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

[Bruce Richardson]

On Thu, Feb 26, 2015 at 10:08:59PM +0530, Srinivasreddy R wrote:
> 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.

Are you sure you are not trying to access the vm via one of the interfaces
now bount to igb_uio? If you bind the interface you use for ssh to igb_uio, 
you won't be able to ssh to that vm any more.

/Bruce

> 
> 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.