转-android省电开发之cpu降频

TODO / By / 2016-05-25

 

http://blog.csdn.net/matrix_xu/article/details/8509319

 

众所周知，在Android系 统的耗电量排行里，cpu的耗电占了比较大的一部分比例，也就是说，cpu的使用率和使用频率将直接或间接的影响电量的分配和使用，但很遗 憾，android-sdk中没有为android的开发者提供类似cpu管理的功能，但是当下很多省电类应用或专业的cpu管理软件都提供了cpu的降 频甚至是超频的功能，那么这样的功能是如何实现的，本文将详细说明在android环境下调整cpu频率的一些方法，仅供参考。

按照我写文章的风格，在阐述过程和结论之前，都不得不对关键性的概念做一下解释，本文也不例外。

 

1.CPU的工作频率

单位赫兹或者兆赫兹，具体含义不解释，说实话也不太清楚，不过可以确认一点的是，CPU的工作频率越高，耗电量越大，反之亦然。我们做这个模块省电的终极目标就是降低cpu的工作频率。

2.CPU的调控模式

英文词为:Governor，解释为调速器，控制器。大家 都指导android的framework是基于linux平台的，那么cpu的管理体系这块也跟linux基本上一样，其中包括cat命令，和一些文件 的读写配置都是基本上差不多的。Linux在管理CPU方面，提供了如下集中调控模式，分别为：

 

 

Governor Select this governor if How it works
performance Performance is the only consideration. Sets the CPU to run at the highest frequency (scaling_max_freq)
powersave Efficiency is the only consideration Sets the CPU to run at the lowest frequency (scaling_min_freq)
ondemand Adaptation to the current load is the main consideration. Checks the load regularly. When the load rises aboveup_threshold, sets the CPU to run at the highest frequency (scaling_max_freq). When the load falls below the same threshold, sets the CPU to run at the next lowest frequency. Causes less latency than the conservative governor.
conservative Close adaptation to the current load is the consideration. Checks the load regularly. When the load rises aboveup_threshold, sets the CPU to run at the next highest frequency. When the load falls belowdown_threshold, sets the CPU to run at the next lowest frequency. Has more latency than the ondemand governor.
userspace Control by other user space program is preferred. Sets the CPU frequency to the value specified by the user space program (through the use of thescaling_setspeed parameter).

这个表格的出自：http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaai%2Fcpufreq%2FTheCPUFreqGovernors.htm

按照原文给出的解释，我大概把这5种调控模式理解为一下几种观点，如有不足，还请指正！

1.performance,这个不多说，就是将cpu的工作频率调整到最大模式，让cpu充分的工作。

2.powersave,将cpu的工作频率调整到节能模式，也就是这个模式下的cpu平率是最低的。

3.ondemand,定期检查负载。当负荷超越了阈值, 设置的CPU运行以最高的频率。当负载低于相同的阈值,设置的CPU运行在下一个的最低频率。导致更少的延迟比。这个理解起来可能比较困难，我用白话大概 解释一下，ondemand从字面翻译是“根据需求，按照需要”，cpu在工作的时候频率会在一个最大值和最小值之间波动，当负载提高时，该调控期会自动 提高cpu的频率，反之亦然。“Causes less latency than the conservative governor.”这句话的意思是，该模式跟conservative相比，会导致更少的延迟。ok，那让我们再看看conservative是如何解 释的。

4.conservative，改词用来形容保守的，守旧 的。该模式与ondemand的最大区别在于，conservative模式不会立刻在负载增加的情况下将cpu频率调整到最大，他会调整到比目前频率稍 微大的频段去工作，保守，实在是保守！所以换来的结果是，在某种极端情况下，该模式的延迟会大于ondemand。

5.usersapce，该模式将cpu的掌控权交给了用 户态，也就是交给了应用程序，应用程序可以通过配置文件的方式修改cpu的频率信息，上面3种模式好比linux已经给你定义好的4种模 式，userspace好比上面4种模式无法满足我的需求，我需要自定义！(由于第四种方式需要进行大量的文件操作和配置，本文不阐述了，与省电的目标相 差比较远)

 

ok！我们了解了这5种省电模式，那么如何查看你的android手机当前运行在哪种模式下呢？当前的cpu运行的工作频率是多少呢？最大最小频率是多少？我如何修改模式呢？

