Date: Wed, 30 Jun 2021 17:42:34 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 256781] EC2 Nitro: TSC-low timecounter lags Message-ID: <bug-256781-27103-KC2asXYdNj@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 --- Comment #20 from Colin Percival <cperciva@FreeBSD.org> --- (In reply to Roger Pau Monn=C3=A9 from comment #19) > So this system reports invariant TSC, but the TSCs are not synchronized a= cross CPUs? My understanding is that it's even worse than that: The TSC is not synchron= ized across a *single* CPU, since we're a VM guest and what we see as a single C= PU might move between host CPUs which aren't synchronized. --=20 You are receiving this mail because: You are the assignee for the bug.=
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