Technologies for enforcing coherence ordering in consumer polling interactions

One or more machine-readable storage media comprising a plurality of instructions stored thereon that, in response to being executed, cause a target computing device to:

• transmit, by a network interface controller (NIC) of the target computing device and subsequent to having received a network packet from another computing device, one or more write requests to a data storage device of the target computing device, wherein each of the one or more write requests is usable to initiate the storage of at least a portion of a payload of the received network packet to the data storage device;
• obtain, by the NIC and subsequent to having transmitted a last write request of the one or more write requests, ownership of a flag cache line of a plurality of cache lines in a cache of the target computing device, wherein a value of the flag cache line indicates whether the network packet has been written to the data storage device;
• receive, by the NIC, a snoop request from a processor of the target computing device;
• identify, by the NIC, whether the received snoop request corresponds to a read flag snoop request associated with an active request being processed by the NIC;
• hold, by the NIC and in response to having identified the received snoop request as the read flag snoop request, the received snoop request for delayed return;
• determine, by the NIC, whether each of the one or more write requests has returned successfully;
• update, by the NIC and subsequent to having determined that each of the one or more write requests has returned successfully, the value of the flag cache line to indicate the payload has been written to the data storage device;
• and
• issue, by the NIC and subsequent to having updated the value of the flag cache line, a response to the processor responding to the received snoop request.

A method for enforcing coherence ordering in consumer polling interactions, the method comprising:

• transmitting, by a network interface controller (NIC) of a target computing device, upon having received a network packet, one or more write requests to a data storage device of the target computing device, wherein each of the one or more write requests is usable to initiate the storage of at least a portion of a payload of the received network packet to the data storage device;
• obtaining, by the NIC and subsequent to having transmitted a last write request of the one or more write requests, ownership of a flag cache line of a plurality of cache lines in a cache of the target computing device, wherein a value of the flag cache line indicates whether the network packet has been written to the data storage device;
• receiving, by the NIC, a snoop request from a processor of the one or more processors;
• identifying, by the NIC, whether the received snoop request corresponds to a read flag snoop request associated with an active request being processed by the NIC,
• holding, by the NIC and in response to having identified the received snoop request as the read flag snoop request, the received snoop request for delayed return;
• determining, by the NIC, whether each of the one or more write requests has returned successfully;
• updating, by the NIC and subsequent to having determined that each of the one or more write requests has returned successfully, the value of the flag cache line to indicate the payload has been written to the data storage device;
• and
• issuing, by the NIC and subsequent to having updated the value of the flag cache line, a response to the processor responding to the received snoop request.