Clock switching method and device, server and clock system

Abstract

The embodiment of the invention provides a clock switching method and device, a server and a clock system, and the method comprises the steps: receiving a standby clock signal through a standby clocksignal input port of a switching circuit when detecting that a main clock signal is abnormal; reconstructing the phase of the standby clock signal, generating a reconstructed clock signal, and the phase of the reconstructed clock signal being consistent with the phase of the main clock signal before abnormality; and compensating the phase of the reconstructed clock signal according to the standbyclock signal and a preset phase adjustment speed, generating a compensated clock signal, outputting the compensated clock signal through a clock signal output port of the switching circuit, and the compensated clock signal being consistent with the standby clock signal in phase. According to the clock switching method provided by the embodiment of the invention, the phases of the clock signals ofthe TSCs provided for the processors can be ensured to be consistent, and the normal work of an operating system of a server is ensured.

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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