Heterogeneous unified memory

A computer-implemented method for managing an extended unified memory space across a plurality of physical heterogeneous memory modules, the method comprising:

• receiving, by a cold page reclamation logic section, an evicted cold page from a system memory;
• assigning, by the cold page reclamation logic section, a priority to the evicted cold page;
• selecting, by an intelligent page sort logic section, one of a first pool of memory modules from among the plurality of physical heterogeneous memory modules or a second pool of memory modules from among the plurality of physical heterogeneous memory modules based at least on a first set of characteristics of the first pool of memory modules and a second set of characteristics of the second pool of memory modules, and based at least on the assigned priority of the evicted cold page;
• and
• selecting a target module from among the selected pool of memory modules.

A computer-implemented method for managing an extended unified memory space across a plurality of physical heterogeneous memory modules, the method comprising:

• managing an extended unified memory space across a plurality of physical heterogeneous memory modules;
• receiving a target read page from a system memory;
• determining, by an intelligent page sort logic section, whether the target read page corresponds to an anon-type memory page or a file-type memory page;
• in response to determining that the target read page corresponds to the anon-type memory page:
• retrieving a page table;
• determining whether the anon-type memory page is located in a system memory or in the extended unified memory space based on the page table;
• and
• in response to determining that the anon-type memory page is located in the extended unified memory space, transferring the anon-type memory page from the extended unified memory space to the system memory;
• in response to determining that the target read page corresponds to the file-type memory page:
• retrieving a file address space;
• determining whether the file-type memory page is located in the system memory or in the extended unified memory space based on the retrieved file address space;
• and
• in response to determining that the file-type memory page is located in the extended unified memory space, transferring the file-type memory page from the extended unified memory space to the system memory.