Andres Morales | 910beb8 | 2016-02-02 16:19:40 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 android.view; |
| 18 | |
| 19 | import android.annotation.IntDef; |
| 20 | import android.view.Window; |
| 21 | |
| 22 | import java.lang.annotation.Retention; |
| 23 | import java.lang.annotation.RetentionPolicy; |
| 24 | |
| 25 | /** |
| 26 | * Class containing timing data for various milestones in a frame |
| 27 | * lifecycle reported by the rendering subsystem. |
| 28 | * <p> |
| 29 | * Supported metrics can be queried via their corresponding identifier. |
| 30 | * </p> |
| 31 | */ |
| 32 | public final class FrameMetrics { |
| 33 | |
| 34 | /** |
| 35 | * Metric identifier for unknown delay. |
| 36 | * <p> |
| 37 | * Represents the number of nanoseconds elapsed waiting for the |
| 38 | * UI thread to become responsive and process the frame. This |
| 39 | * should be 0 most of the time. |
| 40 | * </p> |
| 41 | */ |
| 42 | public static final int UNKNOWN_DELAY_DURATION = 0; |
| 43 | |
| 44 | /** |
| 45 | * Metric identifier for input handling duration. |
| 46 | * <p> |
| 47 | * Represents the number of nanoseconds elapsed issuing |
| 48 | * input handling callbacks. |
| 49 | * </p> |
| 50 | */ |
| 51 | public static final int INPUT_HANDLING_DURATION = 1; |
| 52 | |
| 53 | /** |
| 54 | * Metric identifier for animation callback duration. |
| 55 | * <p> |
| 56 | * Represents the number of nanoseconds elapsed issuing |
| 57 | * animation callbacks. |
| 58 | * </p> |
| 59 | */ |
| 60 | public static final int ANIMATION_DURATION = 2; |
| 61 | |
| 62 | /** |
| 63 | * Metric identifier for layout/measure duration. |
| 64 | * <p> |
| 65 | * Represents the number of nanoseconds elapsed measuring |
| 66 | * and laying out the invalidated pieces of the view hierarchy. |
| 67 | * </p> |
| 68 | */ |
| 69 | public static final int LAYOUT_MEASURE_DURATION = 3; |
| 70 | /** |
| 71 | * Metric identifier for draw duration. |
| 72 | * <p> |
| 73 | * Represents the number of nanoseconds elapsed computing |
| 74 | * DisplayLists for transformations applied to the view |
| 75 | * hierarchy. |
| 76 | * </p> |
| 77 | */ |
| 78 | public static final int DRAW_DURATION = 4; |
| 79 | |
| 80 | /** |
| 81 | * Metric identifier for sync duration. |
| 82 | * <p> |
| 83 | * Represents the number of nanoseconds elapsed |
| 84 | * synchronizing the computed display lists with the render |
| 85 | * thread. |
| 86 | * </p> |
| 87 | */ |
| 88 | public static final int SYNC_DURATION = 5; |
| 89 | |
| 90 | /** |
| 91 | * Metric identifier for command issue duration. |
| 92 | * <p> |
| 93 | * Represents the number of nanoseconds elapsed |
| 94 | * issuing draw commands to the GPU. |
| 95 | * </p> |
| 96 | */ |
| 97 | public static final int COMMAND_ISSUE_DURATION = 6; |
| 98 | |
| 99 | /** |
| 100 | * Metric identifier for swap buffers duration. |
| 101 | * <p> |
| 102 | * Represents the number of nanoseconds elapsed issuing |
| 103 | * the frame buffer for this frame to the display |
| 104 | * subsystem. |
