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Message-ID: <3712a200-e0c0-4c86-ab6e-fef5810a2bd4@amd.com>
Date: Wed, 16 Oct 2024 09:11:44 +0100
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Subject: Re: [PATCH v5 1/1] testpmd: add hairpin-map parameter
To: Gregory Etelson <getelson@nvidia.com>, aman.deep.singh@intel.com,
 dev@dpdk.org
Cc: david.marchand@redhat.com, mkashani@nvidia.com, thomas@monjalon.net,
 yuying.zhang@intel.com, Dariusz Sosnowski <dsosnowski@nvidia.com>
References: <f726aa50-97b0-4e7b-82fc-d51ee2090d47@amd.com>
 <20240922065053.996568-1-getelson@nvidia.com>
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On 9/22/2024 7:50 AM, Gregory Etelson wrote:
> Hairpin offloads packet forwarding between ports.
> Packet is expected on Rx port <rp>, Rx queue <rq> and is forwarded
> to Tx port <tp> Tx queue <tq>.
> 
> Testpmd implements a static hairpin configuration scheme.
> 
> The new parameter allows explicit selection of Rx and Tx ports and
> queues in hairpin configuration.
> The new `hairpin-map` parameter is provided with 5 parameters,
> separated by `:`
> 
> `--hairpin-map=Rx port id:Rx queue:Tx port id:Tx queue:queues number`
> 
> Testpmd operator can provide several `hairpin-map` parameters for
> different hairpin maps.
> Example:
> 
> dpdk-testpmd <EAL params> -- \
>   <testpmd params> \
>   --rxq=2 --txq=2 --hairpinq=2 --hairpin-mode=0x12 \
>   --hairpin-map=0:2:1:2:1 \ # [1]
>   --hairpin-map=0:3:2:2:3   # [2]
> 
> Hairpin map [1] binds Rx port 0, queue 2 with Tx port 1, queue 2.
> Hairpin map [2] binds
>   Rx port 0, queue 3 with Tx port 2, queue 2,
>   Rx port 0, queue 4 with Tx port 2, queue 3,
>   Rx port 0, queue 5 with Tx port 2, queue 4.
> 
> The new `hairpin-map` parameter is optional.
> If omitted, testpmd will create "default" hairpin maps.
> 
> Signed-off-by: Gregory Etelson <getelson@nvidia.com>
> Acked-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
>

Hi Aman, reminder of this patch.