On 06/13/2016 02:17 PM, Paul Michali wrote:
Hmm... I tried Friday and again today, and I'm not seeing the VMs being evenly
created on the NUMA nodes. Every Cirros VM is created on nodeid 0.
I have the m1/small flavor (@GB) selected and am using hw:numa_nodes=1 and
hw:mem_page_size=2048 flavor-key settings. Each VM is consuming 1024 huge pages
(of size 2MB), but is on nodeid 0 always. Also, it seems that when I reach 1/2
of the total number of huge pages used, libvirt gives an error saying there is
not enough memory to create the VM. Is it expected that the huge pages are
"allocated" to each NUMA node?
Yes, any given memory page exists on one NUMA node, and a single-NUMA-node VM
will be constrained to a single host NUMA node and will use memory from that
host NUMA node.
You can see and/or adjust how many hugepages are available on each NUMA node via
/sys/devices/system/node/nodeX/hugepages/hugepages-2048kB/* where X is the host
NUMA node number.
Chris
__________________________________________________________________________
OpenStack Development Mailing List (not for usage questions)
Unsubscribe: [email protected]?subject:unsubscribe
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
