Latency spikes on FreeBSD 8.2 with kernel scan function.

[Stuart Henderson]

On 2011/11/23 16:27, Ondrej Zajicek wrote:
> On BSD, kernel scan is implemented by requesting a big buffer and
> copying several tens of MB of route data from kernel to BIRD.
> I am not an expert on BSD, but perhaps there may be some kernel problem
> on some BSD version?

I don't know about FreeBSD but dumping the kernel route table can
certainly be quite expensive on OpenBSD. It doesn't take all that long
but locking means that interactive response can be quite poor while it
happens.