Rx performance

[Ivan Malov]

Hi Ed,

On Wed, 16 Jul 2025, Lombardo, Ed wrote:

> Hi,
> I have E810-C 2x100G NIC, the perf tool shows scalar rx path and not vectorized rx path.  When I turn off Rx Offload (NIC rx timestamp) I see vectorized rx path in perf tool.  
> 
> Why is this a drawback and is this with just the E810 NIC?

See the comment on line [1]. By the sound of it, this is somewhat expected.
[1] https://github.com/DPDK/dpdk/blob/fa3aca8a525decfd12bd5fa01ebc98789d5f7278/drivers/net/intel/common/rx.h#L104

Thank you.

> 
> is there a way around this so Rx Offload Rx Timestamp can be used in our application and get vectorized rx path?  
> 
> We need rx timestamps of packets and max performance.
> 
> Thanks,
> Ed
> 
>