Method and apparatus for managing write back cache

Granted: March 16, 2006
Application Number: 20060059316
A network services processor includes an input/output bridge that avoids unnecessary updates to memory when cache blocks storing processed packet data are no longer required. The input/output bridge monitors requests to free buffers in memory received from cores and 10 units in the network services processor. Instead of writing the cache block back to the buffer in memory that will be freed, the input/output bridge issues don't write back commands to a cache controller to clear the dirty…