Allocating physical pages to sparse data sets in virtual memory without page faulting

An apparatus comprising:

• a first memory to store a dataset;
• a second memory to store a subset of the dataset;
• and
• a processing unit configured to:
• receive a memory access request including a virtual address;
• map a first physical page in a free page pool of the second memory to the virtual address in response to the virtual address not being mapped to a second physical page in the second memory;
• and
• grant the memory access request to the first physical page.

An apparatus comprising:

• a processing unit;
• a first memory to store a dataset, wherein the first memory has a first latency to memory access requests from the processing unit;
• and
• a second memory to store a sparse subset of the dataset, wherein the second memory has a second latency to memory access requests from the processing unit, and wherein the second latency is shorter than the first latency, and
• wherein the processing unit is configured to:
• receive a memory access request including a virtual address;
• map a first physical page in a free page pool of the second memory to the virtual address in response to the virtual address not being mapped to a second physical page in the second memory;
• and
• grant the memory access request to the second physical page that is mapped to the virtual address.