| /* |
| * Copyright (C) 2011 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 com.android.server.am.ActivityManagerDebugConfig.TAG_AM; |
| import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| import java.nio.ByteBuffer; |
| |
| import android.app.ActivityManager; |
| import android.app.AppProtoEnums; |
| import android.os.Build; |
| import android.os.SystemClock; |
| import com.android.internal.util.MemInfoReader; |
| import com.android.server.wm.WindowManagerService; |
| |
| import android.content.res.Resources; |
| import android.graphics.Point; |
| import android.os.SystemProperties; |
| import android.net.LocalSocketAddress; |
| import android.net.LocalSocket; |
| import android.util.Slog; |
| import android.view.Display; |
| |
| /** |
| * Activity manager code dealing with processes. |
| */ |
| public final class ProcessList { |
| private static final String TAG = TAG_WITH_CLASS_NAME ? "ProcessList" : TAG_AM; |
| |
| // The minimum time we allow between crashes, for us to consider this |
| // application to be bad and stop and its services and reject broadcasts. |
| static final int MIN_CRASH_INTERVAL = 60*1000; |
| |
| // OOM adjustments for processes in various states: |
| |
| // Uninitialized value for any major or minor adj fields |
| static final int INVALID_ADJ = -10000; |
| |
| // Adjustment used in certain places where we don't know it yet. |
| // (Generally this is something that is going to be cached, but we |
| // don't know the exact value in the cached range to assign yet.) |
| static final int UNKNOWN_ADJ = 1001; |
| |
| // This is a process only hosting activities that are not visible, |
| // so it can be killed without any disruption. |
| static final int CACHED_APP_MAX_ADJ = 906; |
| static final int CACHED_APP_MIN_ADJ = 900; |
| |
| // The B list of SERVICE_ADJ -- these are the old and decrepit |
| // services that aren't as shiny and interesting as the ones in the A list. |
| static final int SERVICE_B_ADJ = 800; |
| |
| // This is the process of the previous application that the user was in. |
| // This process is kept above other things, because it is very common to |
| // switch back to the previous app. This is important both for recent |
| // task switch (toggling between the two top recent apps) as well as normal |
| // UI flow such as clicking on a URI in the e-mail app to view in the browser, |
| // and then pressing back to return to e-mail. |
| static final int PREVIOUS_APP_ADJ = 700; |
| |
| // This is a process holding the home application -- we want to try |
| // avoiding killing it, even if it would normally be in the background, |
| // because the user interacts with it so much. |
| static final int HOME_APP_ADJ = 600; |
| |
| // This is a process holding an application service -- killing it will not |
| // have much of an impact as far as the user is concerned. |
| static final int SERVICE_ADJ = 500; |
| |
| // This is a process with a heavy-weight application. It is in the |
| // background, but we want to try to avoid killing it. Value set in |
| // system/rootdir/init.rc on startup. |
| static final int HEAVY_WEIGHT_APP_ADJ = 400; |
| |
| // This is a process currently hosting a backup operation. Killing it |
| // is not entirely fatal but is generally a bad idea. |
| static final int BACKUP_APP_ADJ = 300; |
| |
| // This is a process only hosting components that are perceptible to the |
| // user, and we really want to avoid killing them, but they are not |
| // immediately visible. An example is background music playback. |
| static final int PERCEPTIBLE_APP_ADJ = 200; |
| |
| // This is a process only hosting activities that are visible to the |
| // user, so we'd prefer they don't disappear. |
| static final int VISIBLE_APP_ADJ = 100; |
| static final int VISIBLE_APP_LAYER_MAX = PERCEPTIBLE_APP_ADJ - VISIBLE_APP_ADJ - 1; |
| |
| // This is a process that was recently TOP and moved to FGS. Continue to treat it almost |
| // like a foreground app for a while. |
