[dpdk-users] Capture traffic with DPDK-dump

[jose suarez]

Hi,

I made a test using the linux kernel to capture packets with the testpmd 
app. In this way I used the following command:

# sudo ./x86_64-native-linuxapp-gcc/app/testpmd -c '0xfc' -n 4 --vdev 
'eth_pcap0,rx_iface=eth0,tx_pcap=/tmp/file.pcap' -- --port-topology=chained


I show below the output in this case:

EAL: Detected 8 lcore(s)
EAL: Probing VFIO support...
EAL: VFIO support initialized
PMD: Initializing pmd_pcap for eth_pcap0
PMD: Creating pcap-backed ethdev on numa socket 0
PMD: bnxt_rte_pmd_init() called for (null)
EAL: PCI device 0000:01:00.0 on NUMA socket -1
EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
USER1: create a new mbuf pool <mbuf_pool_socket_0>: n=187456, size=2176, 
socket=0
Configuring Port 0 (socket 0)
Port 0: XX:XX:XX:XX:XX:XX
Checking link statuses...
Port 0 Link Up - speed 10000 Mbps - full-duplex
Done
No commandline core given, start packet forwarding
io packet forwarding - ports=1 - cores=1 - streams=1 - NUMA support 
disabled, MP over anonymous pages disabled
Logical Core 3 (socket 0) forwards packets on 1 streams:
   RX P=0/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00

   io packet forwarding - CRC stripping disabled - packets/burst=32
   nb forwarding cores=1 - nb forwarding ports=1
   RX queues=1 - RX desc=128 - RX free threshold=0
   RX threshold registers: pthresh=0 hthresh=0 wthresh=0
   TX queues=1 - TX desc=512 - TX free threshold=0
   TX threshold registers: pthresh=0 hthresh=0 wthresh=0
   TX RS bit threshold=0 - TXQ flags=0x0
Press enter to exit

Telling cores to stop...
Waiting for lcores to finish...

   ---------------------- Forward statistics for port 0 
----------------------
   RX-packets: 1591270        RX-dropped: 0             RX-total: 1591270
   TX-packets: 1591270        TX-dropped: 0             TX-total: 1591270
----------------------------------------------------------------------------

   +++++++++++++++ Accumulated forward statistics for all 
ports+++++++++++++++
   RX-packets: 1591270        RX-dropped: 0             RX-total: 1591270
   TX-packets: 1591270        TX-dropped: 0             TX-total: 1591270
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Done.

Shutting down port 0...
Stopping ports...
Done
Closing ports...
Done

Bye...

Once I interrupt the app I can see that packets are recorded and also 
the pcap was generated. So I receive the traffic correctly. It seems 
that the problem happens when I install the uio_pci_generic driver for 
the NIC.


Thanks a lot!

José.


El 10/11/16 a las 14:20, Pattan, Reshma escribió:
> Hi,
>
> Comments below.
>
> Thanks,
> Reshma
>
>> -----Original Message-----
>> From: jose suarez [mailto:jsuarezv at ac.upc.edu]
>> Sent: Thursday, November 10, 2016 12:32 PM
>> To: Pattan, Reshma <reshma.pattan at intel.com>
>> Cc: users at dpdk.org
>> Subject: Re: [dpdk-users] Capture traffic with DPDK-dump
>>
>> Hi,
>>
>> Thank you very much for your response. I followed your comment about the
>> full PCI id and now the PDUMP application is working fine :). It creates the
>> pcap file.
>>
>> My problem now is that I noticed that in the testpmd app I don't receive any
>> packets. I write below the commands that I use to execute both apps:
>>
>> # sudo ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x06 -n 4 --proc-type
>> primary --socket-mem 1000 --file-prefix pg1 -w 0000:01:00.0 -- -i --port-
>> topology=chained
>>
>> # sudo ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -c 0xf8 -n 4 --proc-
>> type auto --socket-mem 1000 --file-prefix pg2 -w 0000:01:00.0 -- --pdump
>> 'device_id=0000:01:00.0,queue=*,rx-dev=/tmp/file.pcap'
>>
>> Before I execute these commands, I ensure that all the hugepages are free
>> (sudo rm -R /dev/hugepages/*)
>>
>> In this way I split up the hugepages (I have 2048 in total) between both
>> processes, as Keith Wiles advised me. Also I don't overlap any core with the
>> masks used (0x06 and 0xf8)
>>
>> My NIC (Intel 82599ES), which PCI id is 0000:01:00.0, it is connected to a 10G
>> link that receives traffic from a mirrored port. I show you the internet device
>> settings related to this NIC:
>>
>> Network devices using DPDK-compatible driver
>> ============================================
>> 0000:01:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection'
>> drv=igb_uio unused=ixgbe
>>
>>
>> When I run the testpmd app and check the port stats, I get the following
>> output:
>>
>> #sudo ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x06 -n 4 --proc-
>> type=auto --socket-mem 1000 --file-prefix pg1 -w 0000:01:00.0 -- -i --port-
>> topology=chained
>> EAL: Detected 8 lcore(s)
>> EAL: Auto-detected process type: PRIMARY
>> EAL: Probing VFIO support...
>> PMD: bnxt_rte_pmd_init() called for (null)
>> EAL: PCI device 0000:01:00.0 on NUMA socket 0
>> EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
>> Interactive-mode selected
>> USER1: create a new mbuf pool <mbuf_pool_socket_0>: n=155456,
>> size=2176,
>> socket=0
>> Configuring Port 0 (socket 0)
>> Port 0: XX:XX:XX:XX:XX:XX
>> Checking link statuses...
>> Port 0 Link Up - speed 10000 Mbps - full-duplex Done
>> testpmd> show port stats 0
>
> After testpmd comes to the prompt, you need to execute command "start". This will start traffic forwarding.
>
>>     ######################## NIC statistics for port 0
>> ########################
>>     RX-packets: 0          RX-missed: 0          RX-bytes:  0
>>     RX-errors: 0
>>     RX-nombuf:  0
>>     TX-packets: 0          TX-errors: 0          TX-bytes:  0
>>
>>     Throughput (since last show)
>>     Rx-pps:            0
>>     Tx-pps:            0
>> ################################################################
>> ############
>>
>> It doesn't receive any packet. Did I missed any step in the configuration of
>> the testpmd app?
> I am wondering , you should see all packets hitting Rx-missed.
> So I suggest just stop everything. Unbind port back to Linux. Then check if the port is receiving packets from other end using tcpdump.
> If not then you may need to debug the issue.
>
> After everything is fine, bind back the port to dpdk, run testpmd and see if you could receive packets or not.
> If you are seeing packets against "Rx-missed", then run start command in testpmd prompt to start packet forwarding. After that you will be able to
> See the packets in the capture file.
>
> Thanks,
> Reshma
>