Re: i8259 and IO-APIC

Zwane Mwaikambo (zwane@linux.realnet.co.sz)
Mon, 27 May 2002 17:59:54 +0200 (SAST)


On 27 May 2002, Terje Eggestad wrote:

> Do you got any numbers that state that it's processing overhead, and not
> HW latency that is the bulk of interrupt service time? Just curious,
> I've been looking and can't find this "perceived fact" backed up by
> facts anywhere.

I think Alan had the ISR and kernel IRQ service overhead in mind. In this
light, hardware interrupt latency is a drop in the ocean..

Cheers,
Zwane Mwaikambo

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