| // @see TOP_TO_FGS_GRACE_PERIOD |
| static final int PERCEPTIBLE_RECENT_FOREGROUND_APP_ADJ = 50; |
| |
| // This is the process running the current foreground app. We'd really |
| // rather not kill it! |
| static final int FOREGROUND_APP_ADJ = 0; |
| |
| // This is a process that the system or a persistent process has bound to, |
| // and indicated it is important. |
| static final int PERSISTENT_SERVICE_ADJ = -700; |
| |
| // This is a system persistent process, such as telephony. Definitely |
| // don't want to kill it, but doing so is not completely fatal. |
| static final int PERSISTENT_PROC_ADJ = -800; |
| |
| // The system process runs at the default adjustment. |
| static final int SYSTEM_ADJ = -900; |
| |
| // Special code for native processes that are not being managed by the system (so |
| // don't have an oom adj assigned by the system). |
| static final int NATIVE_ADJ = -1000; |
| |
| // Memory pages are 4K. |
| static final int PAGE_SIZE = 4*1024; |
| |
| // Activity manager's version of Process.THREAD_GROUP_BG_NONINTERACTIVE |
| static final int SCHED_GROUP_BACKGROUND = 0; |
| // Activity manager's version of Process.THREAD_GROUP_RESTRICTED |
| static final int SCHED_GROUP_RESTRICTED = 1; |
| // Activity manager's version of Process.THREAD_GROUP_DEFAULT |
| static final int SCHED_GROUP_DEFAULT = 2; |
| // Activity manager's version of Process.THREAD_GROUP_TOP_APP |
| static final int SCHED_GROUP_TOP_APP = 3; |
| // Activity manager's version of Process.THREAD_GROUP_TOP_APP |
| // Disambiguate between actual top app and processes bound to the top app |
| static final int SCHED_GROUP_TOP_APP_BOUND = 4; |
| |
| // The minimum number of cached apps we want to be able to keep around, |
| // without empty apps being able to push them out of memory. |
| static final int MIN_CACHED_APPS = 2; |
| |
| // We allow empty processes to stick around for at most 30 minutes. |
| static final long MAX_EMPTY_TIME = 30*60*1000; |
| |
| // Threshold of number of cached+empty where we consider memory critical. |
| static final int TRIM_CRITICAL_THRESHOLD = 3; |
| |
| // Threshold of number of cached+empty where we consider memory critical. |
| static final int TRIM_LOW_THRESHOLD = 5; |
| |
| // Low Memory Killer Daemon command codes. |
| // These must be kept in sync with the definitions in lmkd.c |
| // |
| // LMK_TARGET <minfree> <minkillprio> ... (up to 6 pairs) |
| // LMK_PROCPRIO <pid> <uid> <prio> |
| // LMK_PROCREMOVE <pid> |
| // LMK_PROCPURGE |
| static final byte LMK_TARGET = 0; |
| static final byte LMK_PROCPRIO = 1; |
| static final byte LMK_PROCREMOVE = 2; |
| static final byte LMK_PROCPURGE = 3; |
| |
| // These are the various interesting memory levels that we will give to |
| // the OOM killer. Note that the OOM killer only supports 6 slots, so we |
| // can't give it a different value for every possible kind of process. |
| private final int[] mOomAdj = new int[] { |
| FOREGROUND_APP_ADJ, VISIBLE_APP_ADJ, PERCEPTIBLE_APP_ADJ, |
| BACKUP_APP_ADJ, CACHED_APP_MIN_ADJ, CACHED_APP_MAX_ADJ |
| }; |
| // These are the low-end OOM level limits. This is appropriate for an |
| // HVGA or smaller phone with less than 512MB. Values are in KB. |
| private final int[] mOomMinFreeLow = new int[] { |
| 12288, 18432, 24576, |
| 36864, 43008, 49152 |
| }; |
| // These are the high-end OOM level limits. This is appropriate for a |
| // 1280x800 or larger screen with around 1GB RAM. Values are in KB. |
| private final int[] mOomMinFreeHigh = new int[] { |
| 73728, 92160, 110592, |
| 129024, 147456, 184320 |
| }; |
| // The actual OOM killer memory levels we are using. |
| private final int[] mOomMinFree = new int[mOomAdj.length]; |
| |
| private final long mTotalMemMb; |
| |
| private long mCachedRestoreLevel; |
| |
| private boolean mHaveDisplaySize; |
| |
| private static LocalSocket sLmkdSocket; |
| private static OutputStream sLmkdOutputStream; |
| |
| ProcessList() { |
| MemInfoReader minfo = new MemInfoReader(); |
| minfo.readMemInfo(); |
