Great!
I have Xen hypervisor. Can I can memory information from "domain 0" instance as well. How to get physical utilization of each CPU attached to host? I know this is being handled in virt-top but how?
- Jovial
I have Xen hypervisor. Can I can memory information from "domain 0" instance as well. How to get physical utilization of each CPU attached to host? I know this is being handled in virt-top but how?
- Jovial
On Mon, Sep 1, 2008 at 5:04 PM, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
I'm not certain about whether the Java & Perl bindings support them,On Mon, Sep 01, 2008 at 04:54:04PM +0200, jovialGuy _ wrote:
> I am unable to find the api in java and perl binding to find the host node's
> current memory and cpu information. Any body has any idea where I can find
> the information?
but these are the calls you should use:
http://libvirt.org/html/libvirt-libvirt.html#virNodeGetInfo
http://libvirt.org/html/libvirt-libvirt.html#virNodeGetCellsFreeMemory
http://libvirt.org/html/libvirt-libvirt.html#virNodeGetFreeMemory
For CPU usage of the host, libvirt doesn't specifically provide that
information. If the hypervisor is Xen, then you can get information
about CPU usage of Dom0 (usually what is meant by "the host") using:
http://libvirt.org/html/libvirt-libvirt.html#virDomainGetInfo
but that won't work for QEMU/KVM where "the host node" is just the
Linux kernel. (In the local case, you can extract that information
you need just by looking in /proc or using ordinary Linux tools).
Also read this: http://et.redhat.com/~rjones/virt-top/faq.html#calccpu
Rich.
--
Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top
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