| /* |
| * 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 java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| import android.app.ActivityManager; |
| 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.util.Slog; |
| import android.view.Display; |
| |
| /** |
| * Activity manager code dealing with processes. |
| */ |
| final class ProcessList { |
| // 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: |
| |
| // 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 = 16; |
| |
| // 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 = 15; |
| static final int CACHED_APP_MIN_ADJ = 9; |
| |
| // 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 = 8; |
| |
| // 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 = 7; |
| |
| // 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 = 6; |
| |
| // 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 = 5; |
| |
| // 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 = 4; |
| |
| // 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 = 3; |
| |
| // 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 = 2; |
| |
| // 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 = 1; |
| |
| // 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 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 = -12; |
| |
| // The system process runs at the default adjustment. |
| static final int SYSTEM_ADJ = -16; |
| |
| // 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 = -17; |
| |
| // Memory pages are 4K. |
| static final int PAGE_SIZE = 4*1024; |
| |
| // 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; |
| |
| // The maximum number of cached processes we will keep around before killing them. |
| // NOTE: this constant is *only* a control to not let us go too crazy with |
| // keeping around processes on devices with large amounts of RAM. For devices that |
| // are tighter on RAM, the out of memory killer is responsible for killing background |
| // processes as RAM is needed, and we should *never* be relying on this limit to |
| // kill them. Also note that this limit only applies to cached background processes; |
| // we have no limit on the number of service, visible, foreground, or other such |
| // processes and the number of those processes does not count against the cached |
| // process limit. |
| static final int MAX_CACHED_APPS = 24; |
| |
| // We allow empty processes to stick around for at most 30 minutes. |
| static final long MAX_EMPTY_TIME = 30*60*1000; |
| |
| // The maximum number of empty app processes we will let sit around. |
| private static final int MAX_EMPTY_APPS = computeEmptyProcessLimit(MAX_CACHED_APPS); |
| |
| // The number of empty apps at which we don't consider it necessary to do |
| // memory trimming. |
| static final int TRIM_EMPTY_APPS = MAX_EMPTY_APPS/2; |
| |
| // The number of cached at which we don't consider it necessary to do |
| // memory trimming. |
| static final int TRIM_CACHED_APPS = ((MAX_CACHED_APPS-MAX_EMPTY_APPS)*2)/3; |
| |
| // 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; |
| |
| // 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 long[] mOomMinFreeLow = new long[] { |
| 8192, 12288, 16384, |
| 24576, 28672, 32768 |
| }; |
| // 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 long[] mOomMinFreeHigh = new long[] { |
| 49152, 61440, 73728, |
| 86016, 98304, 122880 |
| }; |
| // The actual OOM killer memory levels we are using. |
| private final long[] mOomMinFree = new long[mOomAdj.length]; |
| |
| private final long mTotalMemMb; |
| |
| private long mCachedRestoreLevel; |
| |
| private boolean mHaveDisplaySize; |
| |
| 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(); |
| 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-300))/(700-300); |
| |
| // 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); |
| } |
| |
| StringBuilder adjString = new StringBuilder(); |
| StringBuilder memString = new StringBuilder(); |
| |
| 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); |
| } |
| |
| for (int i=0; i<mOomAdj.length; i++) { |
| long low = mOomMinFreeLow[i]; |
| long high = mOomMinFreeHigh[i]; |
| mOomMinFree[i] = (long)(low + ((high-low)*scale)); |
| } |
| |
| if (minfree_abs >= 0) { |
| for (int i=0; i<mOomAdj.length; i++) { |
| mOomMinFree[i] = (long)((float)minfree_abs * mOomMinFree[i] / mOomMinFree[mOomAdj.length - 1]); |
| } |
| } |
| |
| if (minfree_adj != 0) { |
| for (int i=0; i<mOomAdj.length; i++) { |
| mOomMinFree[i] += (long)((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; |
| |
| for (int i=0; i<mOomAdj.length; i++) { |
| if (i > 0) { |
| adjString.append(','); |
| memString.append(','); |
| } |
| adjString.append(mOomAdj[i]); |
| memString.append((mOomMinFree[i]*1024)/PAGE_SIZE); |
| } |
| |
| // 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; |
| } |
| } |
| |
| //Slog.i("XXXXXXX", "******************************* MINFREE: " + memString); |
| if (write) { |
| writeFile("/sys/module/lowmemorykiller/parameters/adj", adjString.toString()); |
| writeFile("/sys/module/lowmemorykiller/parameters/minfree", memString.toString()); |
