Re: What is interrupting at ioapic0 pin 9?

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Thu, Dec 06, 2012 at 05:54:54PM +0200, Jukka Ruohonen wrote:
> On Thu, Dec 06, 2012 at 04:50:32PM +0100, Joerg Sonnenberger wrote:
> > On Thu, Dec 06, 2012 at 07:20:56AM -0800, Paul Goyette wrote:
> > > Under heavy load (such as, build.sh -j16) my system shows a lot of
> > > "system" time (30-50%, sometimes even more).  systat shows that I'm
> > > getting ~140K interrupts per second on ioapic0 pin 9.
> > 
> > ACPI is quite possible, especially if your CPU is getting hot.
> 
> But 140K per second (!) would be a huge amount for this. But who knows.
> If that is the case, there is nothing we can really do about it.

Well, some systems try to throttle the CPU or the like and we might be
ignoring something, so it continues to try.

Joerg