其实很简单，android的cat命令都为我们解决了这些问题，首先要强调的是，必须要获得系统的root权限，才能进行以下操作。

 

第一步：adb shell 进入root 命令行模式

第二步 cd /sys/devices/system/cpu/cpu0/cpufreq 进入这个目录下面

第三步 ls

第四步 你能看见很多的文件

第五步 参考下面的命令，打一遍就清楚了，不过为了给傻瓜提供更好的服务，我还是尽可能的将命令的使用和作用写的详细。

/**
* cpu cat命令大全
* cat [%cpuFreqPath%]/cpuinfo_cur_freq   (当前cpu频率)
* cat [%cpuFreqPath%]/cpuinfo_max_freq  (最大cpu频率)
* cat [%cpuFreqPath%]/cpuinfo_min_freq  (最小cpu频率)
* cat [%cpuFreqPath%]/related_cpus  (cpu数量标号,从0开始,如果是双核,结果为0,1)
* cat [%cpuFreqPath%]/scaling_available_frequencies  (cpu所有可用频率)
* cat [%cpuFreqPath%]/scaling_available_governors  (cpu所有可用调控模式)
* cat [%cpuFreqPath%]/scaling_available_governors  (cpu所有可用调控模式)
* cat [%cpuFreqPath%]/scaling_cur_freq  (?????)
* cat [%cpuFreqPath%]/scaling_driver (调控驱动)
* cat [%cpuFreqPath%]/scaling_governor (当前使用哪种调控模式)
* cat [%cpuFreqPath%]/scaling_max_freq (?????)
* cat [%cpuFreqPath%]/scaling_min_freq (?????)
* cat [%cpuFreqPath%]/scaling_setspeed (?????)
* cat [%cpuFreqPath%]/cpuinfo_transition_latency (变频延迟)
*/

 

熟悉了这些语法和密令之后，我们就可以很轻松的明白，如何省电了，无非就是将cpu降频嘛，把当前的调控模式调整为powersave就可以了嘛，不错，但是还不完全正确。

首先我先讲一下如何通过命令行改写当前的调控模式，很简单，一句命令：

echo “你想使用的调控模式” /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

 

但是因为手机出场适配等问题，有些机器上是没有 powersave这个模式的，对了，你一定要确认当前手机是否有powersave这个模式，具体怎么看就在我上面给的命令大全里面，自己找！在没有 powersave模式的情况下，我们只好通过更狠的方法修改cpu的频率，那就是直接改写cpu的频率，命令：

echo 2331000 > cpu0/cpufreq/scaling_min_freq  设置最小的工作频率，同时也可以设置最大的工作频率。

ok！设置cpu的频率的两种方式我基本上说清楚了，本质没什么差别。那么在实际java端的开发中，我们如何使用呢？

贴贴代码吧，不做过多的解释了，相信大家多能读懂！

 

 

 

 

