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Commit 7b211a4e authored by Joonwoo Park's avatar Joonwoo Park
Browse files

sched: EAS: introduce irqload awareness 



Avoid task placement on CPUs which are highly loaded with lots
of IRQ handling.

Change-Id: I55908f211aeb5338d10fb81db1ef33116b8fe98b
Signed-off-by: default avatarJoonwoo Park <joonwoop@codeaurora.org>
parent dc3420d8

include/trace/events/sched.h

+6 −2
Original line number Diff line number Diff line
@@ -715,6 +715,8 @@ TRACE_EVENT(sched_cpu_util, 
		__field(unsigned long, curr_util		)

		__field(int, sync				)

		__field(int, idle_state				)

		__field(unsigned int, irqload		)

		__field(int, high_irqload		)

	),



	TP_fast_assign(
@@ -729,10 +731,12 @@ TRACE_EVENT(sched_cpu_util, 
		__entry->curr_util		= curr_util;

		__entry->sync			= sync;

		__entry->idle_state		= idle_get_state_idx(cpu_rq(cpu));

		__entry->irqload		= sched_irqload(cpu);

		__entry->high_irqload		= sched_cpu_high_irqload(cpu);

	),



	TP_printk("comm=%s pid=%d cpu=%d task_util=%d nr_running=%d cpu_util=%ld capacity_curr=%u capacity=%u curr_util=%ld sync=%d idle_state=%d",

		__entry->comm, __entry->pid, __entry->cpu, __entry->task_util, __entry->nr_running, __entry->cpu_util, __entry->capacity_curr, __entry->capacity, __entry->curr_util, __entry->sync, __entry->idle_state)

	TP_printk("comm=%s pid=%d cpu=%d task_util=%d nr_running=%d cpu_util=%ld capacity_curr=%u capacity=%u curr_util=%ld sync=%d idle_state=%d irqload=%u high_irqload=%u",

		__entry->comm, __entry->pid, __entry->cpu, __entry->task_util, __entry->nr_running, __entry->cpu_util, __entry->capacity_curr, __entry->capacity, __entry->curr_util, __entry->sync, __entry->idle_state, __entry->irqload, __entry->high_irqload)

);



DECLARE_EVENT_CLASS(sched_task_util,

kernel/sched/fair.c

+3 −0
Original line number Diff line number Diff line
@@ -6655,6 +6655,9 @@ static int energy_aware_wake_cpu(struct task_struct *p, int target, int sync) 
			trace_sched_cpu_util(p, i, task_util_boosted,

					     curr_util, sync);



			if (sched_cpu_high_irqload(cpu))

				continue;



			/*

			 * Ensure minimum capacity to grant the required boost.

			 * The target CPU can be already at a capacity level higher

kernel/sched/rt.c

+3 −0
Original line number Diff line number Diff line
@@ -1885,6 +1885,9 @@ static int find_lowest_rq(struct task_struct *task) 
			 */

			util = cpu_util(cpu);

			if (!cpu_overutilized(cpu)) {

				if (sched_cpu_high_irqload(cpu))

					continue;



				if (best_cpu_util > util ||

				    (best_cpu_util == util &&

				     cpu == task_cpu(task))) {