Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.am; |
| 18 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 19 | import java.io.IOException; |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 20 | import java.io.OutputStream; |
| 21 | import java.nio.ByteBuffer; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 22 | |
Dianne Hackborn | 8e69257 | 2013-09-10 19:06:15 -0700 | [diff] [blame] | 23 | import android.app.ActivityManager; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 24 | import com.android.internal.util.MemInfoReader; |
| 25 | import com.android.server.wm.WindowManagerService; |
| 26 | |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 27 | import android.content.res.Resources; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 28 | import android.graphics.Point; |
Colin Cross | 59d80a5 | 2013-07-25 10:45:05 -0700 | [diff] [blame] | 29 | import android.os.SystemProperties; |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 30 | import android.net.LocalSocketAddress; |
| 31 | import android.net.LocalSocket; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 32 | import android.util.Slog; |
Craig Mautner | 59c0097 | 2012-07-30 12:10:24 -0700 | [diff] [blame] | 33 | import android.view.Display; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 34 | |
| 35 | /** |
| 36 | * Activity manager code dealing with processes. |
| 37 | */ |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 38 | final class ProcessList { |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 39 | // The minimum time we allow between crashes, for us to consider this |
| 40 | // application to be bad and stop and its services and reject broadcasts. |
| 41 | static final int MIN_CRASH_INTERVAL = 60*1000; |
| 42 | |
| 43 | // OOM adjustments for processes in various states: |
| 44 | |
Dianne Hackborn | c823051 | 2013-07-13 21:32:12 -0700 | [diff] [blame] | 45 | // Adjustment used in certain places where we don't know it yet. |
| 46 | // (Generally this is something that is going to be cached, but we |
| 47 | // don't know the exact value in the cached range to assign yet.) |
| 48 | static final int UNKNOWN_ADJ = 16; |
| 49 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 50 | // This is a process only hosting activities that are not visible, |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 51 | // so it can be killed without any disruption. |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 52 | static final int CACHED_APP_MAX_ADJ = 15; |
Dianne Hackborn | 20cdcee | 2013-07-10 18:47:04 -0700 | [diff] [blame] | 53 | static final int CACHED_APP_MIN_ADJ = 9; |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 54 | |
| 55 | // The B list of SERVICE_ADJ -- these are the old and decrepit |
| 56 | // services that aren't as shiny and interesting as the ones in the A list. |
Dianne Hackborn | f35fe23 | 2011-11-01 19:25:20 -0700 | [diff] [blame] | 57 | static final int SERVICE_B_ADJ = 8; |
| 58 | |
| 59 | // This is the process of the previous application that the user was in. |
| 60 | // This process is kept above other things, because it is very common to |
| 61 | // switch back to the previous app. This is important both for recent |
| 62 | // task switch (toggling between the two top recent apps) as well as normal |
| 63 | // UI flow such as clicking on a URI in the e-mail app to view in the browser, |
| 64 | // and then pressing back to return to e-mail. |
| 65 | static final int PREVIOUS_APP_ADJ = 7; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 66 | |
| 67 | // This is a process holding the home application -- we want to try |
| 68 | // avoiding killing it, even if it would normally be in the background, |
| 69 | // because the user interacts with it so much. |
| 70 | static final int HOME_APP_ADJ = 6; |
| 71 | |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 72 | // This is a process holding an application service -- killing it will not |
| 73 | // have much of an impact as far as the user is concerned. |
