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Date:      Fri, 19 Nov 2021 07:39:57 +0000
From:      bugzilla-noreply@freebsd.org
To:        virtualization@FreeBSD.org
Subject:   [Bug 256781] EC2 Nitro: TSC-low timecounter lags
Message-ID:  <bug-256781-27103-akohywrIU6@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-256781-27103@https.bugs.freebsd.org/bugzilla/>
References:  <bug-256781-27103@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256781

dwmw2@infradead.org changed:

           What    |Removed                     |Added
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                 CC|                            |dwmw2@infradead.org

--- Comment #37 from dwmw2@infradead.org ---
The TSC shouldn't vary; I suspect what we're seeing here is an issue with t=
he
i8253 PIT making the calibration go wrong.

Do you have a current way to switch back from kvmclock to TSC and test, tha=
t I
can experiment with and then include in regression tests please?

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