On Tue, 2013-07-02 at 12:43 +0800, Michael Wang wrote:
> +static int nasty_pull(struct task_struct *p)
> +{
> + int factor = cpumask_weight(cpu_online_mask);
> +
> + /*
> + * Yeah, it's the switching-frequency, could means many wakee or
> + * rapidly switch, use factor here will just help to automatically
> + * adjust the loose-degree, so more cpu will lead to more pull.
> + */
> + if (p->nr_wakee_switch > factor) {
> + /*
> + * wakee is somewhat hot, it needs certain amount of cpu
> + * resource, so if waker is far more hot, prefer to leave
> + * it alone.
> + */
> + if (current->nr_wakee_switch > (factor * p->nr_wakee_switch))
> + return 1;
> + }
> +
> + return 0;
> +}
Ew. I haven't gotten around to test-driving this patchlet, and I see
you haven't gotten around to finding a better name either. Any other
name will likely have a better chance of flying.
tasks_related()
...
well, nearly any..
tasks_think_wake_affine_sucks_rocks()
..that won't fly either :)
-Mike
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