Merge "Add batchSetOomAdj()" into main
diff --git a/services/core/java/com/android/server/am/ActivityManagerConstants.java b/services/core/java/com/android/server/am/ActivityManagerConstants.java
index 26aa053..2c04883 100644
--- a/services/core/java/com/android/server/am/ActivityManagerConstants.java
+++ b/services/core/java/com/android/server/am/ActivityManagerConstants.java
@@ -169,6 +169,11 @@
*/
static final String KEY_ENABLE_NEW_OOMADJ = "enable_new_oom_adj";
+ /**
+ * Whether or not to enable the batching of OOM adjuster calls to LMKD
+ */
+ static final String KEY_ENABLE_BATCHING_OOM_ADJ = "enable_batching_oom_adj";
+
private static final int DEFAULT_MAX_CACHED_PROCESSES = 1024;
private static final boolean DEFAULT_PRIORITIZE_ALARM_BROADCASTS = true;
private static final long DEFAULT_FGSERVICE_MIN_SHOWN_TIME = 2*1000;
@@ -244,6 +249,11 @@
private static final boolean DEFAULT_ENABLE_NEW_OOM_ADJ = Flags.oomadjusterCorrectnessRewrite();
/**
+ * The default value to {@link #KEY_ENABLE_BATCHING_OOM_ADJ}.
+ */
+ private static final boolean DEFAULT_ENABLE_BATCHING_OOM_ADJ = Flags.batchingOomAdj();
+
+ /**
* Same as {@link TEMPORARY_ALLOW_LIST_TYPE_FOREGROUND_SERVICE_NOT_ALLOWED}
*/
private static final int
@@ -1136,6 +1146,9 @@
/** @see #KEY_ENABLE_NEW_OOMADJ */
public boolean ENABLE_NEW_OOMADJ = DEFAULT_ENABLE_NEW_OOM_ADJ;
+ /** @see #KEY_ENABLE_BATCHING_OOM_ADJ */
+ public boolean ENABLE_BATCHING_OOM_ADJ = DEFAULT_ENABLE_BATCHING_OOM_ADJ;
+
/**
* Indicates whether PSS profiling in AppProfiler is disabled or not.
*/
@@ -1479,6 +1492,8 @@
private void loadNativeBootDeviceConfigConstants() {
ENABLE_NEW_OOMADJ = getDeviceConfigBoolean(KEY_ENABLE_NEW_OOMADJ,
DEFAULT_ENABLE_NEW_OOM_ADJ);
+ ENABLE_BATCHING_OOM_ADJ = getDeviceConfigBoolean(KEY_ENABLE_BATCHING_OOM_ADJ,
+ DEFAULT_ENABLE_BATCHING_OOM_ADJ);
}
public void setOverrideMaxCachedProcesses(int value) {
@@ -2248,6 +2263,13 @@
mDefaultPssToRssThresholdModifier);
}
+ private void updateEnableBatchingOomAdj() {
+ ENABLE_BATCHING_OOM_ADJ = DeviceConfig.getBoolean(
+ DeviceConfig.NAMESPACE_ACTIVITY_MANAGER_NATIVE_BOOT,
+ KEY_ENABLE_BATCHING_OOM_ADJ,
+ DEFAULT_ENABLE_BATCHING_OOM_ADJ);
+ }
+
boolean shouldDebugUidForProcState(int uid) {
SparseBooleanArray ar = mProcStateDebugUids;
final var size = ar.size();
@@ -2476,6 +2498,9 @@
pw.print(" "); pw.print(KEY_MAX_PREVIOUS_TIME);
pw.print("="); pw.println(MAX_PREVIOUS_TIME);
+ pw.print(" "); pw.print(KEY_ENABLE_BATCHING_OOM_ADJ);
+ pw.print("="); pw.println(ENABLE_BATCHING_OOM_ADJ);
+
pw.println();
if (mOverrideMaxCachedProcesses >= 0) {
pw.print(" mOverrideMaxCachedProcesses="); pw.println(mOverrideMaxCachedProcesses);
diff --git a/services/core/java/com/android/server/am/OomAdjuster.java b/services/core/java/com/android/server/am/OomAdjuster.java
index ab34dd4..fc81d3e 100644
--- a/services/core/java/com/android/server/am/OomAdjuster.java
+++ b/services/core/java/com/android/server/am/OomAdjuster.java
@@ -384,6 +384,13 @@
protected final ArraySet<ProcessRecord> mProcessesInCycle = new ArraySet<>();
/**
+ * List of processes that we want to batch for LMKD to adjust their respective
+ * OOM scores.
+ */
+ @GuardedBy("mService")
+ protected final ArrayList<ProcessRecord> mProcsToOomAdj = new ArrayList<ProcessRecord>();
+
+ /**
* Flag to mark if there is an ongoing oomAdjUpdate: potentially the oomAdjUpdate
* could be called recursively because of the indirect calls during the update;
* however the oomAdjUpdate itself doesn't support recursion - in this case we'd
@@ -1246,7 +1253,7 @@
if (!app.isKilledByAm() && app.getThread() != null) {
// We don't need to apply the update for the process which didn't get computed
if (state.getCompletedAdjSeq() == mAdjSeq) {
- applyOomAdjLSP(app, doingAll, now, nowElapsed, oomAdjReason);
+ applyOomAdjLSP(app, doingAll, now, nowElapsed, oomAdjReason, true);
}
if (app.isPendingFinishAttach()) {
@@ -1348,6 +1355,11 @@
}
}
+ if (!mProcsToOomAdj.isEmpty()) {
+ ProcessList.batchSetOomAdj(mProcsToOomAdj);
+ mProcsToOomAdj.clear();
+ }
+
if (proactiveKillsEnabled // Proactive kills enabled?
