[ovs-discuss] Combined Kernel and DPDK with Same Interface

[Tonghao Zhang]

On Thu, Apr 9, 2020 at 12:07 PM Lazuardi Nasution
<mrxlazuardin at gmail.com> wrote:
>
> Hi Greg,
>
> Any concern I should know if I choose to use option No. 1? Something like what Tonghao tell on previous e-mail on this thread?
maybe different solution, about isolated mode, please  see:
https://doc.dpdk.org/guides/prog_guide/rte_flow.html#flow-isolated-mode

> Best regards,
>
> On Thu, Apr 9, 2020, 02:24 Gregory Rose <gvrose8192 at gmail.com> wrote:
>>
>>
>> On 4/8/2020 8:32 AM, Lazuardi Nasution wrote:
>> > Hi Greg,
>> >
>> > Thank you for your suggestion. But anyway, why don't you suggest No. 1?
>> >
>> > In term of using suggested No. 2 with MLX5 PMD, is representor port still
>> > needed? I assume that there is no need to communicate between PF and VF.
>> > Let's say, PF is used for Ceph storage and other kernel based (non-DPDK)
>> > services, VF is used for OVS-DPDK.
>>
>> Hi Lazuardi,
>>
>> the configuration matrix is dependent on your usage model.  Option No. 1
>> will work fine I'm sure and if it fits your needs then go with it.
>>
>> - Greg
>>
>> >
>> > Best regards,
>> >
>> > On Wed, Apr 8, 2020, 22:24 Gregory Rose <gvrose8192 at gmail.com> wrote:
>> >
>> >>
>> >> On 4/8/2020 5:50 AM, Lazuardi Nasution wrote:
>> >>> Hi,
>> >>>
>> >>> I'm looking for best practice or experience on running OVS-DPDK and other
>> >>> kernel based applications with the same interface especially with MLX5
>> >> PMD.
>> >>> As long as I know, one of both must use VF and the other use PF
>> >>> since kernel and DPDK cannot bind to same interface. Which one of
>> >> following
>> >>> is possible and better?
>> >>>
>> >>> 1. OVS-DPDK bind to PF and kernel bind to VF
>> >>> 2.  OVS-DPDK bind to VF and kernel bind to PF
>> >>>
>> >>> If it is better (or the only possible) to use No. 2, what version of OVS
>> >>> and DPDK support VF binding? Should I bind to kernel created VF directly
>> >> or
>> >>> it's representor?
>> >>
>> >> If you use option 2 then the Linux kernel has PCI-e primitives that
>> >> support the allocation of the VF resources, including number of VFs,
>> >> their permissions and settings of any offload capabilities that the VFs
>> >> might have.
>> >>
>> >> - Greg
>> >>
>> >>
>> >
>
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-- 
Best regards, Tonghao