CPU affinity

[microlinux]

I have two routers, one running VyOS and one Vyatta.

The VyOS router (2 active interfaces) has an affinity for Cpu0 and Cpu2, while the Vyatta router (4 active interfaces) does not.

Any thoughts as to why this might be?

Pretty similar hardware, the VyOS router is an E3v2 and the Vyatta is an E3v1. Both Supermicro motherboards, the Vyatta router also has an Intel 4 port Ethernet card.

VyOS 1.0.2 (hydrogen)

top - 22:19:14 up 224 days, 22:21, 4 users, load average: 0.54, 0.55, 0.61
Tasks: 111 total, 2 running, 107 sleeping, 0 stopped, 2 zombie
Cpu0 : 23.4%us, 1.7%sy, 0.0%ni, 59.8%id, 0.0%wa, 0.0%hi, 15.1%si, 0.0%st
Cpu1 : 7.9%us, 0.7%sy, 0.0%ni, 91.1%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
Cpu2 : 0.7%us, 0.0%sy, 0.0%ni, 92.0%id, 0.0%wa, 0.0%hi, 7.3%si, 0.0%st
Cpu3 : 1.3%us, 0.0%sy, 0.0%ni, 98.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4026648k total, 1442896k used, 2583752k free, 163592k buffers
Swap: 0k total, 0k used, 0k free, 291968k cached

Vyatta Core 6.3 2011.07.21

top - 22:18:00 up 255 days, 10:53, 6 users, load average: 0.00, 0.01, 0.05
Tasks: 114 total, 3 running, 108 sleeping, 0 stopped, 3 zombie
Cpu0 : 4.3%us, 1.0%sy, 0.0%ni, 84.3%id, 0.0%wa, 0.0%hi, 10.3%si, 0.0%st
Cpu1 : 3.3%us, 0.7%sy, 0.0%ni, 83.3%id, 0.0%wa, 0.0%hi, 12.7%si, 0.0%st
Cpu2 : 1.0%us, 0.3%sy, 0.0%ni, 89.7%id, 0.0%wa, 0.0%hi, 9.0%si, 0.0%st
Cpu3 : 2.0%us, 0.3%sy, 0.0%ni, 82.7%id, 0.0%wa, 0.0%hi, 15.0%si, 0.0%st
Cpu4 : 4.0%us, 1.0%sy, 0.0%ni, 86.3%id, 0.0%wa, 0.0%hi, 8.7%si, 0.0%st
Cpu5 : 2.3%us, 1.0%sy, 0.0%ni, 84.0%id, 0.0%wa, 0.0%hi, 12.7%si, 0.0%st
Cpu6 : 2.3%us, 1.3%sy, 0.0%ni, 85.0%id, 0.0%wa, 0.0%hi, 11.3%si, 0.0%st
Cpu7 : 4.0%us, 1.7%sy, 0.0%ni, 78.7%id, 0.0%wa, 0.0%hi, 15.7%si, 0.0%st
Mem: 3106508k total, 1182424k used, 1924084k free, 185592k buffers
Swap: 0k total, 0k used, 0k free, 232736k cached