[dpdk-dev] PMD architecture related to code

kuldeep.samasi at wipro.com kuldeep.samasi at wipro.com
Sat Mar 14 08:52:09 CET 2015


Thank for replay Bruce ,

I am looking code related to NIC to DMA mapping and DMA to user space .


Suggestions are welcome .

Regards,
Kuldeep

-----Original Message-----
From: Bruce Richardson [mailto:bruce.richardson at intel.com]
Sent: Friday, March 13, 2015 8:22 PM
To: Kuldeep Samasi (WT01 - Global Media & Telecom)
Cc: dev at dpdk.org; dev-bounces at dpdk.org
Subject: Re: [dpdk-dev] PMD architecture related to code

On Fri, Mar 13, 2015 at 04:45:47AM +0000, kuldeep.samasi at wipro.com wrote:
> Hi Developer Team ,
>
>
> I am trying add new functionality on Poll Mode driver .
> But I don't have idea how packets are coming to kernel mode and going to user space and doing packet processing DPDK .

The packets never go into the kernel when DPDK is in use. Instead the DPDK PMD configures the NIC to DMA the packets directly into userspace buffers. Hence the high performance.

/Bruce

>
> I need suggestion on which file the PMD architecture defined .
>
>
>
> Regards ,
> Kuldeep
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