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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.os;
     18 
     19 
     20 import android.perftests.utils.BenchmarkState;
     21 import android.perftests.utils.PerfStatusReporter;
     22 
     23 import androidx.test.filters.LargeTest;
     24 import androidx.test.runner.AndroidJUnit4;
     25 
     26 import com.android.internal.os.CachedDeviceState;
     27 import com.android.internal.os.LooperStats;
     28 
     29 import org.junit.After;
     30 import org.junit.Before;
     31 import org.junit.Rule;
     32 import org.junit.Test;
     33 import org.junit.runner.RunWith;
     34 
     35 /**
     36  * Performance tests for {@link LooperStats}.
     37  */
     38 @RunWith(AndroidJUnit4.class)
     39 @LargeTest
     40 public class LooperStatsPerfTest {
     41     private static final int DISTINCT_MESSAGE_COUNT = 1000;
     42 
     43     @Rule
     44     public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
     45     private LooperStats mStats;
     46     private CachedDeviceState mDeviceState;
     47     private HandlerThread mThread;
     48     private Message[] mMessages = new Message[DISTINCT_MESSAGE_COUNT];
     49 
     50     @Before
     51     public void setUp() {
     52         mStats = new LooperStats(1, DISTINCT_MESSAGE_COUNT - 1);
     53         mDeviceState = new CachedDeviceState(false, false);
     54         mStats.setDeviceState(mDeviceState.getReadonlyClient());
     55         // The tests are all single-threaded. HandlerThread is created to allow creating Handlers.
     56         mThread = new HandlerThread("UnusedThread");
     57         mThread.start();
     58         for (int i = 0; i < DISTINCT_MESSAGE_COUNT; i++) {
     59             mMessages[i] = mThread.getThreadHandler().obtainMessage(i);
     60         }
     61     }
     62 
     63     @After
     64     public void tearDown() {
     65         mThread.quit();
     66     }
     67 
     68     @Test
     69     public void timeHundredPercentSampling() {
     70         mStats.setSamplingInterval(1);
     71         runScenario();
     72     }
     73 
     74     @Test
     75     public void timeOnePercentSampling() {
     76         mStats.setSamplingInterval(100);
     77         runScenario();
     78     }
     79 
     80     @Test
     81     public void timeCollectionDisabled() {
     82         // We do not collect data on charger.
     83         mDeviceState.setCharging(true);
     84         runScenario();
     85     }
     86 
     87     private void runScenario() {
     88         final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     89         while (state.keepRunning()) {
     90             for (int i = 0; i < DISTINCT_MESSAGE_COUNT; i++) {
     91                 Object token = mStats.messageDispatchStarting();
     92                 mStats.messageDispatched(token, mMessages[i]);
     93             }
     94         }
     95     }
     96 }
     97