From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
To: George.Dunlap@eu.citrix.com, Jan Beulich <JBeulich@suse.com>
Cc: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Time Skewing on Windows XP
Date: Mon, 11 Mar 2013 23:40:28 -0500 [thread overview]
Message-ID: <513EB1BC.9050803@amd.com> (raw)
Hi,
While I was investigating the following issue on Windows XP (both 32-bit and 64-bit):
* AMD NPT performance regression after c/s 24770:7f79475d3de7
Reference:http://marc.info/?l=xen-devel&m=135075376805215
On the latest source form xen-unstable, I ran into an issue where the timing on the HVM guests skewing about 2x slower than the actual wall clock time. This results in the system time slowing down. This is regardless of the cpufreq governor scaling. (I tried with both ondemand and performance).
However, I don't see the same behavior on the Win7 HVM guests. Is this a known issue. I assume that XP and Win7 uses different mechanism for keeping time (e.g. rdtsc vs. HPET)?
Thank you,
Suravee
next reply other threads:[~2013-03-12 4:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-12 4:40 Suravee Suthikulpanit [this message]
2013-03-12 5:00 ` Time Skewing on Windows XP Steven Haigh
2013-03-12 8:03 ` Jan Beulich
2013-03-14 15:16 ` Suravee Suthikulanit
2013-03-14 16:06 ` Jan Beulich
2013-03-14 16:21 ` Suravee Suthikulanit
2013-03-14 16:34 ` Jan Beulich
2013-03-14 16:38 ` Suravee Suthikulanit
2013-03-14 17:03 ` Jan Beulich
2013-03-14 16:30 ` Tim Deegan
2013-03-14 16:43 ` Jan Beulich
2013-03-14 17:08 ` Tim Deegan
2013-03-14 20:23 ` Suravee Suthikulanit
2013-03-15 8:23 ` Jan Beulich
2013-03-21 12:33 ` Tim Deegan
2013-03-21 17:05 ` Jan Beulich
2013-03-14 16:24 ` Tim Deegan
2013-03-14 16:28 ` Jan Beulich
2013-03-12 9:13 ` Paul Durrant
2013-03-12 15:55 ` Suravee Suthikulanit
2013-03-12 16:13 ` Boris Ostrovsky
2013-03-12 18:25 ` Suravee Suthikulanit
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