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From: Jamie Lokier <jamie@shareable.org>
To: qemu-devel@nongnu.org
Cc: Alexander Graf <agraf@suse.de>, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH 1/2] Add HPET emulation to qemu (v3)
Date: Fri, 17 Oct 2008 16:49:32 +0100	[thread overview]
Message-ID: <20081017154932.GA14229@shareable.org> (raw)
In-Reply-To: <1224245854.3399.7.camel@beth-laptop>

Beth Kon wrote:
> Clock drift on Linux is in the range of .017% - .019%, loaded and unloaded. I
> haven't found a straightforward way to test on Windows and would appreciate
> any pointers to existing approaches.

Is there any reason why there should be any clock drift, when the
guest is using a non-PIT clock?

I'm probably being naive, but with 32-bit or 64-bit HPET counters
available to the guest, and accurate values from the CMOS clock
emulation, I don't see why drift would accumulate over the long term
relative to the host clock.

-- Jamie

  reply	other threads:[~2008-10-17 15:49 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-17 12:17 [PATCH 1/2] Add HPET emulation to qemu (v3) Beth Kon
2008-10-17 15:49 ` Jamie Lokier [this message]
2008-10-20 19:08   ` [Qemu-devel] " Beth Kon
2008-10-27 10:49     ` Dor Laor
2008-10-30 17:57       ` [Qemu-devel] " Beth Kon
2008-11-05 12:55         ` Dor Laor
2008-11-05 14:48           ` [Qemu-devel] " Jamie Lokier
2008-10-21 15:21 ` Anthony Liguori
2008-10-27 14:07   ` Beth Kon
2008-10-29  3:41     ` Alexander Graf

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