Receiver-based precision congestion control

A method implemented using an integrated circuit, the integrated circuit to be used in association with ternary content-addressable memory (TCAM) in a network switch, the network switch being configurable for use in a network that comprises multiple server nodes and multiple switch nodes, the multiple server nodes comprising at least one server node and at least one other server node, the multiple switch nodes comprising at least one switch node and at least one other switch node, the network switch to be comprised in the at least one switch node, the integrated circuit comprising packet processing pipeline circuitry configurable to implement ingress and egress pipelines, and traffic manager circuitry, the ingress and egress pipelines comprising at least one parser stage, multiple match-action stages, and at least one other stage, the method comprising:

• parsing, by the at least one parser stage, packet header data;
• matching, by the multiple match-action stages, parsed header field data with at least one portion of table data stored, at least in part, in the TCAM to determine packet processing action data associated with the parsed header field data;
• queuing, by the traffic manager circuitry, ingress pipeline processed packet data for use by at least one egress pipeline;
• and
• generating, by the at least one other stage, output packet data for output from the integrated circuit;
• wherein:
• the integrated circuit is to generate telemetry-related information for use in determining packet flow transmit-rate information for at least one packet flow transmitted from the at least one server node in the network;
• the packet flow transmit-rate information is to be used by the at least one server node to adjust flow-rate of the at least one packet flow from the at least one server node in the network;
• the telemetry-related information is to be accumulated, with other telemetry-related information from the at least one other switch node, to generate accumulated telemetry-related information;
• the accumulated telemetry-related information is (1) to be provided to the at least one other server node and (2) for use in generating the packet flow transmit-rate information by the at least one other server node;
• the accumulated telemetry-related information comprises:
• timestamp information of the at least one switch node and the at least one other switch node;
• queue depth information of the at least one switch node and the at least one other switch node;
• and
• bytes transmitted information of the at least one switch node and the at least one other switch node;
• and
• the flow-rate of the at least one packet flow from the at least one server node in the network is to be adjusted, based upon the packet flow transmit-rate information, in association with implementing network congestion control associated with the at least one packet flow.

At least one non-transitory machine-readable storage medium storing instructions for being executed by at least one machine that is associated with an integrated circuit, the integrated circuit to be used in association with ternary content-addressable memory (TCAM) in a network switch, the network switch being configurable for use in a network that comprises multiple server nodes and multiple switch nodes, the multiple server nodes comprising at least one server node and at least one other server node, the multiple switch nodes comprising at least one switch node and at least one other switch node, the network switch to be comprised in the at least one switch node, the integrated circuit comprising packet processing pipeline circuitry configurable to implement ingress and egress pipelines, and traffic manager circuitry, the ingress and egress pipelines comprising at least one parser stage, multiple match-action stages, and at least one other stage, the instructions, when executed by the at least one machine, resulting in performance of operations comprising:

• parsing, by the at least one parser stage, packet header data;
• matching, by the multiple match-action stages, parsed header field data with at least one portion of table data stored, at least in part, in the TCAM to determine packet processing action data associated with the parsed header field data;
• queuing, by the traffic manager circuitry, ingress pipeline processed packet data for use by at least one egress pipeline;
• and
• generating, by the at least one other stage, output packet data for output from the integrated circuit;
• wherein:
• the integrated circuit is to generate telemetry-related information for use in determining packet flow transmit-rate information for at least one packet flow transmitted from the at least one server node in the network;
• the packet flow transmit-rate information is to be used by the at least one server node to adjust flow-rate of the at least one packet flow from the at least one server node in the network;
• the telemetry-related information is to be accumulated, with other telemetry-related information from the at least one other switch node, to generate accumulated telemetry-related information;
• the accumulated telemetry-related information is (1) to be provided to the at least one other server node and (2) for use in generating the packet flow transmit-rate information by the at least one other server node;
• the accumulated telemetry-related information comprises:
• timestamp information of the at least one switch node and the at least one other switch node;
• queue depth information of the at least one switch node and the at least one other switch node;
• and
• bytes transmitted information of the at least one switch node and the at least one other switch node;
• and
• the flow-rate of the at least one packet flow from the at least one server node in the network is to be adjusted, based upon the packet flow transmit-rate information, in association with implementing network congestion control associated with the at least one packet flow.

A network switch configurable for use in a network that comprises multiple server nodes and multiple switch nodes, the multiple server nodes comprising at least one server node and at least one other server node, multiple switch nodes comprising at least one switch node and at least one other switch node, the network switch to be comprised in the at least one switch node, the network switch comprising:

