OpenBSD 5.7, high idle interrupts with stable amd64

[roggy]

Running stable OpenBSD 5.7 amd64 and in the top I see high interrupt CPU utilization despite machine being idle.
This happens when the network is in peak use. And then my network is slow.
The top command returns the following:

load averages: 0.16, 0.11, 0.09
31 processes: 30 idle, 1 on processor
CPU0 states: 0.0% user, 0.0% nice, 0.0% system, 15.8% interrupt, 84.2% idle
CPU1 states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
CPU2 states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
CPU3 states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle
Memory: Real: 21M/166M act/tot Free: 3799M Cache: 83M Swap: 0K/2047M

The "systat vmstat" command returns the following:

2 users Load 0.09 0.09 0.08 Wed Sep 16 18:19:36 2015

memory totals (in KB) PAGING SWAPPING Interrupts
real virtual free in out in out 5041 total
Active 21764 21764 3889596 ops 400 clock
All 171164 171164 5986076 pages 7 ipi
2021 em0
Proc:r d s w Csw Trp Sys Int Sof Flt forks 3790 em1
5 14 30 4089 6468 11 fkppw uhci0
fksvm ehci0
2.8%Int 0.0%Sys 0.0%Usr 0.0%Nic 97.2%Idle pwait pciide0
| | | | | | | | | | | relck
| rlkok
noram
Namei Sys-cache Proc-cache No-cache ndcpy
Calls hits % hits % miss % fltcp
zfod
cow
Disks wd0 33839 fmin
seeks 45118 ftarg
xfers itarg
speed 6K 1058 wired
sec 0.0 pdfre
pdscn
pzidle
24 kmapent

I've no idea what kernel parameters should be changed.
Has anyone ever experienced this?

[Oko]

Could you please post your dmesg? When you said stable. How did you get there, applying patches or compiling from the source? Have you played with kernel conf before compiling?

[roggy]

Hi Oko,

I keep stable through the M:tier.
Follows my dmesg

arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.1.9 on vlan2 by ac:7b:a1:c7:eb:ec on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
arp: attempt to overwrite entry for 192.168.1.9 on vlan2 by ac:7b:a1:c7:eb:ec on vlan172
arp: attempt to overwrite entry for 192.168.10.18 on vlan5 by c0:65:99:07:18:d5 on vlan172
syncing disks... done
r
OpenBSD 5.7 (GENERIC.MP) #2: Mon Jul 27 16:16:48 CEST 2015
root@stable-57-amd64.mtier.org:/binp...ile/GENERIC.MP
real mem = 4267245568 (4069MB)
avail mem = 4149731328 (3957MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xfc480 (23 entries)
bios0: vendor American Megatrends Inc. version "080016" date 01/16/2013
acpi0 at bios0: rev 0
acpi0: sleep states S0 S1 S4 S5
acpi0: tables DSDT FACP APIC MCFG OEMB HPET GSCI
acpi0: wakeup devices P0P1(S4) PS2K(S4) PS2M(S4) USB0(S4) USB1(S4) USB2(S4) USB3(S4) EUSB(S4) P0P4(S4) P0P5(S4) P0P6(S4) P0P7(S4) P0P8(S4) P0P9(S4) HDAC(S4) USB4(S4) [.
..]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Atom(TM) CPU D525 @ 1.80GHz, 1800.24 MHz
cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE, SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3,CX16,xTP
R,PDCM,MOVBE,NXE,LONG,LAHF,PERF
cpu0: 512KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 7 var ranges, 88 fixed ranges
cpu0: apic clock running at 200MHz
cpu0: mwait min=64, max=64, C-substates=0.1.0.0.0, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Atom(TM) CPU D525 @ 1.80GHz, 1800.00 MHz
cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE, SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3,CX16,xTP
R,PDCM,MOVBE,NXE,LONG,LAHF,PERF
cpu1: 512KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 1 (application processor)
cpu2: Intel(R) Atom(TM) CPU D525 @ 1.80GHz, 1800.02 MHz
cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE, SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3,CX16,xTP
R,PDCM,MOVBE,NXE,LONG,LAHF,PERF
cpu2: 512KB 64b/line 8-way L2 cache
cpu2: smt 1, core 0, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Atom(TM) CPU D525 @ 1.80GHz, 1800.00 MHz
cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE, SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3,CX16,xTP
R,PDCM,MOVBE,NXE,LONG,LAHF,PERF
cpu3: 512KB 64b/line 8-way L2 cache
cpu3: smt 1, core 1, package 0
ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 1, remapped to apid 4
acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 7 (P0P1)
acpiprt2 at acpi0: bus 1 (P0P4)
acpiprt3 at acpi0: bus 2 (P0P5)
acpiprt4 at acpi0: bus 3 (P0P6)
acpiprt5 at acpi0: bus 4 (P0P7)
acpiprt6 at acpi0: bus 5 (P0P8)
acpiprt7 at acpi0: bus 6 (P0P9)
acpicpu0 at acpi0
acpicpu1 at acpi0
acpicpu2 at acpi0
acpicpu3 at acpi0
acpibtn0 at acpi0: PWRB
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Pineview DMI" rev 0x02
vga1 at pci0 dev 2 function 0 "Intel Pineview Video" rev 0x02
intagp0 at vga1
agp0 at intagp0: aperture at 0xd0000000, size 0x10000000
inteldrm0 at vga1
drm0 at inteldrm0
inteldrm0: 1024x768
wsdisplay0 at vga1 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
"Intel Pineview Video" rev 0x02 at pci0 dev 2 function 1 not configured
ppb0 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev 0x04: msi
pci1 at ppb0 bus 1
em0 at pci1 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:48:9f:49
ppb1 at pci0 dev 28 function 1 "Intel 82801H PCIE" rev 0x04: msi
pci2 at ppb1 bus 2
em1 at pci2 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:9b:20:54
ppb2 at pci0 dev 28 function 2 "Intel 82801H PCIE" rev 0x04: msi
pci3 at ppb2 bus 3
em2 at pci3 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:bd:90:d2
ppb3 at pci0 dev 28 function 3 "Intel 82801H PCIE" rev 0x04: msi
pci4 at ppb3 bus 4
em3 at pci4 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:79:0b:15
ppb4 at pci0 dev 28 function 4 "Intel 82801H PCIE" rev 0x04: msi
pci5 at ppb4 bus 5
em4 at pci5 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:70:4c:04
ppb5 at pci0 dev 28 function 5 "Intel 82801H PCIE" rev 0x04: msi
pci6 at ppb5 bus 6
em5 at pci6 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 84:44:64:b2:3a:3b
uhci0 at pci0 dev 29 function 0 "Intel 82801H USB" rev 0x04: apic 4 int 23
uhci1 at pci0 dev 29 function 1 "Intel 82801H USB" rev 0x04: apic 4 int 19
uhci2 at pci0 dev 29 function 2 "Intel 82801H USB" rev 0x04: apic 4 int 18
ehci0 at pci0 dev 29 function 7 "Intel 82801H USB" rev 0x04: apic 4 int 23
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb6 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xf4
pci7 at ppb6 bus 7
pcib0 at pci0 dev 31 function 0 "Intel 82801HBM LPC" rev 0x04
pciide0 at pci0 dev 31 function 1 "Intel 82801HBM IDE" rev 0x04: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <TS8GCF170>
wd0: 1-sector PIO, LBA48, 7647MB, 15662304 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
pciide0: channel 1 ignored (disabled)
pciide1 at pci0 dev 31 function 2 "Intel 82801HBM SATA" rev 0x04: DMA, channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide1: using apic 4 int 18 for native-PCI interrupt
ichiic0 at pci0 dev 31 function 3 "Intel 82801H SMBus" rev 0x04: apic 4 int 17
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-10600 SO-DIMM
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
wbsio0 at isa0 port 0x2e/2: W83627DHG-P rev 0x73
lm1 at wbsio0 port 0xa10/8: W83627DHG
uhidev0 at uhub1 port 1 configuration 1 interface 0 "Dell Dell USB Entry Keyboard" rev 1.10/1.78 addr 2
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
vscsi0 at root
scsibus1 at vscsi0: 256 targets
softraid0 at root
scsibus2 at softraid0: 256 targets
root on wd0a (11d29165871b6672.a) swap on wd0b dump on wd0b
arp info overwritten for 172.16.0.249 by 14:fe:b5:a8:6b:f7 on vlan172

