Method and system for conducting consistency processing on caches with catalogues of far-end agent

Abstract

The invention discloses a method and system for conducting consistency processing on caches with catalogues of a far-end agent. The far-end agent is made to obtain and process a local request initiated by a local request source; a response message and data are returned to the local request source when the response message and data from the far-end agent are received, and corresponding catalogues and data are written into a catalogue cache and a data cache respectively; whether other target requests with the same address as that of the far-end agent exist or not is judged; if yes, the target requests are processed in sequence; starting from the moment when the local request is sent to the far-end agent to occupy one catalogue and one data cache till the response message of the request returns, if a request of the same address as that of the far-end agent and meeting a certain condition or a monitoring message enters the far-end agent within the time before the internal cache resources in the far-end agent is invalid, the request can be directly processed in the far-end agent, message flow in reduced, a response is conducted quickly, across-node operation is not needed, and expense is reduced.

Description

technical field [0001] The invention relates to the field of computer architecture, in particular to a method and a system for processing cache consistency with a directory of a remote agent. Background technique [0002] A multi-channel server system based on a coherent interconnection chip needs to maintain data cache consistency during the implementation process. In the process of implementing the current cache coherence protocol, the local proxy and the remote proxy act as the main body of proxying remote requests and local requests respectively, and are the two main parts of the coherence chip protocol processing. [0003] In order to reduce interception messages in the intermediate process and speed up the response speed of the system, both the remote agent and the local agent can use the "directory" method to record the data status of the CacheLine cache line. However, as the multi-way server system manages more and more physical storage resources, the storage resour...

AI Technical Summary

Problems solved by technology

However, with the multi-channel server system, the managed physical storage resources are getting larger and larger, and the storage resource overhead of the "directory" method is also increasing, especially on the remote agent side of the multi-channel system.

Balanced considerations, in the process of implementation, the remote agent has no "directory" and the local agent adopts a full "directory". There is a lack of a cache consistency processing method with a remote agent with a directory that is less expensive.

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