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/*
* 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;
import android.app.Activity;
public class CPUIntensiveBenchmarks {
public static final int ARRAY_SIZE = 30000;
public static int[][] mArray;
static class WorkerThread extends Thread {
int mThreadNumber;
WorkerThread(int number) {
mThreadNumber = number;
}
public void run() {
final int arrayLength = mArray[mThreadNumber].length;
for (int i = 0; i < arrayLength; ++i) {
mArray[mThreadNumber][i] = i * i;
}
for (int i = 0; i < arrayLength; ++i) {
for (int j = 0; j < arrayLength; ++j) {
int swap = mArray[mThreadNumber][j];
mArray[mThreadNumber][j] = mArray[mThreadNumber][(j + i) % arrayLength];
mArray[mThreadNumber][(j + i) % arrayLength] = swap;
}
}
}
};
static void doSomeWork(int threadCount) {
mArray = new int[threadCount][ARRAY_SIZE];
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) {
}
}
}
// Time limit to run benchmarks in seconds
public static final int TIME_LIMIT = 5;
static void initializeBenchmarks(Activity parent, BenchmarkRunner benchmarks) {
benchmarks.addBenchmark("Use 1 thread", () -> {
doSomeWork(1);
});
benchmarks.addBenchmark("Use 2 threads", () -> {
doSomeWork(2);
});
benchmarks.addBenchmark("Use 4 threads", () -> {
doSomeWork(4);
});
benchmarks.addBenchmark("Use 8 threads", () -> {
doSomeWork(8);
});
benchmarks.addBenchmark("Use 16 threads", () -> {
doSomeWork(16);
});
}
}
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