[java] view plain copy

  1. <span style=“font-family:Microsoft YaHei;”>/**
  2.  * @author matrixxu
  3.  * 
  4.  */
  5. public class CPUFreqSetting {
  6.     /**
  7.      * cpu cat命令大全
  8.      * cat [%cpuFreqPath%]/cpuinfo_cur_freq   (当前cpu频率)
  9.      * cat [%cpuFreqPath%]/cpuinfo_max_freq     (最大cpu频率)
  10.      * cat [%cpuFreqPath%]/cpuinfo_min_freq     (最小cpu频率)
  11.      * cat [%cpuFreqPath%]/related_cpus     (cpu数量标号,从0开始,如果是双核,结果为0,1)
  12.      * cat [%cpuFreqPath%]/scaling_available_frequencies    (cpu所有可用频率)
  13.      * cat [%cpuFreqPath%]/scaling_available_governors  (cpu所有可用调控模式)
  14.      * cat [%cpuFreqPath%]/scaling_available_governors  (cpu所有可用调控模式)
  15.      * cat [%cpuFreqPath%]/scaling_cur_freq     (?????)
  16.      * cat [%cpuFreqPath%]/scaling_driver   (?????)
  17.      * cat [%cpuFreqPath%]/scaling_governor (?????)
  18.      * cat [%cpuFreqPath%]/scaling_max_freq (?????)
  19.      * cat [%cpuFreqPath%]/scaling_min_freq (?????)
  20.      * cat [%cpuFreqPath%]/scaling_setspeed (?????)
  21.      * cat [%cpuFreqPath%]/cpuinfo_transition_latency   (?????)
  22.      */
  23.     private final String TAG = “SetCPU”;
  24.     private final String cpuFreqPath = “/sys/devices/system/cpu/cpu0/cpufreq”;
  26.     private final static String PERFORMANCE_GOVERNOR = “performance”;
  27.     private final static String POWER_SAVE_GOVERNOR = “performance”;
  28.     private final static String ONDEMAND_GOVERNOR = “performance”;
  29.     private final static String CONSERVATIVE_GOVERNOR = “performance”;
  30.     private final static String USERSAPCE_GOVERNOR = “performance”;
  32. //  public void powerSaveGovernor() {
  33. //      List<String> governors = readCpuGovernors();
  34. //      if (governors.contains(object)) {
  35. //
  36. //      }
  37. //  }
  39.     /**
  40.      * 获得当前CPU调控模式
  41.      */
  42.     public void getCpuCurGovernor() {
  43.         try {
  44.             DataInputStream is = null;
  45.             Process process = Runtime.getRuntime().exec(“cat “ + cpuFreqPath + “/scaling_governor”);
  46.             is = new DataInputStream(process.getInputStream());
  47.             String line = is.readLine();
  48.         } catch (IOException e) {
  49.             e.printStackTrace();
  50.         }
  51.     }
  53.     /**
  54.      * 重写CPU调控模式
  55.      * @param governor
  56.      * @return
  57.      */
  58.     private boolean writeCpuGovernor(String governor) {
  59.         DataOutputStream os = null;
  60.         byte[] buffer = new byte[256];
  61.         String command = “echo “ + governor + ” > “ + cpuFreqPath + “/scaling_governor”;
  62.         Log.i(TAG, “command: “ + command);
  63.         try {
  64.             Process process = Runtime.getRuntime().exec(“su”);
  65.             os = new DataOutputStream(process.getOutputStream());
  66.             os.writeBytes(command + “\n”);
  67.             os.writeBytes(“exit\n”);
  68.             os.flush();
  69.             process.waitFor();
  70.             Log.i(TAG, “exit value = “ + process.exitValue());
  71.         } catch (IOException e) {
  72.             Log.i(TAG, “writeCpuGovernor: write CPU Governor(“ + governor + “) failed!”);
  73.             return false;
  74.         } catch (InterruptedException e) {
  75.             e.printStackTrace();
  76.         }
  77.         return true;
  78.     }
  80.     /**
  81.      * 获得CPU所有调控模式
  82.      * @return
  83.      */
  84.     private List<String> readCpuGovernors() {
  85.         List<String> governors = new ArrayList<String>();
  86.         DataInputStream is = null;
  87.         try {
  88.             Process process = Runtime.getRuntime().exec(“cat “ + cpuFreqPath + “/scaling_available_governors”);
  89.             is = new DataInputStream(process.getInputStream());
  90.             String line = is.readLine();
  92.             String[] strs = line.split(” “);
  93.             for (int i = 0; i < strs.length; i++)
  94.                 governors.add(strs[i]);
  95.         } catch (IOException e) {
  96.             Log.i(TAG, “readCpuGovernors: read CPU Governors failed!”);
  97.         }
  98.         return governors;
  99.     }
  100. }</span>

完！

分解boot.img看到这段代码是与CPU相关的  我主要是想将CPU电压和频率降低  解决发热和延长待机
说实话感觉4核有点性能过剩。平时适用我想将CPU频率降低到1.35MHZ已经做够了  最好可以关停2个
核心。
请大神指教如何修改   谢谢！

#

# Copyright 2012 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the “License”);
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an “AS IS” BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

 

import init.aries.usb.rc
import init.aries_svelte.rc

 

on early-init
    mount debugfs debugfs /sys/kernel/debug
    chown system system /sys/kernel/debug/kgsl/proc

