Multi-CPU communication method and system

Abstract

The present invention discloses a multi-CPU communication method and a system thereof. The method is achieved through PCI Express bus equipment, which includes: a. a source CPU and a target CPU respectively carry out the initial configuration of the NT bridge of PCI Express bus equipment on the side and then step b is carried out after the initial configuration on any side is completed; b. the CPU on the side where the initial configuration is completed starts the periodic test for the connection of PCI Express bus between the source CPU and the target CPU; the source CPU needs to send data messages to the target CPU; if the connection is normal, the periodic test ends to enter step c and if the connection is interrupted, the periodic test continues; c. the source CPU sends data messages to the target CPU according to the initial configuration of the NT bridge; d. the target CPU receives the data messages. The technical proposal of the present invention achieves the high-speed communication among multiple CPUs.

Description

technical field [0001] The invention relates to the communication field, in particular to a multi-CPU communication method and system. Background technique [0002] With the development of hardware, the hardware integration of communication products is increasing. A single communication board can integrate the functions of several boards or even a network element in the past. In this way, there will be multiple CPUs in the communication single board, and there is a data packet interaction relationship among these CPUs. For example, the network interface card on the communication board receives a message from the network, and after the CPU of the network interface card performs related processing, it passes the message to the service processing CPU on the communication board. The file is passed to the network interface card, and the CPU of the network interface card performs appropriate processing and then transmits it to the network. [0003] Traditional methods for realiz...

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Problems solved by technology

[0003] Traditional methods for realizing high-efficiency communication between CPUs include: 1. Realize by planning circuit switching channels between CPUs, but the transmission capacity expansion of circuit switching channels is limited; 2. By using Ethernet between CPUs This method is very mature in the use of single-board processors inside the network element, which can meet the large-capacity exchange, and the exchange of data packets is also relatively flexible, but for the communication unit of the control network element For the communication between processors on the board, the communication in this case is mostly short-latency point-to-point communication, and the business payload is mostly short messages. When Ethernet switching is used, the transmission of data messages needs to use Lengthy Ethernet headers, and when receiving and sending data packets between CPUs, the encoding and decoding of the Ethernet transport layer needs to be performed first, which will reduce the efficiency of CPU usage and increase the delay

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