From: Paolo Bonzini <pbonzini@redhat.com>
To: Mohammed Gamal <mohammed.gamal@profitbricks.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] kvmclock, Migration, and NTP clock jitter
Date: Thu, 15 Jan 2015 18:27:54 +0100 [thread overview]
Message-ID: <54B7F89A.80107@redhat.com> (raw)
In-Reply-To: <CAHTgm8+8y7e5nNBi-0Aed-zbsa4P22TmJ3Oywcc672VLP4VuRg@mail.gmail.com>
On 15/01/2015 17:39, Mohammed Gamal wrote:
> The increase in the jitter and offset values is well within the 500 ppm
> frequency tolerance limit, and therefore are easily corrected by
> subsequent NTP clock sync events, but some live migrations do cause much
> higher jitter and offset jumps, which can not be corrected by NTP and
> cause the time to go way off. Any idea why this is the case?
It might be fixed in QEMU 2.2.
See https://lists.gnu.org/archive/html/qemu-devel/2014-09/msg01239.html
Paolo
next prev parent reply other threads:[~2015-01-15 17:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 16:39 [Qemu-devel] kvmclock, Migration, and NTP clock jitter Mohammed Gamal
2015-01-15 17:27 ` Paolo Bonzini [this message]
2015-01-16 10:21 ` Mohammed Gamal
2015-01-21 10:20 ` Mohammed Gamal
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