System and a method for data processing with management of a cache consistency in a network of processors with cache memories

A method for data processing with management of a cache consistency in a network of processors including cache memories, the network including a main memory shared between the processors and a plurality of nodes for access to the main memory interconnected with one another, the method comprising:

• generation of directories distributed between the nodes of the network, each directory comprising a table of correspondence between cache lines and information fields on the cache lines;
• transmission of messages in a first sub-network for a first physical interconnection of nodes with one another implementing a first message transmission protocol, the first protocol providing read/write access to the correspondence tables of the directories during any passage, in the corresponding nodes, of a message passing through the first sub-network;
• transmission of messages in a second sub-network for a second physical interconnection of nodes with one another, separate from the first sub-network, implementing a second message transmission protocol, different from the first transmission protocol, the second protocol excluding any read/write access to the correspondence tables of the directories during any passage in the corresponding nodes of a message passing through the second sub-network.