On Mon, Apr 10, 2017 at 11:18:29AM +0200, Vincent Guittot wrote:
> +++ b/include/linux/sched.h
> @@ -313,6 +313,7 @@ struct load_weight {
> */
> struct sched_avg {
> u64 last_update_time;
> + u64 stolen_idle_time;
> u64 load_sum;
> u32 util_sum;
> u32 period_contrib;
> + if (sa->util_sum < (LOAD_AVG_MAX * 1000)) {
> + /*
> + * Add the idle time stolen by running at lower compute
> + * capacity
> + */
> + delta += sa->stolen_idle_time;
> + }
> + sa->stolen_idle_time = 0;
So I was wondering if stolen_idle_time really needs to be a u64. Afaict
we'll be at LOAD_AVG_MAX after LOAD_AVG_MAX_N periods, or LOAD_AVG_MAX_N
* LOAD_AVG_PERIOD time, which ends up being 11040.
After that you'll truncate it anyway.. so there shouldn't be a need to
be much larger than that, no?