 

on init
    # See storage config details at http://source.android.com/tech/storage/
    mkdir /storage 0775 system system
    mkdir /mnt/media_rw/sdcard0 0700 media_rw media_rw
    mkdir /mnt/media_rw/usbdisk 0700 media_rw media_rw
    mkdir /storage/sdcard0 0775 system system
    mkdir /storage/usbdisk 0775 system system

 

    # Set permissions for persist partition
    mkdir /persist 0771 system system
    mkdir /firmware 0771 system system

 

    export EXTERNAL_STORAGE /storage/sdcard0

 

    # Support legacy paths
    symlink /storage/sdcard0 /sdcard
    symlink /storage/sdcard0 /mnt/sdcard
    symlink /storage/usbdisk /usbdisk
    symlink /storage/usbdisk /mnt/usbdisk

 

    # Setup custom emergency number list based on
    # the MCC. This is needed by RIL.
    setprop persist.radio.custom_ecc “1”
    setprop persist.radio.custom_ecc_mcc “{234,235,424,426,427,430,431:999},{334:060,066},{422:9999},{730:133}”
    setprop persist.radio.custom_ecc_mcc_ex “{450:111,112,113,119,122,125,127},{724:190}”
    setprop persist.radio.custom_ecc_voice “{515:117},{452:113,114,115}”
    setprop persist.radio.custom_ecc_hard “911,*911,#911,112,999,000,08,118,120,122,110,119,995,111,113,125,127,133”

 

on fs
    exec /sbin/dualboot_init ./fstab.aries
    mount_all ./fstab.aries.patched
    restorecon /persist
    restorecon /persist/bluetooth
    restorecon /persist/bluetooth/.bdaddr
    restorecon /persist/playready
    restorecon /persist/playready/dxhdcp2
    restorecon /persist/playready/dxhdcp2/acGSIRU1TX-2o-nJ69e1aFGgUxE_
    restorecon /persist/playready/dxhdcp2/acGSIRU1TX-2o-nJ69e1aFGgUxE_/etK7oituoft7bxrO5H7GIVuhEQM_
    restorecon /persist/playready/dxhdcp2/acGSIRU1TX-2o-nJ69e1aFGgUxE_/zttE+GVYd9YzREzMHiKY-IlERZM_
    restorecon /persist/sensors
    restorecon /persist/sensors/sns.reg
    restorecon /persist/widevine
    restorecon /persist/widevine/5dsokxEEDXgQhkN50bp-Z2K5InM_
    restorecon /persist/widevine/5dsokxEEDXgQhkN50bp-Z2K5InM_/RXFABDUxyT6Q+Zwx9ZhPGOq2Bq8_
    restorecon /persist/widevine/5dsokxEEDXgQhkN50bp-Z2K5InM_/D3qpp0bxmJhbiZwIsCbXJ1434rc_
    restorecon /persist/wifi
    restorecon /persist/wifi/.macaddr
    write /sys/kernel/boot_adsp/boot 1

 

on early-boot
    # set RLIMIT_MEMLOCK to 64MB
    setrlimit 8 67108864 67108864

 

on boot
    #Create QMUX deamon socket area
    mkdir /dev/socket/qmux_radio 0770 radio radio
    chmod 2770 /dev/socket/qmux_radio
    mkdir /dev/socket/qmux_audio 0770 media audio
    chmod 2770 /dev/socket/qmux_audio
    mkdir /dev/socket/qmux_bluetooth 0770 bluetooth bluetooth
    chmod 2770 /dev/socket/qmux_bluetooth
    mkdir /dev/socket/qmux_gps 0770 gps gps
    chmod 2770 /dev/socket/qmux_gps

 

    # early start of rmnet_usb driver
    write /sys/module/rmnet_usb/parameters/rmnet_data_init 1

 

    # allow setting mac address
    chmod 0660 /sys/devices/platform/primaconfig/mac_address
    chown radio radio /sys/devices/platform/primaconfig/mac_address

 

    # Allow QMUX daemon to assign port open wait time
    chown radio radio /sys/devices/virtual/hsicctl/hsicctl0/modem_wait

 

    #Remove SUID bit for iproute2 ip tool
    chmod 0755 /system/bin/ip

 

    #port-bridge
    chmod 0660 /dev/smd0
    chown system system /dev/smd0

 

