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noapic or irqpoll

Submitted by Anonymous
on July 12, 2007 - 6:03am

All,

I have a tv-capture card that works great if I add the irqpoll option to the kernel.

Without the option, it always get
irq 21: nobody cared! and then a stack dump.

But the strange part is, it works also if I add the noapic option.

My system has a Pentium4 with hyperthreating and it shows 2 cpus.

Which option would give best performance: irqpoll or noapic? And could somebody explain why?

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If noapic works go with

Noth
on
July 13, 2007 - 3:47am

If noapic works go with that. irqpoll makes the kernel ask every interrupt handler if they want to handle the interrupt in question whenever one fires.

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