blob: 8ef974a7a8721ce525b8608f7a37a29cbb84dabf [file] [log] [blame]
/*
* Copyright (C) 2010 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.
*/
package com.android.server;
import android.content.Context;
import android.os.Binder;
import android.os.Environment;
import android.os.FileUtils;
import android.os.StatFs;
import android.os.SystemClock;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
/**
* This service exists only as a "dumpsys" target which reports
* statistics about the status of the disk.
*/
public class DiskStatsService extends Binder {
private final Context mContext;
public DiskStatsService(Context context) {
mContext = context;
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
// This data is accessible to any app -- no permission check needed.
// Run a quick-and-dirty performance test: write 512 bytes
byte[] junk = new byte[512];
for (int i = 0; i < junk.length; i++) junk[i] = (byte) i; // Write nonzero bytes
File tmp = new File(Environment.getDataDirectory(), "system/perftest.tmp");
FileOutputStream fos = null;
IOException error = null;
long before = SystemClock.uptimeMillis();
try {
fos = new FileOutputStream(tmp);
fos.write(junk);
} catch (IOException e) {
error = e;
} finally {
try { if (fos != null) fos.close(); } catch (IOException e) {}
}
long after = SystemClock.uptimeMillis();
if (tmp.exists()) tmp.delete();
if (error != null) {
pw.print("Test-Error: ");
pw.println(error.toString());
} else {
pw.print("Latency: ");
pw.print(after - before);
pw.println("ms [512B Data Write]");
}
reportFreeSpace(Environment.getDataDirectory(), "Data", pw);
reportFreeSpace(Environment.getDownloadCacheDirectory(), "Cache", pw);
reportFreeSpace(new File("/system"), "System", pw);
// TODO: Read /proc/yaffs and report interesting values;
// add configurable (through args) performance test parameters.
}
private void reportFreeSpace(File path, String name, PrintWriter pw) {
try {
StatFs statfs = new StatFs(path.getPath());
long bsize = statfs.getBlockSize();
long avail = statfs.getAvailableBlocks();
long total = statfs.getBlockCount();
if (bsize <= 0 || total <= 0) {
throw new IllegalArgumentException(
"Invalid stat: bsize=" + bsize + " avail=" + avail + " total=" + total);
}
pw.print(name);
pw.print("-Free: ");
pw.print(avail * bsize / 1024);
pw.print("K / ");
pw.print(total * bsize / 1024);
pw.print("K total = ");
pw.print(avail * 100 / total);
pw.println("% free");
} catch (IllegalArgumentException e) {
pw.print(name);
pw.print("-Error: ");
pw.println(e.toString());
return;
}
}
}