[dpdk-dev] [PATCH 07/12] net/bnxt: increase max burst size for vector mode

[Ferruh Yigit]

On 9/9/2020 4:53 PM, Lance Richardson wrote:
> Increase the maximum supported burst size for the bnxt vector
> mode PMD from 32 to 64.

What is the motivation here? Like does it improve the performance? If so in
which conditions etc.. It would be nice to describe the why & impact.

> 
> Reviewed-by: Kalesh Anakkur Purayil <kalesh-anakkur.purayil at broadcom.com>
> Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde at broadcom.com>
> Signed-off-by: Lance Richardson <lance.richardson at broadcom.com>
> ---
>  drivers/net/bnxt/bnxt_rxtx_vec_common.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/bnxt/bnxt_rxtx_vec_common.h b/drivers/net/bnxt/bnxt_rxtx_vec_common.h
> index 2f28759d06..fc2a12272b 100644
> --- a/drivers/net/bnxt/bnxt_rxtx_vec_common.h
> +++ b/drivers/net/bnxt/bnxt_rxtx_vec_common.h
> @@ -9,8 +9,8 @@
>  #include "bnxt_rxq.h"
>  #include "bnxt_rxr.h"
>  
> -#define RTE_BNXT_MAX_RX_BURST		32U
> -#define RTE_BNXT_MAX_TX_BURST		32U
> +#define RTE_BNXT_MAX_RX_BURST		64U
> +#define RTE_BNXT_MAX_TX_BURST		64U
>  #define RTE_BNXT_DESCS_PER_LOOP		4U
>  
>  #define TX_BD_FLAGS_CMPL ((1 << TX_BD_LONG_FLAGS_BD_CNT_SFT) | \
>