Re: How multithreaded is networking in FreeBSD 15.1?

On 8/17/26 23:28, Андрей Герасимов wrote:
> For a high-load router, you need to consider the network card.
> 
> For 1G-10G, Intel performs well, while Mellanox performs well for 40G and
> higher. The main thing is that the network card supports RSS (distributing
> interrupts from the network card across processor cores) and the FreeBSD
> driver is able to handle it.
> 
> Next, select a processor. The higher the clock speed of each core, the
> better. Hyperthreading should be disabled. For example, the Intel 82599EB
> has 2 ports, each port using 8 interrupts. For maximum performance, you
> need to dedicate 8 processor cores to each network card port. To maximize
> the use of both ports, you need a processor with 18 cores (Xeon Gold 6150).
> Reserve 1-2 cores for the OS itself, IPFW, NAT, etc. If only one network
> card port will be used, 10 cores are fine. You can use a dual-processor
> server with simpler processors, but it's more difficult to distribute
> interrupts across the processor cores, and performance will be slightly
> worse than with a single processor.
> 
> Choose memory based on the processor's requirements and the required
> capacity.
> 
> Properly configured IPfw and NAT work under heavy loads without problems.
> LACP also offers no performance issues, as long as you use an even number
> of ports. Three ports will work, but not at full capacity.


Thank you for the information.  :-)


The OP has provided little information about their project, so it is 
difficult to make recommendations.


David