commit c39d60d11468fa11b0ec5b89b1c32a15c5e99368
author Wei Wang <wvw@google.com> Wed Sep 29 15:35:58 2021 -0700
committer Wei Wang <wvw@google.com> Wed Oct 06 13:04:22 2021 -0700
tree 049f4cf542414d938415332ef07c9f64dfd8bf74
parent 0b23b2a346542946b6b00b5ea7c578998755efd1

libutils: use system_background for low prio tasks in framework

Bug: 201428466
Test: Build and boot check system_server's sched group
Signed-off-by: Wei Wang <wvw@google.com>
Change-Id: Iffc47fdaf3ef8fba6eb01a12cf534a0393e3e91c

libutils/Threads.cpp

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.