| 105 | * </p> |
| 106 | */ |
| 107 | public static final int SWAP_BUFFERS_DURATION = 7; |
| 108 | |
| 109 | /** |
| 110 | * Metric identifier for total frame duration. |
| 111 | * <p> |
| 112 | * Represents the total time in nanoseconds this frame took to render |
| 113 | * and be issued to the display subsystem. |
| 114 | * </p> |
| 115 | * <p> |
| 116 | * Equal to the sum of the values of all other time-valued metric |
| 117 | * identifiers. |
| 118 | * </p> |
| 119 | */ |
| 120 | public static final int TOTAL_DURATION = 8; |
| 121 | |
| 122 | /** |
| 123 | * Metric identifier for a boolean value determining whether this frame was |
| 124 | * the first to draw in a new Window layout. |
| 125 | * <p> |
| 126 | * {@link #getMetric(int)} will return 0 for false, 1 for true. |
| 127 | * </p> |
| 128 | * <p> |
| 129 | * First draw frames are expected to be slow and should usually be exempt |
| 130 | * from display jank calculations as they do not cause skips in animations |
| 131 | * and are usually hidden by window animations or other tricks. |
| 132 | * </p> |
| 133 | */ |
| 134 | public static final int FIRST_DRAW_FRAME = 9; |
| 135 | |
| 136 | private static final int FRAME_INFO_FLAG_FIRST_DRAW = 1 << 0; |
| 137 | |
| 138 | /** |
| 139 | * Identifiers for metrics available for each frame. |
| 140 | * |
| 141 | * {@see {@link #getMetric(int)}} |
| 142 | * @hide |
| 143 | */ |
| 144 | @IntDef({ |
| 145 | UNKNOWN_DELAY_DURATION, |
| 146 | INPUT_HANDLING_DURATION, |
| 147 | ANIMATION_DURATION, |
| 148 | LAYOUT_MEASURE_DURATION, |
| 149 | DRAW_DURATION, |
| 150 | SYNC_DURATION, |
| 151 | COMMAND_ISSUE_DURATION, |
| 152 | SWAP_BUFFERS_DURATION, |
| 153 | TOTAL_DURATION, |
| 154 | FIRST_DRAW_FRAME, |
| 155 | }) |
| 156 | @Retention(RetentionPolicy.SOURCE) |
| 157 | public @interface Metric {} |
| 158 | |
| 159 | /** |
| 160 | * Timestamp indices for frame milestones. |
| 161 | * |
| 162 | * May change from release to release. |
| 163 | * |
| 164 | * Must be kept in sync with frameworks/base/libs/hwui/FrameInfo.h. |
| 165 | * |
| 166 | * @hide |
| 167 | */ |
| 168 | @IntDef ({ |
| 169 | Index.FLAGS, |
| 170 | Index.INTENDED_VSYNC, |
| 171 | Index.VSYNC, |
| 172 | Index.OLDEST_INPUT_EVENT, |
| 173 | Index.NEWEST_INPUT_EVENT, |
| 174 | Index.HANDLE_INPUT_START, |
| 175 | Index.ANIMATION_START, |
| 176 | Index.PERFORM_TRAVERSALS_START, |
| 177 | Index.DRAW_START, |
| 178 | Index.SYNC_QUEUED, |
| 179 | Index.SYNC_START, |
| 180 | Index.ISSUE_DRAW_COMMANDS_START, |
| 181 | Index.SWAP_BUFFERS, |
| 182 | Index.FRAME_COMPLETED, |
| 183 | }) |
| 184 | @Retention(RetentionPolicy.SOURCE) |
| 185 | private @interface Index { |
| 186 | int FLAGS = 0; |
| 187 | int INTENDED_VSYNC = 1; |
| 188 | int VSYNC = 2; |
| 189 | int OLDEST_INPUT_EVENT = 3; |
| 190 | int NEWEST_INPUT_EVENT = 4; |
| 191 | int HANDLE_INPUT_START = 5; |
| 192 | int ANIMATION_START = 6; |
| 193 | int PERFORM_TRAVERSALS_START = 7; |
| 194 | int DRAW_START = 8; |
| 195 | int SYNC_QUEUED = 9; |