| mTotalMemMb = minfo.getTotalSize()/(1024*1024); |
| updateOomLevels(0, 0, false); |
| } |
| |
| void applyDisplaySize(WindowManagerService wm) { |
| if (!mHaveDisplaySize) { |
| Point p = new Point(); |
| // TODO(multi-display): Compute based on sum of all connected displays' resolutions. |
| wm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, p); |
| if (p.x != 0 && p.y != 0) { |
| updateOomLevels(p.x, p.y, true); |
| mHaveDisplaySize = true; |
| } |
| } |
| } |
| |
| private void updateOomLevels(int displayWidth, int displayHeight, boolean write) { |
| // Scale buckets from avail memory: at 300MB we use the lowest values to |
| // 700MB or more for the top values. |
| float scaleMem = ((float)(mTotalMemMb-350))/(700-350); |
| |
| // Scale buckets from screen size. |
| int minSize = 480*800; // 384000 |
| int maxSize = 1280*800; // 1024000 230400 870400 .264 |
| float scaleDisp = ((float)(displayWidth*displayHeight)-minSize)/(maxSize-minSize); |
| if (false) { |
| Slog.i("XXXXXX", "scaleMem=" + scaleMem); |
| Slog.i("XXXXXX", "scaleDisp=" + scaleDisp + " dw=" + displayWidth |
| + " dh=" + displayHeight); |
| } |
| |
| float scale = scaleMem > scaleDisp ? scaleMem : scaleDisp; |
| if (scale < 0) scale = 0; |
| else if (scale > 1) scale = 1; |
| int minfree_adj = Resources.getSystem().getInteger( |
| com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAdjust); |
| int minfree_abs = Resources.getSystem().getInteger( |
| com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAbsolute); |
| if (false) { |
| Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs); |
| } |
| |
| final boolean is64bit = Build.SUPPORTED_64_BIT_ABIS.length > 0; |
| |
| for (int i=0; i<mOomAdj.length; i++) { |
| int low = mOomMinFreeLow[i]; |
| int high = mOomMinFreeHigh[i]; |
| if (is64bit) { |
| // Increase the high min-free levels for cached processes for 64-bit |
| if (i == 4) high = (high*3)/2; |
| else if (i == 5) high = (high*7)/4; |
| } |
| mOomMinFree[i] = (int)(low + ((high-low)*scale)); |
| } |
| |
| if (minfree_abs >= 0) { |
| for (int i=0; i<mOomAdj.length; i++) { |
| mOomMinFree[i] = (int)((float)minfree_abs * mOomMinFree[i] |
| / mOomMinFree[mOomAdj.length - 1]); |
| } |
| } |
| |
| if (minfree_adj != 0) { |
| for (int i=0; i<mOomAdj.length; i++) { |
| mOomMinFree[i] += (int)((float)minfree_adj * mOomMinFree[i] |
| / mOomMinFree[mOomAdj.length - 1]); |
| if (mOomMinFree[i] < 0) { |
| mOomMinFree[i] = 0; |
| } |
| } |
| } |
| |
| // The maximum size we will restore a process from cached to background, when under |
| // memory duress, is 1/3 the size we have reserved for kernel caches and other overhead |
| // before killing background processes. |
| mCachedRestoreLevel = (getMemLevel(ProcessList.CACHED_APP_MAX_ADJ)/1024) / 3; |
| |
| // Ask the kernel to try to keep enough memory free to allocate 3 full |
| // screen 32bpp buffers without entering direct reclaim. |
| int reserve = displayWidth * displayHeight * 4 * 3 / 1024; |
| int reserve_adj = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAdjust); |
| int reserve_abs = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAbsolute); |
| |
| if (reserve_abs >= 0) { |
| reserve = reserve_abs; |
| } |
| |
| if (reserve_adj != 0) { |
| reserve += reserve_adj; |
| if (reserve < 0) { |
| reserve = 0; |
| } |
| } |
| |
| if (write) { |
| ByteBuffer buf = ByteBuffer.allocate(4 * (2*mOomAdj.length + 1)); |
| buf.putInt(LMK_TARGET); |
| for (int i=0; i<mOomAdj.length; i++) { |
| buf.putInt((mOomMinFree[i]*1024)/PAGE_SIZE); |
| buf.putInt(mOomAdj[i]); |
| } |
| |
| writeLmkd(buf); |
| SystemProperties.set("sys.sysctl.extra_free_kbytes", Integer.toString(reserve)); |
| } |
| // GB: 2048,3072,4096,6144,7168,8192 |
| // HC: 8192,10240,12288,14336,16384,20480 |
| } |
| |
| public static int computeEmptyProcessLimit(int totalProcessLimit) { |
| return totalProcessLimit/2; |
| } |
| |
| private static String buildOomTag(String prefix, String space, int val, int base) { |
