sched: ems: renewal prefer perf

Modify the structure of prefer perf to work with PCF

Change-Id: Ic26874ecd074645031ecac933999f5e488f4f2b1
Signed-off-by: Park Bumgyu <bumgyu.park@samsung.com>

diff --git a/kernel/sched/ems/st_addon.c b/kernel/sched/ems/st_addon.c
index d4b371f6f5c405881d6e46f6397119647c9c1551..04c088b1af7a8a54f1fe257f18e9fefa0f4fdcbb 100644 (file)
--- a/kernel/sched/ems/st_addon.c
+++ b/kernel/sched/ems/st_addon.c
@@ -6,10 +6,13 @@
  */
 
 #include <linux/sched.h>
+#include <linux/kobject.h>
+#include <linux/ems.h>
 #include <trace/events/ems.h>
 
 #include "ems.h"
 #include "../sched.h"
+#include "../tune.h"
 
 static inline unsigned long task_util(struct task_struct *p)
 {
@@ -38,11 +41,36 @@ static inline unsigned long cpu_util_wake(int cpu, struct task_struct *p)
 /**********************************************************************
  *                            Prefer Perf                             *
  **********************************************************************/
+/*
+ * If the prefger_perf of the group to which the task belongs is set, the task
+ * is assigned to the performance cpu preferentially.
+ */
 int prefer_perf_cpu(struct task_struct *p)
 {
-       return -1;
+       if (schedtune_prefer_perf(p) <= 0)
+               return -1;
+
+       return select_perf_cpu(p);
 }
 
+int kernel_prefer_perf(int grp_idx);
+static ssize_t show_prefer_perf(struct kobject *kobj,
+               struct kobj_attribute *attr, char *buf)
+{
+       int i, ret = 0;
+
+       /* shows the prefer_perf value of all schedtune groups */
+       for (i = 0; i < STUNE_GROUP_COUNT; i++)
+               ret += snprintf(buf + ret, 10, "%d ", kernel_prefer_perf(i));
+
+       ret += snprintf(buf + ret, 10, "\n");
+
+       return ret;
+}
+
+static struct kobj_attribute prefer_perf_attr =
+__ATTR(kernel_prefer_perf, 0444, show_prefer_perf, NULL);
+
 /**********************************************************************
  *                            Prefer Idle                             *
  **********************************************************************/
@@ -156,3 +184,18 @@ int group_balancing(struct task_struct *p)
 {
        return -1;
 }
+
+/**********************************************************************
+ *                          Sysfs interface                           *
+ **********************************************************************/
+static int __init init_st_addon_sysfs(void)
+{
+       int ret;
+
+       ret = sysfs_create_file(ems_kobj, &prefer_perf_attr.attr);
+       if (ret)
+               pr_err("%s: faile to create sysfs file\n", __func__);
+
+       return 0;
+}
+late_initcall(init_st_addon_sysfs);