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* [dpdk-dev] AF_XDP PMD cannot use with software NICs
@ 2019-05-25  0:45 Yutaro Hayakawa
  2019-05-28  9:40 ` Burakov, Anatoly
  0 siblings, 1 reply; 2+ messages in thread
From: Yutaro Hayakawa @ 2019-05-25  0:45 UTC (permalink / raw)
  To: dev

Hello,

In current AF_XDP PMD implementation, we cannot use it with software NICs like VETH. Because it allocates umem with RTE_MEMZONE_IOVA_CONTIG.

Since AF_XDP itself is usable with any network devices, I think it is better to have option to take umem with RTE_MEMZONE_SIZE_HINT_ONLY. It is also useful for testing perpose or using DPDK from containers.

Any thought or future plan for this problem?

Thanks,
Yutaro

^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [dpdk-dev] AF_XDP PMD cannot use with software NICs
  2019-05-25  0:45 [dpdk-dev] AF_XDP PMD cannot use with software NICs Yutaro Hayakawa
@ 2019-05-28  9:40 ` Burakov, Anatoly
  0 siblings, 0 replies; 2+ messages in thread
From: Burakov, Anatoly @ 2019-05-28  9:40 UTC (permalink / raw)
  To: Yutaro Hayakawa, dev

On 25-May-19 1:45 AM, Yutaro Hayakawa wrote:
> Hello,
> 
> In current AF_XDP PMD implementation, we cannot use it with software NICs like VETH. Because it allocates umem with RTE_MEMZONE_IOVA_CONTIG.
> 
> Since AF_XDP itself is usable with any network devices, I think it is better to have option to take umem with RTE_MEMZONE_SIZE_HINT_ONLY. It is also useful for testing perpose or using DPDK from containers.

I'm not sure i understand the problem. IOVA_CONTIG has no relation to 
SIZE_HINT_ONLY - the former forces the allocation to be IOVA-contiguous. 
The latter allows to allocate from other page sizes when the requested 
one is not available, e.g. if you request memory with RTE_MEMZONE_1GB 
and RTE_MEMZONE_SIZE_HINT_ONLY, it will try to allocate from 1GB pages 
first, and if that fails, will allocate from any other page size 
available - but says nothing about whether that memory has to be 
IOVA-contiguous.

What is the problem with allocating IOVA-contiguous memory for AF_XDP 
and VETH?

> 
> Any thought or future plan for this problem?
> 
> Thanks,
> Yutaro
> 


-- 
Thanks,
Anatoly

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2019-05-25  0:45 [dpdk-dev] AF_XDP PMD cannot use with software NICs Yutaro Hayakawa
2019-05-28  9:40 ` Burakov, Anatoly

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