| 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)/3; |
| } |
| |
| 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_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 -1: |
| procState = "N "; |
| break; |
| case ActivityManager.PROCESS_STATE_PERSISTENT: |
| procState = "P "; |
| break; |
| case ActivityManager.PROCESS_STATE_PERSISTENT_UI: |
| procState = "PU"; |
| break; |
| case ActivityManager.PROCESS_STATE_TOP: |
| procState = "T "; |
| break; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND: |
| procState = "IF"; |
| break; |
| case ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND: |
| procState = "IB"; |
| break; |
| case ActivityManager.PROCESS_STATE_BACKUP: |
| procState = "BU"; |
| break; |
| case ActivityManager.PROCESS_STATE_HEAVY_WEIGHT: |
| procState = "HW"; |
| break; |
| case ActivityManager.PROCESS_STATE_SERVICE: |
| procState = "S "; |
| break; |
| case ActivityManager.PROCESS_STATE_RECEIVER: |
| procState = "R "; |
| break; |
| case ActivityManager.PROCESS_STATE_HOME: |
| procState = "HO"; |
| break; |
| case ActivityManager.PROCESS_STATE_LAST_ACTIVITY: |
| procState = "LA"; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY: |
| procState = "CA"; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT: |
| procState = "Ca"; |
| break; |
| case ActivityManager.PROCESS_STATE_CACHED_EMPTY: |
| procState = "CE"; |
| break; |
| default: |
| procState = "??"; |
| break; |
| } |
| return procState; |
| } |
| |
| 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); |
| } |
| |
| // The minimum amount of time after a state change it is safe ro 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 = 30*60*1000; |
| |
| // The minimum amount of time between successive PSS requests for *all* processes. |
| public static final int PSS_ALL_INTERVAL = 10*60*1000; |
| |
| // The minimum amount of time between successive PSS requests for a process. |
| private static final int PSS_SHORT_INTERVAL = 2*60*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 = 30*1000; |
| |
| // The amount of time until PSS when an important process stays in the same state. |
| private static final int PSS_SAME_IMPORTANT_INTERVAL = 15*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 = 20*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 = 30*60*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; |
| |
| 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_IMPORTANT_FOREGROUND |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_BACKUP |
| PROC_MEM_IMPORTANT, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| PROC_MEM_SERVICE, // ActivityManager.PROCESS_STATE_SERVICE |
| PROC_MEM_CACHED, // ActivityManager.PROCESS_STATE_RECEIVER |
| 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_EMPTY |
| }; |
| |
| private static final long[] sFirstAwakePssTimes = new long[] { |
| PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT |
| PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| PSS_FIRST_TOP_INTERVAL, // ActivityManager.PROCESS_STATE_TOP |
| PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP |
| PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| PSS_FIRST_BACKGROUND_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| PSS_FIRST_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| }; |
| |
| private static final long[] sSameAwakePssTimes = new long[] { |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_PERSISTENT_UI |
| PSS_SHORT_INTERVAL, // ActivityManager.PROCESS_STATE_TOP |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_BACKUP |
| PSS_SAME_IMPORTANT_INTERVAL, // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT |
| PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_SERVICE |
| PSS_SAME_SERVICE_INTERVAL, // ActivityManager.PROCESS_STATE_RECEIVER |
| PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_HOME |
| PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_LAST_ACTIVITY |
| PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY |
| PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT |
| PSS_SAME_CACHED_INTERVAL, // ActivityManager.PROCESS_STATE_CACHED_EMPTY |
| }; |
| |
| public static boolean procStatesDifferForMem(int procState1, int procState2) { |
| return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2]; |
| } |
| |
| public static long computeNextPssTime(int procState, boolean first, boolean sleeping, |
| long now) { |
| final long[] table = sleeping |
| ? (first |
| ? sFirstAwakePssTimes |
| : sSameAwakePssTimes) |
| : (first |
| ? sFirstAwakePssTimes |
| : sSameAwakePssTimes); |
| return now + table[procState]; |
| } |
| |
| 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; |
| } |
| |
| private void writeFile(String path, String data) { |
| FileOutputStream fos = null; |
| try { |
| fos = new FileOutputStream(path); |
| fos.write(data.getBytes()); |
| } catch (IOException e) { |
| Slog.w(ActivityManagerService.TAG, "Unable to write " + path); |
| } finally { |
| if (fos != null) { |
| try { |
| fos.close(); |
| } catch (IOException e) { |
| } |
| } |
| } |
| } |
| } |
