贵阳网站微信建设公司,河南做网站公司汉狮,网站建设定制开发网站设计开发,网站seo多少钱Android system实战 — Android R 进程保活白名单0. 前言1. 具体实现1.1 准备工作1.2 源码实现1.2.1 源码1.2.2 diff文件0. 前言 最近在Android R上实现一些需求#xff0c;进行记录一下#xff0c;关于进程保活的基础知识可以参考Android system — 进程生命周期与ADJ#…
Android system实战 — Android R 进程保活白名单0. 前言1. 具体实现1.1 准备工作1.2 源码实现1.2.1 源码1.2.2 diff文件0. 前言 最近在Android R上实现一些需求进行记录一下关于进程保活的基础知识可以参考Android system — 进程生命周期与ADJ实际上本质上就是在提高进程的adj等级从而达到保活的效果当然如果你不care原理也可以直接看下面具体实现。
1. 具体实现 主要涉及源码路径
platform/frameworks/base/services/core/java/com/android/server/am/OomAdjuster.java1.1 准备工作
在源码实现之前我们需要先准备进程白名单并将其编译至system/etc/app_oom_adj.txt
白名单格式如下 通用格式 -序号整数,包名 其中序号值越小则意味着对应的包名进程越受到保护越难被系统回收内存 该功能设置后查看是否生效可以通过查看进程的adj值来确认 ps -A | grep “进程名” cat /proc/进程名对应PID/oom_score_adj 例如
1.2 源码实现
platform/frameworks/base/services/core/java/com/android/server/am/OomAdjuster.java
1.2.1 源码
/** Copyright (C) 2019 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.am;import static android.app.ActivityManager.PROCESS_CAPABILITY_ALL;
import static android.app.ActivityManager.PROCESS_CAPABILITY_ALL_IMPLICIT;
import static android.app.ActivityManager.PROCESS_CAPABILITY_FOREGROUND_CAMERA;
import static android.app.ActivityManager.PROCESS_CAPABILITY_FOREGROUND_LOCATION;
import static android.app.ActivityManager.PROCESS_CAPABILITY_FOREGROUND_MICROPHONE;
import static android.app.ActivityManager.PROCESS_CAPABILITY_NONE;
import static android.app.ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE;
import static android.app.ActivityManager.PROCESS_STATE_BOUND_TOP;
import static android.app.ActivityManager.PROCESS_STATE_CACHED_ACTIVITY;
import static android.app.ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT;
import static android.app.ActivityManager.PROCESS_STATE_CACHED_EMPTY;
import static android.app.ActivityManager.PROCESS_STATE_CACHED_RECENT;
import static android.app.ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE;
import static android.app.ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND;
import static android.app.ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND;
import static android.app.ActivityManager.PROCESS_STATE_LAST_ACTIVITY;
import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
import static android.app.ActivityManager.PROCESS_STATE_PERSISTENT;
import static android.app.ActivityManager.PROCESS_STATE_PERSISTENT_UI;
import static android.app.ActivityManager.PROCESS_STATE_SERVICE;
import static android.app.ActivityManager.PROCESS_STATE_TOP;
import static android.app.ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND;
import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA;
import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION;
import static android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE;
import static android.os.Process.SCHED_OTHER;
import static android.os.Process.THREAD_GROUP_BACKGROUND;
import static android.os.Process.THREAD_GROUP_DEFAULT;
import static android.os.Process.THREAD_GROUP_RESTRICTED;
import static android.os.Process.THREAD_GROUP_TOP_APP;
import static android.os.Process.THREAD_PRIORITY_DISPLAY;
import static android.os.Process.setProcessGroup;
import static android.os.Process.setThreadPriority;
import static android.os.Process.setThreadScheduler;import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ALL;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_BACKUP;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_LRU;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_OOM_ADJ;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_OOM_ADJ_REASON;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PROCESS_OBSERVERS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_PSS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_UID_OBSERVERS;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_USAGE_STATS;
import static com.android.server.am.ActivityManagerService.DISPATCH_OOM_ADJ_OBSERVER_MSG;