| 196 | int SYNC_START = 10; |
| 197 | int ISSUE_DRAW_COMMANDS_START = 11; |
| 198 | int SWAP_BUFFERS = 12; |
| 199 | int FRAME_COMPLETED = 13; |
| 200 | |
| 201 | int FRAME_STATS_COUNT = 14; // must always be last |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * Bucket endpoints for each Metric defined above. |
| 206 | * |
| 207 | * Each defined metric *must* have a corresponding entry |
| 208 | * in this list. |
| 209 | */ |
| 210 | private static final int[] DURATIONS = new int[] { |
| 211 | // UNKNOWN_DELAY |
| 212 | Index.INTENDED_VSYNC, Index.HANDLE_INPUT_START, |
| 213 | // INPUT_HANDLING |
| 214 | Index.HANDLE_INPUT_START, Index.ANIMATION_START, |
| 215 | // ANIMATION |
| 216 | Index.ANIMATION_START, Index.PERFORM_TRAVERSALS_START, |
| 217 | // LAYOUT_MEASURE |
| 218 | Index.PERFORM_TRAVERSALS_START, Index.DRAW_START, |
| 219 | // DRAW |
| 220 | Index.DRAW_START, Index.SYNC_QUEUED, |
| 221 | // SYNC |
| 222 | Index.SYNC_START, Index.ISSUE_DRAW_COMMANDS_START, |
| 223 | // COMMAND_ISSUE |
| 224 | Index.ISSUE_DRAW_COMMANDS_START, Index.SWAP_BUFFERS, |
| 225 | // SWAP_BUFFERS |
| 226 | Index.SWAP_BUFFERS, Index.FRAME_COMPLETED, |
| 227 | // TOTAL_DURATION |
| 228 | Index.INTENDED_VSYNC, Index.FRAME_COMPLETED, |
| 229 | }; |
| 230 | |
| 231 | /* package */ final long[] mTimingData; |
| 232 | |
| 233 | /** |
| 234 | * Constructs a FrameMetrics object as a copy. |
| 235 | * <p> |
| 236 | * Use this method to copy out metrics reported by |
| 237 | * {@link Window.FrameMetricsListener#onMetricsAvailable(Window, FrameMetrics, int)} |
| 238 | * </p> |
| 239 | * @param other the FrameMetrics object to copy. |
| 240 | */ |
| 241 | public FrameMetrics(FrameMetrics other) { |
| 242 | mTimingData = new long[Index.FRAME_STATS_COUNT]; |
| 243 | System.arraycopy(other.mTimingData, 0, mTimingData, 0, mTimingData.length); |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * @hide |
| 248 | */ |
| 249 | FrameMetrics() { |
| 250 | mTimingData = new long[Index.FRAME_STATS_COUNT]; |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * Retrieves the value associated with Metric identifier {@code id} |
| 255 | * for this frame. |
| 256 | * <p> |
| 257 | * Boolean metrics are represented in [0,1], with 0 corresponding to |
| 258 | * false, and 1 corresponding to true. |
| 259 | * </p> |
| 260 | * @param id the metric to retrieve |
| 261 | * @return the value of the metric or -1 if it is not available. |
| 262 | */ |
| 263 | public long getMetric(@Metric int id) { |
| 264 | if (id < UNKNOWN_DELAY_DURATION || id > FIRST_DRAW_FRAME) { |
| 265 | return -1; |
| 266 | } |
| 267 | |
| 268 | if (mTimingData == null) { |
| 269 | return -1; |
| 270 | } |
| 271 | |
| 272 | if (id == FIRST_DRAW_FRAME) { |
| 273 | return (mTimingData[Index.FLAGS] & FRAME_INFO_FLAG_FIRST_DRAW) != 0 ? 1 : 0; |
| 274 | } |
| 275 | |
| 276 | int durationsIdx = 2 * id; |
| 277 | return mTimingData[DURATIONS[durationsIdx + 1]] |
| 278 | - mTimingData[DURATIONS[durationsIdx]]; |
| 279 | } |
| 280 | } |
| 281 | |