Re: [PATCH net-next RESEND] net: mana: Increase the DEF_RX_BUFFERS_PER_QUEUE to 1024
From: Pavan Chebbi
Date: Mon Sep 30 2024 - 04:17:06 EST
On Mon, Sep 30, 2024 at 9:14 AM Shradha Gupta
<shradhagupta@xxxxxxxxxxxxxxxxxxx> wrote:
>
> Through some experiments, we found out that increasing the default
> RX buffers count from 512 to 1024, gives slightly better throughput
> and significantly reduces the no_wqe_rx errs on the receiver side.
> Along with these, other parameters like cpu usage, retrans seg etc
> also show some improvement with 1024 value.
>
> Following are some snippets from the experiments
>
> ntttcp tests with 512 Rx buffers
> ---------------------------------------
> connections| throughput| no_wqe errs|
> ---------------------------------------
> 1 | 40.93Gbps | 123,211 |
> 16 | 180.15Gbps | 190,120 |
> 128 | 180.20Gbps | 173,508 |
> 256 | 180.27Gbps | 189,884 |
>
> ntttcp tests with 1024 Rx buffers
> ---------------------------------------
> connections| throughput| no_wqe errs|
> ---------------------------------------
> 1 | 44.22Gbps | 19,864 |
> 16 | 180.19Gbps | 4,430 |
> 128 | 180.21Gbps | 2,560 |
> 256 | 180.29Gbps | 1,529 |
>
> So, increasing the default RX buffers per queue count to 1024
>
> Signed-off-by: Shradha Gupta <shradhagupta@xxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> ---
> include/net/mana/mana.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
Looks good to me.
Reviewed-by: Pavan Chebbi <pavan.chebbi@xxxxxxxxxxxx>
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