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

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

[vkrishnabhat k]

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.

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.

I have attached screen shots of the Topology, DPDK port statistics, OVS
configurations with this mail.

It will be really great if you could help me with this.

Look forward to hear from you.

Thanks in advance.

Regards,
Venkat

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

[Ian Stokes]

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@openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
> 

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

[vkrishnabhat k]

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@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@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@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@openvswitch.org
>>> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>>> >
>>>
>>>