On Tue, Sep 17, 2013 at 05:41:12PM +0800, Peeyush Gupta wrote:
Hi all,
I have been trying to find out cpu topology using libvirt. When I do 'virsh capabilites', I find this inside <topology> tag:
<topology> <cells num='1'> <cell id='0'> <memory unit='KiB'>3908488</memory> <cpus num='4'> <cpu id='0' socket_id='0' core_id='0' siblings='0'/> <cpu id='1' socket_id='0' core_id='0' siblings='1'/> <cpu id='2' socket_id='0' core_id='1' siblings='2'/> <cpu id='3' socket_id='0' core_id='1' siblings='3'/> </cpus> </cell> </cells> </topology>
But when I use the 'getCapbilities()' function of the python binding, the result is: <topology> <cells num='1'> <cell id='0'> <cpus num='4'> <cpu id='0'/> <cpu id='1'/> <cpu id='2'/> <cpu id='3'/> </cpus> </cell> </cells> </topology>\n
As you can see this doesnt give any information about socket/core/thread etc. What I an interested to know is that is it a limitation of python binding or libvirt C API itself? How can I get the whole topology without just parsing the output of virsh capabilities?
Did you really run these two examples on the same machine, with the same libvirt URI ? Both virsh and the python binding call the same libvirt API 'virConnectGetCapabilities' so will return the same data if run against the same libvirt. The socket_id, core_id and siblings data is a relatively new feature we added, so older libvirt won't show it. Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|