Method and apparatus to use dram as a cache for slow byte-addressible memory for efficient cloud applications

A non-transitory computer-readable storage medium comprising instructions that when executed by a processor of a computing device, cause the processor to:

• identify a first guest memory page based at least in part on a number of accesses to a page table entry for the first guest memory page by an application executing in a virtual machine (VM) on the processor, the first guest memory page in a byte-addressable persistent memory (PMEM) of the computing device;
• pause execution of the VM and the application on the processor;
• and
• migrate the first guest memory page to a target memory page in a dynamic random access memory (DRAM) of the computing device, the target memory page comprising one of a target host memory page and a target guest memory page, the DRAM having an access speed faster than an access speed of the PMEM.

A method, comprising:

• identifying a first guest memory page based at least in part on a number of accesses to a page table entry for the first guest memory page by an application executing in a virtual machine (VM) on the processor, the first guest memory page in a byte-addressable persistent memory (PMEM);
• pausing execution of the VM and the application on the processor;
• and
• migrating the first guest memory page to a target memory page in a dynamic random access memory (DRAM), the target memory page comprising one of a target host memory page and a target guest memory page, the DRAM having an access speed faster than an access speed of the PMEM.