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"APIC error on CPUx" - what does this mean?

DISCUSSION Petr Vandrovec 2 participants 2 messages Jan 7, 2002

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Quoted 14 lines · Chris Wedgwood

On Thu, Jan 03, 2002 at 10:38:27PM +0000, Alan Cox wrote:
The occasional APIC error is fine (its logging a hardware event - probably something that caused enough noise to lose a message and retry it). The APIC bus is designed to stand these occasional errors

I'm curious... is there any way to determine what is causing these? On a UP athlon I have:

cw:tty5@charon(cw)$ uname -r ; uptime && grep ERR /proc/interrupts
2.4.17-rc2
 02:09:50 up 4 days,  5:18, 10 users,  load average: 0.00, 0.00, 0.00
ERR:       5216
Quoted 4 lines

which equates several per minute at times... no funny hardware, not running X11, and I don't remembering seeing these a while ago on this same mainboard (but I never really looked either, so that might not be true).

They are spurious IRQ 7, just message is printed only once during kernel lifetime... I have about three spurious IRQ 7 per each 1000 interrupts delivered to CPU. It is on A7V (Via KT133).
Best regards,
Petr Vandrovec [email protected]

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On Mon, Jan 07, 2002 at 01:29:42PM +0100, Petr Vandrovec wrote:

They are spurious IRQ 7, just message is printed only once during kernel lifetime... I have about three spurious IRQ 7 per each 1000 interrupts delivered to CPU. It is on A7V (Via KT133).

Any idea _why_ these occur though? It seems some mainboards produce a plethora of these whilst others never produce these...

--cw