import static com.android.server.am.ActivityManagerService.IDLE_UIDS_MSG;
import static com.android.server.am.ActivityManagerService.TAG_BACKUP;
import static com.android.server.am.ActivityManagerService.TAG_LRU;
import static com.android.server.am.ActivityManagerService.TAG_OOM_ADJ;
import static com.android.server.am.ActivityManagerService.TAG_PROCESS_OBSERVERS;
import static com.android.server.am.ActivityManagerService.TAG_PSS;
import static com.android.server.am.ActivityManagerService.TAG_UID_OBSERVERS;
import static com.android.server.am.ActivityManagerService.TOP_APP_PRIORITY_BOOST;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_SWITCH;import android.app.ActivityManager;
import android.app.ApplicationExitInfo;
import android.app.usage.UsageEvents;
import android.compat.annotation.ChangeId;
import android.compat.annotation.EnabledAfter;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ServiceInfo;
import android.os.Debug;
import android.os.Handler;
import android.os.IBinder;
import android.os.PowerManagerInternal;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.Trace;
import android.os.UserHandle;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Slog;
import android.util.proto.ProtoOutputStream;import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.procstats.ProcessStats;
import com.android.internal.compat.IPlatformCompat;
import com.android.server.LocalServices;
import com.android.server.ServiceThread;
import com.android.server.wm.ActivityServiceConnectionsHolder;
import com.android.server.wm.WindowProcessController;import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Vector;import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.IOException;/*** All of the code required to compute proc states and oom_adj values.*/
public final class OomAdjuster {private static final String TAG OomAdjuster;static final String OOM_ADJ_REASON_METHOD updateOomAdj;static final String OOM_ADJ_REASON_NONE OOM_ADJ_REASON_METHOD _meh;static final String OOM_ADJ_REASON_ACTIVITY OOM_ADJ_REASON_METHOD _activityChange;static final String OOM_ADJ_REASON_FINISH_RECEIVER OOM_ADJ_REASON_METHOD _finishReceiver;......Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);}return true;});mTmpUidRecords new ActiveUids(service, false);mTmpQueue new ArrayDequeProcessRecord(mConstants.CUR_MAX_CACHED_PROCESSES 1);mNumSlots ((ProcessList.CACHED_APP_MAX_ADJ - ProcessList.CACHED_APP_MIN_ADJ 1) 1)/ ProcessList.CACHED_APP_IMPORTANCE_LEVELS;IBinder b ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE);mPlatformCompat IPlatformCompat.Stub.asInterface(b);//for specific process priority guardparseCustomsizedAppOomAdj(/system/etc/app_oom_adj.txt);}void initSettings() {mCachedAppOptimizer.init();if (mService.mConstants.KEEP_WARMING_SERVICES.size() 0) {final IntentFilter filter new IntentFilter(Intent.ACTION_USER_SWITCHED);mService.mContext.registerReceiverForAllUsers(new BroadcastReceiver() {Overridepublic void onReceive(Context context, Intent intent) {synchronized (mService) {....../** Inform the oomadj observer of changes to oomadj. Used by tests. */GuardedBy(mService)void reportOomAdjMessageLocked(String tag, String msg) {Slog.d(tag, msg);if (mService.mCurOomAdjObserver ! null) {mService.mUiHandler.obtainMessage(DISPATCH_OOM_ADJ_OBSERVER_MSG, msg).sendToTarget();}}private class AppOomAdj {public int m_nOomAdj;public String m_sAppName;public AppOomAdj(int adj, String appname) {this.m_nOomAdj adj;this.m_sAppName appname;}}private VectorAppOomAdj mVec null;private void parseCustomsizedAppOomAdj(String file) {try {FileReader fr new FileReader(file);BufferedReader brnew BufferedReader(fr);String line ;String[] arrsnull;AppOomAdj obj null;if (mVec null) {mVec new VectorAppOomAdj();}while ((linebr.readLine()) ! null) {arrsline.split(,);obj new AppOomAdj(Integer.parseInt(arrs[0]), arrs[1]);mVec.add(obj);}br.close();fr.