[dpdk-stable] [PATCH] net/mlx5: fix vectorized Rx burst termination

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: Alexander Kozyrev <akozyrev at mellanox.com>
> Sent: Tuesday, June 2, 2020 6:51 AM
> To: dev at dpdk.org
> Cc: stable at dpdk.org; Raslan Darawsheh <rasland at mellanox.com>; Slava
> Ovsiienko <viacheslavo at mellanox.com>
> Subject: [PATCH] net/mlx5: fix vectorized Rx burst termination
> 
> Maximum burst size of Vectorized Rx burst routine is set to
> MLX5_VPMD_RX_MAX_BURST(64). This limits the performance of any
> application that would like to gather more than 64 packets from
> the single Rx burst for batch processing (i.e. VPP).
> 
> The situation gets worse with a mix of zipped and unzipped CQEs.
> They are processed separately and the Rx burst function returns
> small number of packets every call.
> 
> Repeat the cycle of gathering packets from the vectorized Rx routine
> until a requested number of packets are collected or there are no
> more CQEs left to process.
> 
> Fixes: 6cb559d67b83 ("net/mlx5: add vectorized Rx/Tx burst for x86")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Alexander Kozyrev <akozyrev at mellanox.com>
> Acked-by: Slava Ovsiienko <viacheslavo at mellanox.com>
> ---
>  drivers/net/mlx5/mlx5_rxtx_vec.c         | 19 +++++++++++++------
>  drivers/net/mlx5/mlx5_rxtx_vec_altivec.h | 13 ++++++++++---
>  drivers/net/mlx5/mlx5_rxtx_vec_neon.h    | 13 ++++++++++---
>  drivers/net/mlx5/mlx5_rxtx_vec_sse.h     | 13 ++++++++++---
>  4 files changed, 43 insertions(+), 15 deletions(-)
> 

Patch applied to next-net-mlx,

Kindest regards
Raslan Darawsheh