Re: [Xen-devel] Is this a bug of xentrace?

[Hui Kang <hkang@xxxxxxxxxxxxx>]

Ok, I know that 0x00007fff is for the idle domain, because when I use 
xenmon it has the same idle domain. However, I have one guest domain 
running an infinite loop program (while{ int temp = 676*1.5;}). This 
guest domain is listed by "xm list". But xenmon and xentrace can not 
detect this guest domain.
However, when I stop the program in that domain, xentrace and xenmon can 
detect it. Why?
Thanks.

- Hui

Hui Kang wrote:
> Yes, it is 0x00007fff. This is one line  in the parsed trace file.
> CPU1  962569711226060 (+     574)  switch_infnext    [ new_domid = 
> 0x00007fff, time = 14321, r_time =30000000 ]
> When I use "xm list", it shows the domain id is 5. There are only two 
> domains on the host.
> Can any one point out what does "0x00007fff" this number mean? Thanks.
>
> - Hui
>
> George Dunlap wrote:
> > Are you sure that's not 0x7fff? (Three f's, not four?)  0x7fff is the
> > domain ID of the idle domain (scheduled when there is no other work on
> > the system to do).
> >
> >  -George
> >
> > On Sat, May 9, 2009 at 7:56 PM, Hui Kang <hkang@xxxxxxxxxxxxx> wrote:
> >  
> > > Hi,
> > > I am using xentrace to trace the events of guest domains on a host 
> > > physical
> > > machine.  In the parsed trace file,
> > > if the guest domain is created on the host machine, then the entry 
> > > is good
> > > switch_infprev    [ old_domid = 0x00000002
> > > // the guest domain has a id of 2.
> > > switch_infnext    [ new_domid = 0x00000000
> > >
> > > However, if the guest domain is migrated from another host machine,  
> > > the
> > > parsed trace file shows
> > > switch_infprev    [ old_domid = 0x00007ffff
> > > // the guest domain has a id of 2.
> > > switch_infnext    [ new_domid = 0x00000000
> > > Even the domain Id is 2, it shows 0x00007ffff.
> > > Can anyone explain this? Thanks.
> > >
> > >
> > >
> > >
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> > >
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> >
> >
> > .
> >
> >   
>
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