[dpdk-users] [ovs-dev] Packet Drop Issue in OVS-DPDK L2FWD Application

vkrishnabhat k vkrishnabhatk at gmail.com
Sat Nov 24 08:44:29 CET 2018


Hi All,

Can any one help me on these queries ?

Thanks & Regards,
Venkat

On Wed, Nov 21, 2018 at 11:27 PM vkrishnabhat k <vkrishnabhatk at gmail.com>
wrote:

> Hi,
> Is it mandatory to run the DPDK l2fwd in guest machine and have Qemu-KVM
> and OVS-DPDK in host machine. Then bind the physical NIC bound to DPDK to
> OVS bridge br0 as ingress ports and also to bind guest VM to same bridge
> br0 using dpdk vhostuser port as egress port ? Or is it possible to run all
> the three (Quemu-KVM ,OVS-DPDK and l2fwd) in host machine itself  ?
>
> Thanks & Regards,
> Venkat
>
>
> On Tue, Nov 20, 2018 at 11:07 PM vkrishnabhat k <vkrishnabhatk at gmail.com>
> wrote:
>
>> Hi Ian,
>>
>> Good to hear from you,
>>
>> Yea, I am running DPDK sample application 'l2fwd'. But I am not running
>> it on the virtual machine(guest). I am running it on the same Ubuntu
>> machine (bare metal host) where I have installed Qemu-KVM and OVS_DPDK. I
>> am using OVS version 2.10.90 and DPDK 11.7.4 LTS in the host machine.
>>
>> I am attaching all the screen shots again with this mail for your
>> reference.
>>
>> Thanks in advance.
>>
>> Look forward to hear from you.
>>
>> Regards,
>> Venkat
>>
>> On Mon, Nov 19, 2018 at 2:35 PM Ian Stokes <ian.stokes at intel.com> wrote:
>>
>>> On 11/18/2018 8:16 PM, vkrishnabhat k wrote:
>>> > Hi Team,
>>> >
>>> > I am new to OVS and DPDK. While I am using l2fwd application with OVS
>>> and
>>> > DPDK I am seeing packet drop issue in OVS bridge.
>>> >
>>> > Topology : My topology has Ubuntu machine (Ubuntu 18.04 LTS). I have
>>> > installed Qemu-KVM 2.11.1 version. Also I am using OVS-DPDK. Please
>>> find
>>> > the detailed topology attached with this mail. I have bound two NICs
>>> (Intel
>>> > 82599ES 10-gigabit ) to dpdk IGB_UIO driver and also have added same
>>> ports
>>> > in to OVS bridge "br0". I am trying to send the bidirectional traffic
>>> from
>>> > both the port and measure the throughput value for the l2fwd
>>> application.
>>> >
>>>
>>> > Could you please help me with below questions to understand l2fwd
>>> better.
>>> >
>>>
>>> Hi, just a few questions to clarify, I assume you mean you are running
>>> the DPDK sample app 'l2fwd' in a Virtual machine that is also connected
>>> to bridge br0 via a vhostuser port?
>>>
>>> > What is the reason for packet drops in OVS bridge ?
>>> > What is the expected throughput value for l2fwd ?
>>> > How to improve the performance of l2fwd to get better throughput value
>>> ?
>>> > Is it possible to send or can l2fwd handle layer 7 traffic ?
>>> >
>>> > I tried tuning performance by adding more number of Rx queues and
>>> > increasing the Rx queue size as per the link "
>>> > http://docs.openvswitch.org/en/latest/intro/install/dpdk/", but it
>>> didn't
>>> > help much.
>>> >
>>>
>>> Can you provide what versions of OVS and DPDK are being used in the host
>>> and VM instances?
>>>
>>> > I have attached screen shots of the Topology, DPDK port statistics, OVS
>>> > configurations with this mail.
>>>
>>> I don't see these attached, they may have been filtered. Could you copy
>>> the output in these to the mail in text.
>>>
>>> Thanks
>>> Ian
>>>
>>> >
>>> > It will be really great if you could help me with this.
>>> >
>>> > Look forward to hear from you.
>>> >
>>> > Thanks in advance.
>>> >
>>> > Regards,
>>> > Venkat
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > dev mailing list
>>> > dev at openvswitch.org
>>> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>>> >
>>>
>>>


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