FIELD: information technology.
SUBSTANCE: techniques and methods are used to reduce allocations to a higher level cache of cache lines displaced from a lower level cache. When it is determined that displaced lines have already been allocated on a higher level, the allocation of the displaced cache lines is prevented in the next level cache, thus, reducing displacements. To this end, 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. Allocation of the selected line in the higher level cache is prevented based on the identified information. Preventing allocation of the selected line saves power which would be associated with the allocation.
EFFECT: reducing power requirements in memory systems for mobile applications and reducing power requirements in processing systems.
20 cl, 3 dwg
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