add ZramMaintenance (8d7c9fc0) · Commits · e / os / android_frameworks_base

core/res/AndroidManifest.xml

+5 −0

Original line number	Diff line number	Diff line
		@@ -8909,6 +8909,11 @@
		android:permission="android.permission.BIND_JOB_SERVICE" >
		</service>

		<service android:name="com.android.server.ZramMaintenance"
		android:exported="false"
		android:permission="android.permission.BIND_JOB_SERVICE" >
		</service>

		<service android:name="com.android.server.ZramWriteback"
		android:exported="false"
		android:permission="android.permission.BIND_JOB_SERVICE" >

services/core/Android.bp

+2 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ filegroup {
		":framework_native_aidl",
		":gsiservice_aidl",
		":installd_aidl",
		":mmd_aidl",
		":storaged_aidl",
		":vold_aidl",
		],
		@@ -242,6 +243,7 @@ java_library_static {
		"aconfig_new_storage_flags_lib",
		"powerstats_flags_lib",
		"locksettings_flags_lib",
		"mmd_flags_lib",
		],
		javac_shard_size: 50,
		javacflags: [

services/core/java/com/android/server/OWNERS

+1 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@ per-file DisplayThread.java = michaelwr@google.com, ogunwale@google.com

		# Zram writeback
		per-file ZramWriteback.java = minchan@google.com, rajekumar@google.com
		per-file ZramMaintenance.java = kawasin@google.com

		# ServiceWatcher
		per-file ServiceWatcher.java = sooniln@google.com

services/core/java/com/android/server/StorageManagerService.java

+12 −6

Original line number	Diff line number	Diff line
		@@ -41,6 +41,7 @@ import static android.os.storage.OnObbStateChangeListener.ERROR_NOT_MOUNTED;
		import static android.os.storage.OnObbStateChangeListener.ERROR_PERMISSION_DENIED;
		import static android.os.storage.OnObbStateChangeListener.MOUNTED;
		import static android.os.storage.OnObbStateChangeListener.UNMOUNTED;
		import static android.mmd.flags.Flags.mmdEnabled;

		import static com.android.internal.util.XmlUtils.readStringAttribute;
		import static com.android.internal.util.XmlUtils.writeStringAttribute;
		@@ -944,6 +945,10 @@ class StorageManagerService extends IStorageManager.Stub
		});
		refreshZramSettings();

		if (mmdEnabled()) {
		// TODO: b/375432472 - Start zram maintenance only when zram is enabled.
		ZramMaintenance.startZramMaintenance(mContext);
		} else {
		// Schedule zram writeback unless zram is disabled by persist.sys.zram_enabled
		String zramPropValue = SystemProperties.get(ZRAM_ENABLED_PROPERTY);
		if (!zramPropValue.equals("0")
		@@ -951,6 +956,7 @@ class StorageManagerService extends IStorageManager.Stub
		com.android.internal.R.bool.config_zramWriteback)) {
		ZramWriteback.scheduleZramWriteback(mContext);
		}
		}

		configureTranscoding();
		}
		@@ -976,7 +982,7 @@ class StorageManagerService extends IStorageManager.Stub
		// sole writer.
		SystemProperties.set(ZRAM_ENABLED_PROPERTY, desiredPropertyValue);
		// Schedule writeback only if zram is being enabled.
		if (desiredPropertyValue.equals("1")
		if (!mmdEnabled() && desiredPropertyValue.equals("1")
		&& mContext.getResources().getBoolean(
		com.android.internal.R.bool.config_zramWriteback)) {
		ZramWriteback.scheduleZramWriteback(mContext);

services/core/java/com/android/server/ZramMaintenance.java

0 → 100644

+118 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 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;

		import android.app.job.JobInfo;
		import android.app.job.JobParameters;
		import android.app.job.JobScheduler;
		import android.app.job.JobService;
		import android.content.ComponentName;
		import android.content.Context;
		import android.os.IBinder;
		import android.os.IMmd;
		import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.SystemProperties;
		import android.util.Slog;

		import java.time.Duration;

		/**
		* Schedules zram maintenance (e.g. zram writeback, zram recompression).
		*
		* <p>ZramMaintenance notifies mmd the good timing to execute zram maintenance based on:
		*
		* <ul>
		* <li>Enough interval has passed.
		* <li>The system is idle.
		* <li>The battery is not low.
		* </ul>
		*/
		public class ZramMaintenance extends JobService {
		private static final String TAG = ZramMaintenance.class.getName();
		// Job id must be unique across all clients of the same uid. ZramMaintenance uses the bug number
		// as the job id.
		private static final int JOB_ID = 375432472;
		private static final ComponentName sZramMaintenance =
		new ComponentName("android", ZramMaintenance.class.getName());

		private static final String FIRST_DELAY_SECONDS_PROP =
		"mm.zram.maintenance.first_delay_seconds";
		// The default is 1 hour.
		private static final long DEFAULT_FIRST_DELAY_SECONDS = 3600;
		private static final String PERIODIC_DELAY_SECONDS_PROP =
		"mm.zram.maintenance.periodic_delay_seconds";
		// The default is 1 hour.
		private static final long DEFAULT_PERIODIC_DELAY_SECONDS = 3600;
		private static final String REQUIRE_DEVICE_IDLE_PROP =
		"mm.zram.maintenance.require_device_idle";
		private static final boolean DEFAULT_REQUIRE_DEVICE_IDLE =
		true;
		private static final String REQUIRE_BATTERY_NOT_LOW_PROP =
		"mm.zram.maintenance.require_battry_not_low";
		private static final boolean DEFAULT_REQUIRE_BATTERY_NOT_LOW =
		true;

		@Override
		public boolean onStartJob(JobParameters params) {
		IBinder binder = ServiceManager.getService("mmd");
		if (binder != null) {
		IMmd mmd = IMmd.Stub.asInterface(binder);
		try {
		mmd.doZramMaintenance();
		} catch (RemoteException e) {
		Slog.e(TAG, "Failed to doZramMaintenance", e);
		}
		} else {
		Slog.w(TAG, "binder not found");
		}
		Duration delay = Duration.ofSeconds(SystemProperties.getLong(PERIODIC_DELAY_SECONDS_PROP,
		DEFAULT_PERIODIC_DELAY_SECONDS));
		scheduleZramMaintenance(this, delay);
		return true;
		}

		@Override
		public boolean onStopJob(JobParameters params) {
		return false;
		}

		/**
		* Starts periodical zram maintenance.
		*/
		public static void startZramMaintenance(Context context) {
		Duration delay = Duration.ofSeconds(
		SystemProperties.getLong(FIRST_DELAY_SECONDS_PROP, DEFAULT_FIRST_DELAY_SECONDS));
		scheduleZramMaintenance(context, delay);
		}

		private static void scheduleZramMaintenance(Context context, Duration delay) {
		JobScheduler js = context.getSystemService(JobScheduler.class);

		if (js != null) {
		js.schedule(new JobInfo.Builder(JOB_ID, sZramMaintenance)
		.setMinimumLatency(delay.toMillis())
		.setRequiresDeviceIdle(
		SystemProperties.getBoolean(REQUIRE_DEVICE_IDLE_PROP,
		DEFAULT_REQUIRE_DEVICE_IDLE))
		.setRequiresBatteryNotLow(
		SystemProperties.getBoolean(REQUIRE_BATTERY_NOT_LOW_PROP,
		DEFAULT_REQUIRE_BATTERY_NOT_LOW))
		.build());
		}
		}
		}