> On 16 Mar 2015, at 15:18, Traynor, Kevin <kevin.tray...@intel.com> wrote:
> 
>> -----Original Message-----
>> From: dev [mailto:dev-boun...@openvswitch.org] On Behalf Of Daniele Di
>> Proietto
>> Sent: Thursday, March 12, 2015 6:05 PM
>> To: dev@openvswitch.org
>> Subject: [ovs-dev] [PATCH 0/6] DPDK: simplify configuration
>> 
>> This series improves OVS configuration with DPDK in three ways:
>> 
>> * netdev-dpdk is patched to work on smaller systems (without 1GB hugepages)
>>  or with smaller NICs (without lots of transmission queues).
>> * the 'other_config:nonpmd-cpu-mask' key is introduced: it can be used to
>>  limit OVS non PMD threads to a particular set of cores.
>> * the 'other_config:n-pmd-cores' key is introduced: it allows setting the
>>  number of PMD threads without specifing a CPU mask.
> 
> Hi, I've reviewed this patchset - few comments/questions on it… 

Hi Kevin, thanks

> I haven't tested yet - but I'm wondering what is the impact to the dpdk -c 
> parameter. Is it no longer used for OVS? 
> 

Yes, that’s correct. It should have no impact on OVS. I think we
should also provide a default, i.e. generate the parameters passed to
dpdk_eal_init at some point.

> At present the NON_PMD_CORE_ID define overrides the db settings (which is 
> clearly documented). Is it needed now that a db key is available? Perhaps 
> it would make things simpler that the define is overridden when a key is 
> specified?
> 

We check NON_PMD_CORE_ID often in the fast path.  I would prefer leaving it as
it is right now and removing this limitation later, making sure that it has no
impact on performance.

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