Commit 8219143b authored by Guan Jing's avatar Guan Jing Committed by Xia Fukun
Browse files

sched: Add statistics for qos smt expeller 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8O3MY


CVE: NA

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

We have added two statistics for qos smt expeller:
a) nr_qos_smt_send_ipi:the times of ipi which
online task expel offline tasks;
b) nr_qos_smt_expelled:the statistics that offline
task will not be picked times.

Signed-off-by: default avatarGuan Jing <guanjing6@huawei.com>
Signed-off-by: default avatarXia Fukun <xiafukun@huawei.com>
parent ceea34dd

include/linux/sched.h

+5 −0
Original line number Diff line number Diff line
@@ -548,6 +548,11 @@ struct sched_statistics { 
	u64				nr_wakeups_preferred_cpus;

	u64				nr_wakeups_force_preferred_cpus;

#endif



#ifdef CONFIG_QOS_SCHED_SMT_EXPELLER

	u64				nr_qos_smt_send_ipi;

	u64				nr_qos_smt_expelled;

#endif

#endif /* CONFIG_SCHEDSTATS */

} ____cacheline_aligned;

kernel/sched/debug.c

+5 −0
Original line number Diff line number Diff line
@@ -1046,6 +1046,11 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns, 
		}

#endif



#ifdef CONFIG_QOS_SCHED_SMT_EXPELLER

		P_SCHEDSTAT(nr_qos_smt_send_ipi);

		P_SCHEDSTAT(nr_qos_smt_expelled);

#endif



		avg_atom = p->se.sum_exec_runtime;

		if (nr_switches)

			avg_atom = div64_ul(avg_atom, nr_switches);

kernel/sched/fair.c

+2 −0
Original line number Diff line number Diff line
@@ -8971,6 +8971,7 @@ static void qos_smt_send_ipi(int this_cpu) 
		    rq->cfs.h_nr_running == 0)

			continue;



		schedstat_inc(current->stats.nr_qos_smt_send_ipi);

		smp_send_reschedule(cpu);

	}

}
@@ -9075,6 +9076,7 @@ pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf 
#ifdef CONFIG_QOS_SCHED_SMT_EXPELLER

	if (qos_smt_expelled(this_cpu)) {

		__this_cpu_write(qos_smt_status, QOS_LEVEL_OFFLINE);

		schedstat_inc(rq->curr->stats.nr_qos_smt_expelled);

		return NULL;

	}

#endif