| 摘要 |
A cache subsystem apparatus and method of operating therefor is disclosed. In one embodiment, a cache subsystem includes a cache memory divided into a plurality of sectors each having a corresponding plurality of cache lines. Each of the plurality of sectors is associated with a sector dirty bit that, when set, indicates at least one of its corresponding plurality of cache lines is storing modified data of any other location in a memory hierarchy including the cache memory. The cache subsystem further includes a cache controller configured to, responsive to initiation of a power down procedure, determine only in sectors having a corresponding sector dirty bit set which of the corresponding plurality of cache lines is storing modified data. |
