Date: Mon, 19 Dec 2011 20:41:47 -0500 (EST) From: "Sean C. Farley" <scf@FreeBSD.org> To: Larry Rosenman <ler@lerctr.org> Cc: freebsd-ports@FreeBSD.org Subject: Re: Fwd: Lousy timekeeping in VirtualBox 4.0.14 Message-ID: <alpine.BSF.2.02.1112192036340.3332@thor.farley.org> In-Reply-To: <4EEA5461.4080107@lerctr.org> References: <4EE9014F.7010300@lerctr.org> <4EEA5461.4080107@lerctr.org>
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On Thu, 15 Dec 2011, Larry Rosenman wrote: > I've set up VirtualBox 4.0.14 on my FreeBSD 10.0-CURRENT (r228498) > box, and have a FreeBSD 10.0-CURRENT VM running underneath it. > > While the VM is running, it doesn't keep time worth a flip. > > This is even with the VirtualBox-Additions in it. > > 1) is this expected/known? > 2) What can we do to fix it? > > What diagnostics do you need? > > I *CAN* provide ssh access to both the host and the guest. I recall two things that caused problems for me in the past. One was running a VM in a Linux host that caused havoc on the time under load. My only "solution" was to disable PowerNow! in the BIOS. The second was on a WinXP host which was fixed, if I recall correctly, by changing the timecounter (kern.timecounter.hardware). I think I set it to HPET or ACPI-*. I hope one of those helps. Sean -- scf@FreeBSD.org
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