Open Stack

I'm using openstack-ansible to deploy openstack on centos 7.5 ( we are 100% centos shop )

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> On Sep 28, 2018, at 1:45 AM, Remo Mattei <remo at italy1.com> wrote:
> 
> Are you using ubutu, TripleO??? 
> 
> Thanks 
> 
>> Il giorno 27 set 2018, alle ore 20:19, Satish Patel <satish.txt at gmail.com> ha scritto:
>> 
>> I know this thread is old but still wanted to post my finding which
>> may help other folks to understand issue.
>> 
>> I am dealing with same issue in my openstack network, we are media
>> company and dealing with lots of VoIP applications where we need to
>> handle high stream of udp packets,  Virtio-net isn't meant to handl
>> high PPS rate, i ran couple of test and found no matter what txqueue
>> or multiqueue you set it will start dropping packet after 50kpps, I
>> have tried numa too but result is negative.
>> 
>> Finally i have decided to move and and try SR-IOV and now i am very
>> very happy, SR-IOV reduce my VM guest CPU load 50% and now my NIC can
>> handle 200kpps without dropping any packet.
>> 
>> I would say use "iptraf-ng" utility to find out packet rate and see if
>> its above ~40kpps.
>> On Fri, Jul 28, 2017 at 8:39 PM Eugene Nikanorov
>> <enikanorov at mirantis.com> wrote:
>>> 
>>> John,
>>> 
>>> multiqueue support will require qemu 2.5+
>>> I wonder why do you need this feature. It only will help in case of a really huge incoming pps or bandwidth.
>>> I'm not sure udp packet loss can be solved with this, but of course better try.
>>> 
>>> my 2c.
>>> 
>>> Thanks,
>>> Eugene.
>>> 
>>>>> On Fri, Jul 28, 2017 at 5:00 PM, Liping Mao (limao) <limao at cisco.com> wrote:
>>>>> 
>>>>> We already tune these values in the VM. Would you suggest tuning them on the compute nodes as well?
>>>> No need on compute nodes.(AFAIK)
>>>> 
>>>> 
>>>> How much pps your vm need to handle?
>>>> You can monitor CPU usage ,especially si to see where may drop. If you see vhost almost reach to 100% CPU ,multi queue may help in some case.
>>>> 
>>>> Thanks.
>>>> 
>>>> Regards,
>>>> Liping Mao
>>>> 
>>>>> 在 2017年7月28日，22:45，John Petrini <jpetrini at coredial.com> 写道：
>>>>> 
>>>>> We already tune these values in the VM. Would you suggest tuning them on the compute nodes as well?
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>