112 lines
3.7 KiB
Java
112 lines
3.7 KiB
Java
/*
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* Copyright (C) 2010 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 com.android.server;
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import android.content.Context;
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import android.os.Binder;
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import android.os.Environment;
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import android.os.FileUtils;
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import android.os.StatFs;
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import android.os.SystemClock;
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import java.io.File;
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import java.io.FileDescriptor;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintWriter;
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/**
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* This service exists only as a "dumpsys" target which reports
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* statistics about the status of the disk.
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*/
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public class DiskStatsService extends Binder {
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private final Context mContext;
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public DiskStatsService(Context context) {
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mContext = context;
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}
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@Override
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protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
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// This data is accessible to any app -- no permission check needed.
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// Run a quick-and-dirty performance test: write 512 bytes
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byte[] junk = new byte[512];
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for (int i = 0; i < junk.length; i++) junk[i] = (byte) i; // Write nonzero bytes
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File tmp = new File(Environment.getDataDirectory(), "system/perftest.tmp");
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FileOutputStream fos = null;
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IOException error = null;
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long before = SystemClock.uptimeMillis();
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try {
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fos = new FileOutputStream(tmp);
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fos.write(junk);
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} catch (IOException e) {
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error = e;
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} finally {
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try { if (fos != null) fos.close(); } catch (IOException e) {}
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}
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long after = SystemClock.uptimeMillis();
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if (tmp.exists()) tmp.delete();
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if (error != null) {
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pw.print("Test-Error: ");
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pw.println(error.toString());
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} else {
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pw.print("Latency: ");
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pw.print(after - before);
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pw.println("ms [512B Data Write]");
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}
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reportFreeSpace(Environment.getDataDirectory(), "Data", pw);
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reportFreeSpace(Environment.getDownloadCacheDirectory(), "Cache", pw);
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reportFreeSpace(new File("/system"), "System", pw);
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// TODO: Read /proc/yaffs and report interesting values;
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// add configurable (through args) performance test parameters.
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}
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private void reportFreeSpace(File path, String name, PrintWriter pw) {
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try {
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StatFs statfs = new StatFs(path.getPath());
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long bsize = statfs.getBlockSize();
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long avail = statfs.getAvailableBlocks();
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long total = statfs.getBlockCount();
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if (bsize <= 0 || total <= 0) {
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throw new IllegalArgumentException(
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"Invalid stat: bsize=" + bsize + " avail=" + avail + " total=" + total);
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}
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pw.print(name);
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pw.print("-Free: ");
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pw.print(avail * bsize / 1024);
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pw.print("K / ");
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pw.print(total * bsize / 1024);
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pw.print("K total = ");
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pw.print(avail * 100 / total);
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pw.println("% free");
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} catch (IllegalArgumentException e) {
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pw.print(name);
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pw.print("-Error: ");
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pw.println(e.toString());
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return;
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}
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}
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}
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