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      1 /*
      2  * Copyright (C) 2016 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.perftests;
     18 
     19 import android.perftests.utils.BenchmarkState;
     20 import android.perftests.utils.PerfStatusReporter;
     21 import android.support.test.filters.LargeTest;
     22 import android.support.test.runner.AndroidJUnit4;
     23 
     24 import dalvik.annotation.optimization.FastNative;
     25 
     26 import org.junit.Rule;
     27 import org.junit.Test;
     28 import org.junit.runner.RunWith;
     29 
     30 import java.util.concurrent.TimeUnit;
     31 
     32 @RunWith(AndroidJUnit4.class)
     33 @LargeTest
     34 public class SystemPerfTest {
     35 
     36     static {
     37         System.loadLibrary("perftestscore_jni");
     38     }
     39 
     40     @Rule
     41     public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
     42 
     43     @Test
     44     public void testNanoTimePerf() {
     45         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     46         while (state.keepRunning()) {
     47             System.nanoTime();
     48         }
     49     }
     50 
     51     @Test
     52     public void testBenchmarkOverhead() {
     53         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     54         while (state.keepRunning()) {}
     55     }
     56 
     57     void spinBlock(long durationNs) {
     58         long start = System.nanoTime();
     59         while (System.nanoTime() - start < durationNs) {}
     60     }
     61 
     62     @Test
     63     public void testBenchmarkPauseResumeOverhead() {
     64         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     65         while (state.keepRunning()) {
     66             state.pauseTiming();
     67             spinBlock(TimeUnit.MICROSECONDS.toNanos(5));
     68             state.resumeTiming();
     69         }
     70     }
     71 
     72     @Test
     73     public void testJniArrayNoop() {
     74         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     75         final int[] data = new int[450];
     76         while (state.keepRunning()) {
     77             jintarrayArgumentNoop(data, data.length);
     78         }
     79     }
     80 
     81     @Test
     82     public void testJniArrayGetLength() {
     83         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     84         final int[] data = new int[450];
     85         while (state.keepRunning()) {
     86             jintarrayGetLength(data);
     87         }
     88     }
     89 
     90     @Test
     91     public void testJniArrayCriticalAccess() {
     92         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
     93         final int[] data = new int[450];
     94         while (state.keepRunning()) {
     95             jintarrayCriticalAccess(data, 50);
     96         }
     97     }
     98 
     99     @Test
    100     public void testJniArrayBasicAccess() {
    101         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
    102         final int[] data = new int[450];
    103         while (state.keepRunning()) {
    104             jintarrayBasicAccess(data, 50);
    105         }
    106     }
    107 
    108     @FastNative
    109     private static native void jintarrayArgumentNoop(int[] array, int length);
    110     @FastNative
    111     private static native int jintarrayGetLength(int[] array);
    112     @FastNative
    113     private static native int jintarrayCriticalAccess(int[] array, int index);
    114     @FastNative
    115     private static native int jintarrayBasicAccess(int[] array, int index);
    116 }
    117