cpu affinity not work in FreeBSD 10-STABLE

Hi All,

Recently noticed the following:

# devinfo -rv

             em0 pnpinfo vendor=0x8086 device=0x105e subvendor=0x8086 
subdevice=0x135e class=0x020000 at slot=0 function=0
                 Interrupt request lines:
                     264
                 pcib1 I/O port window:
                     0x4020-0x403f
                 pcib1 memory window:
                     0xc1240000-0xc125ffff
                     0xc1260000-0xc127ffff

After discovering the irq264 in interface em0, I did this:

# cpuset -l 3 -x 264

Even doing this, the em0 continues migrating to other CPUafter a short 
period of time.

You see it happenwith top -PSH.

Tested on more than one system with FreeBSD 10-STABLE.

FreeBSD xxxx.xxxxx.xxx.xx 10.0-STABLE FreeBSD 10.0-STABLE #9 r267034: 
Wed Jun  4 02:22:38 BRT 2014 
[e-mail]:/usr/obj/usr/src/sys/GONDIM  amd64

Cheers,
Gondim

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