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SubjectRe: how to balance interrupts between 2 CPUs?
>     The kernel's SMP option is enable, but the CPU1 is always idle.
> How to balance the interrpupts between two CPUs?
> If you are convenient, please give me some advice quickly.

The P4 apics do not automatically balance interrupts between CPUs.
You need to do it explicitly - there are several ways floating
around to do this - try the APIC routing patch on this website:

http://sourceforge.net/projects/lse

and let us know if this works ...

M.

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