[lxc-users] NUMA and LXC

[Serge Hallyn]

That goes into the container config.  If you wanted all containers on
the same node you could put it into /etc/lxc/default.conf before creating
containers.

Quoting CDR (venefax at gmail.com):
> ..and that goes in the container's config or in the master lxc config file?
> So ask, I am still getting the handle on LXC
> 
> On Fri, May 9, 2014 at 12:46 PM, Serge Hallyn <serge.hallyn at ubuntu.com> wrote:
> > lxc.cgroup.cpuset.mems = 1
> >
> > Quoting CDR (venefax at gmail.com):
> >> I think we need to add a configuration to the global lxc.conf whereas
> >> any given container may run only on one NUMA node, and if that is not
> >> possible, it should not even start.
> >>
> >> The performance for a container that is contained, so to speak, in  a
> >> single NUMA node, should be much higher that a container that has its
> >> processes all over the place.
> >>
> >> I noticed this in Hyper-V virtual machines, where you may set this
> >> restriction. The performance as measured by hdparm tT  --direct is
> >> twice than a virtual machine started without this feature.
> >>
> >> This is the distance between nodes, as reported by numactl --hardware
> >>
> >> node distances:
> >> node   0   1   2   3
> >>   0:  10  20  20  20
> >>   1:  20  10  20  20
> >>   2:  20  20  10  20
> >>   3:  20  20  20  10
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