#!/bin/bash
# Tweaks for Hannspad  v0.22
# by Archimed

# Tweaks RAM"
echo 1536,3072,5632,6144,6656,7168 > /sys/module/lowmemorykiller/parameters/minfree;
echo 0,3,5,7,14,15 > /sys/module/lowmemorykiller/parameters/adj;
echo 0 > /sys/module/lowmemorykiller/parameters/debug_level;
echo 64 > /sys/module/lowmemorykiller/parameters/cost;
echo 0 >/proc/sys/vm/oom_kill_allocating_task;
echo 0 >/proc/sys/vm/panic_on_oom;
sysctl -w kernel.panic_on_oops=1;
sysctl -w kerenel.panic=0;
echo 0 > /proc/sys/vm/oom_kill_allocating_task;

# scrolling
setprop windowsmgr.max_events_per_sec 65;

# NEVER kill the launcher, speedup Home return but less free memory
echo -17 > /proc/`pidof com.android.launcher`/oom_adj;

#remounting file systems with noatime nodiratime flags ,save battery and CPU
for x in $(busybox mount | cut -d " " -f3);
do
	if [ "$x" != "/acct" ] &&  [ "$x" != "/dev/cpuctl" ]; then
		sync;
		log -p i -t remount_volume "remount $x noatime nodiratime";
		busybox mount -o remount,noatime,nodiratime $x;
	fi
done;

# Switch CPU frequency to lowest in sleep mode
CUR_MAX_CPU=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq`;

(while [ 1 ];
do
	AWAKE=`cat /sys/power/wait_for_fb_wake`;
	if [ $AWAKE = "awake" ]; then
		echo $CUR_MAX_CPU > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq;
		echo 216000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq;

		echo 5000 > /proc/sys/vm/dirty_expire_centisecs;
		echo 1500 > /proc/sys/vm/dirty_writeback_centisecs;

		log -p i -t Screenstate "script.sh AWAKE -> switching max CPU frequency $CUR_MAX_CPU Mhz";
	fi

	SLEEP=`cat /sys/power/wait_for_fb_sleep`;
	CUR_MAX_CPU=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq`;
	if [ $SLEEP = "sleeping" ]; then
		echo 216000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq;
		echo 216000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq;
		log -p i -t Screenstate "script.sh SLEEP -> switching max CPU frequency 216 Mhz";

		echo 40000 > /proc/sys/vm/dirty_expire_centisecs;
		echo 60000 > /proc/sys/vm/dirty_writeback_centisecs;

		#free pagecache, dentries and inodes:
		echo 3 > /proc/sys/vm/drop_caches;

		#kill some process who use to much cpu in sleep
		newsrepublic=`pidof com.mobilesrepublic.appytablet`;
		mxvideoplayer=`pidof com.mxtech.videoplayer.ad`;
		googlemaps=`pidof com.google.android.apps.maps`;
		gapps=`pidof com.google.process.gapps`;
		gallery=`pidof com.android.gallery3d`;
		voice=`com.google.android.apps.googlevoice`;

		kill $newsrepublic $mxvideoplayer $googlemaps $gapps $voice;
	fi

	sleep 2;
done &);