[dpdk-dev] Cannot run l3fwd with the problem of " nb_tx_queues"

[Jose Gavine Cueto]

Hi yuxuan,

Yes, by experience I've successfully run dpdk with a virtualbox vm using an
e1000 NIC.  I'm not totally sure about the capabilities of the e1000 NIC
but based on the error you've mentioned, it seems that it can only support
1 TX queue.

"Now, I can use only one logic core to run the app and the performance of
l3fwd is undesirable."

This shows that dpdk can run successfully with 1 TX queue only because
probably your e1000 NIC only supports 1 queue.

Cheers,
Pepe


On Wed, Nov 27, 2013 at 6:58 PM, Zachary.Jen (簡汶翰) : 6305 <
Zachary.Jen at cas-well.com> wrote:

> Hi,
>
> I also have the same question in l3fwd example.
> I guess may DPDK don't support the chip-set so that we got this error msg.
>
> In my system, I have 2 kinds of chip-set, 82580 & 82574L.
> If I use l3fwd -c 3 -n 1 -- -p 3 --config '(0,0,0),(1,0,1)' in 82574L,
> it will get the error msg.
> But when I change my card with 82580 and use the same command to execute
> DPDK l3fwd.
> It's working.
>
> So, maybe the root cause is the DPDK does not support your chip-set and
> send out this error msg.
>
> On 11/14/2013 04:31 PM, Jose Gavine Cueto wrote:
> > Hi,
> >
> > Your nic (port 0) is capable of 1 txq only see error:
> >
> > " port_id=0 nb_tx_queues=2 > 1"
> >
> > I think that caused the error.
> >
> > Cheers,
> > Pepe
> >
> >
> > On Thu, Nov 14, 2013 at 1:21 PM, yuxuan zhang <zhangyuxuanxd at gmail.com
> >wrote:
> >
> >>   Hi Everyone:
> >>
> >> I meet a problem with running the DPDK1.3 example l3fwd in the VMware. I
> >> have two 82545EM NIC to run the l3fwd and the OS is Cent6.4. But l3fwd
> >> cannot be configured port correctly .I start the l3fwd with following
> >> command:
> >>
> >>      ./build/l3fwd  -c 0x3 -n 2 -- -p 0x3 --config="(0,0,0),(1,0,1)"
> >>
> >> However, I get following errors with debug info:
> >>
> >>      Initializing port 0 ... Creating queues: nb_rxq=1 nb_txq=2... PMD:
> >> rte_eth_dev_configure: ethdev     port_id=0 nb_tx_queues=2 > 1
> >>      EAL: Error - exiting with code: 1
> >>      Cause: Cannot configure device: err=-22, port=0
> >>
> >> And I have known that the reason for this problem produced in the
> >> **rte_eth_dev_configure function**. However, I do not kown how to fix
> it.
> >>
> >> I would really appreciate If someone could provide some help to solve
> this
> >> issue.
> >>
> >
> >
>
> --
> Best Regards,
> Zachary
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