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Chapter 4. Tuning the operating system 137
Draft Document for Review May 4, 2007 11:35 am 4285ch04.fm
After obtaining the interrupt number, you can use the smp_affinity parameter found in
/proc/irq/%{irq number} to tie an interrupt to a CPU. Example 4-25 illustrates this for the
above output of interrupt 169 of eth1 being bound to the second processor in the system.
Example 4-25 Setting the CPU affinity of an interrupt
[root@linux ~]# echo 02 > /proc/irq/169/smp_affinity