Receiver sliding window-based data transmission method in parallel computer system

Abstract

The invention discloses a receiver sliding window-based data transmission method in a parallel computer system, and aims at guaranteeing the integrity and the correctness of out-of-order and unreliable network-based RDMA (remote direct memory access) transmission data in the design of the existing parallel computer system. The technical scheme is that the data transmission method comprises the following steps of: firstly, establishing connection between a sending node and a receiving node; setting up a receiving window at the receiving window, wherein the receiving window is only used for recording and receiving the numbers of RDMA messages nor performing caching on RDMA messages entering the receiving window; sending the RDMA messages to the receiving node by the sending node and responding retransmission request messages sent back by the receiving node; meanwhile, receiving the RDMA messages, of which the message numbers are located in the receiving window, by the receiving node, and writing data in the RDMA messages in internal storage of the receiving node; receiving the RDMA messages, sent by the receiving node, by the sending node to finish message response, and ending the RDMA transmission by the sending node. Compared with the existing method, the receiver sliding window-based data transmission method disclosed by the invention has the advantages that the hardware resource cost can be reduced, the retransmission cost is reduced, and the transmission efficiency is improved.

Description

technical field [0001] The invention relates to a method for moving memory data between two computing nodes in a parallel computer system, in particular to a data transmission method between computing nodes based on a receiver sliding window based on an out-of-order and unreliable network. Background technique [0002] A parallel computer system is usually composed of multiple computing nodes (abbreviated as nodes) and an interconnection network. The nodes are composed of processors, network interfaces and memory. communication. In a parallel computer system, a basic communication mode is to copy data in the memory between two nodes (denoted as sending node and receiving node), that is, the sending node writes the data in the memory area of ​​the node to the receiving node This mode of communication is often called Remote Direct Memory Access (RDMA). [0003] RDMA communication needs to rely on the interconnection network of parallel computers to complete. Generally speaki...

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is: in the RDMA transmission process based on the out-of-order and unreliable network in the existing parallel computer system design, it is necessary to ensure the integrity and correctness of the transmitted data, and at the same time ensure that the data transmission performance is better, while the existing method There are problems that easily cause network congestion, high hardware overhead, and high retransmission overhead

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