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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [RESEND][PATCH 0/3] Fix guest time drift under heavy load. |
Date: | Thu, 06 Nov 2008 09:41:46 -0600 |
User-agent: | Thunderbird 2.0.0.17 (X11/20080925) |
Gleb Natapov wrote:
On Thu, Nov 06, 2008 at 03:35:16PM +0100, andrzej zaborowski wrote:We're talking about emulating the hw. We have to make compromises sometimes, but we try to avoid them.Fair enough. Can we compromise in this case :)
We have work ahead of us to determine how much of a problem this really is. My suspicion is that we're going to discover that it's pretty difficult to produce noticable drift when using hosts with high resolution timers.
I think we'll also find that it's relatively easy to produce drift on older hosts. If that's the case, I don't think anything that's very invasive is going to be acceptable because of diminishing returns.
I think that a well isolated, optional work around that's enabled only on hosts that lack high resolution timers will probably be the solution.
Regards, Anthony Liguori
-- Gleb.
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