&& doKillExcessiveProcesses // Should kill excessive processes?
&& freeSwapPercent < lowSwapThresholdPercent // Swap below threshold?
@@ -3246,10 +3258,16 @@
mCachedAppOptimizer.onWakefulnessChanged(wakefulness);
}
+ @GuardedBy({"mService", "mProcLock"})
+ protected boolean applyOomAdjLSP(ProcessRecord app, boolean doingAll, long now,
+ long nowElapsed, @OomAdjReason int oomAdjReason) {
+ return applyOomAdjLSP(app, doingAll, now, nowElapsed, oomAdjReason, false);
+ }
+
/** Applies the computed oomadj, procstate and sched group values and freezes them in set* */
@GuardedBy({"mService", "mProcLock"})
protected boolean applyOomAdjLSP(ProcessRecord app, boolean doingAll, long now,
- long nowElapsed, @OomAdjReason int oomAdjReson) {
+ long nowElapsed, @OomAdjReason int oomAdjReson, boolean isBatchingOomAdj) {
boolean success = true;
final ProcessStateRecord state = app.mState;
final UidRecord uidRec = app.getUidRecord();
@@ -3266,7 +3284,12 @@
final int oldOomAdj = state.getSetAdj();
if (state.getCurAdj() != state.getSetAdj()) {
- ProcessList.setOomAdj(app.getPid(), app.uid, state.getCurAdj());
+ if (isBatchingOomAdj && mConstants.ENABLE_BATCHING_OOM_ADJ) {
+ mProcsToOomAdj.add(app);
+ } else {
+ ProcessList.setOomAdj(app.getPid(), app.uid, state.getCurAdj());
+ }
+
if (DEBUG_SWITCH || DEBUG_OOM_ADJ || mService.mCurOomAdjUid == app.info.uid) {
String msg = "Set " + app.getPid() + " " + app.processName + " adj "
+ state.getCurAdj() + ": " + state.getAdjType();
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index 219de70..c094724 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -354,6 +354,7 @@
// LMK_KILL_OCCURRED
// LMK_START_MONITORING
// LMK_BOOT_COMPLETED
+ // LMK_PROCS_PRIO
static final byte LMK_TARGET = 0;
static final byte LMK_PROCPRIO = 1;
static final byte LMK_PROCREMOVE = 2;
@@ -365,6 +366,7 @@
static final byte LMK_KILL_OCCURRED = 8; // Msg to subscribed clients on kill occurred event
static final byte LMK_START_MONITORING = 9; // Start monitoring if delayed earlier
static final byte LMK_BOOT_COMPLETED = 10;
+ static final byte LMK_PROCS_PRIO = 11; // Batch option for LMK_PROCPRIO
// Low Memory Killer Daemon command codes.
// These must be kept in sync with async_event_type definitions in lmkd.h
@@ -1561,6 +1563,50 @@
}
}
+
+ // The max size for PROCS_PRIO cmd in LMKD
+ private static final int MAX_PROCS_PRIO_PACKET_SIZE = 3;
+
+ // (4 bytes per field * 4 fields * 3 processes per batch) + 4 bytes for the LMKD cmd
+ private static final int MAX_OOM_ADJ_BATCH_LENGTH = ((4 * 4) * MAX_PROCS_PRIO_PACKET_SIZE) + 4;
+
+ /**
+ * Set the out-of-memory badness adjustment for a list of processes.
+ *
+ * @param apps App list to adjust their respective oom score.
+ *
+ * {@hide}
+ */
+ public static void batchSetOomAdj(ArrayList<ProcessRecord> apps) {
+ final int totalApps = apps.size();
+ if (totalApps == 0) {
+ return;
+ }
+
+ ByteBuffer buf = ByteBuffer.allocate(MAX_OOM_ADJ_BATCH_LENGTH);
+ int total_procs_in_buf = 0;
+ buf.putInt(LMK_PROCS_PRIO);
+ for (int i = 0; i < totalApps; i++) {
+ final int pid = apps.get(i).getPid();
+ final int amt = apps.get(i).mState.getCurAdj();
+ final int uid = apps.get(i).uid;
+ if (pid <= 0 || amt == UNKNOWN_ADJ) continue;
+ if (total_procs_in_buf >= MAX_PROCS_PRIO_PACKET_SIZE) {
+ writeLmkd(buf, null);
+ buf.clear();
+ total_procs_in_buf = 0;
+ buf.allocate(MAX_OOM_ADJ_BATCH_LENGTH);
+ buf.putInt(LMK_PROCS_PRIO);
+ }
+ buf.putInt(pid);
+ buf.putInt(uid);
+ buf.putInt(amt);
+ buf.putInt(0); // Default proc type to PROC_TYPE_APP
+ total_procs_in_buf++;
+ }
+ writeLmkd(buf, null);
+ }
+
/*
* {@hide}
*/
diff --git a/services/core/java/com/android/server/am/flags.aconfig b/services/core/java/com/android/server/am/flags.aconfig
index afde4f7..2abfad9 100644
--- a/services/core/java/com/android/server/am/flags.aconfig
+++ b/services/core/java/com/android/server/am/flags.aconfig
@@ -134,3 +134,11 @@
purpose: PURPOSE_BUGFIX
}
}
+
+flag {
+ name: "batching_oom_adj"
+ namespace: "backstage_power"
+ description: "Batch OOM adjustment calls to LMKD"
+ bug: "244232958"
+ is_fixed_read_only: true
+}