| if (val == base) { |
| if (space == null) return prefix; |
| return prefix + " "; |
| } |
| return prefix + "+" + Integer.toString(val-base); |
| } |
| |
| public static String makeOomAdjString(int setAdj) { |
| if (setAdj >= ProcessList.CACHED_APP_MIN_ADJ) { |
| return buildOomTag("cch", " ", setAdj, ProcessList.CACHED_APP_MIN_ADJ); |
| } else if (setAdj >= ProcessList.SERVICE_B_ADJ) { |
| return buildOomTag("svcb ", null, setAdj, ProcessList.SERVICE_B_ADJ); |
| } else if (setAdj >= ProcessList.PREVIOUS_APP_ADJ) { |
| return buildOomTag("prev ", null, setAdj, ProcessList.PREVIOUS_APP_ADJ); |
| } else if (setAdj >= ProcessList.HOME_APP_ADJ) { |
| return buildOomTag("home ", null, setAdj, ProcessList.HOME_APP_ADJ); |
| } else if (setAdj >= ProcessList.SERVICE_ADJ) { |
| return buildOomTag("svc ", null, setAdj, ProcessList.SERVICE_ADJ); |
| } else if (setAdj >= ProcessList.HEAVY_WEIGHT_APP_ADJ) { |
| return buildOomTag("hvy ", null, setAdj, ProcessList.HEAVY_WEIGHT_APP_ADJ); |
| } else if (setAdj >= ProcessList.BACKUP_APP_ADJ) { |
| return buildOomTag("bkup ", null, setAdj, ProcessList.BACKUP_APP_ADJ); |
| } else if (setAdj >= ProcessList.PERCEPTIBLE_APP_ADJ) { |
| return buildOomTag("prcp ", null, setAdj, ProcessList.PERCEPTIBLE_APP_ADJ); |
| } else if (setAdj >= ProcessList.VISIBLE_APP_ADJ) { |
| return buildOomTag("vis ", null, setAdj, ProcessList.VISIBLE_APP_ADJ); |
| } else if (setAdj >= ProcessList.FOREGROUND_APP_ADJ) { |
| return buildOomTag("fore ", null, setAdj, ProcessList.FOREGROUND_APP_ADJ); |
| } else if (setAdj >= ProcessList.PERSISTENT_SERVICE_ADJ) { |
| return buildOomTag("psvc ", null, setAdj, ProcessList.PERSISTENT_SERVICE_ADJ); |
| } else if (setAdj >= ProcessList.PERSISTENT_PROC_ADJ) { |
| return buildOomTag("pers ", null, setAdj, ProcessList.PERSISTENT_PROC_ADJ); |
| } else if (setAdj >= ProcessList.SYSTEM_ADJ) { |
| return buildOomTag("sys ", null, setAdj, ProcessList.SYSTEM_ADJ); |
| } else if (setAdj >= ProcessList.NATIVE_ADJ) { |
| return buildOomTag("ntv ", null, setAdj, ProcessList.NATIVE_ADJ); |
| } else { |
| return Integer.toString(setAdj); |
| } |
| } |
| |
| public static String makeProcStateString(int curProcState) { |
| String procState; |
| switch (curProcState) { |
| case ActivityManager.PROCESS_STATE_PERSISTENT: |
| procState = "PER "; |
| break; |
| case ActivityManager.PROCESS_STATE_PERSISTENT_UI: |
| procState = "PERU"; |
| break; |
| case ActivityManager.PROCESS_STATE_TOP: |
| procState = "TOP "; |
| break; |
| case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE: |
| procState = "FGS "; |
| break; |
| case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE: |
| procState = "BFGS"; |
| break; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: |
| procState = "IMPF"; |
| break; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: |
| procState = "IMPB"; |
| break; |
| case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND: |
| procState = "TRNB"; |
| break; |
| case ActivityManager.PROCESS_STATE_BACKUP: |
| procState = "BKUP"; |
| break; |
| case ActivityManager.PROCESS_STATE_SERVICE: |
| procState = "SVC "; |
| break; |
| case ActivityManager.PROCESS_STATE_RECEIVER: |
| procState = "RCVR"; |
| break; |
| case ActivityManager.PROCESS_STATE_TOP_SLEEPING: |
| procState = "TPSL"; |
| break; |
| case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: |
| procState = "HVY "; |
| break; |
| case ActivityManager.PROCESS_STATE_HOME: |
| procState = "HOME"; |
| break; |
| case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: |
| procState = "LAST"; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: |
| procState = "CAC "; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: |
| procState = "CACC"; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_RECENT: |
| procState = "CRE "; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_EMPTY: |
| procState = "CEM "; |
| break; |
| case ActivityManager.PROCESS_STATE_NONEXISTENT: |
| procState = "NONE"; |
| break; |
| default: |
