Open Stack

Hi Satish,

Actually, our customer get this issue when the tx/rx above only 40k pps. So
what is the threshold of this throughput for OvS?


Thanks and regards

On Wed, 6 Sep 2023 at 20:19 Satish Patel <satish.txt at gmail.com> wrote:

> Hi,
>
> This is normal because OVS or LinuxBridge wire up VMs using TAP interface
> which runs on kernel space and that drives higher interrupt and that makes
> the kernel so busy working on handling packets. Standard OVS/LinuxBridge
> are not meant for higher PPS.
>
> If you want to handle higher PPS then look for DPDK or SRIOV deployment. (
> We are running everything in SRIOV because of high PPS requirement)
>
> On Tue, Sep 5, 2023 at 11:11 AM Ha Noi <hanoi952022 at gmail.com> wrote:
>
>> Hi everyone,
>>
>> I'm using Openstack Train and Openvswitch for ML2 driver and GRE for
>> tunnel type. I tested our network performance between two VMs and suffer
>> packet loss as below.
>>
>> VM1: IP: 10.20.1.206
>>
>> VM2: IP: 10.20.1.154 <https://10.20.1.154/24>
>>
>> VM3: IP: 10.20.1.72
>>
>>
>> Using iperf3 to testing performance between VM1 and VM2.
>>
>> Run iperf3 client and server on both VMs.
>>
>> On VM2: iperf3 -t 10000 -b 130M -l 442 -P 6 -u -c 10.20.1.206
>>
>> On VM1: iperf3 -t 10000 -b 130M -l 442 -P 6 -u -c 10.20.1.154
>> <https://10.20.1.154/24>
>>
>>
>> Using VM3 ping into VM1, then the packet is lost and the latency is quite
>> high.
>>
>>
>> ping -i 0.1 10.20.1.206
>>
>> PING 10.20.1.206 (10.20.1.206) 56(84) bytes of data.
>>
>> 64 bytes from 10.20.1.206: icmp_seq=1 ttl=64 time=7.70 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=2 ttl=64 time=6.90 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=3 ttl=64 time=7.71 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=4 ttl=64 time=7.98 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=6 ttl=64 time=8.58 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=7 ttl=64 time=8.34 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=8 ttl=64 time=8.09 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=10 ttl=64 time=4.57 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=11 ttl=64 time=8.74 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=12 ttl=64 time=9.37 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=14 ttl=64 time=9.59 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=15 ttl=64 time=7.97 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=16 ttl=64 time=8.72 ms
>>
>> 64 bytes from 10.20.1.206: icmp_seq=17 ttl=64 time=9.23 ms
>>
>> ^C
>>
>> --- 10.20.1.206 ping statistics ---
>>
>> 34 packets transmitted, 28 received, 17.6471% packet loss, time 3328ms
>>
>> rtt min/avg/max/mdev = 1.396/6.266/9.590/2.805 ms
>>
>>
>>
>> Does any one get this issue ?
>>
>> Please help me. Thanks
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.openstack.org/pipermail/openstack-discuss/attachments/20230906/c2b46c06/attachment-0001.htm>