APPARATUS AND METHODS TO REDUCE DUPLICATE LINE FILLS IN A VICTIM CACHE
摘要
Techniques and methods are used to reduce allocations to a higher level cache of cache lines displaced from a lower level cache. The allocations of the displaced cache lines are prevented for displaced cache lines that are determined to be redundant in the next level cache, whereby castouts are reduced. To such ends, a line is selected to be displaced in a lower level cache. Information associated with the selected line is identified which indicates that the selected line is present in a higher level cache or the selected line is a write-through line. An allocation of the selected line in the higher level cache is prevented based on the identified information. Preventing an allocation of the selected line saves power that would be associated with the allocation.
申请公布号
WO2011103326(A3)
申请公布日期
2013.08.29
申请号
WO2011US25296
申请日期
2011.02.17
申请人
QUALCOMM INCORPORATED;SPEIER, THOMAS PHILIP;DIEFFENDERFER, JAMES NORRIS;SARTORIUS, THOMAS ANDREW
发明人
SPEIER, THOMAS PHILIP;DIEFFENDERFER, JAMES NORRIS;SARTORIUS, THOMAS ANDREW