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-rw-r--r--core/java/android/os/Process.java13
-rw-r--r--core/jni/android_util_Process.cpp18
-rw-r--r--services/core/java/com/android/server/am/ActivityManagerService.java20
-rw-r--r--services/core/java/com/android/server/am/ProcessList.java135
4 files changed, 113 insertions, 73 deletions
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 631edd67957b..057f516af17b 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -892,19 +892,6 @@ public class Process {
}
/**
- * Set the out-of-memory badness adjustment for a process.
- *
- * @param pid The process identifier to set.
- * @param amt Adjustment value -- linux allows -16 to +15.
- *
- * @return Returns true if the underlying system supports this
- * feature, else false.
- *
- * {@hide}
- */
- public static final native boolean setOomAdj(int pid, int amt);
-
- /**
* Adjust the swappiness level for a process.
*
* @param pid The process identifier to set.
diff --git a/core/jni/android_util_Process.cpp b/core/jni/android_util_Process.cpp
index 601975af01b9..cbed99f9acad 100644
--- a/core/jni/android_util_Process.cpp
+++ b/core/jni/android_util_Process.cpp
@@ -344,23 +344,6 @@ jint android_os_Process_getThreadPriority(JNIEnv* env, jobject clazz,
return pri;
}
-jboolean android_os_Process_setOomAdj(JNIEnv* env, jobject clazz,
- jint pid, jint adj)
-{
-#ifdef HAVE_OOM_ADJ
- char text[64];
- sprintf(text, "/proc/%d/oom_adj", pid);
- int fd = open(text, O_WRONLY);
- if (fd >= 0) {
- sprintf(text, "%d", adj);
- write(fd, text, strlen(text));
- close(fd);
- }
- return true;
-#endif
- return false;
-}
-
jboolean android_os_Process_setSwappiness(JNIEnv *env, jobject clazz,
jint pid, jboolean is_increased)
{
@@ -1023,7 +1006,6 @@ static const JNINativeMethod methods[] = {
{"setThreadGroup", "(II)V", (void*)android_os_Process_setThreadGroup},
{"setProcessGroup", "(II)V", (void*)android_os_Process_setProcessGroup},
{"getProcessGroup", "(I)I", (void*)android_os_Process_getProcessGroup},
- {"setOomAdj", "(II)Z", (void*)android_os_Process_setOomAdj},
{"setSwappiness", "(IZ)Z", (void*)android_os_Process_setSwappiness},
{"setArgV0", "(Ljava/lang/String;)V", (void*)android_os_Process_setArgV0},
{"setUid", "(I)I", (void*)android_os_Process_setUid},
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 4540c1cbbe6b..39067459d08a 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -3592,9 +3592,13 @@ public final class ActivityManagerService extends ActivityManagerNative
*/
private final void handleAppDiedLocked(ProcessRecord app,
boolean restarting, boolean allowRestart) {
+ int pid = app.pid;
cleanUpApplicationRecordLocked(app, restarting, allowRestart, -1);
if (!restarting) {
removeLruProcessLocked(app);
+ if (pid > 0) {
+ ProcessList.remove(pid);
+ }
}
if (mProfileProc == app) {
@@ -12319,6 +12323,7 @@ public final class ActivityManagerService extends ActivityManagerNative
boolean restarting, boolean allowRestart, int index) {
if (index >= 0) {
removeLruProcessLocked(app);
+ ProcessList.remove(app.pid);
}
mProcessesToGc.remove(app);
@@ -15181,16 +15186,13 @@ public final class ActivityManagerService extends ActivityManagerNative
}
if (app.curAdj != app.setAdj) {
- if (Process.setOomAdj(app.pid, app.curAdj)) {
- if (DEBUG_SWITCH || DEBUG_OOM_ADJ) Slog.v(
- TAG, "Set " + app.pid + " " + app.processName +
- " adj " + app.curAdj + ": " + app.adjType);
- app.setAdj = app.curAdj;
- } else {
- success = false;
- Slog.w(TAG, "Failed setting oom adj of " + app + " to " + app.curAdj);
- }
+ ProcessList.setOomAdj(app.pid, app.curAdj);
+ if (DEBUG_SWITCH || DEBUG_OOM_ADJ) Slog.v(
+ TAG, "Set " + app.pid + " " + app.processName +
+ " adj " + app.curAdj + ": " + app.adjType);
+ app.setAdj = app.curAdj;
}
+
if (app.setSchedGroup != app.curSchedGroup) {
app.setSchedGroup = app.curSchedGroup;
if (DEBUG_SWITCH || DEBUG_OOM_ADJ) Slog.v(TAG,
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index d3777c7ae134..f5920c8db355 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -18,6 +18,8 @@ package com.android.server.am;
import java.io.FileOutputStream;
import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
import android.app.ActivityManager;
import com.android.internal.util.MemInfoReader;
@@ -26,6 +28,8 @@ 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;
@@ -141,6 +145,16 @@ final class ProcessList {
// 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> <prio>
+ // LMK_PROCREMOVE <pid>
+ static final byte LMK_TARGET = 0;
+ static final byte LMK_PROCPRIO = 1;
+ static final byte LMK_PROCREMOVE = 2;
+
// 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.
