[ovs-discuss] Hot-plugging a Physical Port with DPDK Failed

[Ramzah Rehman]

I bound  0000:04:00.0 with uio_pci_generic as follows:

 # modprobe uio_pci_generic
# $DPDK_DIR/usertools/dpdk-devbind.py --status
# sudo $DPDK_DIR/usertools/dpdk-devbind.py --bind=uio_pci_generic
0000:04:00.0

got same error in ovs-vswitched.log:

2018-12-3T08:21:40.430Z|00165|dpdk|ERR|EAL: Driver cannot attach the device
( 0000:04:00.0  )
2018-12-3T08:21:40.430Z|00166|dpdk|ERR|EAL: No port found for device (
0000:04:00.0  )
2018-12-3T08:21:40.430Z|00167|netdev_dpdk|WARN|Error attaching device
0000:04:00.0  ' to DPDK
2018-12-3T08:21:40.430Z|00168|netdev|WARN|dpdkx: could not set
configuration (Invalid argument)

Please help!!!

Best Regards,
Ramzah Rehman


On Fri, Nov 30, 2018 at 1:47 PM Ramzah Rehman <ramzahrehman at gmail.com>
wrote:

> Hi. I Have installed Open vSwitch 2.9.4 with DPDK 17.11.4 on Ubuntu
> 14.04.5 LTD and kernel version 4.4.0-31-generic on a server A following
> these two links:
> http://docs.openvswitch.org/en/latest/intro/install/dpdk/
>
> http://docs.openvswitch.org/en/latest/intro/install/general/#general-bootstrapping
>
> Now, when I run TCP client via iperf from server A to another server B, I
> get a bandwidth of around 350Mbps on 1000Mbps link. I have not bound any
> ports on server A to DPDK.  Please advise how can I reach bandwidth of
> around 1000Mbps in this setting.  Is it because I need to bind physical
> ports in use to DPDK driver?
>
> I have tried binding the physical port to DPDK (Hot-plugging) following
> this link: http://docs.openvswitch.org/en/latest/topics/dpdk/phy/
>
> #ovs-vsctl add-port OVS_BR_LEAF_0 dpdkx -- set Interface dpdkx type=dpdk
> options:dpdk-devargs=0000:03:02.0
>
> Error in ovs-vswitchd.log:
>
> 2018-11-30T08:21:40.430Z|00165|dpdk|ERR|EAL: Driver cannot attach the
> device (0000:03:02.0)
> 2018-11-30T08:21:40.430Z|00166|dpdk|ERR|EAL: No port found for device
> (0000:03:02.0)
> 2018-11-30T08:21:40.430Z|00167|netdev_dpdk|WARN|Error attaching device
> '0000:03:02.0' to DPDK
> 2018-11-30T08:21:40.430Z|00168|netdev|WARN|dpdkx: could not set
> configuration (Invalid argument)
>
> Useful information:
>
> #uname -r
> 4.4.0-31-generic
>
> #cat /proc/cmdline
> BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic
> root=UUID=286cabb9-ebd3-4b51-b1b2-8c139acb1d22 ro intel_iommu=on iommu=pt
> quiet splash vt.handoff=7
>
> #cat /etc/*release
> DISTRIB_ID=Ubuntu
> DISTRIB_RELEASE=14.04
> DISTRIB_CODENAME=trusty
> DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"
> NAME="Ubuntu"
> VERSION="14.04.5 LTS, Trusty Tahr"
> ID=ubuntu
> ID_LIKE=debian
> PRETTY_NAME="Ubuntu 14.04.5 LTS"
> VERSION_ID="14.04"
> HOME_URL="http://www.ubuntu.com/"
> SUPPORT_URL="http://help.ubuntu.com/"
> BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
>
> #/usr/src/dpdk-stable-17.11.4/usertools/dpdk-devbind.py --status
>
> Network devices using DPDK-compatible driver
> ============================================
> <none>
>
> Network devices using kernel driver
> ===================================
> 0000:00:19.0 'Ethernet Connection I217-LM 153a' if=eth2 drv=e1000e unused=
> *Active*
> 0000:03:02.0 'RTL8169 PCI Gigabit Ethernet Controller 8169' if=eth0
> drv=r8169 unused=
> 0000:04:00.0 'RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
> 8168' if=eth1 drv=r8169 unused=
>
> Other Network devices
> =====================
> <none>
>
> Crypto devices using DPDK-compatible driver
> ===========================================
> <none>
>
> Crypto devices using kernel driver
> ==================================
> <none>
>
> Other Crypto devices
> ====================
> <none>
>
> Eventdev devices using DPDK-compatible driver
> =============================================
> <none>
>
> Eventdev devices using kernel driver
> ====================================
> <none>
>
> Other Eventdev devices
> ======================
> <none>
>
> Mempool devices using DPDK-compatible driver
> ============================================
> <none>
>
> Mempool devices using kernel driver
> ===================================
> <none>
>
> Other Mempool devices
> =====================
> <none>
> #grep HugePages_ /proc/meminfo
>
> HugePages_Total:    1471
> HugePages_Free:      959
> HugePages_Rsvd:        0
> HugePages_Surp:        0
>
>
>
> Best Regards,
> Ramzah Rehman
>
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