Re: [Xen-users] How are you measuring CPU usage?

[Peter Phaal <peter.phaal@xxxxxxxxx>]

Andy,

You might want to take a look at installing Host sFlow agents on your
hypervisors. The agent is extremely lightweight, directly accesses
statistics using libxenstat and exports them using the sFlow protocol
(XDR/UDP) to a remote collector.
http://host-sflow.sourceforge.net/

Ganglia can be used to collect the data from your hypervisors and
report performance:
http://blog.sflow.com/2012/01/using-ganglia-to-monitor-virtual.html

Are you using the Open vSwitch? It also includes sFlow support and can
give you a better handle on network performance:
http://openvswitch.org/

Peter

On Sun, Sep 16, 2012 at 5:23 AM, Andy Smith <andy@xxxxxxxxxxxxxx> wrote:
> Is there a better way to read a domU's CPU time counter than parsing
> the output of "xm list --long"? Is it available cheaply from
> somewhere in /sys or is there an API or anything?

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