| 74 | static final int SERVICE_ADJ = 5; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 75 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 76 | // This is a process with a heavy-weight application. It is in the |
| 77 | // background, but we want to try to avoid killing it. Value set in |
| 78 | // system/rootdir/init.rc on startup. |
Dianne Hackborn | c823051 | 2013-07-13 21:32:12 -0700 | [diff] [blame] | 79 | static final int HEAVY_WEIGHT_APP_ADJ = 4; |
| 80 | |
| 81 | // This is a process currently hosting a backup operation. Killing it |
| 82 | // is not entirely fatal but is generally a bad idea. |
| 83 | static final int BACKUP_APP_ADJ = 3; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 84 | |
| 85 | // This is a process only hosting components that are perceptible to the |
| 86 | // user, and we really want to avoid killing them, but they are not |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 87 | // immediately visible. An example is background music playback. |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 88 | static final int PERCEPTIBLE_APP_ADJ = 2; |
| 89 | |
| 90 | // This is a process only hosting activities that are visible to the |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 91 | // user, so we'd prefer they don't disappear. |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 92 | static final int VISIBLE_APP_ADJ = 1; |
| 93 | |
| 94 | // This is the process running the current foreground app. We'd really |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 95 | // rather not kill it! |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 96 | static final int FOREGROUND_APP_ADJ = 0; |
| 97 | |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 98 | // This is a system persistent process, such as telephony. Definitely |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 99 | // don't want to kill it, but doing so is not completely fatal. |
Dianne Hackborn | e02c88a | 2011-10-28 13:58:15 -0700 | [diff] [blame] | 100 | static final int PERSISTENT_PROC_ADJ = -12; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 101 | |
| 102 | // The system process runs at the default adjustment. |
| 103 | static final int SYSTEM_ADJ = -16; |
| 104 | |
Dianne Hackborn | 8e69257 | 2013-09-10 19:06:15 -0700 | [diff] [blame] | 105 | // Special code for native processes that are not being managed by the system (so |
| 106 | // don't have an oom adj assigned by the system). |
| 107 | static final int NATIVE_ADJ = -17; |
| 108 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 109 | // Memory pages are 4K. |
| 110 | static final int PAGE_SIZE = 4*1024; |
| 111 | |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 112 | // The minimum number of cached apps we want to be able to keep around, |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 113 | // without empty apps being able to push them out of memory. |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 114 | static final int MIN_CACHED_APPS = 2; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 115 | |
Dianne Hackborn | 2286cdc | 2013-07-01 19:10:06 -0700 | [diff] [blame] | 116 | // The maximum number of cached processes we will keep around before killing them. |
| 117 | // NOTE: this constant is *only* a control to not let us go too crazy with |
| 118 | // keeping around processes on devices with large amounts of RAM. For devices that |
| 119 | // are tighter on RAM, the out of memory killer is responsible for killing background |
| 120 | // processes as RAM is needed, and we should *never* be relying on this limit to |
| 121 | // kill them. Also note that this limit only applies to cached background processes; |
| 122 | // we have no limit on the number of service, visible, foreground, or other such |
| 123 | // processes and the number of those processes does not count against the cached |
| 124 | // process limit. |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 125 | static final int MAX_CACHED_APPS = 24; |
