Generating approximate usage measurements for shared cache memory systems

A shared cache memory system, comprising:

• a means for associating each cache subdivision of a plurality of cache subdivisions of the shared cache memory system with a Quality of Service (QoS) class of a plurality of QoS classes;
• a means for receiving a memory access request comprising a QoS identifier (QoSID);
• a means for accessing a cache subdivision corresponding to the memory access request among the plurality of cache subdivisions;
• a means for determining whether the QoSID of the memory access request corresponds to the QoS class plurality of QoS classes associated with the cache subdivision;
• a means for updating a QoSID tracking tag of a plurality of QoSID tracking tags associated with the cache subdivision corresponding to the memory access request based on the means for determining;
• and
• a means for generating an approximate usage measurement for the QoS class of the plurality of QoS classes based on the plurality of QoSID tracking tags.

A method for approximating shared cache memory usage, comprising:

• associating each cache subdivision of a plurality of cache subdivisions of a shared cache memory system with a Quality of Service (QoS) class of a plurality of QoS classes;
• receiving a memory access request comprising a QoS identifier (QoSID);
• accessing a cache subdivision corresponding to the memory access request among the plurality of cache subdivisions;
• determining whether the QoSID of the memory access request corresponds to the QoS class of the plurality of QoS classes associated with the cache subdivision;
• updating a QoSID tracking tag of a plurality of QoSID tracking tags associated with the cache subdivision corresponding to the memory access request based on the determining;
• and
• generating an approximate usage measurement for the QoS class of the plurality of QoS classes based on the plurality of QoSID tracking tags.