Cache for storing regions of data

A method, comprising:

• receiving a plurality of memory access requests comprising request addresses;
• maintaining an identification of a first region of contiguous data in a system memory that has a copy of the contiguous data stored in a second region of a cache, wherein:
• the cache and the system memory are at different hierarchical levels of a memory subsystem;
• and
• the first region represents a range of addresses and the identification comprises:
• a first start address pointing to a memory location storing data at a beginning of the first region;
• and
• a size of the second region;
• and
• selecting a first memory access request of the received plurality of memory access requests;
• comparing a first request address of the first memory access request to each of the first start address and a sum of the first start address and the size of the second region to determine whether the cache stores requested data of the first memory access request;
• sending the first memory access request to the system memory, in response to determining the first request address is not within the range of addresses;
• and
• servicing the first memory access request by accessing data from the cache, in response to determining the first request address is within the range of addresses.

A non-transitory computer readable storage medium storing program instructions, wherein the program instructions are executable by a processor to:

• receive a plurality of memory access requests comprising request addresses;
• maintain an identification of a first region of contiguous data in a system memory that has a copy of the contiguous data stored in a second region of a cache, wherein:
• the cache and the system memory are at different hierarchical levels of a memory subsystem;
• and
• the first region represents a range of addresses and the identification comprises:
• a first start address pointing to a memory location storing data at a beginning of the first region;
• and
• a size of the second region;
• and
• select a first memory access request of the received plurality of memory access requests;
• compare a first request address of the first memory access request to each of the first start address and a sum of the first start address and the size of the second region to determine whether the cache stores requested data of the first memory access request;
• send the first memory access request to the system memory, in response to determining the first request address is not within the range of addresses;
• and
• service the first memory access request by accessing data from the cache, in response to determining the first request address is within the range of addresses.