sched: Add statistics for qos smt expeller

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I52611
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: NGuan Jing <guanjing6@huawei.com>
Reviewed-by: NChen Hui <judy.chenhui@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

include/linux/sched.h

@@ -461,8 +461,13 @@ struct sched_statistics {
 	u64				nr_wakeups_passive;
 	u64				nr_wakeups_idle;
 
+#if defined(CONFIG_QOS_SCHED_SMT_EXPELLER) && !defined(__GENKSYMS__)
+	u64				nr_qos_smt_send_ipi;
+	u64				nr_qos_smt_expelled;
+#else
 	KABI_RESERVE(1)
 	KABI_RESERVE(2)
+#endif
 	KABI_RESERVE(3)
 	KABI_RESERVE(4)
 #endif
@@ -2172,5 +2177,4 @@ static inline int sched_qos_cpu_overload(void)
 	return 0;
 }
 #endif
-
 #endif

kernel/sched/debug.c

@@ -982,6 +982,10 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
 		P_SCHEDSTAT(se.statistics.nr_wakeups_affine_attempts);
 		P_SCHEDSTAT(se.statistics.nr_wakeups_passive);
 		P_SCHEDSTAT(se.statistics.nr_wakeups_idle);
+#ifdef CONFIG_QOS_SCHED_SMT_EXPELLER
+		P_SCHEDSTAT(se.statistics.nr_qos_smt_send_ipi);
+		P_SCHEDSTAT(se.statistics.nr_qos_smt_expelled);
+#endif
 
 		avg_atom = p->se.sum_exec_runtime;
 		if (nr_switches)

kernel/sched/fair.c

@@ -7455,6 +7455,7 @@ static void qos_smt_send_ipi(int this_cpu)
 		    rq->cfs.h_nr_running == 0)
 			continue;
 
+		schedstat_inc(current->se.statistics.nr_qos_smt_send_ipi);
 		smp_send_reschedule(cpu);
 	}
 }
@@ -7526,6 +7527,7 @@ 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->se.statistics.nr_qos_smt_expelled);
 		return NULL;
 	}
 #endif