[FUG-BR] processamento interrupt muito alto

[willian em radartelecom.com.br]

Salve amigos tenho um servidor BSD ainda na versao 4.11 funciona pra fazer
nat pra um clientes de acesso wireless e de ums dias pra ca notei que ele
comecou a ficar muito lento verifiquei via top que as interrupcoes estava
altas esta consumindo 63.6 do processamento oque devo fazer pra baixar
isso so lembrando que estou usando placas de rede realtek

last pid: 13987;  load averages:  0.15,  0.07,  0.08                      
                                 up 2+04:50:49  15:20:39
18 processes:  3 running, 15 sleeping
CPU states: 4.5% user, 0.0% nice,  0.0% system, 63.6% interrupt, 31.8% idle
Mem: 8328K Active, 35M Inact, 48M Wired, 60M Buf, 406M Free
Swap: 128M Total, 128M Free

PID USERNAME PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND
  285 root      28   0  3680K  3472K RUN    273.0H  1.07%  1.07% natd
  320 root      10   0  1036K   772K nanslp  46:24  0.00%  0.00% cron
  311 root       2   0   992K   688K select  34:58  0.00%  0.00% syslogd
  322 root       2   0  2600K  1996K select   0:17  0.00%  0.00% sshd
13946 toor      28   0  5300K  2328K RUN      0:01  0.00%  0.00% sshd
13948 root      18   0  1388K  1036K pause    0:00  0.00%  0.00% csh
13944 root       2   0  5300K  2248K sbwait   0:00  0.00%  0.00% sshd
13987 root      28   0  1912K  1212K RUN      0:00  0.00%  0.00% top
13947 toor      10   0   632K   432K wait     0:00  0.00%  0.00% sh
  318 root       2   0  1052K   692K select   0:00  0.00%  0.00% inetd
  340 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  346 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  344 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  347 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  345 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  341 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty
  342 root       3   0   960K   696K ttyin    0:00  0.00%  0.00% getty