[ovs-dev] OVS is failing while starting with DPDK

Wed Jun 1 09:53:14 UTC 2016

From: Mauricio Vásquez [mailto:mauricio.vasquezbernal at studenti.polito.it]
Sent: Wednesday, June 1, 2016 11:47 AM
To: Wojciechowicz, RobertX <robertx.wojciechowicz at intel.com>
Cc: Sheroo Pratap <sheroopratapresearch at gmail.com>; ovs dev <dev at openvswitch.org>
Subject: Re: [ovs-dev] OVS is failing while starting with DPDK

Hi RobertX,

On Wed, Jun 1, 2016 at 11:26 AM, Wojciechowicz, RobertX <robertx.wojciechowicz at intel.com<mailto:robertx.wojciechowicz at intel.com>> wrote:
Hi Sheroo,

my suggestions inline

> -----Original Message-----
> From: dev [mailto:dev-bounces at openvswitch.org<mailto:dev-bounces at openvswitch.org>] On Behalf Of Sheroo
> Pratap
> Sent: Wednesday, June 1, 2016 10:48 AM
> To: ovs dev <dev at openvswitch.org<mailto:dev at openvswitch.org>>
> Subject: [ovs-dev] OVS is failing while starting with DPDK
>
> Hi All,
>
>   I am trying to start OVS with DPDK but it is failing with below error.
>
> root at osboxes:/home/osboxes/ovs# ovs-vswitchd unix:$DB_SOCK --pidfile
> --detach
> 2016-06-01T08:25:32Z|00001|ovs_numa|INFO|Discovered 1 CPU cores on
> NUMA
> node 0
> 2016-06-01T08:25:32Z|00002|ovs_numa|INFO|Discovered 1 NUMA nodes
> and 1 CPU
> cores
> 2016-06-
> 01T08:25:32Z|00003|reconnect|INFO|unix:/usr/local/var/run/openvswitch/
> db.sock:
> connecting...
> 2016-06-
> 01T08:25:32Z|00004|reconnect|INFO|unix:/usr/local/var/run/openvswitch/
> db.sock:
> connected
> *2016-06-01T08:25:32Z|00005|dpdk|ERR|DPDK not supported in this copy of
> Open vSwitch.*
> root at osboxes:/home/osboxes/ovs#
>
> Below is the steps is have followed so far.
>
> 1) My OVS version is master ovs i.e. 2.5.90, ubuntu 15.10 and kernel
> version is 4.6
> 2) DPDK version is 16.04  (as recommended in INSTALL.DPDK.md<http://INSTALL.DPDK.md> of master
> ovs)
> 3) Following are the steps as have executed as mentioned in
> INSTALL.DPDK.md<http://INSTALL.DPDK.md>
>         1)  export DPDK_DIR=/usr/src/dpdk-16.04
>         2)  cd $DPDK_DIR
>         3) make install T=x86_64-native-linuxapp-gcc DESTDIR=install
>         4) export DPDK_BUILD=$DPDK_DIR/x86_64-native-linuxapp-gcc/
>         5) cd $(OVS_DIR)/
>        6) ./boot.sh
>        7) ./configure --with-dpdk=$DPDK_BUILD CFLAGS="-g -O2
> -Wno-cast-align"
>        8) make CFLAGS='-O3 -march=native
>        9)  added below line in /etc/default/grub
>                default_hugepagesz=1GB hugepagesz=1G hugepages=1
>           Snapshot of grub
>              GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo
> Debian`
>              GRUB_CMDLINE_LINUX_DEFAULT="quiet splash
> default_hugepagesz=1GB hugepagesz=1G hugepages=1"
>              GRUB_CMDLINE_LINUX=""
>      10) modprobe uio
>      11) insmod $DPDK_BUILD/kmod/igb_uio.ko
>      12) $DPDK_DIR/tools/dpdk_nic_bind.py --bind=igb_uio eth0
>      13) mount -t hugetlbfs -o pagesize=2MB none /dev/hugepages
>      14) mkdir -p /usr/local/etc/openvswitch
>      15) mkdir -p /usr/local/var/run/openvswitch
>      16) rm /usr/local/etc/openvswitch/conf.db
>      17) ovsdb-tool create /usr/local/etc/openvswitch/conf.db  \
>              /usr/local/share/openvswitch/vswitch.ovsschema
>
>      18) removed SSL certificates while configuraing ovsdb :
>               ovsdb-server
> --remote=punix:/usr/local/var/run/openvswitch/db.sock
> --remote=db:Open_vSwitch,Open_vSwitch,manager_options  --pidfile --
> detach
[RW] Make sure that ovsdb server started successfully

>      19) ovs-vsctl --no-wait init
>      20) export DB_SOCK=/usr/local/var/run/openvswitch/db.sock
>      21) ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-init=true

[RW] Check in the database if dpdk-init value was written properly.
I saw situations where ovsdb server was not ready to work yet,
so writing to it was not possible. Waiting a few seconds before writing helped.

>
>
>
>
>
>
>
> * 22) faling here : ovs-vswitchd unix:$DB_SOCK --pidfile
> --detach            root at osboxes:/home/osboxes/ovs# ovs-vswitchd
> unix:$DB_SOCK --pidfile --detach
> 2016-06-01T08:25:32Z|00001|ovs_numa|INFO|Discovered 1 CPU cores on
> NUMA
> node 0            2016-06-01T08:25:32Z|00002|ovs_numa|INFO|Discovered 1
> NUMA nodes and 1 CPU cores
> 2016-06-
> 01T08:25:32Z|00003|reconnect|INFO|unix:/usr/local/var/run/openvswitch/
> db.sock:
> connecting...
> 2016-06-
> 01T08:25:32Z|00004|reconnect|INFO|unix:/usr/local/var/run/openvswitch/
> db.sock:
> connected            2016-06-01T08:25:32Z|00005|dpdk|ERR|DPDK not
> supported
> in this copy of Open vSwitch.*

[RW] This error message means that dpdk-init has not "true" value in db.

I am not pretty sure that the error message means that, according to my understanding it means that the dpdk-init is true but ovs was not built with DPDK support. You can look at the dpdk_init() function in lib/netdev-nodpdk.c, this is a stub used when there is not DPDK support.

[RW] Oh yes, you’re right. It seems that OVS is not built with DPDK support. Sorry for the confusion.

>
> Please anyone can help, after executing step 22 getting error "DPDK not
> supported in this copy of Open vSwitch"
>
> Thanks and Regards
>  S Pratap

Br,
Robert
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Mauricio V,