Re: [RFC patch 0/5] genirq: add infrastructure for threadedinterrupt handlers

[Arjan van de Ven]

On Fri, 3 Oct 2008 05:25:04 +0200
Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:

> > 
> > one of the things irq threads gives you is that 'top' will show you
> > which ones are eating cpu ;-)
> 
> oprofile does that job fine already and is imho any time preferable
> for detailed analysis.

while I don't disagree that oprofile will give you more detailed
results, I think there's a HUGE difference between asking a bugreporter
"can you paste a screen of 'top'" and "can you configure and run
oprofile".
CHances are good that the user already thought of top him/herself and
just reports "interrupt X is eating CPU" rather than "something seems
to be eating CPU".

I'm not going argue that this alone is enough justification for
irqthreads, but you can't deny it's an advantage.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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