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Commit decc2b71 authored by David Sehr's avatar David Sehr
Browse files

Add a threaded CPU-intensive benchmark to test 

In order to understand how simpleperf reports percentages from a whole
system, craft a benchmark set that runs a CPU-intensive thread a number
of times.

Bug: none
Test: run the app
Change-Id: I7c8748f9b5da89be20775a5af60b223d4673023b
parent 4c4650cb

startop/apps/test/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
android_app {

    name: "startop_test_app",

    srcs: [

        "src/CPUIntensive.java",

        "src/EmptyActivity.java",

        "src/LayoutInflationActivity.java",

        "src/ComplexLayoutInflationActivity.java",

startop/apps/test/src/CPUIntensive.java

0 → 100644
+67 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2019 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.

 */



/**

 *  A threaded CPU intensive class for use in benchmarks.

 */



package com.android.startop.test;



final class CPUIntensive {

    public static final int THREAD_COUNT = 8;

    public static final int ARRAY_SIZE = 30000;

    public static int[][] array = new int[THREAD_COUNT][ARRAY_SIZE];



    static class WorkerThread extends Thread {

        int mThreadNumber;

        WorkerThread(int number) {

            mThreadNumber = number;

        }

        public void run() {

            final int arrayLength = array[mThreadNumber].length;

            for (int i = 0; i < arrayLength; ++i) {

                array[mThreadNumber][i] = i * i;

            }

            for (int i = 0; i < arrayLength; ++i) {

                for (int j = 0; j < arrayLength; ++j) {

                    int swap = array[mThreadNumber][j];

                    array[mThreadNumber][j] = array[mThreadNumber][(j + i) % arrayLength];

                    array[mThreadNumber][(j + i) % arrayLength] = swap;

                }

            }

        }

    };



    public static void doSomeWork(int threadCount) {

        WorkerThread[] threads = new WorkerThread[threadCount];

        // Create the threads.

        for (int i = 0; i < threadCount; ++i) {

            threads[i] = new WorkerThread(i);

        }

        // Start the threads.

        for (int i = 0; i < threadCount; ++i) {

            threads[i].start();

        }

        // Join the threads.

        for (int i = 0; i < threadCount; ++i) {

            try {

                threads[i].join();

            } catch (Exception ex) {

            }

        }

    }

}

startop/apps/test/src/SystemServerBenchmarkActivity.java

+16 −4
Original line number Diff line number Diff line
@@ -26,15 +26,11 @@ import android.content.pm.PackageManager; 
import android.content.pm.PackageManager.NameNotFoundException;

import android.os.AsyncTask;

import android.os.Bundle;

import android.os.Trace;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.GridLayout;

import android.widget.TextView;



import java.util.Arrays;



class Benchmark {

    // Time limit to run benchmarks in seconds
@@ -107,6 +103,22 @@ public class SystemServerBenchmarkActivity extends Activity { 
        new Benchmark(benchmarkList, "Empty", () -> {

        });



        new Benchmark(benchmarkList, "CPU Intensive (1 thread)", () -> {

            CPUIntensive.doSomeWork(1);

        });



        new Benchmark(benchmarkList, "CPU Intensive (2 thread)", () -> {

            CPUIntensive.doSomeWork(2);

        });



        new Benchmark(benchmarkList, "CPU Intensive (4 thread)", () -> {

            CPUIntensive.doSomeWork(4);

        });



        new Benchmark(benchmarkList, "CPU Intensive (8 thread)", () -> {

            CPUIntensive.doSomeWork(8);

        });



        PackageManager pm = getPackageManager();

        new Benchmark(benchmarkList, "getInstalledApplications", () -> {

            pm.getInstalledApplications(PackageManager.MATCH_SYSTEM_ONLY);