Re: CONFIG_IRQBALANCE for AMD64?

michael
2004-05-29T08:42:41Z

Arjan van de Ven <arjanv@redhat.com> writes:
> On Fri, May 28, 2004 at 11:33:32AM -0700, Martin J. Bligh wrote:
[...]
> > Also, we may well have more than 1 CPU's worth of traffic to
> > process in a large network server.
>
> One NIC? I've yet to see that ;)

Oh, and another corner case.

Say you have a cpu-bound process on an SMP box.
Say you're also using a large chunk of a CPU processing
interrupts from a single IRQ.

What stops the cpu-bound process being scheduled onto
the same CPU as the interrupt handlers?

Now you've got one idle CPU, and one seriously overloaded
CPU.

Michael.