From c815f700e07357a6b8c3977f93fcd676ace8110d Mon Sep 17 00:00:00 2001
From: Steve Kondik <steve@cyngn.com>
Date: Wed, 16 Sep 2015 15:08:48 -0700
Subject: [PATCH] cm: Set IOPS mode for CFQ and BFQ automatically

 * Always set slice_idle to 0 for CFQ and BFQ (IOPS mode).
   This is a guaranteed performance boost for nonrotational storage
   and is also the new default in Linux 4.2+

Change-Id: Id271a4283219beb272c174de0e452c6c42c4e572
---
 prebuilt/common/etc/init.local.rc | 35 +++++++++++++++++++------------
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/prebuilt/common/etc/init.local.rc b/prebuilt/common/etc/init.local.rc
index 7abf3d7f..a38f62c0 100644
--- a/prebuilt/common/etc/init.local.rc
+++ b/prebuilt/common/etc/init.local.rc
@@ -25,7 +25,7 @@ on init
 
     # Realtime display class
     mkdir /sys/fs/cgroup/bfqio/rt-display 0755 root system
-    write /sys/fs/cgroup/bfqio/rt-display/bfqio.ioprio_class 1 
+    write /sys/fs/cgroup/bfqio/rt-display/bfqio.ioprio_class 1
     write /sys/fs/cgroup/bfqio/rt-display/bfqio.ioprio 7
     write /sys/fs/cgroup/bfqio/rt-display/bfqio.weight 1000
     chown system graphics /sys/fs/cgroup/bfqio/rt-display/tasks
@@ -42,7 +42,7 @@ on init
     # Hipri class
     mkdir /sys/fs/cgroup/bfqio/hipri 0755 root system
     write /sys/fs/cgroup/bfqio/hipri/bfqio.ioprio_class 2
-    write /sys/fs/cgroup/bfqio/hipri/bfqio.ioprio 2 
+    write /sys/fs/cgroup/bfqio/hipri/bfqio.ioprio 2
     write /sys/fs/cgroup/bfqio/hipri/bfqio.weight 1000
     chown root system /sys/fs/cgroup/bfqio/hipri/tasks
     chmod 0666 /sys/fs/cgroup/bfqio/hipri/tasks
@@ -165,10 +165,24 @@ on boot
     # Persistent properties (only created if persist exists)
     mkdir /persist/properties 0770 system system
 
+# sysinit (/system/etc/init.d)
+service sysinit /system/bin/sysinit
+    user root
+    oneshot
+    disabled
+
+# bugreport is triggered by holding down volume down, volume up and power
+service bugreport /system/bin/dumpstate -d -p -B \
+        -o /data/data/com.android.shell/files/bugreports/bugreport
+    oneshot
+    disabled
+    keycodes 114 115 116
+
 # adb over network
 on property:service.adb.tcp.port=5555
     stop adbd
     start adbd
+
 on property:service.adb.tcp.port=-1
     stop adbd
     start adbd
@@ -189,15 +203,10 @@ on property:sys.io.scheduler=*
 on property:persist.sys.io.scheduler=*
     setprop sys.io.scheduler ${persist.sys.io.scheduler}
 
-# sysinit (/system/etc/init.d)
-service sysinit /system/bin/sysinit
-    user root
-    oneshot
-    disabled
+# Set slice_idle to 0 for CFQ
+on property:sys.io.scheduler=cfq
+    write /sys/block/mmcblk0/queue/iosched/slice_idle 0
 
-# bugreport is triggered by holding down volume down, volume up and power
-service bugreport /system/bin/dumpstate -d -p -B \
-        -o /data/data/com.android.shell/files/bugreports/bugreport
-    oneshot
-    disabled
-    keycodes 114 115 116
+# Set slice_idle to 0 for BFQ
+on property:sys.io.scheduler=bfq
+    write /sys/block/mmcblk0/queue/iosched/slice_idle 0
\ No newline at end of file