Dianne Hackborn | b12e135 | 2012-09-26 11:39:20 -0700 | [diff] [blame] | 126 | |
| 127 | // We allow empty processes to stick around for at most 30 minutes. |
| 128 | static final long MAX_EMPTY_TIME = 30*60*1000; |
| 129 | |
Dianne Hackborn | 2286cdc | 2013-07-01 19:10:06 -0700 | [diff] [blame] | 130 | // The maximum number of empty app processes we will let sit around. |
| 131 | private static final int MAX_EMPTY_APPS = computeEmptyProcessLimit(MAX_CACHED_APPS); |
Dianne Hackborn | b12e135 | 2012-09-26 11:39:20 -0700 | [diff] [blame] | 132 | |
| 133 | // The number of empty apps at which we don't consider it necessary to do |
| 134 | // memory trimming. |
Dianne Hackborn | 2286cdc | 2013-07-01 19:10:06 -0700 | [diff] [blame] | 135 | static final int TRIM_EMPTY_APPS = MAX_EMPTY_APPS/2; |
| 136 | |
| 137 | // The number of cached at which we don't consider it necessary to do |
| 138 | // memory trimming. |
Dianne Hackborn | 2610b7c | 2013-09-20 18:45:43 -0700 | [diff] [blame] | 139 | static final int TRIM_CACHED_APPS = ((MAX_CACHED_APPS-MAX_EMPTY_APPS)*2)/3; |
Dianne Hackborn | b12e135 | 2012-09-26 11:39:20 -0700 | [diff] [blame] | 140 | |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 141 | // Threshold of number of cached+empty where we consider memory critical. |
Dianne Hackborn | b12e135 | 2012-09-26 11:39:20 -0700 | [diff] [blame] | 142 | static final int TRIM_CRITICAL_THRESHOLD = 3; |
| 143 | |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 144 | // Threshold of number of cached+empty where we consider memory critical. |
Dianne Hackborn | b12e135 | 2012-09-26 11:39:20 -0700 | [diff] [blame] | 145 | static final int TRIM_LOW_THRESHOLD = 5; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 146 | |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 147 | // Low Memory Killer Daemon command codes. |
| 148 | // These must be kept in sync with the definitions in lmkd.c |
| 149 | // |
| 150 | // LMK_TARGET <minfree> <minkillprio> ... (up to 6 pairs) |
| 151 | // LMK_PROCPRIO <pid> <prio> |
| 152 | // LMK_PROCREMOVE <pid> |
| 153 | static final byte LMK_TARGET = 0; |
| 154 | static final byte LMK_PROCPRIO = 1; |
| 155 | static final byte LMK_PROCREMOVE = 2; |
| 156 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 157 | // These are the various interesting memory levels that we will give to |
| 158 | // the OOM killer. Note that the OOM killer only supports 6 slots, so we |
| 159 | // can't give it a different value for every possible kind of process. |
| 160 | private final int[] mOomAdj = new int[] { |
| 161 | FOREGROUND_APP_ADJ, VISIBLE_APP_ADJ, PERCEPTIBLE_APP_ADJ, |
Dianne Hackborn | be4e6aa | 2013-06-07 13:25:29 -0700 | [diff] [blame] | 162 | BACKUP_APP_ADJ, CACHED_APP_MIN_ADJ, CACHED_APP_MAX_ADJ |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 163 | }; |
| 164 | // These are the low-end OOM level limits. This is appropriate for an |
| 165 | // HVGA or smaller phone with less than 512MB. Values are in KB. |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 166 | private final int[] mOomMinFreeLow = new int[] { |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 167 | 8192, 12288, 16384, |
| 168 | 24576, 28672, 32768 |
| 169 | }; |
| 170 | // These are the high-end OOM level limits. This is appropriate for a |
| 171 | // 1280x800 or larger screen with around 1GB RAM. Values are in KB. |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 172 | private final int[] mOomMinFreeHigh = new int[] { |
Ben Cheng | b5cda42 | 2013-03-27 17:36:13 -0700 | [diff] [blame] | 173 | 49152, 61440, 73728, |
| 174 | 86016, 98304, 122880 |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 175 | }; |
| 176 | // The actual OOM killer memory levels we are using. |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 177 | private final int[] mOomMinFree = new int[mOomAdj.length]; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 178 | |
| 179 | private final long mTotalMemMb; |
