Hi,
> -----Original Message-----
> From: Viacheslav Ovsiienko <viachesl...@nvidia.com>
> Sent: Monday, April 5, 2021 12:59 PM
> To: dev@dpdk.org
> Cc: Raslan Darawsheh <rasl...@nvidia.com>; Matan Azrad
> <ma...@nvidia.com>; Ori Kam <or...@nvidia.com>; sta...@dpdk.org
> Subject: [PATCH] net/mlx5: fix the drop action for the DR/DV
>
> There are multiple branches in rdma-core library backing:
> the rte flows:
> - Verbs
> - Direct Verbs (DV)
> - Direct Rules (DR)
>
> The Verbs API always requires the specifying the queue even
> if there is the drop action in the flow, though the kernel
> optimizes out the actual queue usage for the flows containing
> the drop action. The PMD handles the dedicated Rx queue to
> provide Verbs API compatibility.
>
> The DV/DR API does not require explicit specifying the queue
> at the flow creation, but PMD still specified the dedicated
> drop queue as action. It performed the packet forwarding to
> the dummy queue (that was not polled at all) causing the
> steering pipeline resources usage and degrading the overall
> packet processing rate. For example, with inserted flow to
> drop all the ingress packets the statistics reported only
> 15Mpps of 64B packets were received over 100Gbps line.
>
> Since the Direct Rule API for E-Switch was introduced the
> rdma-core supports the dedicated drop action, that is recognized
> both for DV and DR and can be used for the entire device in
> unified fashion, regardless of steering domain. The similar drop
> action was introduced for E-Switch, the usage of this one can be
> extended for other steering domains, not for E-Switch's one only.
>
> This patch:
> - renames esw_drop_action to dr_drop_action to emphasize
> the global nature of the variable (not only E-Switch domain)
> - specifies this global drop action instead of dedicated
> drop queue for the DR/DV flows
>
> Cc: sta...@dpdk.org
> Fixes: 34fa7c0268e7 ("net/mlx5: add drop action to Direct Verbs E-Switch")
> Fixes: 65b3cd0dc39b ("net/mlx5: create global drop action")
>
> Signed-off-by: Viacheslav Ovsiienko <viachesl...@nvidia.com>
> Acked-by: Matan Azrad <ma...@nvidia.com>
> ---
Patch applied to next-net-mlx,
Kindest regards,
Raslan Darawsheh
