| 摘要 |
A cache control apparatus determines whether to adopt or not data acquired by a speculative fetch by monitoring a status of the speculative fetch which is a memory fetch request output before it becomes clear whether data requested by a CPU is stored in a cache of the CPU and time period obtained by adding up the time period from when the speculative fetch is output to when the speculative fetch reaches a memory controller and time period from completion of writing of data to a memory which is specified by a data write command that has been issued, before issuance of the speculative fetch, for the same address as that for which the speculative fetch is issued to when a response of the data write command is returned.
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