Commit e287d8eb authored by tanghui's avatar tanghui Committed by Zhong Jinghua
Browse files

sched: Add statistics for scheduler dynamic affinity 

hulk inclusion
category: feature
bugzilla: 186575, https://gitee.com/openeuler/kernel/issues/I526XC



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

Signed-off-by: default avatartanghui <tanghui20@huawei.com>
Signed-off-by: default avatarZheng Zucheng <zhengzucheng@huawei.com>
Reviewed-by: default avatarZhang Qiao <zhangqiao22@huawei.com>
parent bcddff7e

include/linux/sched.h

+6 −0
Original line number Diff line number Diff line
@@ -468,9 +468,15 @@ struct sched_statistics { 
	KABI_RESERVE(1)

	KABI_RESERVE(2)

#endif



#if defined(CONFIG_QOS_SCHED_DYNAMIC_AFFINITY) && !defined(__GENKSYMS__)

	u64				nr_wakeups_preferred_cpus;

	u64				nr_wakeups_force_preferred_cpus;

#else

	KABI_RESERVE(3)

	KABI_RESERVE(4)

#endif

#endif

};



struct sched_entity {

kernel/sched/debug.c

+4 −0
Original line number Diff line number Diff line
@@ -977,6 +977,10 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, 
		P_SCHEDSTAT(se.statistics.nr_qos_smt_expelled);

#endif



#ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY

		P_SCHEDSTAT(se.statistics.nr_wakeups_preferred_cpus);

		P_SCHEDSTAT(se.statistics.nr_wakeups_force_preferred_cpus);

#endif

		avg_atom = p->se.sum_exec_runtime;

		if (nr_switches)

			avg_atom = div64_ul(avg_atom, nr_switches);

kernel/sched/fair.c

+9 −2
Original line number Diff line number Diff line
@@ -7009,6 +7009,8 @@ 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->se.statistics.nr_wakeups_preferred_cpus);

			return;

		}
@@ -7018,8 +7020,11 @@ 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->se.statistics.nr_wakeups_preferred_cpus);

	}

}

#endif
@@ -7160,8 +7165,10 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f 
	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->se.statistics.nr_wakeups_force_preferred_cpus);

	}

#endif



	schedstat_end_time(cpu_rq(cpu), time);