Re: userspace irq balancer

Andrea Arcangeli
2003-05-26T23:21:38Z

On Mon, May 26, 2003 at 04:26:16PM -0700, Andrew Morton wrote:
> Andrea Arcangeli <andrea@suse.de> wrote:
> >
> > if (IRQ_ALLOWED(phys_id, allowed_mask) && idle_cpu(phys_id))
> > return cpu;
>
> How hard would it be to make this HT-aware?
>
> idle_cpu(phys_id) && idle_cpu_siblings(phys_id)
>
> or whatever.

yeah! that was the obvious next step. as fast path the additional && is
sure good. Maybe that's enough after all, and we might search only for
fully idle cpus, however I wouldn't dislike to search for a fallback
(partially) logical idle cpu if none physical cpu is (fully) idle.

Andrea