* Tapping a Tx port to access all the packets being Txed
@ 2024-01-11 5:55 Nicolson Ken (ニコルソン ケン)
2024-01-11 17:04 ` Stephen Hemminger
0 siblings, 1 reply; 2+ messages in thread
From: Nicolson Ken (ニコルソン ケン) @ 2024-01-11 5:55 UTC (permalink / raw)
To: users
Hi all,
I'm wanting to basically tap a DPDK stream and for instance save all packets being Txed by a PMD to a separate file.
I know I could relatively easily modify an existing PMD to have two output ports, but is there either an existing PMD that does this, or a programmatic way to graft a second port onto an arbitrary PMD, or is there another simpler way that I haven't realised yet. As mbufs are already reference counted, I would hope, and require, that such a solution would be zero copy. RSS-friendly would also be a plus.
Thanks,
Ken
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Tapping a Tx port to access all the packets being Txed
2024-01-11 5:55 Tapping a Tx port to access all the packets being Txed Nicolson Ken (ニコルソン ケン)
@ 2024-01-11 17:04 ` Stephen Hemminger
0 siblings, 0 replies; 2+ messages in thread
From: Stephen Hemminger @ 2024-01-11 17:04 UTC (permalink / raw)
To: Nicolson Ken (ニコルソン ケン)
Cc: users
On Thu, 11 Jan 2024 05:55:53 +0000
Nicolson Ken (ニコルソン ケン) <ken.nicolson@jp.panasonic.com> wrote:
> Hi all,
>
> I'm wanting to basically tap a DPDK stream and for instance save all packets being Txed by a PMD to a separate file.
>
> I know I could relatively easily modify an existing PMD to have two output ports, but is there either an existing PMD that does this, or a programmatic way to graft a second port onto an arbitrary PMD, or is there another simpler way that I haven't realised yet. As mbufs are already reference counted, I would hope, and require, that such a solution would be zero copy. RSS-friendly would also be a plus.
>
> Thanks,
> Ken
You could use Tx callback to do this, or pdump, or pcap PMD.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2024-01-11 17:04 ` Stephen Hemminger
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