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What was configured was pinning to a set and that is reflected, no? Or is that not referred to as “pinning”?
Anyway, for performance we didn’t see a difference between 1:1 pinning and confining (?) the vCPUs to a
a set as long as the instance is aware of the underlying NUMA topology.

Cheers,
 Arne


> On 15 Dec 2015, at 17:11, Chris Friesen <chris.friesen at windriver.com> wrote:
> 
> 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 <satish.txt at gmail.com> wrote:
>>> 
>>> Sorry forgot to reply all :)
>>> 
>>> This is what i am getting
>>> 
>>> [root at compute-1 ~]# virsh vcpupin instance-00000043
>>> VCPU: CPU Affinity
>>> ----------------------------------
>>>   0: 2-3,6-7
>>>   1: 2-3,6-7
>>> 
>>> 
>>> Following numa info
>>> 
>>> [root at 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 <Arne.Wiebalck at cern.ch> 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 <satish.txt at gmail.com> 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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> 
> 
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--
Arne Wiebalck
CERN IT