| 180 | |
Dianne Hackborn | 3bc8f78d | 2013-09-19 13:34:35 -0700 | [diff] [blame] | 181 | private long mCachedRestoreLevel; |
| 182 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 183 | private boolean mHaveDisplaySize; |
| 184 | |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 185 | private static LocalSocket sLmkdSocket; |
| 186 | private static OutputStream sLmkdOutputStream; |
| 187 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 188 | ProcessList() { |
| 189 | MemInfoReader minfo = new MemInfoReader(); |
| 190 | minfo.readMemInfo(); |
| 191 | mTotalMemMb = minfo.getTotalSize()/(1024*1024); |
| 192 | updateOomLevels(0, 0, false); |
| 193 | } |
| 194 | |
| 195 | void applyDisplaySize(WindowManagerService wm) { |
| 196 | if (!mHaveDisplaySize) { |
| 197 | Point p = new Point(); |
Colin Cross | 637dbfc | 2013-07-18 17:15:15 -0700 | [diff] [blame] | 198 | wm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, p); |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 199 | if (p.x != 0 && p.y != 0) { |
| 200 | updateOomLevels(p.x, p.y, true); |
| 201 | mHaveDisplaySize = true; |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | private void updateOomLevels(int displayWidth, int displayHeight, boolean write) { |
| 207 | // Scale buckets from avail memory: at 300MB we use the lowest values to |
| 208 | // 700MB or more for the top values. |
| 209 | float scaleMem = ((float)(mTotalMemMb-300))/(700-300); |
| 210 | |
| 211 | // Scale buckets from screen size. |
Dianne Hackborn | 635a6d5 | 2013-07-29 17:15:38 -0700 | [diff] [blame] | 212 | int minSize = 480*800; // 384000 |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 213 | int maxSize = 1280*800; // 1024000 230400 870400 .264 |
| 214 | float scaleDisp = ((float)(displayWidth*displayHeight)-minSize)/(maxSize-minSize); |
Dianne Hackborn | 635a6d5 | 2013-07-29 17:15:38 -0700 | [diff] [blame] | 215 | if (false) { |
| 216 | Slog.i("XXXXXX", "scaleMem=" + scaleMem); |
| 217 | Slog.i("XXXXXX", "scaleDisp=" + scaleDisp + " dw=" + displayWidth |
| 218 | + " dh=" + displayHeight); |
| 219 | } |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 220 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 221 | float scale = scaleMem > scaleDisp ? scaleMem : scaleDisp; |
| 222 | if (scale < 0) scale = 0; |
| 223 | else if (scale > 1) scale = 1; |
Dianne Hackborn | 635a6d5 | 2013-07-29 17:15:38 -0700 | [diff] [blame] | 224 | int minfree_adj = Resources.getSystem().getInteger( |
| 225 | com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAdjust); |
| 226 | int minfree_abs = Resources.getSystem().getInteger( |
| 227 | com.android.internal.R.integer.config_lowMemoryKillerMinFreeKbytesAbsolute); |
| 228 | if (false) { |
| 229 | Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs); |
| 230 | } |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 231 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 232 | for (int i=0; i<mOomAdj.length; i++) { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 233 | int low = mOomMinFreeLow[i]; |
| 234 | int high = mOomMinFreeHigh[i]; |
| 235 | mOomMinFree[i] = (int)(low + ((high-low)*scale)); |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 236 | } |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 237 | |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 238 | if (minfree_abs >= 0) { |
| 239 | for (int i=0; i<mOomAdj.length; i++) { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 240 | mOomMinFree[i] = (int)((float)minfree_abs * mOomMinFree[i] / mOomMinFree[mOomAdj.length - 1]); |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 241 | } |
| 242 | } |
| 243 | |
| 244 | if (minfree_adj != 0) { |
| 245 | for (int i=0; i<mOomAdj.length; i++) { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 246 | mOomMinFree[i] += (int)((float)minfree_adj * mOomMinFree[i] / mOomMinFree[mOomAdj.length - 1]); |
Colin Cross | fcdad6f | 2013-07-25 15:04:40 -0700 | [diff] [blame] | 247 | if (mOomMinFree[i] < 0) { |
