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[Xen-devel] xentrace and MSR_READ/MSR_WRITE


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
  • Date: Wed, 7 Jan 2009 18:42:43 +1100
  • Delivery-date: Tue, 06 Jan 2009 23:43:26 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Aclwm4ZBZZYFCOvdT/i9phfhWkhieg==
  • Thread-topic: xentrace and MSR_READ/MSR_WRITE

I am trying to learn some more about the way windows does TPR writes,
and tried xentrace for the first time.

I did 'xentrace --time-interval=5 xentrace.out' to capture some data,
and then ran it through 'xentrace_format' using the supplied example
defs file. I can see some PF_XEN entries with virt=0xFFFE0080 (address
of TPR), but I want to know the value being written, which I don't think
is there.

I'm also only seeing a handful of those records - I have 4 Windows
domains running on this test machine so there should be plenty of
'action' in those 5 seconds.

Can anyone suggest anything?

Thanks

James

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