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Commit 5b926997 authored by Jorim Jaggi's avatar Jorim Jaggi
Browse files

Trace currently resumed app 

Since we now have the ability to multi-hour systraces from
devices used daily, it's useful to do additional segmentation
and understanding what part of an app's runtime is due to it
being in foreground vs background.

Test: go/wm-smoke
Test: Take trace, check whether currently resumed app is being
traced.

Bug: 69862220
Change-Id: Idaf9af4c366dfedb29d07b75f7eaf17d9a2165a0
parent ec243338

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

+26 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ import static android.os.Process.setThreadPriority; 
import static android.os.Process.setThreadScheduler;

import static android.os.Process.startWebView;

import static android.os.Process.zygoteProcess;

import static android.os.Trace.TRACE_TAG_ACTIVITY_MANAGER;

import static android.provider.Settings.Global.ALWAYS_FINISH_ACTIVITIES;

import static android.provider.Settings.Global.DEBUG_APP;

import static android.provider.Settings.Global.DEVELOPMENT_ENABLE_FREEFORM_WINDOWS_SUPPORT;
@@ -736,6 +737,13 @@ public class ActivityManagerService extends IActivityManager.Stub 
     */

    private ActivityRecord mLastResumedActivity;













    /**













     * The activity that is currently being traced as the active resumed activity.













     *













     * @see #updateResumedAppTrace













     */













    private @Nullable ActivityRecord mTracedResumedActivity;



























    /**















     * If non-null, we are tracking the time the user spends in the currently focused app.















     */










@@ -3423,6 +3431,7 @@ public class ActivityManagerService extends IActivityManager.Stub













        if (mLastResumedActivity != null && r.userId != mLastResumedActivity.userId) {















            mUserController.sendForegroundProfileChanged(r.userId);















        }













        updateResumedAppTrace(r);















        mLastResumedActivity = r;





























        mWindowManager.setFocusedApp(r.appToken, true);









@@ -3436,6 +3445,22 @@ public class ActivityManagerService extends IActivityManager.Stub













                reason);















    }



























    private void updateResumedAppTrace(@Nullable ActivityRecord resumed) {













        if (mTracedResumedActivity != null) {













            Trace.asyncTraceEnd(TRACE_TAG_ACTIVITY_MANAGER,













                    constructResumedTraceName(mTracedResumedActivity.packageName), 0);













        }













        if (resumed != null) {













            Trace.asyncTraceBegin(TRACE_TAG_ACTIVITY_MANAGER,













                    constructResumedTraceName(resumed.packageName), 0);













        }













        mTracedResumedActivity = resumed;













    }

























    private String constructResumedTraceName(String packageName) {













        return "focused app: " + packageName;













    }



























    @Override















    public void setFocusedStack(int stackId) {















        enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "setFocusedStack()");










@@ -13073,6 +13098,7 @@ public class ActivityManagerService extends IActivityManager.Stub













            }















            mTopProcessState = ActivityManager.PROCESS_STATE_TOP_SLEEPING;















            mStackSupervisor.goingToSleepLocked();













            updateResumedAppTrace(null /* resumed */);















            updateOomAdjLocked();















        }















    }