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Commit 231d8697 authored by Rupesh Bansal's avatar Rupesh Bansal
Browse files

Adding perf testing for brightness and display state changes 

The intention is to leverage this test by tracking some internal perfetto
traces, and track the performance of
DisplayPowerController#updatePowerState function

Bug: 249463108
Test: atest DisplayPerfTest
Change-Id: Ia58a170e2b4ae42938a3df9f47baa79dc0866b20
parent 0a54f2f4

apct-tests/perftests/core/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ android_test { 
        "apct-perftests-resources-manager-apps",

        "apct-perftests-utils",

        "collector-device-lib",

        "compatibility-device-util-axt",

        "core-tests-support",

        "guava",

    ],

apct-tests/perftests/core/AndroidManifest.xml

+3 −1
Original line number Diff line number Diff line
@@ -13,7 +13,9 @@ 
    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />

    <uses-permission android:name="android.permission.INTERNET" />

    <uses-permission android:name="android.permission.VIBRATE" />



    <uses-permission android:name="android.permission.DEVICE_POWER" />

    <uses-permission android:name="android.permission.CONTROL_DISPLAY_BRIGHTNESS" />

    <uses-permission android:name="android.permission.WRITE_SETTINGS" />

    <application>

        <uses-library android:name="android.test.runner" />

        <profileable android:shell="true" />

apct-tests/perftests/core/src/android/os/DisplayPerfTest.java

0 → 100644
+84 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



package android.os;



import android.content.Context;

import android.hardware.display.DisplayManager;

import android.provider.Settings;

import android.view.Display;



import androidx.benchmark.BenchmarkState;

import androidx.benchmark.junit4.BenchmarkRule;

import androidx.test.platform.app.InstrumentationRegistry;

import androidx.test.runner.AndroidJUnit4;



import com.android.compatibility.common.util.PollingCheck;



import org.junit.Before;

import org.junit.Rule;

import org.junit.Test;

import org.junit.runner.RunWith;



@RunWith(AndroidJUnit4.class)

public final class DisplayPerfTest {

    private static final float DELTA = 0.001f;



    @Rule

    public final BenchmarkRule mBenchmarkRule = new BenchmarkRule();



    private DisplayManager mDisplayManager;

    private Context mContext;



    @Before

    public void setUp() {

        mContext = InstrumentationRegistry.getInstrumentation().getTargetContext();

        mDisplayManager = mContext.getSystemService(DisplayManager.class);

    }



    @Test

    public void testBrightnessChanges() throws Exception {

        final BenchmarkState state = mBenchmarkRule.getState();

        Settings.System.putInt(mContext.getContentResolver(),

                Settings.System.SCREEN_BRIGHTNESS_MODE,

                Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);

        SystemClock.sleep(20);

        float brightness = 0.3f;

        while (state.keepRunning()) {

            setAndWaitToChangeBrightness(brightness);

            brightness = toggleBrightness(brightness);

        }

    }



    private float toggleBrightness(float oldBrightness) {

        float[] brightnesses = new float[]{0.3f, 0.5f};

        if (oldBrightness == brightnesses[0]) {

            return brightnesses[1];

        }

        return brightnesses[0];

    }



    private void setAndWaitToChangeBrightness(float brightness) throws Exception {

        mDisplayManager.setBrightness(0, brightness);

        PollingCheck.check("Brightness is not set to the expected value", 500,

                () -> isInRange(mDisplayManager.getBrightness(Display.DEFAULT_DISPLAY), brightness,

                        DELTA));

    }



    private boolean isInRange(float value, float target, float delta) {

        return target - delta <= value && target + delta >= value;

    }

}