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From: Tim Chen <tim.c.chen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Clock running at double speed in guest
Date: Fri, 26 Jan 2007 16:31:46 -0800	[thread overview]
Message-ID: <1169857906.30807.52.camel@localhost.localdomain> (raw)

I notice that when I am testing kvm, the clock on guest is running at
twice the speed.  Same thing also happen using qemu without kvm.

I look at my wall clock when I issue the command "time sleep 30".  When
the command returns and report 30 sec has elasped, I found that actually
only 15 sec has passed on the wall clock.  Perhaps somewhere an extra
clock tick was counted.

I am using 2.6.20-rc5 on host and 2.6.19 on guest.  Test is done on a
dual socket woodcrest machine.

Tim

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             reply	other threads:[~2007-01-27  0:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-27  0:31 Tim Chen [this message]
     [not found] ` <1169857906.30807.52.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-01-27  8:57   ` Clock running at double speed in guest Avi Kivity
     [not found]     ` <45BB13EF.1020204-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-01-28  9:37       ` Dor Laor
     [not found]         ` <64F9B87B6B770947A9F8391472E032160A300FDE-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org>
2007-01-29 19:44           ` Tim Chen
2007-03-06 13:34   ` Avi Kivity
     [not found]     ` <45ED6DE9.4060409-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-03-06 15:56       ` Tim Chen
     [not found]         ` <1173196568.8383.16.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-03-06 16:52           ` Avi Kivity
     [not found]             ` <45ED9C56.1050906-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-03-06 17:19               ` Tim Chen
2007-03-06 16:53           ` Dor Laor
     [not found]             ` <64F9B87B6B770947A9F8391472E032160ABD6049-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org>
2007-03-06 17:24               ` Tim Chen

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