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Time synchronizing method and device

A time synchronization, time technology, applied in the direction of generating/distributing signals, etc., to achieve the effect of improving system performance

Active Publication Date: 2007-04-18
XINHUASAN INFORMATION TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to propose a time synchronization method for defects such as the impact of timer interruption on system performance during time synchronization in the existing multi-core CPU, which can ensure that the system time in the multi-core CPU is consistent, and does not require each CPU core Both handle timer interrupts to reduce the impact of timer interrupts on system processing performance

Method used

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Embodiment Construction

[0032] In view of the fact that in the existing multi-CPU core communication equipment, each CPU core needs to use the internal timer interrupt when maintaining and synchronizing the system time, thus affecting the system performance, the present invention adopts a centralized clock management, which does not require each CPU core to Both maintain the system time, so that the CPU core can share the current system time and improve system performance.

[0033] As shown in FIG. 3 , it is a schematic structural diagram of an embodiment of the time synchronization device of the present invention. In this embodiment, the system time synchronization system includes a main control CPU core 1 , a system time storage module 2 and other CPU cores 3 . Among them, the main control CPU core 1 can perform centralized management of the system time, while the other CPU cores 3 are non-main control CPU cores, which do not need to maintain the system time, and only obtain it when needed. In this...

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Abstract

The invention relates to time synchronization method. It includes the following steps: main control CPU accumulates system time according to timer interruption to gain current system time; and it writes the current system time into system time memory module; non main control CPU core acquires the system time request, reads the current system time from the system time memory module. The invention also relates to time synchronization device used in multi-core CPU system, includes main control CPU core, one or many non main control CUP cores and system time memory module. Thus it can make the non main control CPU core share the current system time, not need to interrupt timer to synchronize system time to ensure system time synchronization, but only need main control CPU to response timer interruption, reduce non main control CPU interruption spending to increase system performance.

Description

technical field [0001] The invention relates to a system time synchronization technology in communication equipment, in particular to a time synchronization method in communication equipment and a time synchronization device. Background technique [0002] For various communication devices or computer devices in the communication network, the system time inside the device as an important parameter needs to be synchronized with the Universal Time Coordinated (UTC) as much as possible, and the time deviation is usually limited to a small enough within the range (such as 100ms). In order to ensure the smooth completion of time synchronization, the clocks of each node in the time synchronization network need to use a dedicated network time synchronization technology to synchronize with UTC. In the Internet, the Network Time Protocol (NTP) is generally used as the time synchronization protocol for the system time of various communication devices in the Internet. The accuracy of t...

Claims

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Application Information

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IPC IPC(8): G06F1/12
Inventor 郭昕
Owner XINHUASAN INFORMATION TECH CO LTD
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