Systems, devices, and methods for network congestion control

Abstract

Some embodiments described herein provide a method for reducing congestion in a network using per-hop telemetry data and network adapters implementing such a method. As compared to conventional congestion control mechanisms, the method may include sharing telemetry data between flows on a per-hop basis to accelerate the convergence of congestion control efforts in a multi-flow network environment. In some embodiments, a destination network adapter may be configured to generate a response packet that includes all of the telemetry data for a packet without combining it, such that the response packet includes distinct telemetry data for each hop in the flow. A sender network adapter may be configured to parse the telemetry data in the response packet to determine the queue length and the link utilization for each hop in the flow through the network, which it then uses to determine a hop rate for each hop in the flow.