Commit c3ade221 authored by Hui Tang's avatar Hui Tang
Browse files

sched: Add statistics for scheduler dynamic affinity 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LL9S



--------------------------------

Signed-off-by: default avatarHui Tang <tanghui20@huawei.com>
parent cc1db38f

include/linux/sched.h

+5 −0
Original line number Diff line number Diff line
@@ -543,6 +543,11 @@ struct sched_statistics { 
#ifdef CONFIG_SCHED_CORE

	u64				core_forceidle_sum;

#endif



#ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY

	u64				nr_wakeups_preferred_cpus;

	u64				nr_wakeups_force_preferred_cpus;

#endif

#endif /* CONFIG_SCHEDSTATS */

} ____cacheline_aligned;

kernel/sched/debug.c

+4 −0
Original line number Diff line number Diff line
@@ -1039,6 +1039,10 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, 
		P_SCHEDSTAT(nr_wakeups_affine_attempts);

		P_SCHEDSTAT(nr_wakeups_passive);

		P_SCHEDSTAT(nr_wakeups_idle);

#ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY

		P_SCHEDSTAT(nr_wakeups_preferred_cpus);

		P_SCHEDSTAT(nr_wakeups_force_preferred_cpus);

#endif



		avg_atom = p->se.sum_exec_runtime;

		if (nr_switches)

kernel/sched/fair.c

+9 −2
Original line number Diff line number Diff line
@@ -8186,6 +8186,8 @@ static void set_task_select_cpus(struct task_struct *p, int *idlest_cpu, 
		if (available_idle_cpu(cpu)) {

			rcu_read_unlock();

			p->select_cpus = p->prefer_cpus;

			if (sd_flag & SD_BALANCE_WAKE)

				schedstat_inc(p->stats.nr_wakeups_preferred_cpus);

			return;

		}
@@ -8195,8 +8197,11 @@ static void set_task_select_cpus(struct task_struct *p, int *idlest_cpu, 
	rcu_read_unlock();



	if (tg_capacity > cpumask_weight(p->prefer_cpus) &&

	    util_avg_sum * 100 <= tg_capacity * sysctl_sched_util_low_pct)

	    util_avg_sum * 100 <= tg_capacity * sysctl_sched_util_low_pct) {

		p->select_cpus = p->prefer_cpus;

		if (sd_flag & SD_BALANCE_WAKE)

			schedstat_inc(p->stats.nr_wakeups_preferred_cpus);

	}

}

#endif
@@ -8296,8 +8301,10 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags) 
	rcu_read_unlock();



#ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY

	if (!cpumask_test_cpu(new_cpu, p->select_cpus))

	if (!cpumask_test_cpu(new_cpu, p->select_cpus)) {

		new_cpu = idlest_cpu;

		schedstat_inc(p->stats.nr_wakeups_force_preferred_cpus);

	}

#endif

	return new_cpu;

}