Merge changes from topic "sysbg_aosp" am: 1132977223 am: d7c942ad46 am: 808464a9d0 am: 04557e2fd7

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1847154

Change-Id: If86ac12773f741c72849fae81e0e7eb683b74bb0
diff --git a/libprocessgroup/profiles/task_profiles_28.json b/libprocessgroup/profiles/task_profiles_28.json
index 9f83785..56053e0 100644
--- a/libprocessgroup/profiles/task_profiles_28.json
+++ b/libprocessgroup/profiles/task_profiles_28.json
@@ -40,6 +40,19 @@
       ]
     },
     {
+      "Name": "ServicePerformance",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "schedtune",
+            "Path": "background"
+          }
+        }
+      ]
+    },
+    {
       "Name": "HighPerformance",
       "Actions": [
         {
diff --git a/libprocessgroup/profiles/task_profiles_29.json b/libprocessgroup/profiles/task_profiles_29.json
index 9f83785..52279b8 100644
--- a/libprocessgroup/profiles/task_profiles_29.json
+++ b/libprocessgroup/profiles/task_profiles_29.json
@@ -53,6 +53,19 @@
       ]
     },
     {
+      "Name": "ServicePerformance",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "schedtune",
+            "Path": "background"
+          }
+        }
+      ]
+    },
+    {
       "Name": "MaxPerformance",
       "Actions": [
         {
diff --git a/libprocessgroup/profiles/task_profiles_30.json b/libprocessgroup/profiles/task_profiles_30.json
index 9f83785..56053e0 100644
--- a/libprocessgroup/profiles/task_profiles_30.json
+++ b/libprocessgroup/profiles/task_profiles_30.json
@@ -40,6 +40,19 @@
       ]
     },
     {
+      "Name": "ServicePerformance",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "schedtune",
+            "Path": "background"
+          }
+        }
+      ]
+    },
+    {
       "Name": "HighPerformance",
       "Actions": [
         {
diff --git a/libutils/Threads.cpp b/libutils/Threads.cpp
index 540dcf4..6e293c7 100644
--- a/libutils/Threads.cpp
+++ b/libutils/Threads.cpp
@@ -86,8 +86,10 @@
 
         // A new thread will be in its parent's sched group by default,
         // so we just need to handle the background case.
+        // currently set to system_background group which is different
+        // from background group for app.
         if (prio >= ANDROID_PRIORITY_BACKGROUND) {
-            SetTaskProfiles(0, {"SCHED_SP_BACKGROUND"}, true);
+            SetTaskProfiles(0, {"SCHED_SP_SYSTEM"}, true);
         }
 
         if (name) {
@@ -313,7 +315,7 @@
     }
 
     if (pri >= ANDROID_PRIORITY_BACKGROUND) {
-        rc = SetTaskProfiles(tid, {"SCHED_SP_BACKGROUND"}, true) ? 0 : -1;
+        rc = SetTaskProfiles(tid, {"SCHED_SP_SYSTEM"}, true) ? 0 : -1;
     } else if (curr_pri >= ANDROID_PRIORITY_BACKGROUND) {
         SchedPolicy policy = SP_FOREGROUND;
         // Change to the sched policy group of the process.