Syncookies under stress in FreeBSD, issues?

[Alex Flex]

Hello,

While I understand that this question is not directly related to pf, iam 
sure the users concerned with security and firewalls use syn cookies. 
Iam currently a linux user looking to switch to FreeBSD due to the fact 
we are recieving large amounts of syn floods and linux behaves rather 
odd, specifically ive noticed that when syn cookies is enabled under 
linux it tends to use only one core to process those and thus does not 
evenly distribute the load which concerns me.

Iam wondering if anybody has load tested FreeBSD syn cookies, and if I 
can be given references to the amount of pps it has been able to handle 
(under random sources) ... or if there is some specific tuning advised.

Any orietnation is appreciated. Thanks/

Alex