| 248 | mOomMinFree[i] = 0; |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | |
Dianne Hackborn | 3bc8f78d | 2013-09-19 13:34:35 -0700 | [diff] [blame] | 253 | // The maximum size we will restore a process from cached to background, when under |
| 254 | // memory duress, is 1/3 the size we have reserved for kernel caches and other overhead |
| 255 | // before killing background processes. |
| 256 | mCachedRestoreLevel = (getMemLevel(ProcessList.CACHED_APP_MAX_ADJ)/1024) / 3; |
| 257 | |
Colin Cross | 59d80a5 | 2013-07-25 10:45:05 -0700 | [diff] [blame] | 258 | // Ask the kernel to try to keep enough memory free to allocate 3 full |
| 259 | // screen 32bpp buffers without entering direct reclaim. |
| 260 | int reserve = displayWidth * displayHeight * 4 * 3 / 1024; |
| 261 | int reserve_adj = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAdjust); |
| 262 | int reserve_abs = Resources.getSystem().getInteger(com.android.internal.R.integer.config_extraFreeKbytesAbsolute); |
| 263 | |
| 264 | if (reserve_abs >= 0) { |
| 265 | reserve = reserve_abs; |
| 266 | } |
| 267 | |
| 268 | if (reserve_adj != 0) { |
| 269 | reserve += reserve_adj; |
| 270 | if (reserve < 0) { |
| 271 | reserve = 0; |
| 272 | } |
| 273 | } |
| 274 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 275 | if (write) { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 276 | ByteBuffer buf = ByteBuffer.allocate(4 * (2*mOomAdj.length + 1)); |
| 277 | buf.putInt(LMK_TARGET); |
| 278 | for (int i=0; i<mOomAdj.length; i++) { |
| 279 | buf.putInt((mOomMinFree[i]*1024)/PAGE_SIZE); |
| 280 | buf.putInt(mOomAdj[i]); |
| 281 | } |
| 282 | |
| 283 | writeLmkd(buf); |
Colin Cross | 59d80a5 | 2013-07-25 10:45:05 -0700 | [diff] [blame] | 284 | SystemProperties.set("sys.sysctl.extra_free_kbytes", Integer.toString(reserve)); |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 285 | } |
| 286 | // GB: 2048,3072,4096,6144,7168,8192 |
| 287 | // HC: 8192,10240,12288,14336,16384,20480 |
| 288 | } |
| 289 | |
Dianne Hackborn | 2286cdc | 2013-07-01 19:10:06 -0700 | [diff] [blame] | 290 | public static int computeEmptyProcessLimit(int totalProcessLimit) { |
| 291 | return (totalProcessLimit*2)/3; |
| 292 | } |
| 293 | |
Dianne Hackborn | 8e69257 | 2013-09-10 19:06:15 -0700 | [diff] [blame] | 294 | private static String buildOomTag(String prefix, String space, int val, int base) { |
| 295 | if (val == base) { |
| 296 | if (space == null) return prefix; |
| 297 | return prefix + " "; |
| 298 | } |
| 299 | return prefix + "+" + Integer.toString(val-base); |
| 300 | } |
| 301 | |
| 302 | public static String makeOomAdjString(int setAdj) { |
| 303 | if (setAdj >= ProcessList.CACHED_APP_MIN_ADJ) { |
| 304 | return buildOomTag("cch", " ", setAdj, ProcessList.CACHED_APP_MIN_ADJ); |
| 305 | } else if (setAdj >= ProcessList.SERVICE_B_ADJ) { |
| 306 | return buildOomTag("svcb ", null, setAdj, ProcessList.SERVICE_B_ADJ); |
| 307 | } else if (setAdj >= ProcessList.PREVIOUS_APP_ADJ) { |
| 308 | return buildOomTag("prev ", null, setAdj, ProcessList.PREVIOUS_APP_ADJ); |
| 309 | } else if (setAdj >= ProcessList.HOME_APP_ADJ) { |
| 310 | return buildOomTag("home ", null, setAdj, ProcessList.HOME_APP_ADJ); |
| 311 | } else if (setAdj >= ProcessList.SERVICE_ADJ) { |
| 312 | return buildOomTag("svc ", null, setAdj, ProcessList.SERVICE_ADJ); |
| 313 | } else if (setAdj >= ProcessList.HEAVY_WEIGHT_APP_ADJ) { |
| 314 | return buildOomTag("hvy ", null, setAdj, ProcessList.HEAVY_WEIGHT_APP_ADJ); |
| 315 | } else if (setAdj >= ProcessList.BACKUP_APP_ADJ) { |
| 316 | return buildOomTag("bkup ", null, setAdj, ProcessList.BACKUP_APP_ADJ); |
| 317 | } else if (setAdj >= ProcessList.PERCEPTIBLE_APP_ADJ) { |
| 318 | return buildOomTag("prcp ", null, setAdj, ProcessList.PERCEPTIBLE_APP_ADJ); |
| 319 | } else if (setAdj >= ProcessList.VISIBLE_APP_ADJ) { |
| 320 | return buildOomTag("vis ", null, setAdj, ProcessList.VISIBLE_APP_ADJ); |
| 321 | } else if (setAdj >= ProcessList.FOREGROUND_APP_ADJ) { |
