Clock synchronization method, device and system

A clock synchronization and internal clock technology, which is applied in the computer field, can solve problems such as difficulty in project execution, inconsistent synchronization of virtual machine time and programmable device time, etc., to achieve accurate clock synchronization and reduce intermediate processes.

Pending Publication Date: 2022-03-25
ALIBABA CLOUD COMPUTING LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, since the time of the virtual machine and the time of the programmable device are not actually synchronized, it brings certain difficulties to the execution of related projects

Method used

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  • Clock synchronization method, device and system
  • Clock synchronization method, device and system
  • Clock synchronization method, device and system

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Embodiment Construction

[0029] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the specification. However, this specification can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of this specification, so this specification is not limited by the specific implementations disclosed below.

[0030] Terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only, and are not intended to limit one or more embodiments of this specification. As used in one or more embodiments of this specification and the appended claims, the singular forms "a", "the", and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present specification refers t...

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Abstract

The embodiment of the invention provides a clock synchronization method, device and system.The clock synchronization method applied to a programmable device comprises the steps that in response to a received clock synchronization request, a DMA read instruction is generated, a first timestamp currently written in by a virtual machine is read from a DMA memory through the DMA read instruction, and the first timestamp is written in by the virtual machine; and the first timestamp is updated to an internal clock, so that the effect of accurately synchronizing the programmable device and the virtual machine clock is achieved.

Description

technical field [0001] The embodiments of this specification relate to the field of computer technology, and in particular to a clock synchronization method. One or more embodiments of this specification also relate to a clock synchronization device, system, computing device, and computer-readable storage medium. Background technique [0002] Programmable devices, such as Field Programmable Gate Array FPGA, solve the shortage of custom circuits and can be used to design products in various industries. For example, on the basis of programmable devices, a complete computer system, a virtual machine, with complete hardware system functions and running in a completely isolated environment can be created through software simulation. [0003] In some projects, in order to perform time-related tasks, it is necessary to use programmable device time and virtual machine time. For example, in a network diagnosis project, it is necessary to analyze the full link delay from the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/12G06F13/28G06F9/455
CPCG06F1/12G06F13/28G06F9/45558G06F2009/45583
Inventor 李光水
Owner ALIBABA CLOUD COMPUTING LTD
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