Re: [libvirt] [PATCH] nodeinfo: Add workaround if kernel reports bogous numa topology.
On Wed, Oct 31, 2012 at 4:50 PM, George-Cristian Bîrzan <gc(a)birzan.org>wrote:
on 0.10.2:
[root@host34 libvirt]# virsh nodeinfo
CPU model: x86_64
CPU(s): 24
CPU frequency: 2200 MHz
CPU socket(s): 1
Core(s) per socket: 6
Thread(s) per core: 1
NUMA cell(s): 4
Memory size: 131971020 KiB
and http://birzan.org/capabilities4-newlibvirt.txt
This has made the problem even worse, as we now can only use 6 cores out
of 24 by default (libvirt pins qemus to the CPUs is sees available, so we
have to manually taskset them after starting).
I should check before I let my mouth run. This actually fixed the problem,
we now get all 24 CPUs:
virsh # vcpuinfo 08867271-d458-43dc-8a03-807e83d107b4
VCPU: 0
CPU: 9
State: running
CPU time: 1.3s
CPU Affinity: yyyyyyyyyyyyyyyyyyyyyyyy
To give you an example from the 'broken' host (still with 0.10.2):
[root@host29 ~]# virsh vcpuinfo 17db9ebb-691b-47e1-bbf4-c9e3c1388d4f
VCPU: 0
CPU: 3
State: running
CPU time: 3103.2s
CPU Affinity: yyyyyyyyyyyy
VCPU: 1
CPU: 1
State: running
CPU time: 3460.4s
CPU Affinity: yyyyyyyyyyyy
--
George-Cristian Bîrzan
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