commit ed60788968be61f4f6f47890e5f3cb182a6a2b6e
author Todd Kjos <tkjos@google.com> Mon Oct 26 16:22:11 2015 -0700
committer Rom Lemarchand <romlem@google.com> Mon Nov 16 08:53:04 2015 -0800
tree f47409d2755576b1e11cadcb5259803e0a2defd8
parent 1589fa1bda5d8e990c0a0f9a72841b8fa52899ed

Actively mangage EAS schedtune nodes

Move foreground tasks to /sys/fs/cgroup/stune/boost/tasks (boosted
weight in EAS scheduler). Move background tasks to
/sys/fs/cgroup/stune/tasks (default weight). For services started
with init, set "foreground" services to boosted.

Change-Id: I0e489fad9510727c13e6754dabaf311c2391f395

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 317207c..ef20c7a 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -48,6 +48,17 @@
     chown root system /sys/fs/cgroup/memory/sw/tasks
     chmod 0660 /sys/fs/cgroup/memory/sw/tasks
 
+    # Create energy-aware scheduler tuning nodes
+    mkdir /sys/fs/cgroup/stune
+    mount cgroup none /sys/fs/cgroup/stune schedtune
+    mkdir /sys/fs/cgroup/stune/foreground
+    chown system system /sys/fs/cgroup/stune
+    chown system system /sys/fs/cgroup/stune/foreground
+    chown system system /sys/fs/cgroup/stune/tasks
+    chown system system /sys/fs/cgroup/stune/foreground/tasks
+    chmod 0664 /sys/fs/cgroup/stune/tasks
+    chmod 0664 /sys/fs/cgroup/stune/foreground/tasks
+
     mkdir /system
     mkdir /data 0771 system system
     mkdir /cache 0770 system cache
@@ -165,13 +176,16 @@
     chown system system /dev/cpuset/foreground
     chown system system /dev/cpuset/foreground/boost
     chown system system /dev/cpuset/background
+    chown system system /dev/cpuset/system-background
     chown system system /dev/cpuset/tasks
     chown system system /dev/cpuset/foreground/tasks
     chown system system /dev/cpuset/foreground/boost/tasks
     chown system system /dev/cpuset/background/tasks
+    chown system system /dev/cpuset/system-background/tasks
     chmod 0664 /dev/cpuset/foreground/tasks
     chmod 0664 /dev/cpuset/foreground/boost/tasks
     chmod 0664 /dev/cpuset/background/tasks
+    chmod 0664 /dev/cpuset/system-background/tasks
     chmod 0664 /dev/cpuset/tasks
 
 
@@ -646,7 +660,7 @@
     user system
     group graphics drmrpc
     onrestart restart zygote
-    writepid /dev/cpuset/system-background/tasks
+    writepid /sys/fs/cgroup/stune/foreground/tasks /dev/cpuset/system-background/tasks
 
 service drm /system/bin/drmserver
     class main