| 322 | return buildOomTag("fore ", null, setAdj, ProcessList.FOREGROUND_APP_ADJ); |
| 323 | } else if (setAdj >= ProcessList.PERSISTENT_PROC_ADJ) { |
| 324 | return buildOomTag("pers ", null, setAdj, ProcessList.PERSISTENT_PROC_ADJ); |
| 325 | } else if (setAdj >= ProcessList.SYSTEM_ADJ) { |
| 326 | return buildOomTag("sys ", null, setAdj, ProcessList.SYSTEM_ADJ); |
| 327 | } else if (setAdj >= ProcessList.NATIVE_ADJ) { |
| 328 | return buildOomTag("ntv ", null, setAdj, ProcessList.NATIVE_ADJ); |
| 329 | } else { |
| 330 | return Integer.toString(setAdj); |
| 331 | } |
| 332 | } |
| 333 | |
Dianne Hackborn | 8e69257 | 2013-09-10 19:06:15 -0700 | [diff] [blame] | 334 | public static String makeProcStateString(int curProcState) { |
| 335 | String procState; |
| 336 | switch (curProcState) { |
| 337 | case -1: |
| 338 | procState = "N "; |
| 339 | break; |
| 340 | case ActivityManager.PROCESS_STATE_PERSISTENT: |
| 341 | procState = "P "; |
| 342 | break; |
| 343 | case ActivityManager.PROCESS_STATE_PERSISTENT_UI: |
| 344 | procState = "PU"; |
| 345 | break; |
| 346 | case ActivityManager.PROCESS_STATE_TOP: |
| 347 | procState = "T "; |
| 348 | break; |
| 349 | case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: |
| 350 | procState = "IF"; |
| 351 | break; |
| 352 | case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: |
| 353 | procState = "IB"; |
| 354 | break; |
| 355 | case ActivityManager.PROCESS_STATE_BACKUP: |
| 356 | procState = "BU"; |
| 357 | break; |
| 358 | case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: |
| 359 | procState = "HW"; |
| 360 | break; |
| 361 | case ActivityManager.PROCESS_STATE_SERVICE: |
| 362 | procState = "S "; |
| 363 | break; |
| 364 | case ActivityManager.PROCESS_STATE_RECEIVER: |
| 365 | procState = "R "; |
| 366 | break; |
| 367 | case ActivityManager.PROCESS_STATE_HOME: |
| 368 | procState = "HO"; |
| 369 | break; |
| 370 | case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: |
| 371 | procState = "LA"; |
| 372 | break; |
| 373 | case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: |
| 374 | procState = "CA"; |
| 375 | break; |
| 376 | case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: |
| 377 | procState = "Ca"; |
| 378 | break; |
| 379 | case ActivityManager.PROCESS_STATE_CACHED_EMPTY: |
| 380 | procState = "CE"; |
| 381 | break; |
| 382 | default: |
| 383 | procState = "??"; |
| 384 | break; |
| 385 | } |
| 386 | return procState; |
| 387 | } |
| 388 | |
| 389 | public static void appendRamKb(StringBuilder sb, long ramKb) { |
| 390 | for (int j=0, fact=10; j<6; j++, fact*=10) { |
| 391 | if (ramKb < fact) { |
| 392 | sb.append(' '); |
| 393 | } |
| 394 | } |
| 395 | sb.append(ramKb); |
| 396 | } |
| 397 | |
Dianne Hackborn | 3bc8f78d | 2013-09-19 13:34:35 -0700 | [diff] [blame] | 398 | // The minimum amount of time after a state change it is safe ro collect PSS. |
| 399 | public static final int PSS_MIN_TIME_FROM_STATE_CHANGE = 15*1000; |
| 400 | |
| 401 | // The maximum amount of time we want to go between PSS collections. |
| 402 | public static final int PSS_MAX_INTERVAL = 30*60*1000; |
| 403 | |
| 404 | // The minimum amount of time between successive PSS requests for *all* processes. |
| 405 | public static final int PSS_ALL_INTERVAL = 10*60*1000; |
| 406 | |
| 407 | // The minimum amount of time between successive PSS requests for a process. |
| 408 | private static final int PSS_SHORT_INTERVAL = 2*60*1000; |
| 409 | |
| 410 | // The amount of time until PSS when a process first becomes top. |
| 411 | private static final int PSS_FIRST_TOP_INTERVAL = 10*1000; |
| 412 | |
| 413 | // The amount of time until PSS when a process first goes into the background. |
| 414 | private static final int PSS_FIRST_BACKGROUND_INTERVAL = 20*1000; |
| 415 | |
| 416 | // The amount of time until PSS when a process first becomes cached. |
| 417 | private static final int PSS_FIRST_CACHED_INTERVAL = 30*1000; |
| 418 | |
| 419 | // The amount of time until PSS when an important process stays in the same state. |
