US 11,531,620 B2 · Distributed virtual memory management for data processing network

Abstract

A data processing network includes request nodes with local memories accessible as a distributed virtual memory (DVM) and coupled by an interconnect fabric. Multiple DVM domains are assigned, each containing a DVM node for handling DVM operation requests from request nodes in the domain. On receipt of a request, a DVM node sends a snoop message to other request nodes in its domain and sends a snoop message to one or more peer DVM nodes in other DVM domains. The DVM node receives snoop responses from the request nodes and from the one or more peer DVM nodes, and send a completion message to the first request node. Each peer DVM node sends snoop messages to the request nodes in its domain, collects snoop responses, and sends a single response to the originating DVM node. In this way, DVM operations are performed in parallel.

Claims20

Dependent claims

A method for managing distributed virtual memory (DVM) in a data processing network having a plurality of request nodes and a plurality of DVM nodes, the distributed virtual memory associated with local memories of the plurality of request nodes, the method comprising:

assigning a plurality of DVM domains, each DVM domain including a DVM node of the plurality of DVM nodes and one or more request nodes of the plurality of request nodes, the plurality of DVM nodes including a first DVM node in a first DVM domain;
sending, by a first request node in the first DVM domain to the first DVM node, a DVM message to request a DVM operation;
the first DVM node, responsive to receiving the DVM message:
sending a snoop message to request nodes, other than the first request node, in the first DVM domain;
sending snoop messages to peer DVM nodes in DVM domains other than the first DVM domain;
and
sending a completion message to the first request node in response to receiving snoop responses from the request nodes, other than the first request node, in the first DVM domain and receiving a snoop response from each peer DVM node.

4 more elements

A data processing network comprising:

a plurality of request nodes, each request node including a local memory, the local memories of the plurality of request nodes accessible as a distributed virtual memory (DVM);
a plurality of DVM nodes, where the local memory of a request node is accessible by other request nodes via one or more DVM nodes of the plurality of DVM nodes;
assignment logic configured to assign one or more request nodes of the plurality of request nodes to each DVM node of the plurality of DVM nodes to form a DVM domain for each DVM node;
and
an interconnect fabric operatively coupling the one or more request nodes in a DVM domain to the DVM node in the DVM domain and operatively coupling between the DVM nodes,
where a first request node in a first DVM domain is configured to send a DVM message to the DVM node of the first DVM domain to request a DVM operation, and
where the DVM node of the first DVM domain is configured to:
send a snoop message to request nodes, other than the first request node, in the first DVM domain in response to receiving the DVM message from the first request node;
send a snoop message to one or more peer DVM nodes in DVM domains other than the first DVM domain in response to receiving the DVM message from the first request node;
and
send a completion message to the first request node in response to receiving snoop responses from the request nodes, other than the first request node, in the first DVM domain, and receiving snoop responses from the one or more peer DVM nodes.

8 more elements

Dependencies are inferred from the claim text.

Distributed virtual memory management for data processing network

Life of this patent

Distributed virtual memory management for data processing network

Life of this patent

Abstract

Claims20