| /* |
| * 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) { |
| } |
| } |
| } |
| } |
| |