#!/system/bin/sh
# Optimizing your device
# Created Aris setiawan @ 2014
# Modified script by BanditGR @ xiaomi-miui.gr
# 1.1 Added more tweaks, commented out bad code that does nothing

#Set a working path
cd /data/

# Smart mounting
mount -o noatime,remount,rw,discard,barrier=0,commit=60,noauto_da_alloc,delalloc /cache /cache;
mount -o noatime,remount,rw,discard,barrier=0,commit=60,noauto_da_alloc,delalloc /data /data;

# Tweaking processes at wake modified by me
 (Thanks Slaid480@XDA)
# Corrected by BanditGR @ xiaomi-miui.gr
renice 17 -p $(pgrep com.miui.home) # MIUI Launcher
renice 17 -p $(pgrep com.teslacoilsw.launcher) # Nova Launcher
renice 20 -p $(pgrep com.android.phone)
renice 18 -p $(pgrep com.android.contacts) # Contact app
renice 18 -p $(pgrep com.android.mms) # Text message app
renice 18 -p $(pgrep com.google.android.inputmethod.latin) # Keyboard
renice 18 -p $(pgrep com.nuance.swype.dtc) # Swype Keyboard
renice 10 -p $(pgrep com.sec.android.app.controlpanel) # Task manager
renice 18 -p $(pgrep com.android.systemui) # Status bar
renice 18 -p $(pgrep com.android.settings) # Settings menu
renice 17 -p $(pgrep com.android.vending) # Market app
renice 15 -p $(pgrep com.android.camera) # Camera app
renice 18 -p $(pgrep com.android.browser) # Browser app
renice 18 -p $(pgrep mobi.mgeek.TunnyBrowser) # Dolphin Browser app
renice 3 -p $(pgrep com.android.providers.media) # Media app
renice 15 -p $(pgrep com.google.android.gms) # Google app
renice 3 -p $(pgrep com.process.acore)
renice 3 -p $(pgrep android.process.acore)


# Touch Tweaks
# Only execute if the system supports set_touchscreen
if [ -e /sys/class/touch/switch/set_touchscreen ]; then
echo 7025 > /sys/class/touch/switch/set_touchscreen;
echo 8002 > /sys/class/touch/switch/set_touchscreen;
echo 11001 > /sys/class/touch/switch/set_touchscreen;
echo 13030 > /sys/class/touch/switch/set_touchscreen;
echo 14005 > /sys/class/touch/switch/set_touchscreen;
fi;

# Network Speed Tweaks
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
echo 1 > /proc/sys/net/ipv4/tcp_sack
echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
echo 1 > /proc/sys/net/ipv4/tcp_window_scaling
echo 5 > /proc/sys/net/ipv4/tcp_keepalive_probes
echo 30 > /proc/sys/net/ipv4/tcp_keepalive_intvl
echo 900 > /proc/sys/net/ipv4/tcp_keepalive_time
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
echo 404480 > /proc/sys/net/core/wmem_max
echo 404480 > /proc/sys/net/core/rmem_max
echo 256960 > /proc/sys/net/core/rmem_default
echo 256960 > /proc/sys/net/core/wmem_default
echo 4096 16384 404480 > /proc/sys/net/ipv4/tcp_wmem
echo 4096 16384 404480 > /proc/sys/net/ipv4/tcp_rmem

# Kill media app
# Better to just use busybox here
busybox pkill -9 android.process.media;
busybox pkill -9 mediaserver;

# Optimizing flags
# This doesn't appear to do anything either, code is missing in do loop
#LOOP=`ls -d /sys/block/loop*`;
#RAM=`ls -d /sys/block/ram*`;
#MMC=`ls -d /sys/block/mmc*`;
#for j in $LOOP $RAM
#do
#echo "0" 
#done

# Hard rock kernel tweaks.
echo 0 > /proc/sys/vm/panic_on_oom
echo 0 > /proc/sys/kernel/panic
echo 0 > /proc/sys/kernel/panic_on_oops

# Sd Card Read Write Speed
# A previous script already set these values
#echo "2048" > /sys/devices/virtual/bdi/179:32/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:0/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:1/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:2/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:3/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:4/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:5/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:6/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/7:7/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/179:0/read_ahead_kb
#echo "2048" > /sys/devices/virtual/bdi/default/read_ahead_kb
echo "97" > /sys/devices/virtual/bdi/default/max_ratio
echo "97" > /sys/devices/virtual/bdi/179:0/max_ratio

# Kernel | fs tweak
sysctl -w kernel.msgmni=1024
sysctl -w kernel.msgmax=64000
sysctl -w kernel.shmmax=268435456
sysctl -w kernel.shmall=2097152
sysctl -w kernel.sem="500 512000 100 2048"
sysctl -w kernel.threads-max=10000
sysctl -w fs.lease-break-time=10
sysctl -w fs.file-max=65536


# New I/O Boost Tweak and Misc Experimental Tweaks
# MCPS
if [ -f "/sys/devices/system/cpu/sched_mc_power_savings" ]; then
busybox echo "1" > /sys/devices/system/cpu/sched_mc_power_savings;
fi;

# I/O boost tweak
for S in /sys/block/*
do
  if [ -f $S/queue/rq_affinity ]; then
    busybox echo "1" > $S/queue/rq_affinity
  fi
	if [ -f $S/queue/rotational ]; then
		busybox echo "0" > $S/queue/rotational
	fi
	if [ -f $S/queue/iostats ]; then
		busybox echo "0" > $S/queue/iostats
	fi
	if [ -f $S/queue/nomerges ]; then
		busybox echo "1" > $S/queue/nomerges
	fi
	if [ -e $S/queue/add_random ]; then
		busybox echo "0" > $S/queue/add_random
    fi
done

# Activating I/O extended queue
MMC=/sys/block/mmc*
for S in $MMC;
do
	if [ -f $S/queue/nr_requests ]; then
		busybox echo "1024" > $S/queue/nr_requests
	fi
done

# Kernel samepage merging
if [ -f "/sys/kernel/mm/ksm" ]; then
busybox chmod 644 /sys/kernel/mm/ksm/*
busybox echo "1" > /sys/kernel/mm/ksm/run
busybox echo "64" > /sys/kernel/mm/ksm/pages_to_scan
busybox echo "500" > /sys/kernel/mm/ksm/sleep_millisecs
fi;


# Ram tweaks
# This doesn't work
#/bin/mount -o remount,rw /
#/bin/rm -r /voodoo/root/usr/*
#/bin/mount -o remount,ro /
#rngd