| procState = "??"; |
| break; |
| } |
| return procState; |
| } |
| |
| public static int makeProcStateProtoEnum(int curProcState) { |
| switch (curProcState) { |
| case ActivityManager.PROCESS_STATE_PERSISTENT: |
| return AppProtoEnums.PROCESS_STATE_PERSISTENT; |
| case ActivityManager.PROCESS_STATE_PERSISTENT_UI: |
| return AppProtoEnums.PROCESS_STATE_PERSISTENT_UI; |
| case ActivityManager.PROCESS_STATE_TOP: |
| return AppProtoEnums.PROCESS_STATE_TOP; |
| case ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE: |
| return AppProtoEnums.PROCESS_STATE_BOUND_FOREGROUND_SERVICE; |
| case ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE: |
| return AppProtoEnums.PROCESS_STATE_FOREGROUND_SERVICE; |
| case ActivityManager.PROCESS_STATE_TOP_SLEEPING: |
| return AppProtoEnums.PROCESS_STATE_TOP_SLEEPING; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: |
| return AppProtoEnums.PROCESS_STATE_IMPORTANT_FOREGROUND; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: |
| return AppProtoEnums.PROCESS_STATE_IMPORTANT_BACKGROUND; |
| case ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND: |
| return AppProtoEnums.PROCESS_STATE_TRANSIENT_BACKGROUND; |
| case ActivityManager.PROCESS_STATE_BACKUP: |
| return AppProtoEnums.PROCESS_STATE_BACKUP; |
| case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: |
| return AppProtoEnums.PROCESS_STATE_HEAVY_WEIGHT; |
| case ActivityManager.PROCESS_STATE_SERVICE: |
| return AppProtoEnums.PROCESS_STATE_SERVICE; |
| case ActivityManager.PROCESS_STATE_RECEIVER: |
| return AppProtoEnums.PROCESS_STATE_RECEIVER; |
| case ActivityManager.PROCESS_STATE_HOME: |
| return AppProtoEnums.PROCESS_STATE_HOME; |
| case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: |
| return AppProtoEnums.PROCESS_STATE_LAST_ACTIVITY; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: |
| return AppProtoEnums.PROCESS_STATE_CACHED_ACTIVITY; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: |
| return AppProtoEnums.PROCESS_STATE_CACHED_ACTIVITY_CLIENT; |
| case ActivityManager.PROCESS_STATE_CACHED_RECENT: |
| return AppProtoEnums.PROCESS_STATE_CACHED_RECENT; |
| case ActivityManager.PROCESS_STATE_CACHED_EMPTY: |
| return AppProtoEnums.PROCESS_STATE_CACHED_EMPTY; |
| case ActivityManager.PROCESS_STATE_NONEXISTENT: |
| return AppProtoEnums.PROCESS_STATE_NONEXISTENT; |
| case ActivityManager.PROCESS_STATE_UNKNOWN: |
| return AppProtoEnums.PROCESS_STATE_UNKNOWN; |
| default: |
| return AppProtoEnums.PROCESS_STATE_UNKNOWN_TO_PROTO; |
| } |
| } |
| |
| public static void appendRamKb(StringBuilder sb, long ramKb) { |
| for (int j=0, fact=10; j<6; j++, fact*=10) { |
| if (ramKb < fact) { |
| sb.append(' '); |
| } |
| } |
| sb.append(ramKb); |
| } |
| |
| // How long after a state change that it is safe to collect PSS without it being dirty. |
| public static final int PSS_SAFE_TIME_FROM_STATE_CHANGE = 1000; |
| |
| // The minimum time interval after a state change it is safe to collect PSS. |
| public static final int PSS_MIN_TIME_FROM_STATE_CHANGE = 15*1000; |
| |
| // The maximum amount of time we want to go between PSS collections. |
| public static final int PSS_MAX_INTERVAL = 60*60*1000; |
| |
| // The minimum amount of time between successive PSS requests for *all* processes. |
| public static final int PSS_ALL_INTERVAL = 20*60*1000; |
| |
| // The amount of time until PSS when a persistent process first appears. |
| private static final int PSS_FIRST_PERSISTENT_INTERVAL = 30*1000; |
| |
| // The amount of time until PSS when a process first becomes top. |
| private static final int PSS_FIRST_TOP_INTERVAL = 10*1000; |
| |
| // The amount of time until PSS when a process first goes into the background. |
| private static final int PSS_FIRST_BACKGROUND_INTERVAL = 20*1000; |
| |
| // The amount of time until PSS when a process first becomes cached. |
| private static final int PSS_FIRST_CACHED_INTERVAL = 20*1000; |
| |
| // The amount of time until PSS when an important process stays in the same state. |
