[ovs-discuss] Why testpmd fails to start in VM while l2fwd works in the same VM?

[Charlie Li]

Hi Mauricio,

The issue is resolved by adding "--txqflags=0xf00 --disable-hw-vlan", that
is,

sudo -E ./testpmd -c 0x3 -n 2 -- -i --txqflags=0xf00 --disable-hw-vlan
--portmask=0x3 --nb-cores=1

Thanks,
Charlie

On Fri, Aug 26, 2016 at 9:38 AM, Charlie Li <charlie.li at gmail.com> wrote:

> Thanks Mauricio,
>
> OVS - 2.5.0
> DPDK - 2.2.0
> QEMU - 2.4.1
>
> I used the ${DPDK_PATH}/tools/setup.sh to set up the environment including
> binding interfaces.
>
> after starting the setup.sh script,
>
> 1) select option 14                          // build DPDK
> 2) select option 17                          // start ign_uio
> 3) select option 20  then 512           // allocate hugepages
> 4) option 23 then 0000:00:03.0        // bind the first interface to DPDK
> 5) option 23 then 0000:00:04.0        // bind the second interface to DPDK
> 6) option 34                                   // exit setup.sh script
>
> cd ${DPDK_PATH}/app/test-pmd
> make
> sudo -E ./testpmd -c 0x3 -n 2 -- -i --portmask=0x3 --nb-cores=1
>
> This is where I got the errors.
>
> But I can use l2fwd without any problem
>
> cd ${RTE_SDK}/examples/l2fwd
> make
> sudo -E ./build/l2fwd -c 0x3 -n 2 -- -p 0x3
>
> Regards,
> Charlie
>
> On Fri, Aug 26, 2016 at 8:12 AM, Mauricio Vasquez <
> mauricio.vasquez at polito.it> wrote:
>
>> Hello Charlie,
>> On 08/25/2016 02:30 PM, Charlie Li wrote:
>>
>> Hi All,
>>
>> My host and VM both are running Fedora 23.
>>
>> In the host, DPDK (testpmd, l2fwd and l3fwd) works fine.
>>
>> Then I set up OVS with DPDK and pass two (dpdkvhostuser) ports to the VM.
>>
>> In the VM, l2fwd works fine, but testpmd fails to start. Pleas see the
>> attached screenshot of the VM with error messages.
>>
>> Has anybody seen similar issue in the VM?
>>
>> Thanks,
>>
>> Charlie
>>
>>
>> _______________________________________________
>> discuss mailing listdiscuss at openvswitch.orghttp://openvswitch.org/mailman/listinfo/discuss
>>
>>
>> My first thought is that it is a DPDK issue, but more information is
>> needed.
>> Could you please provide some more details?
>> - OvS, DPDK and QEMU versions you are using.
>> - The exact steps you perform in the guest before starting the testpmd
>> application, specifically how do you bind the virtio interfaces to DPDK.
>>
>> Thanks,
>>
>> Mauricio V.
>>
>>
>>
>
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