[ovs-dev] [dpdk-ovs] Memory allocation error while trying to add a dpdk mode port to ovs bridge

[Mauricio Vásquez]

Hi Alex,

This problem usually happens when there is not memory allocated to DPDK in
the socket where the port is connected to. Please use the dpdk-socket-mem
option to set the amount of memory for DPDK in the different NUMA sockets,

Example:

ovs-vsctl --no-wait set Open_vSwitch . other_config:dpdk-socket-mem="1024,1024"

Mauricio V,


On Mon, Jun 20, 2016 at 9:25 AM, gowrishankar <
gowrishankar.m at linux.vnet.ibm.com> wrote:

> On Monday 20 June 2016 08:21 AM, Wang, Alex wrote:
>
>> Hi There,
>>
>> I downloaded the master branch from github and tried to setup OVS with
>> DPDK mode under Ubuntu16.04 kernel_4.4.0-21-generic. However I encountered
>> below error while I was trying to add a dpdk port to the OVS bridge.
>>
>
> Is this an issue if you run ovs-vswitchd without --detach option ? (ie not
> as detached process) ?.
>
> Thanks,
> Gowrishankar
>
>
>
>> Error messages:
>> root at unassigned-hostname:/opt/APP/utility/dpdk-16.04/tools# ovs-vsctl
>> add-br br0 -- set bridge br0 datapath_type=netdev
>> root at unassigned-hostname:/opt/APP/utility/dpdk-16.04/tools# ovs-vsctl
>> add-port br0 dpdk0 -- set Interface dpdk0 type=dpdk
>> ovs-vsctl: Error detected while setting up 'dpdk0'.  See ovs-vswitchd log
>> for detail
>> root at unassigned-hostname:/home/pid# ovs-vsctl show
>> f8269232-4bf8-455b-9b34-e9c646905782
>>      Bridge "br0"
>>          Port "dpdk0"
>>              Interface "dpdk0"
>>                  type: dpdk
>>                  error: "could not open network device dpdk0 (Cannot
>> allocate memory)"
>>          Port "br0"
>>              Interface "br0"
>>                  type: internal
>>
>>
>> I followed the INSTALL.DPDK.md<
>> https://github.com/openvswitch/ovs/blob/master/INSTALL.DPDK.md> but this
>> error was consistently hit on Ubuntu16.04. Previously we tried OVS on
>> Ubuntu14.04 but it looked fine without this failure. Did you see any
>> similar error on your side or any comments about the failure?
>>
>> Thanks a lot in advance!
>>
>> Best Regards,
>> Alex
>>
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>>
>
>
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