From c3991a7150fee5ffd81016610eb5c306d457a216 Mon Sep 17 00:00:00 2001
From: Miao Wang <miaowang@google.com>
Date: Fri, 7 Feb 2020 15:01:24 -0800
Subject: [PATCH] Add an stune group for NNAPI HAL

 - schedtune.prefer_idle 1
 - schedtune.boost 1

Test: mm
Test: configure NNAPI HAL to use nnapi-hal stune
Test: measure perf difference using MLTS benchmark

Change-Id: I5f467c6a58f2c1da40ec8276e101defc808854a3
(cherry picked from commit 1d748feaec5db7a35066f53f8e5edaf22520c02d)
---
 rootdir/init.rc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 896745bec..9458e2314 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -144,6 +144,14 @@ on init
     chmod 0664 /dev/stune/top-app/tasks
     chmod 0664 /dev/stune/rt/tasks
 
+    # Create an stune group for NNAPI HAL processes
+    mkdir /dev/stune/nnapi-hal
+    chown system system /dev/stune/nnapi-hal
+    chown system system /dev/stune/nnapi-hal/tasks
+    chmod 0664 /dev/stune/nnapi-hal/tasks
+    write /dev/stune/nnapi-hal/schedtune.boost 1
+    write /dev/stune/nnapi-hal/schedtune.prefer_idle 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.