9dbde7b09f
Implement set of low-level tests to measure graphics performance. Design and test result: https://docs.google.com/a/google.com/document/d/1LYlUxjjmC2JBulAIIO8UVfvjeHWEALzgyUzqMMzwiGE/edit?usp=sharing Change-Id: I48efbce5dcdac1b8caa2cd332777ce0b06d40ed2
72 lines
2.2 KiB
Java
72 lines
2.2 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.surfacecomposition;
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import android.util.Log;
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/**
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* This task will simulate CPU activity by consuming memory bandwidth from the system.
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* Note: On most system the CPU and GPU will share the same memory.
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*/
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public class MemoryAccessTask {
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private final static String TAG = "MemoryAccessTask";
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private final static int BUFFER_SIZE = 32 * 1024 * 1024;
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private final static int BUFFER_STEP = 256;
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private boolean mStopRequested;
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private WorkThread mThread;
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private final Object mLock = new Object();
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public class WorkThread extends Thread {
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public void run() {
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byte[] memory = new byte[BUFFER_SIZE];
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while (true) {
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synchronized (mLock) {
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if (mStopRequested) {
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break;
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}
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}
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long result = 0;
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for (int index = 0; index < BUFFER_SIZE; index += BUFFER_STEP) {
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result += ++memory[index];
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}
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Log.v(TAG, "Processing...:" + result);
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}
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}
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}
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public void start() {
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if (mThread != null) {
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throw new RuntimeException("Work thread is already started");
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}
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mStopRequested = false;
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mThread = new WorkThread();
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mThread.start();
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}
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public void stop() {
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if (mThread != null) {
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synchronized (mLock) {
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mStopRequested = true;
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}
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try {
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mThread.join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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}
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