Re: [Libvir] Extending libvirt to probe NUMA topology
Daniel P. Berrange wrote:
- Linux/Solaris Xen - hypercalls
- Linux non-Xen - libnuma
- Solaris non-Xen - liblgrp
The Xen & Linux modelling seems reasonably similar IIRC, but Solaris is
a slightly different representational approach.
The Solaris approach seems to be fully hierarchical as far as I can work
out.
That seems to argue for extending the capabilities XML to describe
nodes, in as much as the XML can start off as a flat list of NUMA nodes
(for IBM) but later be made hierarchical if necessary.
Yes that is correct. We should not change the default - let the OS
appply
whatever policy it sees fit by default, since over time OS are tending
towards being able to automagically determine & apply NUMA policy.
Or add another domain creation call which allows passing an additional
set of hints. One of the hints would be initial cpu pinning.
Rich.
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