sched: Introduce dynamic affinity for cfs scheduler

hulk inclusion
category: feature
bugzilla: 187173, https://gitee.com/openeuler/kernel/issues/I5G4IH


CVE: NA

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

Dynamic affinity set preferred cpus for task. When the utilization of
taskgroup's preferred cpu is low, task only run in cpus preferred to
enhance cpu resource locality and reduce interference between task cgroups,
otherwise task can burst preferred cpus to use external cpu within
cpus allowed.

Signed-off-by: Hui Tang <tanghui20@huawei.com>
Reviewed-by: Zhang Qiao <zhangqiao22@huawei.com>
Reviewed-by: Chen Hui <judy.chenhui@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>

init/Kconfig

@@ -823,6 +823,16 @@ config RT_GROUP_SCHED
 
 endif #CGROUP_SCHED
 
+config QOS_SCHED_DYNAMIC_AFFINITY
+	bool "qos dynamic affinity"
+	depends on CPUSETS
+	default n
+	help
+	 This feature lets you allocate preferred cpus to taskgroup. If enabled,
+	 it will make taskgroup only to use preferred cpus when cpu utilization
+	 of taskgroup is below threshold setted, otherwise make taskgroup to use
+	 cpus allowed.
+
 config CGROUP_PIDS
 	bool "PIDs controller"
 	help