sched/bt: BT schduler cgroup support

Signed-off-by: Xiaoming Gao <[email protected]>
Signed-off-by: Hua Liu <[email protected]>
Signed-off-by: Xiaogguang Chen <[email protected]>
Signed-off-by: Zhiguang Peng <[email protected]>
Signed-off-by: Bin Fan <[email protected]>
Signed-off-by: He Chen <[email protected]>

Author: heddchen

include/linux/cgroup-defs.h

@@ -90,6 +90,9 @@ enum {
 
 	CFTYPE_NO_PREFIX	= (1 << 3),	/* (DON'T USE FOR NEW FILES) no subsys prefix */
 	CFTYPE_WORLD_WRITABLE	= (1 << 4),	/* (DON'T USE FOR NEW FILES) S_IWUGO */
+#ifdef CONFIG_BT_SCHED
+	CFTYPE_BT_SHARES	= (1 << 5),	/* BT-sched shares */
+#endif
 
 	/* internal flags, do not use outside cgroup core proper */
 	__CFTYPE_ONLY_ON_DFL	= (1 << 16),	/* only on default hierarchy */

include/linux/kernel_stat.h

@@ -29,6 +29,11 @@ enum cpu_usage_stat {
 	CPUTIME_GUEST,
 	CPUTIME_GUEST_NICE,
 #ifdef	CONFIG_BT_SCHED
+	CPUTIME_BT_USER,
+	CPUTIME_BT_NICE,
+	CPUTIME_BT_SYSTEM,
+	CPUTIME_BT_SOFTIRQ,
+	CPUTIME_BT_IRQ,
 	CPUTIME_BT,
 #endif
 	NR_STATS,

include/linux/sched.h

@@ -121,12 +121,6 @@ struct task_group;
 
 #endif
 
-/*
- * Increase resolution of cpu_power calculations
- */
-#define SCHED_POWER_SHIFT	10
-#define SCHED_POWER_SCALE	(1L << SCHED_POWER_SHIFT)
-
 #define SCHED_LOAD_SHIFT	10
 #define SCHED_LOAD_SCALE	(1L << SCHED_LOAD_SHIFT)
 
@@ -400,6 +394,15 @@ struct sched_avg {
 	unsigned long			util_avg;
 };
 
+struct sched_avg_bt {
+	u64 			last_update_time;
+	u64 			load_sum;
+	u32 			util_sum;
+	u32 			period_contrib;
+	unsigned long		load_avg;
+	unsigned long		util_avg;
+};
+
 struct sched_statistics {
 #ifdef CONFIG_SCHEDSTATS
 	u64				wait_start;
@@ -464,6 +467,11 @@ struct sched_entity {
 	struct cfs_rq			*my_q;
 #endif
 
+#ifdef CONFIG_BT_GROUP_SCHED
+	struct bt_rq			*bt_rq;
+	struct bt_rq			*bt_my_q;
+#endif
+
 #ifdef CONFIG_SMP
 	/*
 	 * Per entity load average tracking.
@@ -472,6 +480,9 @@ struct sched_entity {
 	 * collide with read-mostly values above.
 	 */
 	struct sched_avg		avg ____cacheline_aligned_in_smp;
+#ifdef CONFIG_BT_SCHED
+	struct sched_avg_bt		bt_avg;
+#endif
 #endif
 };
 

init/Kconfig

@@ -730,6 +730,11 @@ config FAIR_GROUP_SCHED
 	depends on CGROUP_SCHED
 	default CGROUP_SCHED
 
+config BT_GROUP_SCHED
+	bool "Group scheduling for SCHED_BT"
+	depends on CGROUP_SCHED
+	default CGROUP_SCHED
+
 config CFS_BANDWIDTH
 	bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 	depends on FAIR_GROUP_SCHED