Subject: Re: [PATCH net-next] net: mana: Increase the DEF_RX_BUFFERS_PER_QUEUE to 1024

From: Simon Horman <[email-masked]>
Date: Sun, 15 Sep 2024 19:08:35 +0100

On Sat, Sep 14, 2024 at 09:56:24PM -0700, Shradha Gupta 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 <[email-masked]>
> Reviewed-by: Haiyang Zhang <[email-masked]>

Hi Shradha,

net-next is currently closed other than for bug fixes.
Please consider reposting once it re-opens, after v6.12-rc1
has been released.

-- 
pw-bot: defer