linux-kernel - Re: [BUG]Uncalibrated TSC is not accurate enough as a time keeper

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Date:   Thu, 27 Dec 2018 18:35:13 +0100
From:   Florian Weimer <fw@...eb.enyo.de>
To:     Da Shi Cao <dscao999@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-x86_64@...r.kernel.org
Subject: Re: [BUG]Uncalibrated TSC is not accurate enough as a time keeper

* Da Shi Cao:

> The cpu_khz and tsc_khz are now read directly by the cpuid
> instruction, and they are deemed to be very accurate. But this is not
> the case in our situation. The OS time lags behind about 8 seconds per
> hour. The CPU information is as follows:

Is virtualization involved?  Do you use a vendor kernel?

Note that <linux-x86_64@...r.kernel.org> is more or less dead, and
your message to linux-kernel might get lost in the flood.