Network congestion control method and device

Abstract

The embodiment of the invention discloses a network congestion control method and device, relates to the technical field of communication, and solves the problems that the RTT measured in the prior art is inaccurate, so that the congestion depth of a network queue cannot be effectively controlled, and the like. According to the specific scheme, the method is applied to first equipment, the first equipment is equipment for sending a data message, the first equipment sends the first message to second equipment, and the first message carries a first timestamp; the first timestamp is a local timestamp when the first message is sent; the first equipment receives a second message sent by the second equipment, wherein the second message carries the first timestamp; the first timestamp is subtracted from the second timestamp to obtain a first RTT; the sending rate of the data message is adjusted according to the first RTT, wherein the priority of the first message is the same as that of the data message, and the priority of the second message is higher than that of the data message.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a network congestion control method and device. Background technique [0002] At present, computers in the data center network can exchange data through Remote Direct Memory Access (RDMA), so that the network interface card (Network Interface Card, NIC) of the computer can read from the memory of another computer or send data to another computer through the network. A computer's memory writes data without the intervention of the computer's operating system. RDMA running on Ethernet is called RDMA over Converged Ethernet (RDMAover Converged Ethernet, RoCE) technology. [0003] In order to avoid the performance loss caused by network congestion and packet loss to RoCE, an existing flow control method calculates the round trip time (Round Trip Time, RTT) by measuring the round trip delay of a packet (64KB), and according to the round trip t...

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Problems solved by technology

[0004] However, the size of the data segment in this scheme is 64KB, and the size of the data block required by each request in the actual application is not fixed, so there is no guarantee of one ACK per 64KB. If the data block is small, there will be multiple data segments per 64KB ACK, using different ACK completion times to calculate RTT will affect the accuracy of RTT, so the RTT calculated by this scheme is inaccurate, resulting in that the congestion depth of the network queue cannot be effectively controlled; and the RTT measured by this scheme is affected by the reverse The impact of path congestion cannot accurately reflect whether there is congestion in the request direction or in the response direction, which may cause misjudgment by the control system

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