1 /* 2 * Copyright (C) 2017 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 package android.car.storagemonitoring; 17 18 import android.annotation.SystemApi; 19 20 /** 21 * Record of data as extracted from /proc/uid_io/stats 22 * 23 * @hide 24 */ 25 @SystemApi 26 public final class UidIoRecord { 27 28 public final int uid; 29 30 public final long foreground_rchar; 31 public final long foreground_wchar; 32 public final long foreground_read_bytes; 33 public final long foreground_write_bytes; 34 public final long foreground_fsync; 35 36 public final long background_rchar; 37 public final long background_wchar; 38 public final long background_read_bytes; 39 public final long background_write_bytes; 40 public final long background_fsync; 41 42 public UidIoRecord(int uid, 43 long foreground_rchar, 44 long foreground_wchar, 45 long foreground_read_bytes, 46 long foreground_write_bytes, 47 long foreground_fsync, 48 long background_rchar, 49 long background_wchar, 50 long background_read_bytes, 51 long background_write_bytes, 52 long background_fsync) { 53 this.uid = uid; 54 55 this.foreground_rchar = foreground_rchar; 56 this.foreground_wchar = foreground_wchar; 57 this.foreground_read_bytes = foreground_read_bytes; 58 this.foreground_write_bytes = foreground_write_bytes; 59 this.foreground_fsync = foreground_fsync; 60 61 this.background_rchar = background_rchar; 62 this.background_wchar = background_wchar; 63 this.background_read_bytes = background_read_bytes; 64 this.background_write_bytes = background_write_bytes; 65 this.background_fsync = background_fsync; 66 } 67 68 /** @hide */ 69 public UidIoRecord delta(IoStatsEntry other) { 70 if (uid != other.uid) { 71 throw new IllegalArgumentException("cannot calculate delta between different user IDs"); 72 } 73 74 return new UidIoRecord(uid, 75 foreground_rchar - other.foreground.bytesRead, 76 foreground_wchar - other.foreground.bytesWritten, 77 foreground_read_bytes - other.foreground.bytesReadFromStorage, 78 foreground_write_bytes - other.foreground.bytesWrittenToStorage, 79 foreground_fsync - other.foreground.fsyncCalls, 80 background_rchar - other.background.bytesRead, 81 background_wchar - other.background.bytesWritten, 82 background_read_bytes - other.background.bytesReadFromStorage, 83 background_write_bytes - other.background.bytesWrittenToStorage, 84 background_fsync - other.background.fsyncCalls); 85 } 86 87 /** @hide */ 88 public UidIoRecord delta(UidIoRecord other) { 89 if (uid != other.uid) { 90 throw new IllegalArgumentException("cannot calculate delta between different user IDs"); 91 } 92 93 return new UidIoRecord(uid, 94 foreground_rchar - other.foreground_rchar, 95 foreground_wchar - other.foreground_wchar, 96 foreground_read_bytes - other.foreground_read_bytes, 97 foreground_write_bytes - other.foreground_write_bytes, 98 foreground_fsync - other.foreground_fsync, 99 background_rchar - other.background_rchar, 100 background_wchar - other.background_wchar, 101 background_read_bytes - other.background_read_bytes, 102 background_write_bytes - other.background_write_bytes, 103 background_fsync - other.background_fsync); 104 } 105 } 106
