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SubjectRe: SMP P4 APIC/interrupt balancing

On Wed, 17 Apr 2002, James Bourne wrote:

> After Ingo forwarded me his original patch (I found his patch via a web
> based medium, which had converted all of the left shifts to compares,
> and now I'm very glad it didn't boot...) and the system is booted and is
> balancing most of the interrupts at least. Here's the current output of
> /proc/interrupts
>
> brynhild:bash$ cat /proc/interrupts
> CPU0 CPU1
> 0: 171414 0 IO-APIC-edge timer
> 1: 3 2 IO-APIC-edge keyboard
> 2: 0 0 XT-PIC cascade
> 8: 1 0 IO-APIC-edge rtc
> 18: 8 7 IO-APIC-level aic7xxx
> 19: 13566 12799 IO-APIC-level eth0
> 20: 9 7 IO-APIC-level aic7xxx
> 21: 9 7 IO-APIC-level aic7xxx
> 27: 1572 5371 IO-APIC-level megaraid
> NMI: 0 0
> LOC: 171315 171251
> ERR: 0
> MIS: 0

it's looking good.

> So, the timer isn't being balanced still, others are (is there a
> specific case in your patch for irq 0 (< 1)? I couldn't see it but it
> almost looks as though it's being missed..)

it's a separate bug, solved by a separate patch.

Ingo

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