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Commit 7695fad9 authored by Steve Kondik's avatar Steve Kondik
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perf: Improve performance profiles 

 * Performance Profiles is going to grow into a much more powerful
   feature which can apply advanced optimizations or power saving
   techniques depending on both the state of the hardware as well
   as the current applications in use.
 * Refactor the original code and move it into PowerManager so
   that it's managed from the same place.
 * Implement "automatic performance profiles". This feature will
   automatically select a profile when specific activities are
   running. Currently this list is static and engages performance
   mode for several benchmarks (trollface).
 * Added support for a new power hint, POWER_HINT_SET_PROFILE.
   Currently, these profiles are fired using a property trigger
   in init. This is easy, but the PowerHAL can do more.
 * Moved the setting to Settings.Secure and also wrapped calls
   to the service in the DEVICE_POWER permission. Nobody should
   mess with this stuff except the system.

TODO:
 * Allow user configuration per-app.
 * Implement an advanced power-saving mode.

Change-Id: I140ebc0648c4cf05900e005923247c3180be8c93
parent 5c4db827

core/java/android/os/IPowerManager.aidl

+2 −0
Original line number Diff line number Diff line
@@ -60,4 +60,6 @@ interface IPowerManager 


    void setKeyboardLight(boolean on, int key);



	void setPowerProfile(String profile);

	String getPowerProfile();

}

core/java/android/os/PowerManager.java

+89 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
package android.os;



import android.content.Context;

import android.text.TextUtils;

import android.util.Log;



/**
@@ -290,6 +291,31 @@ public final class PowerManager { 
     */

    public static final int GO_TO_SLEEP_REASON_TIMEOUT = 2;



    /**

     * Power save profile

     * @hide

     */

    public static final String PROFILE_POWER_SAVE = "0";



    /**

     * Balanced power profile

     * @hide

     */

    public static final String PROFILE_BALANCED = "1";



    /**

     * High-performance profile

     * @hide

     */

    public static final String PROFILE_HIGH_PERFORMANCE = "2";



    /**

     * Broadcast sent when profile is changed

     * @hide

     */

    public static final String POWER_PROFILE_CHANGED =

            "com.cyanogenmod.power.PROFILE_CHANGED";



    final Context mContext;

    final IPowerManager mService;

    final Handler mHandler;
@@ -636,6 +662,69 @@ public final class PowerManager { 
        }

    }



    /**

     * True if the system supports power profiles

     *

     * @hide

     */

    public boolean hasPowerProfiles() {

        return !TextUtils.isEmpty(getDefaultPowerProfile()) &&

               !TextUtils.isEmpty(mContext.getResources().getString(

                       com.android.internal.R.string.config_perf_profile_prop));

    }



    /**

     * Gets the default power profile for the device.

     *

     * Returns null if not enabled.

     *

     * @hide

     */

    public String getDefaultPowerProfile() {

        return mContext.getResources().getString(

                com.android.internal.R.string.config_perf_profile_default_entry);

    }



    /**

     * Set the system power profile

     *

     * @throws IllegalArgumentException if invalid

     * @hide

     */

    public void setPowerProfile(String profile) {

        if (!hasPowerProfiles()) {

            throw new IllegalArgumentException("Power profiles not enabled on this system!");

        }



        try {

            if (mService != null) {

                mService.setPowerProfile(profile);

            }

        } catch (RemoteException e) {

            throw new IllegalArgumentException(e);

        }

    }



    /**

     * Gets the current power profile

     *

     * Returns null if power profiles are not enabled

     * @hide

     */

    public String getPowerProfile() {

        String ret = null;

        if (hasPowerProfiles()) {

            try {

                if (mService != null) {

                    ret = mService.getPowerProfile();

                }

            } catch (RemoteException e) {

                // nothing

            }

        }

        return ret;

    }



    /**

     * A wake lock is a mechanism to indicate that your application needs

     * to have the device stay on.

core/java/android/provider/Settings.java

+13 −7
Original line number Diff line number Diff line
@@ -3527,13 +3527,6 @@ public final class Settings { 
         */

        public static final String LOCKSCREEN_MAXIMIZE_WIDGETS = "lockscreen_maximize_widgets";



        /**

         * Performance profile

         * @see config_perf_profile_prop in frameworks/base/core/res/res/values/config.xml

         * @hide

         */

        public static final String PERFORMANCE_PROFILE = "performance_profile";



        /**

         * Whether to unlock the screen with the home key.  The value is boolean (1 or 0).

         * @hide
@@ -5720,6 +5713,19 @@ public final class Settings { 
        public static final String DEFAULT_THEME_APPLIED_ON_FIRST_BOOT =

                "default_theme_applied_on_first_boot";



        /**

         * Performance profile

         * @see config_perf_profile_prop in frameworks/base/core/res/res/values/config.xml

         * @hide

         */

        public static final String PERFORMANCE_PROFILE = "performance_profile";



        /**

         * App-based performance profile selection

         * @hide

         */

        public static final String APP_PERFORMANCE_PROFILES_ENABLED = "app_perf_profiles_enabled";



        /**

         * This are the settings to be backed up.

         *

core/res/res/values/config.xml

+7 −0
Original line number Diff line number Diff line
@@ -1513,4 +1513,11 @@ 


         The default value is false which represents AOSP behavior. -->

    <bool name="config_smsUseExpectMore">false</bool>



    <!-- Automatic power profile management per app.

         Each item should list the fully-qualified activity

         name and the power profile id, separated by a comma. -->

    <string-array name="config_auto_perf_activities" translatable="false">

    </string-array>



</resources>

core/res/res/values/symbols.xml

+3 −0
Original line number Diff line number Diff line
@@ -2005,4 +2005,7 @@ 


  <!-- Label for the Android system components when they are shown to the user. -->

  <java-symbol type="string" name="android_system_label" />



  <!-- Array of default activities with custom power management -->

  <java-symbol type="array" name="config_auto_perf_activities" />

</resources>