Mass storage cache in non volatile level of multi-level system memory

A machine readable storage medium containing program code that when processed by a computing system causes the system to perform a method, the method comprising:

• performing a write call on a buffer within a system memory having a non volatile region and a mass storage cache within the non volatile region, the performing of the write call comprising:
• executing a cache line flush instruction to direct any cache lines of the buffer within a processor level cache to a memory controller;
• executing a fence instruction to indicate that program execution shall not continue until the cache lines have been written to system memory;
• executing a commit instruction to commit the buffer's contents to the mass storage cache.

A computing system, comprising:

• one or more processing cores;
• a networking interface;
• a multi-level system memory;
• a memory controller comprising logic circuitry to implement a mass storage cache in a non volatile region of the multi-level system memory, the multi-level system memory to support execution of program code by way of cache line granularity accesses to the multi-level system memory.