SYSTEM AND METHOD FOR MANAGING CACHE REPLACEMENTS

摘要

A system and method for managing cache replacements and a memory subsystem incorporating the system or the method. In one embodiment, the system includes: (1) a cache controller operable to control a cache and, in order: (1a) issue a pre-fetch command when the cache has a cache miss, (1b) perform at least one housekeeping task to ensure that the cache can store a replacement line and (1c) issue a fetch command and (2) a memory controller associated with a memory of a lower level than the cache and operable to respond to the pre-fetch command by performing at least one housekeeping task to ensure that the memory can provide the replacement line and respond to the fetch command by providing the replacement line.

主权项

1. A system for managing cache replacements, comprising:
a cache controller operable to control a cache and, in order:
issue a pre-fetch command when said cache has a cache miss,perform at least one housekeeping task to ensure that said cache can store a replacement line, andissue a fetch command; and a memory controller associated with a memory of a lower level than said cache and operable to respond to said pre-fetch command by performing at least one housekeeping task to ensure that said memory can provide said replacement line and respond to said fetch command by providing said replacement line.