[dpdk-dev] problem in binding interfaces of virtio-pci on the VM

[Srinivasreddy R <srinivasreddy4390@gmail.com>]

hi ,
I have written sample program for usvhost  supported by ovdk.

i have initialized VM using the below command .
On the VM :

I am able to see two interfaces . and working fine with traffic in
rawsocket mode .
my problem is when i bind the interfaces to pmd driver[ ibg_uio ] my
virtual machine is getting hanged . and  i am not able to access it further
.
now my question is . what may be the reason for the behavior . and how can
in debug the root cause .
please help in finding out the problem .



 ./tools/dpdk_nic_bind.py --status

Network devices using DPDK-compatible driver
============================================
<none>

Network devices using kernel driver
===================================
0000:00:03.0 '82540EM Gigabit Ethernet Controller' if=ens3 drv=e1000
unused=igb_uio *Active*
0000:00:04.0 'Virtio network device' if= drv=virtio-pci unused=igb_uio
0000:00:05.0 'Virtio network device' if= drv=virtio-pci unused=igb_uio

Other network devices
=====================
<none>


./dpdk_nic_bind.py --bind=igb_uio 00:04.0 00:05.0



./x86_64-softmmu/qemu-system-x86_64 -cpu host -boot c  -hda
/home/utils/images/vm1.img  -m 2048M -smp 3 --enable-kvm -name 'VM1'
-nographic -vnc :1 -pidfile /tmp/vm1.pid -drive
file=fat:rw:/tmp/qemu_share,snapshot=off -monitor
unix:/tmp/vm1monitor,server,nowait  -net none -no-reboot -mem-path
/dev/hugepages -mem-prealloc -netdev
type=tap,id=net1,script=no,downscript=no,ifname=usvhost1,vhost=on -device
virtio-net-pci,netdev=net1,mac=00:16:3e:00:03:03,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off
-netdev type=tap,id=net2,script=no,downscript=no,ifname=usvhost2,vhost=on
-device
virtio-net-pci,netdev=net2,mac=00:16:3e:00:03:04,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off




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thanks
srinivas.