    #BT DUN port-bridge
    chmod 0660 /dev/smd7
    chown bluetooth bluetooth /dev/smd7

 

    chmod 0444 /sys/devices/platform/msm_hsusb/gadget/usb_state

 

    # create symlink for fb1 as HDMI
    symlink /dev/graphics/fb1 /dev/graphics/hdmi

 

    # Remove write permissions to video related nodes
    chmod 0664 /sys/devices/virtual/graphics/fb1/hpd
    chmod 0664 /sys/devices/virtual/graphics/fb1/video_mode
    chmod 0664 /sys/devices/virtual/graphics/fb1/format_3d

 

    # Change owner and group for media server and surface flinger
    chown system system /sys/devices/virtual/graphics/fb1/format_3d
    chown system system /sys/devices/virtual/graphics/fb1/hpd

 

    #For bridgemgr daemon to inform the USB driver of the correct transport
    chown radio radio /sys/class/android_usb/f_rmnet_smd_sdio/transport

 

    chmod 660 /dev/rtc0
    chown system system /dev/rtc0

 

    chown root system /proc/net/ip_conntrack

 

    # Enable DEBUG_SUSPEND, DEBUG_EXIT_SUSPEND, and DEBUG_WAKEUP
    write /sys/module/wakelock/parameters/debug_mask 7

 

    #To allow interfaces to get v6 address when tethering is enabled
    write /proc/sys/net/ipv6/conf/rmnet0/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet1/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet2/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet3/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet4/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet5/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet6/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet7/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio0/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio1/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio2/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio3/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio4/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio5/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio6/accept_ra 2
    write /proc/sys/net/ipv6/conf/rmnet_sdio7/accept_ra 2

 

# Assign TCP buffer thresholds to be ceiling value of technology maximums
# Increased technology maximums should be reflected here.
    write /proc/sys/net/core/rmem_max  1220608
    write /proc/sys/net/core/wmem_max  1220608

 

# msm specific files that need to be created on /data
on post-fs-data
    mkdir /data/media 0770 media_rw media_rw

 

    # Create the directories used by the Wireless subsystem
    mkdir /data/misc/wifi 0770 wifi wifi
    mkdir /data/misc/wifi/sockets 0770 wifi wifi
    mkdir /data/misc/wifi/wpa_supplicant 0770 wifi wifi
    mkdir /data/misc/dhcp 0770 dhcp dhcp
# to observe dnsmasq.leases file for dhcp information of soft ap.
    chown dhcp system /data/misc/dhcp

 

    mkdir /data/misc/playready
    restorecon /data/misc/playready
    mkdir /data/misc/tzapps
    restorecon /data/misc/tzapps

 

    chown system system /dev/wcnss_wlan
    write /sys/module/wcnss_ssr_8960/parameters/enable_riva_ssr 1

 

    # Create directory used by audio subsystem
    mkdir /data/misc/audio 0770 audio audio

 

    # Mounting of persist is moved to ‘on emmc-fs’ and ‘on fs’ sections
    # We chown/chmod /persist again so because mount is run as root + defaults
    chown system system /persist
    chmod 0664 /sys/devices/platform/msm_sdcc.1/polling
    chmod 0664 /sys/devices/platform/msm_sdcc.2/polling
    chmod 0664 /sys/devices/platform/msm_sdcc.3/polling
    chmod 0664 /sys/devices/platform/msm_sdcc.4/polling

 

    # Chown polling nodes as needed from UI running on system server
    chown system system /sys/devices/platform/msm_sdcc.1/polling
    chown system system /sys/devices/platform/msm_sdcc.2/polling
    chown system system /sys/devices/platform/msm_sdcc.3/polling
    chown system system /sys/devices/platform/msm_sdcc.4/polling

 

    #Create the symlink to qcn wpa_supplicant folder for ar6000 wpa_supplicant
    mkdir /data/system 0775 system system
    #symlink /data/misc/wifi/wpa_supplicant /data/system/wpa_supplicant

 

    #Create directory used by sensor subsystem(dsps)
    mkdir /data/system/sensors
    chmod 665 /data/system/sensors
    write /data/system/sensors/settings 1
    restorecon /data/system/sensors/settings
    chmod 660 /data/system/sensors/settings

 

