) for holding the processing state of the process relating to the cross call directly correlated with an issuance history of the cross call for each entry.
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