Dan Egnor | 621bc54 | 2010-03-25 16:20:14 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.os.Binder; |
| 21 | import android.os.Environment; |
Dan Egnor | 621bc54 | 2010-03-25 16:20:14 -0700 | [diff] [blame] | 22 | import android.os.StatFs; |
| 23 | import android.os.SystemClock; |
| 24 | |
| 25 | import java.io.File; |
| 26 | import java.io.FileDescriptor; |
| 27 | import java.io.FileOutputStream; |
| 28 | import java.io.IOException; |
| 29 | import java.io.PrintWriter; |
| 30 | |
| 31 | /** |
| 32 | * This service exists only as a "dumpsys" target which reports |
| 33 | * statistics about the status of the disk. |
| 34 | */ |
| 35 | public class DiskStatsService extends Binder { |
Jeff Sharkey | eb4cc492 | 2012-04-26 18:17:29 -0700 | [diff] [blame] | 36 | private static final String TAG = "DiskStatsService"; |
| 37 | |
Dan Egnor | 621bc54 | 2010-03-25 16:20:14 -0700 | [diff] [blame] | 38 | private final Context mContext; |
| 39 | |
| 40 | public DiskStatsService(Context context) { |
| 41 | mContext = context; |
| 42 | } |
| 43 | |
| 44 | @Override |
| 45 | protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
Jeff Sharkey | eb4cc492 | 2012-04-26 18:17:29 -0700 | [diff] [blame] | 46 | mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); |
Dan Egnor | 621bc54 | 2010-03-25 16:20:14 -0700 | [diff] [blame] | 47 | |
| 48 | // Run a quick-and-dirty performance test: write 512 bytes |
| 49 | byte[] junk = new byte[512]; |
| 50 | for (int i = 0; i < junk.length; i++) junk[i] = (byte) i; // Write nonzero bytes |
| 51 | |
| 52 | File tmp = new File(Environment.getDataDirectory(), "system/perftest.tmp"); |
| 53 | FileOutputStream fos = null; |
| 54 | IOException error = null; |
| 55 | |
| 56 | long before = SystemClock.uptimeMillis(); |
| 57 | try { |
| 58 | fos = new FileOutputStream(tmp); |
| 59 | fos.write(junk); |
| 60 | } catch (IOException e) { |
| 61 | error = e; |
| 62 | } finally { |
| 63 | try { if (fos != null) fos.close(); } catch (IOException e) {} |
| 64 | } |
| 65 | |
| 66 | long after = SystemClock.uptimeMillis(); |
| 67 | if (tmp.exists()) tmp.delete(); |
| 68 | |
| 69 | if (error != null) { |
| 70 | pw.print("Test-Error: "); |
| 71 | pw.println(error.toString()); |
| 72 | } else { |
| 73 | pw.print("Latency: "); |
| 74 | pw.print(after - before); |
| 75 | pw.println("ms [512B Data Write]"); |
| 76 | } |
| 77 | |
| 78 | reportFreeSpace(Environment.getDataDirectory(), "Data", pw); |
| 79 | reportFreeSpace(Environment.getDownloadCacheDirectory(), "Cache", pw); |
| 80 | reportFreeSpace(new File("/system"), "System", pw); |
| 81 | |
| 82 | // TODO: Read /proc/yaffs and report interesting values; |
| 83 | // add configurable (through args) performance test parameters. |
| 84 | } |
| 85 | |
| 86 | private void reportFreeSpace(File path, String name, PrintWriter pw) { |
| 87 | try { |
| 88 | StatFs statfs = new StatFs(path.getPath()); |
| 89 | long bsize = statfs.getBlockSize(); |
| 90 | long avail = statfs.getAvailableBlocks(); |
| 91 | long total = statfs.getBlockCount(); |
| 92 | if (bsize <= 0 || total <= 0) { |
| 93 | throw new IllegalArgumentException( |
| 94 | "Invalid stat: bsize=" + bsize + " avail=" + avail + " total=" + total); |
| 95 | } |
| 96 | |
| 97 | pw.print(name); |
| 98 | pw.print("-Free: "); |
| 99 | pw.print(avail * bsize / 1024); |
| 100 | pw.print("K / "); |
| 101 | pw.print(total * bsize / 1024); |
| 102 | pw.print("K total = "); |
| 103 | pw.print(avail * 100 / total); |
| 104 | pw.println("% free"); |
| 105 | } catch (IllegalArgumentException e) { |
| 106 | pw.print(name); |
| 107 | pw.print("-Error: "); |
| 108 | pw.println(e.toString()); |
| 109 | return; |
| 110 | } |
| 111 | } |
| 112 | } |