| private static final int PSS_SAME_PERSISTENT_INTERVAL = 10*60*1000; |
| |
| // The amount of time until PSS when the top process stays in the same state. |
| private static final int PSS_SAME_TOP_INTERVAL = 1*60*1000; |
| |
| // The amount of time until PSS when an important process stays in the same state. |
| private static final int PSS_SAME_IMPORTANT_INTERVAL = 10*60*1000; |
| |
| // The amount of time until PSS when a service process stays in the same state. |
| private static final int PSS_SAME_SERVICE_INTERVAL = 5*60*1000; |
| |
| // The amount of time until PSS when a cached process stays in the same state. |
| private static final int PSS_SAME_CACHED_INTERVAL = 10*60*1000; |
| |
| // The amount of time until PSS when a persistent process first appears. |
| private static final int PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL = 1*60*1000; |
| |
| // The amount of time until PSS when a process first becomes top. |
| private static final int PSS_FIRST_ASLEEP_TOP_INTERVAL = 20*1000; |
| |
| // The amount of time until PSS when a process first goes into the background. |
| private static final int PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL = 30*1000; |
| |
| // The amount of time until PSS when a process first becomes cached. |
| private static final int PSS_FIRST_ASLEEP_CACHED_INTERVAL = 1*60*1000; |
| |
| // The minimum time interval after a state change it is safe to collect PSS. |
| public static final int PSS_TEST_MIN_TIME_FROM_STATE_CHANGE = 10*1000; |
| |
| // The amount of time during testing until PSS when a process first becomes top. |
| private static final int PSS_TEST_FIRST_TOP_INTERVAL = 3*1000; |
| |
| // The amount of time during testing until PSS when a process first goes into the background. |
| private static final int PSS_TEST_FIRST_BACKGROUND_INTERVAL = 5*1000; |
| |
| // The amount of time during testing until PSS when an important process stays in same state. |
| private static final int PSS_TEST_SAME_IMPORTANT_INTERVAL = 10*1000; |
| |
| // The amount of time during testing until PSS when a background process stays in same state. |
| private static final int PSS_TEST_SAME_BACKGROUND_INTERVAL = 15*1000; |
| |
| public static final int PROC_MEM_PERSISTENT = 0; |
| public static final int PROC_MEM_TOP = 1; |
| public static final int PROC_MEM_IMPORTANT = 2; |
| public static final int PROC_MEM_SERVICE = 3; |
| public static final int PROC_MEM_CACHED = 4; |
| public static final int PROC_MEM_NUM = 5; |
| |
| // Map large set of system process states to |
| private static final int[] sProcStateToProcMem = new int[] { |
| PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT |
| PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_FOREGROUND_SERVICE |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BOUND_FOREGROUND_SERVICE |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_TRANSIENT_BACKGROUND |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BACKUP |
| PROC_MEM_SERVICE, // ActivityManager.PROCESS_STATE_SERVICE |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_RECEIVER |
| PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP_SLEEPING |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_HOME |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_RECENT |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| }; |
| |
| private static final long[] sFirstAwakePssTimes = new long[] { |
| PSS_FIRST_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_FIRST_TOP_INTERVAL, // PROC_MEM_TOP |
| PSS_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE |
| PSS_FIRST_CACHED_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| private static final long[] sSameAwakePssTimes = new long[] { |
| PSS_SAME_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_SAME_TOP_INTERVAL, // PROC_MEM_TOP |
| PSS_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_SAME_SERVICE_INTERVAL, // PROC_MEM_SERVICE |
| PSS_SAME_CACHED_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| private static final long[] sFirstAsleepPssTimes = new long[] { |
