| 摘要 |
A cache system includes a tag memory having a tag indicating whether data is obtained by prefetch access, a prefetch reliability storage unit having prefetch reliability of each processor, and a tag comparator configured to compare the tag with an access address, instruct the prefetch reliability storage unit to decrease the prefetch reliability if cache miss occurs for the tag indicating the prefetch access, and erase information indicating the prefetch access and instruct the prefetch reliability storage unit to increase the prefetch reliability if cache hit occurs for the tag indicating the prefetch access.
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