High performance interconnect coherence protocol

Abstract

A request is received that is to reference a first agent and to request a particular line of memory to be cached in an exclusive state. A snoop request is sent intended for one or more other agents. A snoop response is received that is to reference a second agent, the snoop response to include a writeback to memory of a modified cache line that is to correspond to the particular line of memory. A complete is sent to be addressed to the first agent, wherein the complete is to include data of the particular line of memory based on the writeback.

Description

FIELD[0001]The present disclosure relates in general to the field of computer development, and more specifically, to software development involving coordination of mutually-dependent constrained systems.BACKGROUND[0002]Advances in semi-conductor processing and logic design have permitted an increase in the amount of logic that may be present on integrated circuit devices. As a corollary, computer system configurations have evolved from a single or multiple integrated circuits in a system to multiple cores, multiple hardware threads, and multiple logical processors present on individual integrated circuits, as well as other interfaces integrated within such processors. A processor or integrated circuit typically comprises a single physical processor die, where the processor die may include any number of cores, hardware threads, logical processors, interfaces, memory, controller hubs, etc.[0003]As a result of the greater ability to fit more processing power in smaller packages, smalle...

AI Technical Summary

Benefits of technology

The patent text describes a system that uses a serial point-to-point interconnect to connect input / output devices in a computer system. The system includes a simplified block diagram for illustration purposes. The technical effect of the patent text is to provide a reliable and efficient way to connect multiple devices in a computer system using a simple and flexible interconnect technology.

Problems solved by technology

However, these smaller devices are reliant on servers both for data storage and complex processing that exceeds the form factor.

But as the processing power grows along with the number of devices in a computing system, the communication between sockets and other devices becomes more critical.

Unfortunately, as the demand for future processors to consume at even higher-rates corresponding demand is placed on the capabilities of existing interconnect architectures.

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