Add initial Scribe code. (d149ab8b) · Commits · e / os / android_frameworks_base

apex/jobscheduler/service/java/com/android/server/tare/InternalResourceService.java

+10 −8

Original line number	Diff line number	Diff line
		@@ -83,6 +83,8 @@ public class InternalResourceService extends SystemService {
		static final long UNUSED_RECLAMATION_PERIOD_MS = 24 * HOUR_IN_MILLIS;
		/** How much of an app's unused wealth should be reclaimed periodically. */
		private static final float DEFAULT_UNUSED_RECLAMATION_PERCENTAGE = .1f;
		/** The amount of time to delay reclamation by after boot. */
		private static final long RECLAMATION_STARTUP_DELAY_MS = 30_000L;
		private static final int PACKAGE_QUERY_FLAGS =
		PackageManager.MATCH_DIRECT_BOOT_AWARE \| PackageManager.MATCH_DIRECT_BOOT_UNAWARE
		\| PackageManager.MATCH_APEX;
		@@ -99,6 +101,7 @@ public class InternalResourceService extends SystemService {
		private final CompleteEconomicPolicy mCompleteEconomicPolicy;
		private final ConfigObserver mConfigObserver;
		private final EconomyManagerStub mEconomyManagerStub;
		private final Scribe mScribe;

		@NonNull
		@GuardedBy("mLock")
		@@ -117,9 +120,6 @@ public class InternalResourceService extends SystemService {
		// In the range [0,100] to represent 0% to 100% battery.
		@GuardedBy("mLock")
		private int mCurrentBatteryLevel;
		// TODO: load from disk
		@GuardedBy("mLock")
		private long mLastUnusedReclamationTime;

		private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
		@Nullable
		@@ -187,7 +187,7 @@ public class InternalResourceService extends SystemService {
		public void onAlarm() {
		synchronized (mLock) {
		mAgent.reclaimUnusedAssetsLocked(DEFAULT_UNUSED_RECLAMATION_PERCENTAGE);
		mLastUnusedReclamationTime = getCurrentTimeMillis();
		mScribe.setLastReclamationTimeLocked(getCurrentTimeMillis());
		scheduleUnusedWealthReclamationLocked();
		}
		}
		@@ -216,6 +216,7 @@ public class InternalResourceService extends SystemService {
		mPackageManager = context.getPackageManager();
		mPackageManagerInternal = LocalServices.getService(PackageManagerInternal.class);
		mEconomyManagerStub = new EconomyManagerStub();
		mScribe = new Scribe(this);
		mCompleteEconomicPolicy = new CompleteEconomicPolicy(this);
		mAgent = new Agent(this, mCompleteEconomicPolicy);

		@@ -451,8 +452,8 @@ public class InternalResourceService extends SystemService {
		@GuardedBy("mLock")
		private void scheduleUnusedWealthReclamationLocked() {
		final long now = getCurrentTimeMillis();
		final long nextReclamationTime =
		Math.max(mLastUnusedReclamationTime + UNUSED_RECLAMATION_PERIOD_MS, now + 30_000);
		final long nextReclamationTime = Math.max(now + RECLAMATION_STARTUP_DELAY_MS,
		mScribe.getLastReclamationTimeLocked() + UNUSED_RECLAMATION_PERIOD_MS);
		mHandler.post(() -> {
		// Never call out to AlarmManager with the lock held. This sits below AM.
		AlarmManager alarmManager = getContext().getSystemService(AlarmManager.class);
		@@ -463,7 +464,7 @@ public class InternalResourceService extends SystemService {
		ALARM_TAG_WEALTH_RECLAMATION, mUnusedWealthReclamationListener, mHandler);
		} else {
		mHandler.sendEmptyMessageDelayed(
		MSG_SCHEDULE_UNUSED_WEALTH_RECLAMATION_EVENT, 30_000);
		MSG_SCHEDULE_UNUSED_WEALTH_RECLAMATION_EVENT, RECLAMATION_STARTUP_DELAY_MS);
		}
		});
		}
		@@ -531,6 +532,7 @@ public class InternalResourceService extends SystemService {
		if (isFirstSetup) {
		mAgent.grantBirthrightsLocked();
		}
		scheduleUnusedWealthReclamationLocked();
		}
		}

		@@ -542,7 +544,6 @@ public class InternalResourceService extends SystemService {
		registerListeners();
		mCurrentBatteryLevel = getCurrentBatteryLevel();
		mHandler.post(this::setupHeavyWork);
		scheduleUnusedWealthReclamationLocked();
		mCompleteEconomicPolicy.setup();
		}
		}
		@@ -562,6 +563,7 @@ public class InternalResourceService extends SystemService {
		}
		});
		mPkgCache.clear();
		mScribe.tearDownLocked();
		mUidToPackageCache.clear();
		getContext().unregisterReceiver(mBroadcastReceiver);
		UsageStatsManagerInternal usmi =

apex/jobscheduler/service/java/com/android/server/tare/Scribe.java

0 → 100644

+54 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 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.
		*/

		package com.android.server.tare;

		import android.util.Log;

		import com.android.internal.annotations.GuardedBy;

		/**
		* Maintains the current TARE state and handles writing it to disk and reading it back from disk.
		*/
		public class Scribe {
		private static final String TAG = "TARE-" + Scribe.class.getSimpleName();
		private static final boolean DEBUG = InternalResourceService.DEBUG
		\|\| Log.isLoggable(TAG, Log.DEBUG);

		private final InternalResourceService mIrs;

		@GuardedBy("mIrs.mLock")
		private long mLastReclamationTime;

		Scribe(InternalResourceService irs) {
		mIrs = irs;
		}

		@GuardedBy("mIrs.mLock")
		long getLastReclamationTimeLocked() {
		return mLastReclamationTime;
		}

		@GuardedBy("InternalResourceService.mLock")
		void setLastReclamationTimeLocked(long time) {
		mLastReclamationTime = time;
		}

		@GuardedBy("mIrs.mLock")
		void tearDownLocked() {
		mLastReclamationTime = 0;
		}
		}