[Xen-devel] RE: Issues about domU suspending/resuming

["Gustavo Pimentel" <gustavo.pimentel@xxxxxxxxxx>]

I didn't test the suspend/resuming with basic live migration.
Do you know how can I invoke some xen api in order to suspend/resuming the 
guest? I could make a simple program to be able to log times of 
suspending/resuming and on the future to analysis the basic live migration.
Meanwhile I leave here some information about the my test system:
I using xen4.2-unstable on a Intel(R) Pentium(R) 4 CPU 3.20GHz processor with 
hyperthread, using credit scheduler. I have pinning dom0 to vcpu0 and domU to 
vcpu1.
I have on dom0 the kernel version 2.6.32.40 and on domU the kernel version 
2.6.18 kernel which has fast suspend support.

> -----Original Message-----
> From: Keir Fraser [mailto:keir.xen@xxxxxxxxx]
> Sent: quinta-feira, 28 de Julho de 2011 18:33
> To: Gustavo Pimentel
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: Issues about domU suspending/resuming
> 
> On 28/07/2011 18:16, "Gustavo Pimentel" <gustavo.pimentel@xxxxxxxxxx> wrote:
> 
> > It's not really a bug, but a performance analysis.
> > I'm using remus for a HA system and after a system analysis using remus 
> > log, I
> > notice that suspending a the guest can oscillate between 0.299ms to 
> > 812.909ms.
> > And the resuming of the same guest oscillates between 0.387ms to 1745,579ms.
> > The guest it's a virtual machine with 64MB of RAM, without CPU load.
> >
> > It's very strange this large range of values of the suspend/resuming of a
> > guest.
> 
> First point of contact would be the listed Remus maintainer. More data would
> be useful I expect -- e.g., does the variation occur with basic live
> migration (no Remus)?
> 
>  -- Keir
> 
> >> -----Original Message-----
> >> From: Keir Fraser [mailto:keir.xen@xxxxxxxxx]
> >> Sent: quinta-feira, 28 de Julho de 2011 18:00
> >> To: Gustavo Pimentel
> >> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> >> Subject: Re: Issues about domU suspending/resuming
> >>
> >> On 28/07/2011 17:13, "Gustavo Pimentel" <gustavo.pimentel@xxxxxxxxxx>
> wrote:
> >>
> >>> Hi, I have looked into the MAINTAINERS file on the xen source, but I 
> >>> didn¹t
> >>> find the specific maintainer for responsible for issues about domU
> >>> suspending/resuming procedure.
> >>> Can you point me to the right person?
> >>
> >> It crosses multiple subsystems. It could be a guest kernel bug for example,
> >> or a toolstack bug. Post a bug report to xen-devel and we can try to triage
> >> it.
> >>
> >>  -- Keir
> >>
> >>
> >>
> >>
> >
> >
> 
> 



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