| 摘要 |
Provided is a computer including a physical computer that includes CPU's ( 1 a and 1 b), a memory ( 5 ), a PCI bus ( 7 ) for interconnecting I/O devices (# 0 to # 3 ), and a south bridge ( 6 ) for controlling the PCI bus ( 7 ), a hypervisor that divides the physical computer into a plurality of LPAR's and controls resource allocation of the physical computer, an I/O device allocation unit that sets a correlation between the I/O device and the plurality of LPAR's based on a command from the hypervisor, and a parallel process issuing unit that issues a processing request (for DMA transfer or interruption processing) received from the I/O device in parallel to the plurality of LPAR's set by the I/O device allocation unit. Thus, complexity of an on-board circuitry is prevented while dynamic changing of an I/O device of a virtual computer is enabled.
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