Re: [libvirt] [PATCH RFC]: Support numad

On Tue, Feb 28, 2012 at 11:33:03AM -0500, Dave Allan wrote: > On Tue, Feb 28, 2012 at 10:10:50PM +0800, Osier Yang wrote: > > numad is an user-level daemon that monitors NUMA topology and > > processes resource consumption to facilitate good NUMA resource > > alignment of applications/virtual machines to improve performance > > and minimize cost of remote memory latencies. It provides a > > pre-placement advisory interface, so significant processes can > > be pre-bound to nodes with sufficient available resources. > > > > More details: http://fedoraproject.org/wiki/Features/numad > > > > "numad -w ncpus:memory_amount" is the advisory interface numad > > provides currently. > > > > This patch add the support by introducing new XML like: > > <numatune> > > <cpu required_cpus="4" required_memory="524288"/> > > </numatune> > > Isn't the usual case going to be the vcpus and memory in the guest? > IMO we should default to passing those numbers to numad if > required_cpus and required_memory are not provided explicitly. Indeed, why you would want to specify anything different ? At first glance my reaction was just skip the XML and call numad internally automatically with the guest configured allocation

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 :|