| 420 | private static final int PSS_SAME_IMPORTANT_INTERVAL = 15*60*1000; |
| 421 | |
| 422 | // The amount of time until PSS when a service process stays in the same state. |
| 423 | private static final int PSS_SAME_SERVICE_INTERVAL = 20*60*1000; |
| 424 | |
| 425 | // The amount of time until PSS when a cached process stays in the same state. |
| 426 | private static final int PSS_SAME_CACHED_INTERVAL = 30*60*1000; |
| 427 | |
| 428 | public static final int PROC_MEM_PERSISTENT = 0; |
| 429 | public static final int PROC_MEM_TOP = 1; |
| 430 | public static final int PROC_MEM_IMPORTANT = 2; |
| 431 | public static final int PROC_MEM_SERVICE = 3; |
| 432 | public static final int PROC_MEM_CACHED = 4; |
| 433 | |
| 434 | private static final int[] sProcStateToProcMem = new int[] { |
| 435 | PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT |
| 436 | PROC_MEM_PERSISTENT, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| 437 | PROC_MEM_TOP, // ActivityManager.PROCESS_STATE_TOP |
| 438 | PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| 439 | PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| 440 | PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BACKUP |
| 441 | PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| 442 | PROC_MEM_SERVICE, // ActivityManager.PROCESS_STATE_SERVICE |
| 443 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_RECEIVER |
| 444 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_HOME |
| 445 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| 446 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| 447 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| 448 | PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| 449 | }; |
| 450 | |
| 451 | private static final long[] sFirstAwakePssTimes = new long[] { |
| 452 | PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT |
| 453 | PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| 454 | PSS_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP |
| 455 | PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| 456 | PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| 457 | PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP |
| 458 | PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| 459 | PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE |
| 460 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER |
| 461 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME |
| 462 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| 463 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| 464 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| 465 | PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| 466 | }; |
| 467 | |
| 468 | private static final long[] sSameAwakePssTimes = new long[] { |
| 469 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT |
| 470 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| 471 | PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_TOP |
| 472 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| 473 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| 474 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP |
| 475 | PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| 476 | PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE |
| 477 | PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER |
| 478 | PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME |
| 479 | PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| 480 | PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| 481 | PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| 482 | PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| 483 | }; |
| 484 | |
| 485 | public static boolean procStatesDifferForMem(int procState1, int procState2) { |
| 486 | return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2]; |
| 487 | } |
| 488 | |
Dianne Hackborn | f1cca18 | 2013-08-01 10:50:28 -0700 | [diff] [blame] | 489 | public static long computeNextPssTime(int procState, boolean first, boolean sleeping, |
