Strange Freebsd Router Problem

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Dear All,

Now a days I getting a Problem with my 4.11 FreeBSD Router with 3 Gigabits
(bge) Broadcom Ethernet Cards, It was working fine and uses to pass more
then 200 Mbits/s Internet Traffic but now a day not passing more then
90Mbits/s. Even All cards are have Giga Connectivity.

I am using ipfw + dummynet for bandwidth Shaping.

Now what I got using TOP command is very high *81.3% interrupt.*

17 processes:  1 running, 16 sleeping
*CPU states:  0.0% user,  0.0% nice,  0.0% system, 81.3% interrupt, 18.8%
idle*
Mem: 6016K Active, 6944K Inact, 48M Wired, 32K Cache, 5888K Buf, 1939M Free
Swap: 240M Total, 240M Free

  PID USERNAME PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND
  932 root      28   0  1916K  1212K RUN      0:00  1.61%  0.29% top
  847 root       2   0  5740K  4432K select   0:02  0.00%  0.00% snmpd
  877 root       2   0  5300K  2292K select   0:01  0.00%  0.00% sshd
  880 root      18   0  1328K   980K pause    0:00  0.00%  0.00% csh
  824 root       2   0  2600K  1948K select   0:00  0.00%  0.00% sshd
  813 root       2   0   992K   728K select   0:00  0.00%  0.00% syslogd
  870 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  822 root      10   0  1036K   800K nanslp   0:00  0.00%  0.00% cron
  872 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  871 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  869 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  873 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  866 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  867 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  868 root       3   0   960K   608K ttyin    0:00  0.00%  0.00% getty
  820 root       2   0  1052K   644K select   0:00  0.00%  0.00% inetd
   29 root      18   0   212K    96K pause    0:00  0.00%  0.00% adjkerntz

######### netstat -m show every thing good.

alpha4# netstat -m
2736/3872/262000 mbufs in use (current/peak/max):
        2736 mbufs allocated to data
2734/3862/65500 mbuf clusters in use (current/peak/max)
8692 Kbytes allocated to network (4% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

### vmstat -z Shows evey thing is good

ITEM            SIZE     LIMIT    USED    FREE  REQUESTS

PIPE:            160,        0,     10,     92,      130
SWAPMETA:        160,   233016,      0,      0,        0
unpcb:           160,        0,      1,     49,       21
ripcb:           192,    65500,      0,     42,      685
divcb:           192,    65500,      0,      0,        0
syncache:        160,    15359,      0,     25,        1
tcpcb:           576,    65500,      4,     10,        4
udpcb:           192,    65500,      3,     39,       30
socket:          224,    65500,      8,     28,      773
KNOTE:            64,        0,      0,    128,        3
DIRHASH:        1024,        0,     30,      6,       30
NFSNODE:         352,        0,      0,      0,        0
NFSMOUNT:        544,        0,      0,      0,        0
VNODE:           192,        0,   1128,     38,     1128
NAMEI:          1024,        0,      0,     16,    14184
VMSPACE:         192,        0,     18,     46,      926
PROC:            416,        0,     29,     20,      942
DP fakepg:        64,        0,      0,      0,        0
PV ENTRY:         28,  2276416,  11662, 510146,   200115
MAP ENTRY:        48,        0,    381,    172,    29674
KMAP ENTRY:       48,    57551,     87,    126,     3393
MAP:             108,        0,      7,      3,        7
VM OBJECT:        92,        0,    551,    101,    13873


Please advice me what to do or how to decrease this *81.3% interrupt.

Thanks in advance.

TheOne KHan

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