diff --git a/rootdir/init.rc b/rootdir/init.rc
index 544269007..277a785fe 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -250,6 +250,18 @@ on init
     write /dev/blkio/blkio.group_idle 0
     write /dev/blkio/background/blkio.group_idle 0
 
+    # Setup cpu.shares to throttle background groups (bg ~ 5% sysbg ~ 5% dex2oat ~2.5%)
+    write /dev/cpuctl/background/cpu.shares 1024
+    write /dev/cpuctl/system-background/cpu.shares 1024
+    write /dev/cpuctl/dex2oat/cpu.shares 512
+    write /dev/cpuctl/system/cpu.shares 20480
+    # We only have system and background groups holding tasks and the groups below are empty
+    write /dev/cpuctl/camera-daemon/cpu.shares 20480
+    write /dev/cpuctl/foreground/cpu.shares 20480
+    write /dev/cpuctl/nnapi-hal/cpu.shares 20480
+    write /dev/cpuctl/rt/cpu.shares 20480
+    write /dev/cpuctl/top-app/cpu.shares 20480
+
     restorecon_recursive /mnt
 
     mount configfs none /config nodev noexec nosuid