    # AKM setting data
    mkdir /data/misc/sensors
    chmod 775 /data/misc/sensors

 

    mkdir /persist/sensors
    chmod 775 /persist/sensors

 

    #Provide the access to hostapd.conf only to root and group
    chmod 0660 /data/hostapd/hostapd.conf

 

    # Enable the setgid bit on the directory
    mkdir /data/audio 0770 media audio
    chmod 2770 /data/audio

 

    # kickstart
    mkdir /data/qcks 0770 system system
    chown system /dev/block/platform/msm_sdcc.1/by-name

 

    setprop vold.post_fs_data_done 1

 

    rm /data/local/tmp/adreno_config.txt

 

    # LED On/Off synchronization
    chown system system /sys/class/leds/red/device/lock

 

    # communicate with mpdecision and thermald
    mkdir /dev/socket/mpdecision 0770 system system
    chmod 2770 /dev/socket/mpdecision

 

    # adjust vibrator amplitude
    write /sys/class/timed_output/vibrator/amp 90

 

    # Enable Power modes and set the CPU Freq Sampling rates
    write /sys/module/rpm_resources/enable_low_power/L2_cache 1
    write /sys/module/rpm_resources/enable_low_power/pxo 1
    write /sys/module/rpm_resources/enable_low_power/vdd_dig 1
    write /sys/module/rpm_resources/enable_low_power/vdd_mem 1
    write /sys/module/pm_8x60/modes/cpu0/retention/idle_enabled 0
    write /sys/module/pm_8x60/modes/cpu1/retention/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu2/retention/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu3/retention/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu0/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu1/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu2/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu3/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu0/standalone_power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu1/standalone_power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu2/standalone_power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu3/standalone_power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu0/standalone_power_collapse/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu1/standalone_power_collapse/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu2/standalone_power_collapse/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu3/standalone_power_collapse/idle_enabled 1
    write /sys/module/pm_8x60/modes/cpu0/power_collapse/idle_enabled 1
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold 90
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate 50000
    write /sys/devices/system/cpu/cpufreq/ondemand/io_is_busy 1
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor 4
    write /sys/devices/system/cpu/cpufreq/ondemand/down_differential 10
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold_multi_core 60
    write /sys/devices/system/cpu/cpufreq/ondemand/down_differential_multi_core 3
    write /sys/devices/system/cpu/cpufreq/ondemand/optimal_freq 918000
    write /sys/devices/system/cpu/cpufreq/ondemand/sync_freq 1026000
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold_any_cpu_load 80
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu1/online 1
    write /sys/devices/system/cpu/cpu2/online 1
    write /sys/devices/system/cpu/cpu3/online 1
    write /dev/cpuctl/apps/cpu.notify_on_migrate 1

 

    # Chown cpu online files as needed for the Settings app
    chown system system /sys/devices/system/cpu/cpu1/online
    chown system system /sys/devices/system/cpu/cpu2/online
    chown system system /sys/devices/system/cpu/cpu3/online

 

    # Hardware tunables
    chown root system /sys/class/timed_output/vibrator/amp
    chown root system /sys/devices/platform/kcal_ctrl.0/kcal
    chown root system /sys/devices/platform/kcal_ctrl.0/kcal_ctrl
    chown root system /sys/devices/platform/mipi_hitachi.2049/kgamma_r
    chown root system /sys/devices/platform/mipi_hitachi.2049/kgamma_g
    chown root system /sys/devices/platform/mipi_hitachi.2049/kgamma_b
    chown root system /sys/devices/platform/mipi_hitachi.2049/kgamma_apply
    chown root system /sys/devices/platform/mipi_hitachi.2049/cabc
    chown root system /sys/devices/platform/mipi_hitachi.2049/ce
    chown root system /sys/devices/i2c-3/3-004b/disable_keys
    chmod 0664 /sys/class/timed_output/vibrator/amp
    chmod 0664 /sys/devices/platform/kcal_ctrl.0/kcal
    chmod 0664 /sys/devices/platform/kcal_ctrl.0/kcal_ctrl
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/kgamma_r
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/kgamma_g
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/kgamma_b
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/kgamma_apply
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/cabc
    chmod 0664 /sys/devices/platform/mipi_hitachi.2049/ce
    chmod 0664 /sys/devices/i2c-3/3-004b/disable_keys
    restorecon /sys/class/timed_output/vibrator/amp
    restorecon /sys/devices/platform/kcal_ctrl.0/kcal
    restorecon /sys/devices/platform/kcal_ctrl.0/kcal_ctrl
    restorecon /sys/devices/platform/mipi_hitachi.2049/kgamma_r
    restorecon /sys/devices/platform/mipi_hitachi.2049/kgamma_g
    restorecon /sys/devices/platform/mipi_hitachi.2049/kgamma_b
    restorecon /sys/devices/platform/mipi_hitachi.2049/kgamma_apply
    restorecon /sys/devices/platform/mipi_hitachi.2049/cabc
    restorecon /sys/devices/platform/mipi_hitachi.2049/ce
    restorecon /sys/devices/i2c-3/3-004b/disable_keys

