Interface name after bound to IGB

Interface name after bound to IGB

[Shankari Vaidyalingam]

Hi

By what name is the NIC port identified after it is bound to the igb_uio
driver (i.e after it becomes a DPDK interface)
I'm asking this question because the interface does not get displayed in
the output of the "ifconfig" after it gets bound to igb_uio driver.


Regards
Shankari.V

Re: Interface name after bound to IGB

[Bruce Richardson]

On Wed, Mar 25, 2015 at 08:00:02PM +0530, Shankari Vaidyalingam wrote:
> Hi
> 
> By what name is the NIC port identified after it is bound to the igb_uio
> driver (i.e after it becomes a DPDK interface)
> I'm asking this question because the interface does not get displayed in
> the output of the "ifconfig" after it gets bound to igb_uio driver.
> 
> 
> Regards
> Shankari.V

Identified where, or to what? It still maintains the same PCI bus-device-function
which can be used to identify it, if that is what you mean.

/Bruce

Re: Interface name after bound to IGB

[Shankari Vaidyalingam]

Hi Bruce,


If I want to capture the packets received by the interface bound to IGB
(DPDK interface) then I'd like to know what would be the interface name
that must be given.

Regards
Shankari.V


On Wed, Mar 25, 2015 at 8:33 PM, Bruce Richardson <
bruce.richardson-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:

> On Wed, Mar 25, 2015 at 08:00:02PM +0530, Shankari Vaidyalingam wrote:
> > Hi
> >
> > By what name is the NIC port identified after it is bound to the igb_uio
> > driver (i.e after it becomes a DPDK interface)
> > I'm asking this question because the interface does not get displayed in
> > the output of the "ifconfig" after it gets bound to igb_uio driver.
> >
> >
> > Regards
> > Shankari.V
>
> Identified where, or to what? It still maintains the same PCI
> bus-device-function
> which can be used to identify it, if that is what you mean.
>
> /Bruce
>

Re: Interface name after bound to IGB

[Bruce Richardson]

On Wed, Mar 25, 2015 at 08:44:51PM +0530, Shankari Vaidyalingam wrote:
> Hi Bruce,
> 
> 
> If I want to capture the packets received by the interface bound to IGB
> (DPDK interface) then I'd like to know what would be the interface name
> that must be given.
> 
> Regards
> Shankari.V
> 

To capture using DPDK, the port will be picked up automatically by DPDK init
sequence, or you can explicitly whitelist it via BDF, if you really want. To
capture using something that uses the kernel driver, e.g. using libpcap, you
need to unbind from igb_uio and bind back to the kernel driver again.

Regards,
/Bruce

> 
> On Wed, Mar 25, 2015 at 8:33 PM, Bruce Richardson <
> bruce.richardson-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:
> 
> > On Wed, Mar 25, 2015 at 08:00:02PM +0530, Shankari Vaidyalingam wrote:
> > > Hi
> > >
> > > By what name is the NIC port identified after it is bound to the igb_uio
> > > driver (i.e after it becomes a DPDK interface)
> > > I'm asking this question because the interface does not get displayed in
> > > the output of the "ifconfig" after it gets bound to igb_uio driver.
> > >
> > >
> > > Regards
> > > Shankari.V
> >
> > Identified where, or to what? It still maintains the same PCI
> > bus-device-function
> > which can be used to identify it, if that is what you mean.
> >
> > /Bruce
> >

Re: Interface name after bound to IGB

[Olivier MATZ]

Hi Shankari,

On 03/25/2015 04:14 PM, Shankari Vaidyalingam wrote:
> Hi Bruce,
>
>
> If I want to capture the packets received by the interface bound to IGB
> (DPDK interface) then I'd like to know what would be the interface name
> that must be given.

If you want to capture the packets, you have to write your program
(maybe based on an example) that displays the packet or save them
into a pcap format. For that, you don't need the interface name but
the portid, which is displayed with the PCI id when you start the dpdk.

Regards,
Olivier

Re: Interface name after bound to IGB

[Shankari Vaidyalingam]

Hi Olivier,

Thanks for the response.
I executed the L2fwd application by injecting packets from an external
source to the DPDK bound interface.
I was not able to see the stats getting incremented. I'm doing this testing
on a VM inside Oracle VirtualBox.
I've added 2 Bridged Adapters with the adapter type set to "Intel 82545 EM".
I have configured the huge page mappings, bound interface to IGB driver.
Still I'm facing this issue.
Can you pls let me know how to solve this.
It is for this reason I asked the packet capture.

Regards
Shankari.V

On Wed, Mar 25, 2015 at 8:50 PM, Olivier MATZ <olivier.matz-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
wrote:

> Hi Shankari,
>
> On 03/25/2015 04:14 PM, Shankari Vaidyalingam wrote:
>
>> Hi Bruce,
>>
>>
>> If I want to capture the packets received by the interface bound to IGB
>> (DPDK interface) then I'd like to know what would be the interface name
>> that must be given.
>>
>
> If you want to capture the packets, you have to write your program
> (maybe based on an example) that displays the packet or save them
> into a pcap format. For that, you don't need the interface name but
> the portid, which is displayed with the PCI id when you start the dpdk.
>
> Regards,
> Olivier
>
>

Re: Interface name after bound to IGB

[Olivier MATZ]

Hi,

On 03/26/2015 04:58 AM, Shankari Vaidyalingam wrote:
> Hi Olivier,
>
> Thanks for the response.
> I executed the L2fwd application by injecting packets from an external
> source to the DPDK bound interface.
> I was not able to see the stats getting incremented. I'm doing this
> testing on a VM inside Oracle VirtualBox.
> I've added 2 Bridged Adapters with the adapter type set to "Intel 82545 EM".
> I have configured the huge page mappings, bound interface to IGB driver.
> Still I'm facing this issue.
> Can you pls let me know how to solve this.
> It is for this reason I asked the packet capture.

I have no experience with VirtualBox, so I don't know if its emulated
devices are properly supported.

Regards,
Olivier

PS: please do not top-post