Re: [Xen-devel] monitoring domain resource usage

[Rolf Neugebauer <rolf.neugebauer@xxxxxxxxx>]

On Wed, 2004-10-20 at 00:53, Diwaker Gupta wrote:
> On Tue, 19 Oct 2004 21:52:59 +0100, Neugebauer, Rolf
> <rolf.neugebauer@xxxxxxxxx> wrote:
> > There currently is no such tool, however xen exports via the control
> > interface to dom0 the relevant information. E.g. 'xm list' reports cpu
> > time consumed per VM. It should be straight forward to implement a tool
> > periodically calling this interface and compute CPU percentages. This
> > could either be done via the 'xm' interface or the xen.lowlevel.xc
> > interface. The latter should have less overhead.
> 
> I played around with 'xm list' but soon ran into problems. I'm not
> sure if this is specific to a particular CPU scheduler, or a general
> problem that others have noticed too.
> 
> Right now I have xen (booted using sched=atropos) running two VMs,
> each running a CPU intensive job. However, the cpu-time (as reported
> by xm list -l) does not seem to be changing *at all*, even across runs
> lasting for minutes. The uptime gets updated properly, though.
> 
> Is this a known issue?

I can not reproduce this. I run two while one loops in two domains and
cpu time goes up...i have not tested with different scheduling
parameters. This is on a machine with xen 2.0 as off a week or so ago. 

In general atropos is not really tested that much.

Rolf



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