From: Dan Kenigsberg <danken@qumranet.com>
To: Koen Vermeer <koen@vermeer.tv>
Cc: kvm-devel@lists.sourceforge.net
Subject: Re: Clock off in guest
Date: Wed, 13 Feb 2008 13:25:38 +0200 [thread overview]
Message-ID: <20080213112536.GA6132@karma.qumranet.com> (raw)
In-Reply-To: <1202895704.5251.23.camel@localhost>
On Wed, Feb 13, 2008 at 10:41:44AM +0100, Koen Vermeer wrote:
> Hi,
>
> I'm running an Linux AMD64 guest on an AMD64 host. The host is running a
> 2.6.23 kernel (self compiled), the guest is running a stock
> linux-image-2.6.22-3-amd64 Debian kernel.
>
> My problem is that the clock on the guest is off (slow), while the clock
> on the host seems to be OK. When doing 'time sleep 10' on the guest, it
> takes about 16 'real' seconds for it to finish.
What is the clock source of your guest? If it is the traditional PIT,
you describe a known problem in busy hosts. You may try to set
clocksource=tsc in the guest kerenl parameters.
Regards,
Dan.
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next prev parent reply other threads:[~2008-02-13 11:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-13 9:41 Clock off in guest Koen Vermeer
2008-02-13 11:25 ` Dan Kenigsberg [this message]
2008-02-13 12:00 ` Uri Lublin
-- strict thread matches above, loose matches on Subject: below --
2008-02-13 12:52 koen
2008-02-13 17:58 ` Uri Lublin
2008-02-14 9:10 ` Koen Vermeer
2008-02-13 13:00 koen
2008-02-13 15:55 ` Dan Kenigsberg
2008-02-13 17:07 ` Koen Vermeer
2008-02-13 18:04 ` Dan Kenigsberg
2008-02-14 12:51 ` Koen Vermeer
2008-02-22 14:38 ` Steven Mooij
2008-02-13 16:13 koen
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