| 490 | long now) { |
| 491 | final long[] table = sleeping |
| 492 | ? (first |
| 493 | ? sFirstAwakePssTimes |
| 494 | : sSameAwakePssTimes) |
| 495 | : (first |
| 496 | ? sFirstAwakePssTimes |
| 497 | : sSameAwakePssTimes); |
| 498 | return now + table[procState]; |
| 499 | } |
| 500 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 501 | long getMemLevel(int adjustment) { |
| 502 | for (int i=0; i<mOomAdj.length; i++) { |
| 503 | if (adjustment <= mOomAdj[i]) { |
| 504 | return mOomMinFree[i] * 1024; |
| 505 | } |
| 506 | } |
| 507 | return mOomMinFree[mOomAdj.length-1] * 1024; |
| 508 | } |
| 509 | |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 510 | /** |
Dianne Hackborn | 3bc8f78d | 2013-09-19 13:34:35 -0700 | [diff] [blame] | 511 | * Return the maximum pss size in kb that we consider a process acceptable to |
| 512 | * restore from its cached state for running in the background when RAM is low. |
| 513 | */ |
Dianne Hackborn | cbd9a52 | 2013-09-24 23:10:14 -0700 | [diff] [blame] | 514 | long getCachedRestoreThresholdKb() { |
Dianne Hackborn | 3bc8f78d | 2013-09-19 13:34:35 -0700 | [diff] [blame] | 515 | return mCachedRestoreLevel; |
| 516 | } |
| 517 | |
Dianne Hackborn | 9bef5b6 | 2013-09-20 10:40:34 -0700 | [diff] [blame] | 518 | /** |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 519 | * Set the out-of-memory badness adjustment for a process. |
| 520 | * |
| 521 | * @param pid The process identifier to set. |
| 522 | * @param amt Adjustment value -- lmkd allows -16 to +15. |
| 523 | * |
| 524 | * {@hide} |
| 525 | */ |
| 526 | public static final void setOomAdj(int pid, int amt) { |
| 527 | if (amt == UNKNOWN_ADJ) |
| 528 | return; |
| 529 | |
| 530 | ByteBuffer buf = ByteBuffer.allocate(4 * 3); |
| 531 | buf.putInt(LMK_PROCPRIO); |
| 532 | buf.putInt(pid); |
| 533 | buf.putInt(amt); |
| 534 | writeLmkd(buf); |
| 535 | } |
| 536 | |
| 537 | /* |
| 538 | * {@hide} |
| 539 | */ |
| 540 | public static final void remove(int pid) { |
| 541 | ByteBuffer buf = ByteBuffer.allocate(4 * 2); |
| 542 | buf.putInt(LMK_PROCREMOVE); |
| 543 | buf.putInt(pid); |
| 544 | writeLmkd(buf); |
| 545 | } |
| 546 | |
| 547 | private static boolean openLmkdSocket() { |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 548 | try { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 549 | sLmkdSocket = new LocalSocket(LocalSocket.SOCKET_SEQPACKET); |
| 550 | sLmkdSocket.connect( |
| 551 | new LocalSocketAddress("lmkd", |
| 552 | LocalSocketAddress.Namespace.RESERVED)); |
| 553 | sLmkdOutputStream = sLmkdSocket.getOutputStream(); |
| 554 | } catch (IOException ex) { |
| 555 | Slog.w(ActivityManagerService.TAG, |
| 556 | "lowmemorykiller daemon socket open failed"); |
| 557 | sLmkdSocket = null; |
| 558 | return false; |
| 559 | } |
| 560 | |
| 561 | return true; |
| 562 | } |
| 563 | |
| 564 | private static void writeLmkd(ByteBuffer buf) { |
| 565 | |
| 566 | for (int i = 0; i < 3; i++) { |
| 567 | if (sLmkdSocket == null) { |
| 568 | if (openLmkdSocket() == false) { |
| 569 | try { |
| 570 | Thread.sleep(1000); |
| 571 | } catch (InterruptedException ie) { |
| 572 | } |
| 573 | continue; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | try { |
| 578 | sLmkdOutputStream.write(buf.array(), 0, buf.position()); |
| 579 | return; |
| 580 | } catch (IOException ex) { |
| 581 | Slog.w(ActivityManagerService.TAG, |
| 582 | "Error writing to lowmemorykiller socket"); |
| 583 | |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 584 | try { |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 585 | sLmkdSocket.close(); |
| 586 | } catch (IOException ex2) { |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 587 | } |
Todd Poynor | bfdd623 | 2013-07-10 19:15:07 -0700 | [diff] [blame] | 588 | |
| 589 | sLmkdSocket = null; |
Dianne Hackborn | 7d60842 | 2011-08-07 16:24:18 -0700 | [diff] [blame] | 590 | } |
| 591 | } |
| 592 | } |
| 593 | } |