Ring controller for PCIe message handling

A method, comprising:

• receiving, by a node in a switched fabric hierarchy, a posted transaction representing a message;
• determining, by the node, a type for the message, wherein the determined type is one of a plurality of message types supported by the switched fabric hierarchy;
• storing, by the node, information about the message in a data structure that stores information about messages of the determined type;
• retrieving, by the node subsequent to storing the information about the message in the data structure, the information about the message;
• and
• processing, by the node, the message.

A system, comprising:

• a computing node configured as a root complex component in a switched fabric hierarchy;
• two or more computing nodes configured as endpoints in the switched fabric hierarchy;
• a network switch for the switched fabric network that connects the root complex component and the endpoints to each other;
• and
• a memory;
• wherein at least one of the two or more computing nodes configured as endpoints or the computing node configured as a root complex component comprises a ring controller;
• and
• wherein the ring controller is configured to:
• receive a posted transaction representing a message;
• determine a type for the message, wherein the determined type is one of a plurality of message types supported by the switched fabric hierarchy;
• and
• store information about the message in a data structure that stores information about messages of the determined type, wherein the data structure resides in the memory;
• and
• wherein, subsequent to the information about the message being stored in the data structure, the at least one of the computing nodes is configured to:
• retrieve the information about the message from the data structure;
• and
• process the message.