Intel Corporation

Sharada Venkateswaran

Daniel W Liu

Nishant Singh

Sai Prashanth Muralidhara

Wei P Chen

Rajat Agarwal

Vedaraman Geetha

Bahaa Fahim

Samuel D Strom

Jeffrey Baxter

A system includes a multilevel memory such as a two level memory (2LM), where a first level memory acts as a cache for the second level memory. A memory controller or cache controller can detect a cache miss in the first level memory for a request for data. Instead of automatically performing a swap, the controller can determine whether to perform a swap based on a swap policy assigned to a memory region associated with the address of the requested data.

Selective fill for logical control over hardware multilevel memory

Technologies for memory mirroring across an interconnect are disclosed. In the illustrative embodiment, a primary memory agent that controls a single memory channel can implement memory mirroring by sending mirrored memory operations to a secondary memory agent over an interconnect. In the illustrative embodiment, the secondary memory agent may not be aware that it is performing mirrored memory operations. The primary memory agent may handle error recovery, scrubbing, and failover to the secondary memory agent.

Technologies for memory mirroring across an interconnect

A processor includes one or more cores having cache, a cache home agent (CHA), a near memory controller, to near memory, and a far memory controller, which is to: receive a first memory read operation from the CHA directed at a memory address; detect a miss for the first memory address at the near memory; issue a second memory read operation to the far memory controller to retrieve a cache line, having first data, from the memory address of far memory; receive the cache line from the far memory controller in response to the second memory read operation; and send the cache line to the CHA with a forced change to a directory state of the cache line at the CHA, the forced change to cause the CHA to snoop remote sockets to maintain data coherence for the cache line in an absence of directory state in the far memory.

Hybrid directory and snoopy-based coherency to reduce directory update overhead in two-level memory

Growing community of inventors

San Francisco, CA, United States of America

Sharada Venkateswaran