Re: [dpdk-dev] DPDK OVS on Ubuntu 14.04

["Gray, Mark D" <mark.d.gray@intel.com>]

+ discuss@openvswitch.org

one comment below: 

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Polehn, Mike A
> Sent: Tuesday, December 1, 2015 2:46 PM
> To: Abhijeet Karve; dev@dpdk.org
> Cc: bhavya.addep@gmail.com
> Subject: Re: [dpdk-dev] DPDK OVS on Ubuntu 14.04
> 
> May need to setup huge pages on kernel boot line (this is example, you may
> need to adjust):
> 
> The huge page configuration can be added to the default configuration file
> /etc/default/grub by adding to the GRUB_CMDLINE_LINUX and the grub
> configuration file regenerated to get an updated configuration file for Linux
> boot.
> # vim /etc/default/grub            // edit file
> 
> . . .
> GRUB_CMDLINE_LINUX_DEFAULT="... default_hugepagesz=1GB
> hugepagesz=1GB hugepages=4 hugepagesize=2m hugepages=2048 ..."
> . . .
> 
> 
> This example sets up huge pages for both 1 GB pages for 4 GB of 1 GB
> hugepage memory and 2 MB pages for 4 GB of 2 MB hugepage memory.
> After boot the number of 1 GB pages cannot be changed, but the number of
> 2 MB pages can be changed.
> 
> After editing configuration file /etc/default/grub , the new grub.cfg boot file
> needs to be regenerated:
> # update-grub
> 
> And reboot. After reboot memory managers need to be setup:
> 
> If /dev/hugepages does not exist:    # mkdir /dev/hugepages
> 
> # mount -t hugetlbfs nodev   /dev/hugepages
> 
> # mkdir /dev/hugepages_2mb
> # mount -t hugetlbfs nodev /dev/hugepages_2mb -o pagesize=2MB
> 
> Mike
> 
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Abhijeet Karve
> Sent: Monday, November 30, 2015 10:14 PM
> To: dev@dpdk.org
> Cc: bhavya.addep@gmail.com
> Subject: [dpdk-dev] DPDK OVS on Ubuntu 14.04
> 
> Dear All,
> 
> 
> We are trying to install DPDK OVS on top of the openstack juno in Ubuntu
> 14.04 single server. We are referring following steps for executing the same.
> 
> https://software.intel.com/en-us/blogs/2015/06/09/building-vhost-user-for-
> ovs-today-using-dpdk-200
> 
> During execution we are getting some issues with ovs-vswitchd service as its
> getting hang during starting.
> __________________________________________________________
> _______________
> 
> nfv-dpdk@nfv-dpdk:~$ tail -f /var/log/openvswitch/ovs-vswitchd.log
> 2015-11-
> 24T10:54:34.036Z|00006|reconnect|INFO|unix:/var/run/openvswitch/db.so
> ck:
> connecting...
> 2015-11-
> 24T10:54:34.036Z|00007|reconnect|INFO|unix:/var/run/openvswitch/db.so
> ck:
> connected
> 2015-11-24T10:54:34.064Z|00008|bridge|INFO|ovs-vswitchd (Open vSwitch)
> 2.4.90
> 2015-11-24T11:03:42.957Z|00002|vlog|INFO|opened log file
> /var/log/openvswitch/ov
>                                                                  s-vswitchd.log 2015-11-
> 24T11:03:42.958Z|00003|ovs_numa|INFO|Discovered 24 CPU cores on
> NUMA
> nod
> e 0
> 2015-11-24T11:03:42.958Z|00004|ovs_numa|INFO|Discovered 24 CPU cores
> on NUMA
> nod
> e 1
> 2015-11-24T11:03:42.958Z|00005|ovs_numa|INFO|Discovered 2 NUMA
> nodes and
> 48 CPU
>                                          cores
> 2015-11-
> 24T11:03:42.958Z|00006|reconnect|INFO|unix:/var/run/openvswitch/db.so
> ck:
> connecting...
> 2015-11-
> 24T11:03:42.958Z|00007|reconnect|INFO|unix:/var/run/openvswitch/db.so
> ck:
> connected
> 2015-11-24T11:03:42.961Z|00008|bridge|INFO|ovs-vswitchd (Open vSwitch)
> 2.4.90
> __________________________________________________________
> _______________
> 
> Also, attaching output(Hugepage.txt) of  “ ./ovs-vswitchd --dpdk -c 0x0FF8 -n
> 4 --socket-mem 1024,0 -- --log-file=/var/log/openvswitch/ovs-vswitchd.log
> --pidfile=/var/run/oppenvswitch/ovs-vswitchd.pid”
> 
> -          We tried seting up echo 0 >
> /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages, but couldn’t
> succeeded.
>       Can anyone please help us in getting the things if we are missing any and
> causing ovs-vswitchd to stuck while starting?
> 
> Also, when we create vm in openstack with DPDK OVS, dpdkvhost-user type
> interfaces are getting created automatically. If this interfaces are getting
> mapped with regular br-int bridge rather than DPDK bridge br0 then is this

You can still have a bridge named br-int  that is backed with a userspace datapath. You can't add
a dpdkvhostuser port to a kernel space datapath. So in this case, I think you are ok and are
using DPDK.

> mean that we have successfully enabled DPDK with netdev datapath?
> 
> 
> 
> We really appreciate for all the advice if you have.
> 
> Thanks,
> Abhijeet
> Thanks & Regards
> Abhijeet Karve
> 
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