| PSS_FIRST_ASLEEP_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_FIRST_ASLEEP_TOP_INTERVAL, // PROC_MEM_TOP |
| PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_FIRST_ASLEEP_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE |
| PSS_FIRST_ASLEEP_CACHED_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| private static final long[] sSameAsleepPssTimes = new long[] { |
| PSS_SAME_PERSISTENT_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_SAME_TOP_INTERVAL, // PROC_MEM_TOP |
| PSS_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_SAME_SERVICE_INTERVAL, // PROC_MEM_SERVICE |
| PSS_SAME_CACHED_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| private static final long[] sTestFirstPssTimes = new long[] { |
| PSS_TEST_FIRST_TOP_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_TEST_FIRST_TOP_INTERVAL, // PROC_MEM_TOP |
| PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE |
| PSS_TEST_FIRST_BACKGROUND_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| private static final long[] sTestSamePssTimes = new long[] { |
| PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_PERSISTENT |
| PSS_TEST_SAME_IMPORTANT_INTERVAL, // PROC_MEM_TOP |
| PSS_TEST_SAME_IMPORTANT_INTERVAL, // PROC_MEM_IMPORTANT |
| PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_SERVICE |
| PSS_TEST_SAME_BACKGROUND_INTERVAL, // PROC_MEM_CACHED |
| }; |
| |
| public static final class ProcStateMemTracker { |
| final int[] mHighestMem = new int[PROC_MEM_NUM]; |
| final float[] mScalingFactor = new float[PROC_MEM_NUM]; |
| int mTotalHighestMem = PROC_MEM_CACHED; |
| |
| int mPendingMemState; |
| int mPendingHighestMemState; |
| float mPendingScalingFactor; |
| |
| public ProcStateMemTracker() { |
| for (int i = PROC_MEM_PERSISTENT; i < PROC_MEM_NUM; i++) { |
| mHighestMem[i] = PROC_MEM_NUM; |
| mScalingFactor[i] = 1.0f; |
| } |
| mPendingMemState = -1; |
| } |
| |
| public void dumpLine(PrintWriter pw) { |
| pw.print("best="); |
| pw.print(mTotalHighestMem); |
| pw.print(" ("); |
| boolean needSep = false; |
| for (int i = 0; i < PROC_MEM_NUM; i++) { |
| if (mHighestMem[i] < PROC_MEM_NUM) { |
| if (needSep) { |
| pw.print(", "); |
| needSep = false; |
| } |
| pw.print(i); |
| pw.print("="); |
| pw.print(mHighestMem[i]); |
| pw.print(" "); |
| pw.print(mScalingFactor[i]); |
| pw.print("x"); |
| needSep = true; |
| } |
| } |
| pw.print(")"); |
| if (mPendingMemState >= 0) { |
| pw.print(" / pending state="); |
| pw.print(mPendingMemState); |
| pw.print(" highest="); |
| pw.print(mPendingHighestMemState); |
| pw.print(" "); |
| pw.print(mPendingScalingFactor); |
| pw.print("x"); |
| } |
| pw.println(); |
| } |
| } |
| |
| public static boolean procStatesDifferForMem(int procState1, int procState2) { |
| return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2]; |
| } |
| |
| public static long minTimeFromStateChange(boolean test) { |
| return test ? PSS_TEST_MIN_TIME_FROM_STATE_CHANGE : PSS_MIN_TIME_FROM_STATE_CHANGE; |
| } |
| |
| public static void commitNextPssTime(ProcStateMemTracker tracker) { |
| if (tracker.mPendingMemState >= 0) { |
| tracker.mHighestMem[tracker.mPendingMemState] = tracker.mPendingHighestMemState; |
| tracker.mScalingFactor[tracker.mPendingMemState] = tracker.mPendingScalingFactor; |
| tracker.mTotalHighestMem = tracker.mPendingHighestMemState; |
| tracker.mPendingMemState = -1; |
| } |
| } |
| |
| public static void abortNextPssTime(ProcStateMemTracker tracker) { |
| tracker.mPendingMemState = -1; |
| } |
| |
| public static long computeNextPssTime(int procState, ProcStateMemTracker tracker, boolean test, |
| boolean sleeping, long now) { |
| boolean first; |
| float scalingFactor; |
| final int memState = sProcStateToProcMem[procState]; |
| if (tracker != null) { |
| final int highestMemState = memState < tracker.mTotalHighestMem |
| ? memState : tracker.mTotalHighestMem; |
| first = highestMemState < tracker.mHighestMem[memState]; |
