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CPU message flow control method of distributed exchange router system

A flow control and router technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as crashes, abnormal system operation, and other tasks that cannot be scheduled, so as to reduce occupancy and prevent exhaustion. Effect

Inactive Publication Date: 2004-02-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large number of CPU packet processing occupies almost all CPU resources, other tasks will not be scheduled, which will cause the system to run abnormally or even crash.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The implementation of distributed CPU packet flow control requires the main control board and service board to monitor and count their respective CPU message queues, and the service board obtains the CPU utilization rate of the main control board from the main control board and calculates the CPU packet flow based on this the maximum value.

[0024] The number of various types of CPU packets in the current system per unit time is obtained through statistics of a CPU packet flow statistics module. The CPU packet flow statistics module establishes a counter for each type of packet, and every time a packet is received, the counter The value is increased by one; at the same time, there is a timer in the system that clears all message counters with a period of 1 second. In this way, the current value of each message counter is the current flow of CPU messages of this type.

[0025] The calculation of the packet-controlled traffic threshold is triggered by the timer of the CP...

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Abstract

The present invention provides a CPU message flow control method for distributed exchange router system. By utilizing real-time statistics of the number of various types of CPU message of current system in unit time said invention can monitor the flow quantity of various types of CPU mossage, and can judge that it has need of adopting message control measure to reduce flow quantity of CPU messageor not according to the message control flow threshold value. When the CPU message flow exceeds the CPU processing capacity, said invention can adopt a certain measure to reduce flow of CPU message.

Description

Technical field: [0001] The invention belongs to the technical field of distributed switching router systems in modern IP communication networks, and in particular relates to a flow control method for CPU messages in a rack-type switching routing device with multiple service boards. Background technique: [0002] In the modern IP broadband communication network, high-performance switching routers have extremely high strategic significance as the core part of the network. Most of these switching routers adopt a distributed architecture, a multi-slot rack structure, and can be configured with a main control board, redundant backup boards for the main control board, and multiple service boards. Both the main control board and the service board have their own CPU and memory resources, but their division of labor is different. The service board is mainly responsible for forwarding, and can also share some protocol processing that does not require global processing. The task of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/08H04L47/20
Inventor 李德尔沈忱夏迎春王东
Owner HUAWEI TECH CO LTD
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