Method and device for controlling congestion in host based on RDMA (Remote Direct Memory Access)

The invention provides an in-host congestion control method and device based on RDMA (Remote Direct Memory Access), and the method is executed at a transmitting end of a remote direct memory access network, and the transmitting end timely obtains an in-host flow congestion signal transmitted by a receiving end through a periodic detection packet and a returned detection confirmation packet. Obtaining the current receiving end delay through the timestamps of the periodic detection packet and the returned detection confirmation packet, and calculating the receiving rate of the current receiving end according to the current receiving end delay, the receiving end delay at the previous moment, the target delay and the receiving rate of the receiving end at the previous moment; comparing the current receiving rate with an alternative sending rate calculated based on a preset congestion control algorithm to obtain a target sending rate needing to be adjusted under the current congestion condition; and meanwhile, the