@@ -150,18 +164,18 @@ final class ProcessList {
};
// 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[] {
+ private final int[] mOomMinFreeLow = new int[] {
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[] {
+ private final int[] mOomMinFreeHigh = new int[] {
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 int[] mOomMinFree = new int[mOomAdj.length];
private final long mTotalMemMb;
@@ -169,6 +183,9 @@ final class ProcessList {
private boolean mHaveDisplaySize;
+ private static LocalSocket sLmkdSocket;
+ private static OutputStream sLmkdOutputStream;
+
ProcessList() {
MemInfoReader minfo = new MemInfoReader();
minfo.readMemInfo();
@@ -202,9 +219,6 @@ final class ProcessList {
+ " 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;
@@ -217,20 +231,20 @@ final class ProcessList {
}
for (int i=0; i<mOomAdj.length; i++) {
- long low = mOomMinFreeLow[i];
- long high = mOomMinFreeHigh[i];
- mOomMinFree[i] = (long)(low + ((high-low)*scale));
+ int low = mOomMinFreeLow[i];
+ int high = mOomMinFreeHigh[i];
+ mOomMinFree[i] = (int)(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]);
+ 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] += (long)((float)minfree_adj * mOomMinFree[i] / mOomMinFree[mOomAdj.length - 1]);
+ mOomMinFree[i] += (int)((float)minfree_adj * mOomMinFree[i] / mOomMinFree[mOomAdj.length - 1]);
if (mOomMinFree[i] < 0) {
mOomMinFree[i] = 0;
}
@@ -242,15 +256,6 @@ final class ProcessList {
// 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;
@@ -268,10 +273,15 @@ final class ProcessList {
}
}
- //Slog.i("XXXXXXX", "******************************* MINFREE: " + memString);
if (write) {
- writeFile("/sys/module/lowmemorykiller/parameters/adj", adjString.toString());
- writeFile("/sys/module/lowmemorykiller/parameters/minfree", memString.toString());
+ 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
@@ -506,19 +516,78 @@ final class ProcessList {
return mCachedRestoreLevel;
}
- private void writeFile(String path, String data) {
- FileOutputStream fos = null;
+ /**
+ * Set the out-of-memory badness adjustment for a process.
+ *
+ * @param pid The process identifier to set.
+ * @param amt Adjustment value -- lmkd allows -16 to +15.
+ *
+ * {@hide}
+ */
+ public static final void setOomAdj(int pid, int amt) {
+ if (amt == UNKNOWN_ADJ)
+ return;
+
+ ByteBuffer buf = ByteBuffer.allocate(4 * 3);
+ buf.putInt(LMK_PROCPRIO);
+ buf.putInt(pid);
+ buf.putInt(amt);
+ writeLmkd(buf);
+ }
+
+ /*
+ * {@hide}
+ */
+ public static final void remove(int pid) {
+ ByteBuffer buf = ByteBuffer.allocate(4 * 2);
+ buf.putInt(LMK_PROCREMOVE);
+ buf.putInt(pid);
+ writeLmkd(buf);
+ }
+
+ private static boolean openLmkdSocket() {
try {
- fos = new FileOutputStream(path);
- fos.write(data.getBytes());
- } catch (IOException e) {
- Slog.w(ActivityManagerService.TAG, "Unable to write " + path);
- } finally {
- if (fos != null) {
+ sLmkdSocket = new LocalSocket(LocalSocket.SOCKET_SEQPACKET);
+ sLmkdSocket.connect(
+ new LocalSocketAddress("lmkd",
+ LocalSocketAddress.Namespace.RESERVED));
+ sLmkdOutputStream = sLmkdSocket.getOutputStream();
+ } catch (IOException ex) {
+ Slog.w(ActivityManagerService.TAG,
+ "lowmemorykiller daemon socket open failed");
+ 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;
+ }
+ }
+
+ try {
+ sLmkdOutputStream.write(buf.array(), 0, buf.position());
+ return;
+ } catch (IOException ex) {
+ Slog.w(ActivityManagerService.TAG,
+ "Error writing to lowmemorykiller socket");
+
try {
- fos.close();
- } catch (IOException e) {
+ sLmkdSocket.close();
+ } catch (IOException ex2) {
}
+
+ sLmkdSocket = null;
}
}
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-10-31 19:44:48 +0000