[dpdk-dev] Strange behavior with dpdk-2.0.0/examples/rxtx_callbacks

[Abhishek Verma]

Hi,

I am trying to understand DPDK and i
modified dpdk-2.0.0/examples/rxtx_callbacks so that i get a message
whenever i RX and TX a frame.

I added a printf in add_timestamps() and calc_latency() to know whenever i
am able to RX and TX a packet along with the # of pkts that i get --
print nb_pkts.

When i run i see that i am continuously getting packets that i try to TX
out. This is odd, because i was expecting to only see the frames that i
would especially send to the port that is DPDK enabled.

Is this the expected behavior?

Would be great if you guys can tell me in case i am missing something.

Screen SHOTS:

akabra at VirtualBox:~/dpdk/dpdk-2.0.0/examples/rxtx_callbacks$
dpdk_nic_bind.py --status
Network devices using DPDK-compatible driver
============================================
0000:00:08.0 '82545EM Gigabit Ethernet Controller (Copper)' drv=igb_uio
unused=uio_pci_generic
0000:00:09.0 '82545EM Gigabit Ethernet Controller (Copper)' drv=igb_uio
unused=uio_pci_generic

Network devices using kernel driver
===================================
0000:00:03.0 '82540EM Gigabit Ethernet Controller' if=eth1 drv=e1000
unused=igb_uio,uio_pci_generic *Active*

Other network devices
=====================
<none>
akabra at VirtualBox:~/dpdk/dpdk-2.0.0/examples/rxtx_callbacks$


akabra at VirtualBox:~/dpdk/dpdk-2.0.0/examples/rxtx_callbacks$ sudo
build/rxtx_callbacks -c 1 -n 4
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Detected lcore 1 as core 1 on socket 0
EAL: Detected lcore 2 as core 2 on socket 0
EAL: Support maximum 128 logical core(s) by configuration.
EAL: Detected 3 lcore(s)
EAL: VFIO modules not all loaded, skip VFIO support...
EAL: Setting up memory...
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f7ec8e00000 (size = 0x200000)
EAL: Ask a virtual area of 0xa400000 bytes
EAL: Virtual area found at 0x7f7ebe800000 (size = 0xa400000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f7ebe400000 (size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f7ebe000000 (size = 0x200000)
EAL: Ask a virtual area of 0x15400000 bytes
EAL: Virtual area found at 0x7f7ea8a00000 (size = 0x15400000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7f7ea8600000 (size = 0x200000)
EAL: Requesting 256 pages of size 2MB from socket 0
EAL: TSC frequency is ~2594691 KHz
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable
clock cycles !
EAL: Master lcore 0 is ready (tid=ca023900;cpuset=[0])
PMD: ENICPMD trace: rte_enic_pmd_init
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   probe driver: 8086:100e rte_em_pmd
EAL:   Not managed by a supported kernel driver, skipped
EAL: PCI device 0000:00:08.0 on NUMA socket -1
EAL:   probe driver: 8086:100f rte_em_pmd
EAL:   PCI memory mapped at 0x7f7ec9000000
PMD: eth_em_dev_init(): port_id 0 vendorID=0x8086 deviceID=0x100f
EAL: PCI device 0000:00:09.0 on NUMA socket -1
EAL:   probe driver: 8086:100f rte_em_pmd
EAL:   PCI memory mapped at 0x7f7ec9fcd000
PMD: eth_em_dev_init(): port_id 1 vendorID=0x8086 deviceID=0x100f
PMD: eth_em_rx_queue_setup(): sw_ring=0x7f7ebf2f3a80 hw_ring=0x7f7ec8e41500
dma_addr=0xbf841500
PMD: eth_em_tx_queue_setup(): sw_ring=0x7f7ebf2f1980 hw_ring=0x7f7ec8e51500
dma_addr=0xbf851500
PMD: eth_em_start(): <<
Port 0 MAC: 08 00 27 f7 13 f5
PMD: eth_em_rx_queue_setup(): sw_ring=0x7f7ebf2f1280 hw_ring=0x7f7ec8e61500
dma_addr=0xbf861500
PMD: eth_em_tx_queue_setup(): sw_ring=0x7f7ebf2ef180 hw_ring=0x7f7ec8e71500
dma_addr=0xbf871500
PMD: eth_em_start(): <<
Port 1 MAC: 08 00 27 7b 2d b2

Core 0 forwarding packets. [Ctrl+C to quit]
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32
Getting a packet 32!
Txing Packets 32

Thanks, Abhishek