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Commit 77c0b5a0 authored by Lee George Thomas's avatar Lee George Thomas
Browse files

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
parent 45ea8d3e

services/core/java/com/android/server/am/ActivityManagerService.java

+4 −0
Original line number Diff line number Diff line
@@ -5061,6 +5061,10 @@ public class ActivityManagerService extends IActivityManager.Stub 
            // 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

































services/core/java/com/android/server/am/ProcessList.java



+10
−0




























Original line number
Diff line number
Diff line








@@ -357,6 +357,7 @@ public final class ProcessList {













    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 @@ public final class ProcessList {













        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