Signal lmkd to start psi monitoring after boot.
To save CPU cycles during boot for low resource device a new
configuration is added to delay registration of psi monitoring until
boot is complete. ActivityManagerService will send an lmkd message to
start psi monitoring after boot.
Bug: 288566858
Test: Build, boot and verified boot logs to confirm the behavior.
Change-Id: Iee5cecdae54304b092c6a1801f3814e13a919be2
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index eb7d5c3..3856d27 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -5061,6 +5061,10 @@
// Tell anyone interested that we are done booting!
SystemProperties.set("sys.boot_completed", "1");
SystemProperties.set("dev.bootcomplete", "1");
+
+ // Start PSI monitoring in LMKD if it was skipped earlier.
+ ProcessList.startPsiMonitoringAfterBoot();
+
mUserController.onBootComplete(
new IIntentReceiver.Stub() {
@Override
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index acd9771..e484a6c 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -357,6 +357,7 @@
static final byte LMK_UPDATE_PROPS = 7;
static final byte LMK_KILL_OCCURRED = 8; // Msg to subscribed clients on kill occurred event
static final byte LMK_STATE_CHANGED = 9; // Msg to subscribed clients on state changed
+ static final byte LMK_START_MONITORING = 9; // Start monitoring if delayed earlier
// Low Memory Killer Daemon command codes.
// These must be kept in sync with async_event_type definitions in lmkd.h
@@ -1568,6 +1569,15 @@
return true;
}
+ /**
+ * {@hide}
+ */
+ public static void startPsiMonitoringAfterBoot() {
+ ByteBuffer buf = ByteBuffer.allocate(4);
+ buf.putInt(LMK_START_MONITORING);
+ writeLmkd(buf, null);
+ }
+
private static boolean writeLmkd(ByteBuffer buf, ByteBuffer repl) {
if (!sLmkdConnection.isConnected()) {
// try to connect immediately and then keep retrying