On 26-06-2009 19:45, Pawe. Staszewski wrote:

Eric Dumazet pisze:

...

quoted

Pawel made some reports errors in fib thread, so I am not sure he really
 tried 2.6.30 and had same oprofile results.

rt_worker_func() taking 13% of cpu0 is an alarm for me :)
And 21% of cpu0 and 34% of cpu6 taken by oprofiled seems odd too...

Pawel, could you give us :

grep . /proc/sys/net/ipv4/route/*
cat /proc/interrupts

on your various kernels (previous to 2.6.29, 2.6.29, 2.6.30, ...)

I suspect a change in hash table size, and/or change in interrupt affinities...

Btw., Pawel these eth0's don't look like affined or I miss something?

Jarek P.
...

cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3       CPU4       
CPU5       CPU6       CPU7

...

 29:    1139988   18351004      89662          3          0          
1          0          3   PCI-MSI-edge      eth0
 30:          0          2   20221692          1          0          
3          0          0   PCI-MSI-edge      eth1

...

second machine:
Linux TM_02_C1 2.6.30 #1 SMP Thu Jun 25 21:49:58 CEST 2009 i686 Intel(R) 
Xeon(R) CPU 3075 @ 2.66GHz GenuineIntel GNU/Linux

cat /proc/interrupts
           CPU0       CPU1

...

 28:      13482      11260   PCI-MSI-edge      eth2
 29:          3 1326457765   PCI-MSI-edge      eth1
 30: 1240943198  137973134   PCI-MSI-edge      eth0