Clock switching method, device, server and clock system

Abstract

Embodiments of the present application provide a clock switching method, device, server, and clock system. The method includes, when an abnormality is detected in the main clock signal, receiving the standby clock signal through the standby clock signal input port of the switching circuit; The phase is reconstructed, and the reconstructed clock signal is generated. The phase of the reconstructed clock signal is consistent with the phase of the main clock signal before the abnormality; the phase of the reconstructed clock signal is compensated according to the standby clock signal and the preset phase adjustment speed , and generate a compensated clock signal, output the compensated clock signal through the clock signal output port of the switching circuit, and the phase of the compensated clock signal is consistent with the phase of the standby clock signal. The clock switching method provided in the embodiment of the present application can ensure that the phases of the clock signals provided to the TSCs of each processor are consistent, and ensure the normal operation of the operating system of the server.

Description

technical field [0001] The present application relates to the computer field, in particular to a clock switching method, device, server and clock system. Background technique [0002] The server includes a processor, and a time stamp counter (Time Stamp Counter, TSC) is located inside the processor, and is used to provide a clock signal for an operating system running on the server. In the clock system, the clock source of the TSC adopts a redundant design, and the clock source is provided for the TSC through the main clock board and the backup clock board. When the main clock board fails, the switching circuit corresponding to the processor will switch the clock source of the TSC provided to the processor to the standby clock board, and the standby clock board will continue to work instead of the main clock board, so as to avoid affecting the server's business processing. Because there may be a phase difference between the clock signal provided by the standby clock board a...

AI Technical Summary

Problems solved by technology

In a multiprocessor server, different switching circuits have different processing deviations when reconstructing the same clock signal, so there is a phase deviation between the clock signals obtained after different switching circuits reconstruct the phase of the standby clock signal, and the phase may be The deviations are also different, resulting in inconsistent phases of the clock signals provided to the TSCs of each processor, which in turn affects the normal operation of the server's operating system

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