Low overhead send/receive data delivery into user memory

A method for managing a computing network implementing packet delivery contexts (PDCs), the method comprising:

• receiving a data packet;
• using a match table to match a concatenation of a source address of the data packet and a consecutive message sequence number (MSN) to a match data structure;
• inserting, by a semantic layer, the matched concatenation into the match data structure based on a source and a running counter for a MSN to each source;
• attaching, by a NIC, a currently active PDC associated with the source, or atomically creating and attaching an empty PDC;
• in response to a packet arriving before the semantic layer has posted a recv( ) atomically inserting a canary value “failed match” into the match data structure and sending a request to wait (RTW) message to the source;
• and
• in response to the semantic layer posting the recv( ):
• identifying, by the semantic layer, the “failed match” entry in the match data structure,
• atomically updating the “failed match” entry with match information, and sending a request to send (RTS) message to the source.

A system for managing a computing network implementing packet delivery contexts (PDCs), the system comprising a network device and computing node, the system configured to perform operations comprising:

• receiving a data packet;
• using a match table to match a concatenation of a source address of the data packet and a consecutive message sequence number (MSN) to a match data structure;
• inserting, by a semantic layer, the matched concatenation into the match data structure based on a source and a running counter for a MSN to each source;
• attaching, by a NIC, a currently active PDC associated with the source, or atomically creating and attaching an empty PDC;
• in response to a packet arriving before the semantic layer has posted a recv( ) atomically inserting a canary value “failed match” into the match data structure and sending a request to wait (RTW) message to the source;
• and
• in response to the semantic layer posting the recv( )
• identifying, by the semantic layer, the “failed match” entry in the match data structure,
• atomically updating the “failed match” entry with match information, and sending a request to send (RTS) message to the source.