RELENG_7_1: bce driver change generating too much interrupts ?

[Mike Jakubik]

On Tue, December 2, 2008 4:57 am, Geoffroy Desvernay wrote:
> Since last upgrade, I see much more CPU time "eated" by interrupts (at
> least 10% cpu in top)
> (see http://dgeo.perso.ec-marseille.fr/cpu-week.png)

I am also seeing the same behavior on a farm of Dell servers.

root at web.local:~# vmstat -i
interrupt                          total       rate
irq1: atkbd0                          18          0
irq14: ata0                          176          0
irq16: mfi0                        67924          1
irq20: uhci1 uhci3                     1          0
irq21: uhci0 uhci+                     5          0
cpu0: timer                    132244117       1997
irq257: bce1                  3366039632      50853
cpu1: timer                    132244053       1997
cpu2: timer                    132244053       1997
cpu3: timer                    132244053       1997
Total                         3895084032      58846

Not only this, but i have also noticed that there are a number of errors
reported by netstat now. before the drivers update, i would not get these
errors.

root at web.local:~# netstat -i
Name    Mtu Network       Address              Ipkts Ierrs    Opkts Oerrs 
Coll
   0
bce1   1500 <Link#2>      00:1e:c9:b5:cc:b6  1848959  2197  1357031     0 
   0