 

on charger
    # Enable Power modes and set the CPU Freq Sampling rates
    write /sys/module/rpm_resources/enable_low_power/L2_cache 1
    write /sys/module/rpm_resources/enable_low_power/pxo 1
    write /sys/module/rpm_resources/enable_low_power/vdd_dig 1
    write /sys/module/rpm_resources/enable_low_power/vdd_mem 1
    write /sys/module/pm_8x60/modes/cpu0/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu1/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu2/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu3/power_collapse/suspend_enabled 1
    write /sys/module/pm_8x60/modes/cpu0/power_collapse/idle_enabled 1
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor “powersave”
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor “powersave”
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor “powersave”
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor “powersave”
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold 90
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate 50000
    write /sys/devices/system/cpu/cpufreq/ondemand/io_is_busy 1
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor 4
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq 384000
    write /sys/devices/system/cpu/cpu1/online 0
    write /sys/devices/system/cpu/cpu2/online 0
    write /sys/devices/system/cpu/cpu3/online 0

 

on property:init.svc.wpa_supplicant=stopped
    stop dhcpcd

 

service rmt_storage /system/bin/rmt_storage
    class core
    user root

 

service fm_dl /system/bin/sh /system/etc/init.aries.fm.sh
    class late_start
    user system
    group qcom_oncrpc system
    disabled
    oneshot

 

service hciattach /system/bin/sh /system/etc/init.aries.bt.sh
    class late_start
    user bluetooth
    group qcom_oncrpc bluetooth net_bt_admin system
    disabled
    oneshot

 

on property:bluetooth.hciattach=true
    start hciattach

 

on property:bluetooth.hciattach=false
    setprop bluetooth.status off

 

service bridgemgrd /system/bin/bridgemgrd
    class main
    user radio
    group radio

 

# QMUX must be in multiple groups to support external process connections
service qmuxd /system/bin/qmuxd
    class main
    user radio
    group radio audio bluetooth gps

 

service kickstart /system/bin/qcks -i /firmware/image/ -r /data/tombstones/mdm/
    class core
    user system
    group system
    oneshot

 

service netmgrd /system/bin/netmgrd
    class main

 

service sensors /system/bin/sensors.qcom
    class late_start
    user root
    group root

 

service wcnss-service /system/bin/wcnss_service
    class main
    user system
    group system wifi radio
    oneshot

 

service wpa_supplicant /system/bin/wpa_supplicant \
    -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf \
    -I/system/etc/wifi/wpa_supplicant_overlay.conf \
    -O/data/misc/wifi/sockets \
    -e/data/misc/wifi/entropy.bin -g@android:wpa_wlan0
    #   we will start as root and wpa_supplicant will switch to user wifi
    #   after setting up the capabilities required for WEXT
    #   user wifi
    #   group wifi inet keystore
    class main
    socket wpa_wlan0 dgram 660 wifi wifi
    disabled
    oneshot

 

service p2p_supplicant /system/bin/wpa_supplicant \
    -ip2p0 -Dnl80211 -c/data/misc/wifi/p2p_supplicant.conf \
    -I/system/etc/wifi/p2p_supplicant_overlay.conf -N \
    -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf \
    -I/system/etc/wifi/wpa_supplicant_overlay.conf \
    -O/data/misc/wifi/sockets -puse_p2p_group_interface=1 \
    -e/data/misc/wifi/entropy.bin -g@android:wpa_wlan0
#   we will start as root and wpa_supplicant will switch to user wifi
#   after setting up the capabilities required for WEXT
#   user wifi
#   group wifi inet keystore
    class main
    socket wpa_wlan0 dgram 660 wifi wifi
    disabled
    oneshot