[jggimi]

You have a lot of ARP issues on vlan172. This points to either a misconfigured network, or devices conducting penetration testing of network protocol stacks. Do you have devices on that network running network security analysis, such as with Ettercap?

From Wikipedia:

Ettercap works by putting the network interface into promiscuous mode and by ARP poisoning the target machines. Thereby it can act as a 'man in the middle' and unleash various attacks on the victims.

It's likely whatever is going on on that network is driving the high interrupt rate. Fix the ARP issues, and see if interrupts return to normal levels.

[roggy]

Neither ethercap this finding that mac address.
Looking at http://www.coffer.com/mac_find, to know that the manufacturer is Samsung.
As I have wifi network, it must surely be a mobile phone or tablet.
Although I will investigate further with wireshark. I was in my unmanageable switches and not meeting this mac. Sinister ...
About the slowness in peak schedule, reading some more, I looked on network tuning in openbsd.
The https://calomel.org/network_performance.html site talks about it.
Follow the topic OpenBSD v5.1 and later network stack "speed_tweaks" and performance improved 90%.
With this, my interrupt rates fell slightly.
I think we lacked that tuning to improve.
Any others use some parameter to increase this performance?

[roggy]

jggimi,

my network this way: I have a network card on the router and another where my VLANs.
In /etc/rc.local I have some entries using dhcrelay, like this:
dhcrelay -i vlan6 192.168.100.200
dhcrelay -i vlan7 192.168.100.200
dhcrelay -i vlan9 192.168.100.200
dhcrelay -i vlan172 192.168.100.200

192.168.100.200 is my DHCP server, which also has the above-configured VLANs.
Do you see any wrong setting there?

---------------------------

Returning to dmesg, he now complains as follows:
arp: attempt to overwrite permanent entry is 192.168.1.1 by 98:fc:11:cf:69:63 on vlan6
I do not understand why it. The Mac address 98:fc:11:cf:69:63 is a Linksys 160n (domestic router).
Do you know if the 5.7 version of openbsd have any restrictions with mac address?

[jggimi]

I do not understand why you are using dhcrelay(8). The only reason to do so is to if your DHCPd server was on an untagged Ethernet. In my case, I do not use dhcrelay. My pair of dhcpd(8) servers are on tagged Ethernet. VLAN 5 is used by the servers for synchronization, while the subnets on VLANs 2 and 4 are bound to the dhcpd(8) daemon:

$ grep dhcp /etc/rc.conf.local
dhcpd_flags="-Y 10.0.5.2 -y vlan5 vlan2 vlan4"

You still have ARP problems. As I mentioned in my first reply, this is either due to misbehaving client systems or a misconfigured network. As this is a different VLAN and a different device, I'm going to guess you have a misconfigured network.

[roggy]

Jggimi,

I did not know that the dhcrelay was for this purpose.
As in their environment, I have my DHCP server on a tagged network.
Removed the entries dhcrelay -i entries workstations caught IP normally.
I will analyze. That may be the problem of both arp.