[dpdk-users] Capture traffic with DPDK-dump

[jose suarez <jsuarezv@ac.upc.edu>]

Hello everybody!

I am new in DPDK. I'm trying simply to capture traffic from a 10G 
physical NIC. I installed the DPDK from source files and activated the 
following modules in common-base file:

CONFIG_RTE_LIBRTE_PMD_PCAP=y

CONFIG_RTE_LIBRTE_PDUMP=y

CONFIG_RTE_PORT_PCAP=y

Then I built the distribution using the dpdk-setup.h script. Also I add 
hugepages and check they are configured successfully:

AnonHugePages:      4096 kB
HugePages_Total:    2048
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB

To capture the traffic I guess I can use the dpdk-pdump application, but 
I don't know how to use it. First of all, does it work if I bind the 
interfaces using the uio_pci_generic drive? I guess that if I capture 
the traffic using the linux kernel driver (ixgbe) I will loose a lot of 
packets.

To bind the NIC I write this command:

sudo ./tools/dpdk-devbind.py --bind=uio_pci_generic eth0


When I check the interfaces I can see that the NIC was binded 
successfully. Also I checked that mi NIC is compatible with DPDK (Intel 
8599)

Network devices using DPDK-compatible driver
============================================
0000:01:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' 
drv=uio_pci_generic unused=ixgbe,vfio-pci


To capture packets, I read in the mailing list that it is necessary to 
run the testpmd application and then dpdk-pdump using different cores. 
So I used the following commands:

sudo ./x86_64-native-linuxapp-gcc/app/testpmd -c 0x6 -n 4 -- -i

sudo ./x86_64-native-linuxapp-gcc/app/dpdk-pdump -c 0xff -n 2 -- --pdump 
'device_id=01:00.0,queue=*,rx-dev=/tmp/file.pcap'

Did I miss any step? Is it necessary to execute any more commands when 
running the testpmd app in interactive mode?


When I execute the pdump application I get the following error:

EAL: Detected 8 lcore(s)
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in 
the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
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
EAL: PCI device 0000:01:00.1 on NUMA socket -1
EAL:   probe driver: 8086:10fb rte_ixgbe_pmd
PMD: Initializing pmd_pcap for eth_pcap_rx_0
PMD: Creating pcap-backed ethdev on numa socket 0
Port 2 MAC: 00 00 00 01 02 03
PDUMP: client request for pdump enable/disable failed
PDUMP: client request for pdump enable/disable failed
EAL: Error - exiting with code: 1
   Cause: Unknown error -22


In the testpmd app I get the following info:

EAL: Detected 8 lcore(s)
EAL: Probing VFIO support...
EAL: VFIO support initialized
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
EAL: PCI device 0000:01:00.1 on NUMA socket -1
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: 00:E0:ED:FF:60:5C
Configuring Port 1 (socket 0)
Port 1: 00:E0:ED:FF:60:5D
Checking link statuses...
Port 0 Link Up - speed 10000 Mbps - full-duplex
Port 1 Link Up - speed 10000 Mbps - full-duplex
Done
testpmd> PDUMP: failed to get potid for device id=01:00.0
PDUMP: failed to get potid for device id=01:00.0


Could you please help me?

Thank you!