 

service dhcpcd_wlan0 /system/bin/dhcpcd -aABDKL
    class main
    disabled
    oneshot

 

service dhcpcd_p2p /system/bin/dhcpcd -aABKL
    class main
    disabled
    oneshot

 

service iprenew_wlan0 /system/bin/dhcpcd -n
    class main
    disabled
    oneshot

 

service iprenew_p2p /system/bin/dhcpcd -n
    class main
    disabled
    oneshot

 

service dhcpcd_bt-pan /system/bin/dhcpcd -BKLG
    disabled
    oneshot

 

service iprenew_bt-pan /system/bin/dhcpcd -n
    disabled
    oneshot

 

on property:ro.data.large_tcp_window_size=true
    # Adjust socket buffer to enlarge TCP receive window for high bandwidth (e.g. DO-RevB)
    write /proc/sys/net/ipv4/tcp_adv_win_scale  2

 

service charger /sbin/charger_aries
    class charger

 

service fuse_sdcard0 /system/bin/sdcard -u 1023 -g 1023 /mnt/media_rw/sdcard0 /storage/sdcard0
    class late_start
    disabled

 

service fuse_usbdisk /system/bin/sdcard -u 1023 -g 1023 /mnt/media_rw/usbdisk /storage/usbdisk
    class late_start
    disabled

 

service thermald /system/bin/thermald
    class main

 

service mpdecision /system/bin/mpdecision –no_sleep –avg_comp
    class main

 

service ppd /system/bin/mm-pp-daemon
    class late_start
    user system
    socket pps stream 0660 system system graphics
    group system graphics

 

service qcamerasvr /system/bin/mm-qcamera-daemon
    class late_start
    user camera
    group camera system inet input

 

service bdAddrLoader /system/bin/bdAddrLoader -f /persist/bluetooth/.bdaddr -h -x
    class main
    user bluetooth
    group system bluetooth
    oneshot

 

# 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
    class main
    disabled
    oneshot
    keycodes 114 115 116

 

service qseecomd /system/bin/qseecomd
    class late_start
    user system
    group system

 

service diag_mdlog /system/bin/diag_mdlog -s 100
    class late_start
    disabled

 

service qrngd /system/bin/qrngd -f
    class main
    user root
    group root

 

# on property:gsm.sim.state=READY
#    start diag_mdlog

 

# CM Performance Profiles

 

# Powersave
on property:sys.perf.profile=0
    start mpdecision
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor “conservative”
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor “conservative”
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor “conservative”
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor “conservative”
    write /sys/class/kgsl/kgsl-3d0/pwrscale/trustzone/governor “ondemand”

 

# Balanced
on property:sys.perf.profile=1
    start mpdecision
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor “ondemand”
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate 50000
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold 90
    write /sys/devices/system/cpu/cpufreq/ondemand/io_is_busy 1
    write /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor 4
    write /sys/devices/system/cpu/cpufreq/ondemand/down_differential 10
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold_multi_core 70
    write /sys/devices/system/cpu/cpufreq/ondemand/down_differential_multi_core 3
    write /sys/devices/system/cpu/cpufreq/ondemand/optimal_freq 918000
    write /sys/devices/system/cpu/cpufreq/ondemand/sync_freq 1026000
    write /sys/devices/system/cpu/cpufreq/ondemand/up_threshold_any_cpu_load 80
    write /sys/class/kgsl/kgsl-3d0/pwrscale/trustzone/governor “ondemand”

 

# Performance
on property:sys.perf.profile=2
    stop mpdecision
    write /sys/devices/system/cpu/cpu0/online 1
    write /sys/devices/system/cpu/cpu1/online 1
    write /sys/devices/system/cpu/cpu2/online 1
    write /sys/devices/system/cpu/cpu3/online 1
    write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor “performance”
    write /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor “performance”
    write /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor “performance”
    write /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor “performance”
    write /sys/class/kgsl/kgsl-3d0/pwrscale/trustzone/governor “performance”