And isn't it true that the speed of a single core is very important for routing daemons (control plane), but less so for packet forwarding (data plane), which can be parallelized between cores, especially in Linux?
As far as I understand it, BIRD 3 implements multithreading by allowing different protocol instances or routing tables to run on separate worker threads, but each individual bgp protocol instance itself still operates mostly in a single-threaded manner. Right?
Hello,
On Sat 01 Nov 2025 21:48:22 GMT, Mike Neo wrote:
> Hi,
>
> What's more important for a bird, the clock speed of a single processor
> core or the number of physical cores?
> For example, which is the better choice:
> 8x2.2 GHz or 4x3.8 GHz
>
> Kind regards,
> Mike
I always prefer the performance per core. Even if bird3 is
multi-threaded, you’ll always have some locks between the threads (eg.
compute and actual next-hop from BGP using OSPF).
And on pure routing, the higher the frequency is, the fastest the packet
is routed.
--
Alarig