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}/** Applies the computed oomadj, procstate and sched group values and freezes them in set* */GuardedBy(mService)private final boolean applyOomAdjLocked(ProcessRecord app, boolean doingAll, long now,long nowElapsed) {boolean success true;if (app.getCurRawAdj() ! app.setRawAdj) {app.setRawAdj app.getCurRawAdj();}int changes 0;//Slog.d(TAG, applyOomAdjLocked pkg: app.processName,pid: app.pid,uid: app.uid ,curAdj:app.curAdj,setAdj:app.setAdj);if (mVec ! null) {int i 0;int oom_score_adj 0;for (;i mVec.size(); i) {if (app.processName.equals(mVec.get(i).m_sAppName)) {//new curAdj point to {oom_score_adj}oom_score_adj mVec.get(i).m_nOomAdj;app.curAdj oom_score_adj;//Slog.d(TAG, applyOomAdjLocked pkg:app.processName mVec app.curAdj:app.curAdj);}}}// dont compact during bootupif (mCachedAppOptimizer.useCompaction() mService.mBooted) {// Cached and prev/home compactionif (app.curAdj ! app.setAdj) {// Perform a minor compaction when a perceptible app becomes the prev/home app// Perform a major compaction when any app enters cached// reminder: here, setAdj is previous state, curAdj is upcoming stateif (app.setAdj ProcessList.PERCEPTIBLE_APP_ADJ (app.curAdj ProcessList.PREVIOUS_APP_ADJ ||......}1.2.2 diff文件
From 4a534042738f6793827ab51089bbdd0977b489ad Mon Sep 17 00:00:00 2001
From: yuefu.zhou yuefu.zhouamlogic.com
Date: Fri, 03 Feb 2023 18:32:13 0800
Subject: [PATCH] AMS: Support for configuring process priority. [2/2]PD#IPTV-19626Problem:
need support configure the process priority.Solution:
Support for configuring process priority.Verify:
S928XChange-Id: If5f82e86f2a33a8cfbdf664d6079a9ad904fc4ac
Signed-off-by: yuefu.zhou yuefu.zhouamlogic.com
---diff --git a/services/core/java/com/android/server/am/OomAdjuster.java b/services/core/java/com/android/server/am/OomAdjuster.java
index faa7dce..2d0ce94 100644
--- a/services/core/java/com/android/server/am/OomAdjuster.javab/services/core/java/com/android/server/am/OomAdjuster.java-110,6 110,12 import java.util.ArrayDeque;import java.util.ArrayList;import java.util.Arrays;
import java.util.Vector;import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.IOException;/*** All of the code required to compute proc states and oom_adj values.-265,6 271,9 / ProcessList.CACHED_APP_IMPORTANCE_LEVELS;IBinder b ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE);mPlatformCompat IPlatformCompat.Stub.asInterface(b);//for specific process priority guardparseCustomsizedAppOomAdj(/system/etc/app_oom_adj.txt);}void initSettings() {-2144,6 2153,43 }} private class AppOomAdj {public int m_nOomAdj;public String m_sAppName;public AppOomAdj(int adj, String appname) {this.m_nOomAdj adj;this.m_sAppName appname;}}private VectorAppOomAdj mVec null;private void parseCustomsizedAppOomAdj(String file) {try {FileReader fr new FileReader(file);BufferedReader brnew BufferedReader(fr);String line ;String[] arrsnull;AppOomAdj obj null;if (mVec null) {mVec new VectorAppOomAdj();}while ((linebr.readLine()) ! null) {arrsline.split(,);obj new AppOomAdj(Integer.parseInt(arrs[0]), arrs[1]);mVec.add(obj);}br.close();fr.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
/** Applies the computed oomadj, procstate and sched group values and freezes them in set* */GuardedBy(mService)private final boolean applyOomAdjLocked(ProcessRecord app, boolean doingAll, long now,-2155,6 2201,19 }int changes 0;//Slog.d(TAG, applyOomAdjLocked pkg: app.processName,pid: app.pid,uid: app.uid ,curAdj:app.curAdj,setAdj:app.setAdj);if (mVec ! null) {int i 0;int oom_score_adj 0;for (;i mVec.size(); i) {if (app.processName.equals(mVec.get(i).m_sAppName)) {//new curAdj point to {oom_score_adj}oom_score_adj mVec.get(i).m_nOomAdj;app.curAdj oom_score_adj;//Slog.d(TAG, applyOomAdjLocked pkg:app.processName mVec app.curAdj:app.curAdj);}}}// dont compact during bootupif (mCachedAppOptimizer.useCompaction() mService.mBooted) {