| tracker.mPendingMemState = memState; |
| tracker.mPendingHighestMemState = highestMemState; |
| if (first) { |
| tracker.mPendingScalingFactor = scalingFactor = 1.0f; |
| } else { |
| scalingFactor = tracker.mScalingFactor[memState]; |
| tracker.mPendingScalingFactor = scalingFactor * 1.5f; |
| } |
| } else { |
| first = true; |
| scalingFactor = 1.0f; |
| } |
| final long[] table = test |
| ? (first |
| ? sTestFirstPssTimes |
| : sTestSamePssTimes) |
| : (first |
| ? (sleeping ? sFirstAsleepPssTimes : sFirstAwakePssTimes) |
| : (sleeping ? sSameAsleepPssTimes : sSameAwakePssTimes)); |
| long delay = (long)(table[memState] * scalingFactor); |
| if (delay > PSS_MAX_INTERVAL) { |
| delay = PSS_MAX_INTERVAL; |
| } |
| return now + delay; |
| } |
| |
| long getMemLevel(int adjustment) { |
| for (int i=0; i<mOomAdj.length; i++) { |
| if (adjustment <= mOomAdj[i]) { |
| return mOomMinFree[i] * 1024; |
| } |
| } |
| return mOomMinFree[mOomAdj.length-1] * 1024; |
| } |
| |
| /** |
| * Return the maximum pss size in kb that we consider a process acceptable to |
| * restore from its cached state for running in the background when RAM is low. |
| */ |
| long getCachedRestoreThresholdKb() { |
| return mCachedRestoreLevel; |
| } |
| |
| /** |
| * Set the out-of-memory badness adjustment for a process. |
| * If {@code pid <= 0}, this method will be a no-op. |
| * |
| * @param pid The process identifier to set. |
| * @param uid The uid of the app |
| * @param amt Adjustment value -- lmkd allows -16 to +15. |
| * |
| * {@hide} |
| */ |
| public static final void setOomAdj(int pid, int uid, int amt) { |
| // This indicates that the process is not started yet and so no need to proceed further. |
| if (pid <= 0) { |
| return; |
| } |
| if (amt == UNKNOWN_ADJ) |
| return; |
| |
| long start = SystemClock.elapsedRealtime(); |
| ByteBuffer buf = ByteBuffer.allocate(4 * 4); |
| buf.putInt(LMK_PROCPRIO); |
| buf.putInt(pid); |
| buf.putInt(uid); |
| buf.putInt(amt); |
| writeLmkd(buf); |
| long now = SystemClock.elapsedRealtime(); |
| if ((now-start) > 250) { |
| Slog.w("ActivityManager", "SLOW OOM ADJ: " + (now-start) + "ms for pid " + pid |
| + " = " + amt); |
| } |
| } |
| |
| /* |
| * {@hide} |
| */ |
| public static final void remove(int pid) { |
| // This indicates that the process is not started yet and so no need to proceed further. |
| if (pid <= 0) { |
| return; |
| } |
| ByteBuffer buf = ByteBuffer.allocate(4 * 2); |
| buf.putInt(LMK_PROCREMOVE); |
| buf.putInt(pid); |
| writeLmkd(buf); |
| } |
| |
| private static boolean openLmkdSocket() { |
| try { |
| sLmkdSocket = new LocalSocket(LocalSocket.SOCKET_SEQPACKET); |
| sLmkdSocket.connect( |
| new LocalSocketAddress("lmkd", |
| LocalSocketAddress.Namespace.RESERVED)); |
| sLmkdOutputStream = sLmkdSocket.getOutputStream(); |
| } catch (IOException ex) { |
| Slog.w(TAG, "lowmemorykiller daemon socket open failed"); |
| sLmkdSocket = null; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // Never call directly, use writeLmkd() instead |
| private static boolean writeLmkdCommand(ByteBuffer buf) { |
| try { |
| sLmkdOutputStream.write(buf.array(), 0, buf.position()); |
| } catch (IOException ex) { |
| Slog.w(TAG, "Error writing to lowmemorykiller socket"); |
| |
| try { |
| sLmkdSocket.close(); |
| } catch (IOException ex2) { |
| } |
| |
| sLmkdSocket = null; |
| return false; |
| } |
| return true; |
| } |
| |
| private static void writeLmkd(ByteBuffer buf) { |
| |
| for (int i = 0; i < 3; i++) { |
| if (sLmkdSocket == null) { |
| if (openLmkdSocket() == false) { |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException ie) { |
| } |
| continue; |
| } |
| |
| // Purge any previously registered pids |
| ByteBuffer purge_buf = ByteBuffer.allocate(4); |
| purge_buf.putInt(LMK_PROCPURGE); |
| if (writeLmkdCommand(purge_buf) == false) { |
| // Write failed, skip the rest and retry |
| continue; |
| } |
| } |
| if (writeLmkdCommand(buf)) { |
| return; |
| } |
| } |
| } |
| } |