On Sun, Sep 15, 2024 at 07:08:35PM +0100, Simon Horman wrote:

On Sat, Sep 14, 2024 at 09:56:24PM -0700, Shradha Gupta wrote:

quoted

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 <redacted>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>

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.

Noted, thanks Simon

-- 
pw-bot: defer