Actually no, I don't think that's right. When pinning is enabled each vCPU will
be affined to a single host CPU. What is showing below is what I would expect
if the instance was using non-dedicated CPUs.
To the original poster, you should be using
'hw:cpu_policy': 'dedicated'
in your flavor extra-specs to enable CPU pinning. And you should enable the
NUMATopologyFilter scheduler filter.
Chris
On 12/15/2015 09:23 AM, Arne Wiebalck wrote:
The pinning seems to have done what you asked for, but you probably
want to confine your vCPUs to NUMA nodes.
Cheers,
Arne
On 15 Dec 2015, at 16:12, Satish Patel <[email protected]> wrote:
Sorry forgot to reply all :)
This is what i am getting
[root@compute-1 ~]# virsh vcpupin instance-00000043
VCPU: CPU Affinity
----------------------------------
0: 2-3,6-7
1: 2-3,6-7
Following numa info
[root@compute-1 ~]# numactl --hardware
available: 2 nodes (0-1)
node 0 cpus: 0 3 5 6
node 0 size: 2047 MB
node 0 free: 270 MB
node 1 cpus: 1 2 4 7
node 1 size: 2038 MB
node 1 free: 329 MB
node distances:
node 0 1
0: 10 20
1: 20 10
On Tue, Dec 15, 2015 at 8:36 AM, Arne Wiebalck <[email protected]> wrote:
The pinning we set up goes indeed into the <cputune> block:
—>
<vcpu placement='static'>32</vcpu>
<cputune>
<shares>32768</shares>
<vcpupin vcpu='0' cpuset='0-7,16-23'/>
<vcpupin vcpu='1' cpuset='0-7,16-23'/>
…
<—
What does “virsh vcpupin <domain>” give for your instance?
Cheers,
Arne
On 15 Dec 2015, at 13:02, Satish Patel <[email protected]> wrote:
I am running JUNO version with qemu-kvm-ev-2.1.2-23.el7_1.9.1.x86_64
on CentOS7.1
I am trying to configure CPU pinning because my application is cpu
hungry. this is what i did.
in /etc/nova/nova.conf
vcpu_pin_set=2,3,6,7
I have created aggregated host with pinning=true and created flavor
with pinning, after that when i start VM on Host following this i can
see in guest
...
...
<vcpu placement='static' cpuset='2-3,6-7'>2</vcpu>
...
...
But i am not seeing any <cputune> info.
Just want to make sure does my pinning working correctly or something
is wrong. How do i verify my pinning config is correct?
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--
Arne Wiebalck
CERN IT
--
Arne Wiebalck
CERN IT
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