commit c6baa19d6c53f94b48ada031b9ce6244e7ff2fbc
author Suren Baghdasaryan <surenb@google.com> Tue Oct 13 10:41:00 2020 -0700
committer Rick Yiu <rickyiu@google.com> Thu Oct 29 16:52:18 2020 +0000
tree d346f43fb965615d94d1aa975a12af52f153a40c
parent 1b53c2496dca274bd3f8173780a7d6562b5cc016

init: Add cpu controller hierarchy to use utilclamp controller

For devices using utilclamp create cpu controller hierarchy. Do not
remove schedtune hierarchy yet because init.rc is generic and should
work with devices which still use schedtune.

Bug: 170507876
Test: cpuctl groups worked
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I8494b0b64336e0c882847d555c262814bef2ffa1

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 900edb4..746fc61 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -148,6 +148,27 @@
     chmod 0664 /dev/stune/top-app/tasks
     chmod 0664 /dev/stune/rt/tasks
 
+    # cpuctl hierarchy for devices using utilclamp
+    mkdir /dev/cpuctl/foreground
+    mkdir /dev/cpuctl/background
+    mkdir /dev/cpuctl/top-app
+    mkdir /dev/cpuctl/rt
+    chown system system /dev/cpuctl
+    chown system system /dev/cpuctl/foreground
+    chown system system /dev/cpuctl/background
+    chown system system /dev/cpuctl/top-app
+    chown system system /dev/cpuctl/rt
+    chown system system /dev/cpuctl/tasks
+    chown system system /dev/cpuctl/foreground/tasks
+    chown system system /dev/cpuctl/background/tasks
+    chown system system /dev/cpuctl/top-app/tasks
+    chown system system /dev/cpuctl/rt/tasks
+    chmod 0664 /dev/cpuctl/tasks
+    chmod 0664 /dev/cpuctl/foreground/tasks
+    chmod 0664 /dev/cpuctl/background/tasks
+    chmod 0664 /dev/cpuctl/top-app/tasks
+    chmod 0664 /dev/cpuctl/rt/tasks
+
     # Create an stune group for NNAPI HAL processes
     mkdir /dev/stune/nnapi-hal
     chown system system /dev/stune/nnapi-hal
@@ -156,6 +177,14 @@
     write /dev/stune/nnapi-hal/schedtune.boost 1
     write /dev/stune/nnapi-hal/schedtune.prefer_idle 1
 
+    # cpuctl hierarchy for devices using utilclamp
+    mkdir /dev/cpuctl/nnapi-hal
+    chown system system /dev/cpuctl/nnapi-hal
+    chown system system /dev/cpuctl/nnapi-hal/tasks
+    chmod 0664 /dev/cpuctl/nnapi-hal/tasks
+    write /dev/cpuctl/nnapi-hal/cpu.uclamp.min 1
+    write /dev/cpuctl/nnapi-hal/cpu.uclamp.latency_sensitive 1
+
     # Create blkio group and apply initial settings.
     # This feature needs kernel to support it, and the
     # device's init.rc must actually set the correct values.