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

[Srinivasreddy R]

hi Mike,
Thanks for our detailed explanation of your example . usually i do similar
to u and i am aware of working with dpdk applications .
my problem is :
1. i have written a code for  host to guest communication .[taken form
usvhost which is developed in ovdk vswitch] .
2. i launched VM with two  interfaces .
3. i am able to send and receive traffic to and from guest to host on these
interfaces .
4. when i  try to bind these interfaces to igb_uio  to run dpdk application
. i am not able to access my instance . it got struck and not responding .
i need to hard reboot the vm.

My Question is  :
surely i might done something wrong in code . as my VM is not able to
access any more when i try to bind interfaces to igb_uio  . not able to
debug the issue .
someone please help me in figuring the issue . i dont find anything in
/var/log/messages after relaunching the instance .


thanks,
srinivas.



On Thu, Feb 26, 2015 at 8:42 PM, Polehn, Mike A <mike.a.polehn at intel.com>
wrote:

> In this example, the control network 00:03.0, remains unbound to UIO
> driver but remains attached
>  to Linux device driver (ssh access with putty) and just the target
> interfaces are bound.
> Below, it shows all 3 interfaces bound to the uio driver, which are not
> usable until a task uses the UIO driver.
>
> [root at F21vm l3fwd-vf]# lspci -nn
> 00:00.0 Host bridge [0600]: Intel Corporation 440FX - 82441FX PMC [Natoma]
> [8086:1237] (rev 02)
> 00:01.0 ISA bridge [0601]: Intel Corporation 82371SB PIIX3 ISA
> [Natoma/Triton II] [8086:7000]
> 00:01.1 IDE interface [0101]: Intel Corporation 82371SB PIIX3 IDE
> [Natoma/Triton II] [8086:7010]
> 00:01.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI
> [8086:7113] (rev 03)
> 00:02.0 VGA compatible controller [0300]: Cirrus Logic GD 5446 [1013:00b8]
> 00:03.0 Ethernet controller [0200]: Red Hat, Inc Virtio network device
> [1af4:1000]
> 00:04.0 Ethernet controller [0200]: Intel Corporation XL710/X710 Virtual
> Function [8086:154c] (rev 01)
> 00:05.0 Ethernet controller [0200]: Intel Corporation XL710/X710 Virtual
> Function [8086:154c] (rev 01)
>
> [root at F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py
> --bind=igb_uio 00:04.0
> [root at F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py
> --bind=igb_uio 00:05.0
> [root at F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py --status
>
> Network devices using DPDK-compatible driver
> ============================================
> 0000:00:04.0 'XL710/X710 Virtual Function' drv=igb_uio unused=i40evf
> 0000:00:05.0 'XL710/X710 Virtual Function' drv=igb_uio unused=i40evf
>
> Network devices using kernel driver
> ===================================
> 0000:00:03.0 'Virtio network device' if= drv=virtio-pci
> unused=virtio_pci,igb_uio
>
> Other network devices
> =====================
> <none>
>
> -----Original Message-----
> From: Dpdk-ovs [mailto:dpdk-ovs-bounces at lists.01.org] On Behalf Of
> Srinivasreddy R
> Sent: Thursday, February 26, 2015 6:11 AM
> To: dev at dpdk.org; dpdk-ovs at lists.01.org
> Subject: [Dpdk-ovs] problem in binding interfaces of virtio-pci on the VM
>
> 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
>
>
>
>
> ----------
> thanks
> srinivas.
> _______________________________________________
> Dpdk-ovs mailing list
> Dpdk-ovs at lists.01.org
> https://lists.01.org/mailman/listinfo/dpdk-ovs
>



-- 
thanks
srinivas.