On 2011-06-03, Eric K. Miller <emil...@thecreation.com> wrote: >> Are you running -current? There have been some massive tweaks in > networking performance in -current. Try out and report back. > > We were running 4.7 amd64 version (GENERIC.MP). Also tried the single > processor version. > > Intel Pro/1000 MT cards were used. > > I should mention that we had a large number of virtual interfaces (300+) > for routing traffic among these VLANs. So maybe this was the cause.
after 4.9 we switched to an RB tree for local address lookups, I think this is likely to help that situation. there is also a hash and sequentially-searched list used for vlan tag lookup; dlg looked at replacing it with an RB tree before, iirc it made things worse on some machines (probably those with microscopic caches) but it's probably worth re-checking that...
