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Commit 44433250 authored by Kalesh Singh's avatar Kalesh Singh
Browse files

AMS: Add Phenotype key for low swap threshold 



KEY_LOW_SWAP_THRESHOLD_PERCENT controls the minimum percentage
of free swap imposed by proactive kills.

Bug: 259307176
Bug: 249601646
Test: adb shell device_config put activity_manager low_swap_threshold_percent 0.50
Test: adb shell device_config get activity_manager low_swap_threshold_percent
Merged-In: Ieadd31efc677b43ce008a3b26726b565e9f497ab
Change-Id: Ieadd31efc677b43ce008a3b26726b565e9f497ab
Signed-off-by: default avatarKalesh Singh <kaleshsingh@google.com>
parent cb832469

services/core/java/com/android/server/am/ActivityManagerConstants.java

+22 −0
Original line number Diff line number Diff line
@@ -250,6 +250,13 @@ final class ActivityManagerConstants extends ContentObserver { 
     */

    private static final String KEY_PROACTIVE_KILLS_ENABLED = "proactive_kills_enabled";



    /**

      * Trim LRU cached app when swap falls below this minimum percentage.

      *

      * Depends on KEY_PROACTIVE_KILLS_ENABLED

      */

    private static final String KEY_LOW_SWAP_THRESHOLD_PERCENT = "low_swap_threshold_percent";



    /**

     * Default value for mFlagBackgroundActivityStartsEnabled if not explicitly set in

     * Settings.Global. This allows it to be set experimentally unless it has been
@@ -840,6 +847,8 @@ final class ActivityManagerConstants extends ContentObserver { 


    private static final boolean DEFAULT_PROACTIVE_KILLS_ENABLED = false;



    private static final float DEFAULT_LOW_SWAP_THRESHOLD_PERCENT = 0.10f;



    private static final String KEY_MIN_ASSOC_LOG_DURATION = "min_assoc_log_duration";



    public static long MIN_ASSOC_LOG_DURATION = DEFAULT_MIN_ASSOC_LOG_DURATION;
@@ -871,6 +880,7 @@ final class ActivityManagerConstants extends ContentObserver { 
    public static int BINDER_HEAVY_HITTER_AUTO_SAMPLER_BATCHSIZE;

    public static float BINDER_HEAVY_HITTER_AUTO_SAMPLER_THRESHOLD;

    public static boolean PROACTIVE_KILLS_ENABLED = DEFAULT_PROACTIVE_KILLS_ENABLED;

    public static float LOW_SWAP_THRESHOLD_PERCENT = DEFAULT_LOW_SWAP_THRESHOLD_PERCENT;



    private final OnPropertiesChangedListener mOnDeviceConfigChangedListener =

            new OnPropertiesChangedListener() {
@@ -1001,6 +1011,9 @@ final class ActivityManagerConstants extends ContentObserver { 
                            case KEY_PROACTIVE_KILLS_ENABLED:

                                updateProactiveKillsEnabled();

                                break;

                            case KEY_LOW_SWAP_THRESHOLD_PERCENT:

                                updateLowSwapThresholdPercent();

                                break;

                            default:

                                break;

                        }
@@ -1610,6 +1623,13 @@ final class ActivityManagerConstants extends ContentObserver { 
                DEFAULT_PROACTIVE_KILLS_ENABLED);

    }



    private void updateLowSwapThresholdPercent() {

        LOW_SWAP_THRESHOLD_PERCENT = DeviceConfig.getFloat(

                DeviceConfig.NAMESPACE_ACTIVITY_MANAGER,

                KEY_LOW_SWAP_THRESHOLD_PERCENT,

                DEFAULT_LOW_SWAP_THRESHOLD_PERCENT);

    }



    private void updateMinAssocLogDuration() {

        MIN_ASSOC_LOG_DURATION = DeviceConfig.getLong(

                DeviceConfig.NAMESPACE_ACTIVITY_MANAGER, KEY_MIN_ASSOC_LOG_DURATION,
@@ -1799,6 +1819,8 @@ final class ActivityManagerConstants extends ContentObserver { 
        pw.print("="); pw.println(mNetworkAccessTimeoutMs);

        pw.print("  "); pw.print(KEY_PROACTIVE_KILLS_ENABLED);

        pw.print("="); pw.println(PROACTIVE_KILLS_ENABLED);

        pw.print("  "); pw.print(KEY_LOW_SWAP_THRESHOLD_PERCENT);

        pw.print("="); pw.println(LOW_SWAP_THRESHOLD_PERCENT);



        pw.println();

        if (mOverrideMaxCachedProcesses >= 0) {

services/core/java/com/android/server/am/OomAdjuster.java

+1 −1
Original line number Diff line number Diff line
@@ -1065,7 +1065,7 @@ public class OomAdjuster { 
        int numTrimming = 0;



        boolean proactiveKillsEnabled = mConstants.PROACTIVE_KILLS_ENABLED;

        double lowSwapThresholdPercent = 0.10;  // TODO: Configure from phenotype

        double lowSwapThresholdPercent = mConstants.LOW_SWAP_THRESHOLD_PERCENT;

        double freeSwapPercent =  proactiveKillsEnabled ? getFreeSwapPercent() : 1.00;

        ProcessRecord lruCachedApp = null;