• ports;
• and
• an integrated circuit for use in association with ternary content-addressable memory (TCAM), the integrated circuit to be communicatively coupled to the network via the ports, the integrated circuit comprising:
• packet processing pipeline circuitry configurable to implement ingress and egress pipelines, the ingress and egress pipelines comprising at least one parser stage, multiple match-action stages, and at least one other stage, the at least one parser stage to parse packet header data, the multiple match-action stages to match parsed header field data with at least one portion of table data stored, at least in part, in the TCAM to determine packet processing action data associated with the parsed header field data, the at least one other stage to generate output packet data for output from the integrated circuit;
• and
• traffic manager circuitry to queue ingress pipeline processed packet data for use by at least one egress pipeline;
• wherein:
• the integrated circuit is to generate telemetry-related information for use in determining packet flow transmit-rate information for at least one packet flow transmitted from the at least one server node in the network;
• the packet flow transmit-rate information is to be used by the at least one server node to adjust flow-rate of the at least one packet flow from the at least one server node in the network;
• the telemetry-related information is to be accumulated, with other telemetry-related information from the at least one other switch node, to generate accumulated telemetry-related information;
• the accumulated telemetry-related information is (1) to be provided to the at least one other server node and (2) for use in generating the packet flow transmit-rate information by the at least one other server node;
• the accumulated telemetry-related information comprises:
• timestamp information of the at least one switch node and the at least one other switch node;
• queue depth information of the at least one switch node and the at least one other switch node;
• and
• bytes transmitted information of the at least one switch node and the at least one other switch node;
• and
• the flow-rate of the at least one packet flow from the at least one server node in the network is to be adjusted, based upon the packet flow transmit-rate information, in association with implementing network congestion control associated with the at least one packet flow.

A data center comprising:

• a network comprising multiple server nodes and multiple switch nodes, the multiple server nodes comprising at least one server node and at least one other server node, multiple switch nodes comprising at least one switch node and at least one other switch node, a network switch to be comprised in the at least one switch node, the network switch comprising:
• ports;
• and
• an integrated circuit for use in association with ternary content-addressable memory (TCAM), the integrated circuit to be communicatively coupled to the network via the ports, the integrated circuit comprising:
• packet processing pipeline circuitry configurable to implement ingress and egress pipelines, the ingress and egress pipelines comprising at least one parser stage, multiple match-action stages, and at least one other stage, the at least one parser stage to parse packet header data, the multiple match-action stages to match parsed header field data with at least one portion of table data stored, at least in part, in the TCAM to determine packet processing action data associated with the parsed header field data, the at least one other stage to generate output packet data for output from the integrated circuit;
• and
• traffic manager circuitry to queue ingress pipeline processed packet data for use by at least one egress pipeline;
• wherein:
• the at least one server node is to transmit at least one packet flow in the network;
• the integrated circuit is to generate telemetry-related information for use in determining packet flow transmit-rate information for the at least one packet flow that is to be transmitted from the at least one server node in the network;
• the at least one server node is to adjust, based upon the packet flow transmit-rate information, flow-rate of the at least one packet flow from the at least one server node in the network;
• the telemetry-related information is to be accumulated, with other telemetry-related information from the at least one other switch node, to generate accumulated telemetry-related information;
• the at least one other server node is (1) to receive the accumulated telemetry-related information and (2) to generate, based upon the accumulated telemetry-related information, the packet flow transmit-rate information;
• the accumulated telemetry-related information comprises:
• timestamp information of the at least one switch node and the at least one other switch node;
• queue depth information of the at least one switch node and the at least one other switch node;
• and
• bytes transmitted information of the at least one switch node and the at least one other switch node;
• and
• the at least one server node is to adjust the flow-rate of the at least one packet flow from the at least one server node, based upon the packet flow transmit-rate information, in association with implementing network congestion control associated with the at least one packet flow.

At least one server node to be comprised in a network comprising multiple server nodes and multiple switch nodes, the multiple server nodes comprising the at least one server node and at least one other server node, multiple switch nodes comprising at least one switch node and at least one other switch node, a network switch to be comprised in the at least one switch node, the at least one server node comprising:

• ports to communicatively couple the at least one server node to the network;
• and
• processing circuitry to generate, based upon accumulated telemetry-related information, packet flow transmit-rate information;
• wherein:
• the network switch comprises an integrated circuit for use in association with ternary content-addressable memory (TCAM);
• the integrated circuit comprises:
• packet processing pipeline circuitry configurable to implement ingress and egress pipelines, the ingress and egress pipelines comprising at least one parser stage, multiple match-action stages, and at least one other stage, the at least one parser stage to parse packet header data, the multiple match-action stages to match parsed header field data with at least one portion of table data stored, at least in part, in the TCAM to determine packet processing action data associated with the parsed header field data, the at least one other stage to generate output packet data for output from the integrated circuit;
• and
• traffic manager circuitry to queue ingress pipeline processed packet data for use by at least one egress pipeline;
• the at least one other server node is to transmit at least one packet flow in the network;
• the integrated circuit is to generate telemetry-related information for use in determining the packet flow transmit-rate information for the at least one packet flow that is to be transmitted from the at least one other server node in the network;
• the at least one other server node is to adjust, based upon the packet flow transmit-rate information, flow-rate of the at least one packet flow from the at least one other server node in the network;
• the accumulated telemetry-related information comprises:
• timestamp information of the at least one switch node and the at least one other switch node;
• queue depth information of the at least one switch node and the at least one other switch node;
• and
• bytes transmitted information of the at least one switch node and the at least one other switch node;
• and
• the at least one other server node is to adjust the flow-rate of the at least one packet flow from the at least one other server node, based upon the packet flow transmit-rate information, in association with implementing network congestion control associated with the at least one packet flow.