Re: [libvirt] [RFC] NUMA topology specification

On 08/19/2011 01:35 AM, Bharata B Rao wrote: > ... > <topology sockets='1' cores='2' threads='1' nodeid='0' cpus='0-1' mem='size'> > <topology sockets='1' cores='2' threads='1' nodeid='1' cpus='2-3' mem='size'> > ... I like the idea of merging this into <topology> to prevent errors with specifying incompatible cpu and numa topologies but I think you can go a step further (assuming my following assertion is valid).  Since cpus are assigned to numa nodes at the core level, and you are providing a 'nodeid' attribute, you can infer the 'cpus' attribute using 'cores' and 'nodeid' alone. For your example above: <topology sockets='1' cores='2' threads='1' nodeid='0' mem='size'> <topology sockets='1' cores='2' threads='1' nodeid='1' mem='size'> You have 4 cores total, each node is assigned 2.  Assign cores to nodes starting with core 0 and node 0.