Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 | #define ATRACE_TAG ATRACE_TAG_GRAPHICS |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 18 | //#define LOG_NDEBUG 0 |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 19 | |
| 20 | // This is needed for stdint.h to define INT64_MAX in C++ |
| 21 | #define __STDC_LIMIT_MACROS |
| 22 | |
| 23 | #include <math.h> |
| 24 | |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 25 | #include <algorithm> |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 26 | |
Mark Salyzyn | 7823e12 | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 27 | #include <log/log.h> |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 28 | #include <utils/String8.h> |
| 29 | #include <utils/Thread.h> |
| 30 | #include <utils/Trace.h> |
| 31 | #include <utils/Vector.h> |
| 32 | |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 33 | #include <ui/FenceTime.h> |
Mark Salyzyn | a5e161b | 2016-09-29 08:08:05 -0700 | [diff] [blame] | 34 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 35 | #include "DispSync.h" |
| 36 | #include "EventLog/EventLog.h" |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 37 | #include "SurfaceFlinger.h" |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 38 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 39 | using std::max; |
| 40 | using std::min; |
| 41 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 42 | namespace android { |
| 43 | |
| 44 | // Setting this to true enables verbose tracing that can be used to debug |
| 45 | // vsync event model or phase issues. |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 46 | static const bool kTraceDetailedInfo = false; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 47 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 48 | // Setting this to true adds a zero-phase tracer for correlating with hardware |
| 49 | // vsync events |
| 50 | static const bool kEnableZeroPhaseTracer = false; |
| 51 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 52 | // This is the threshold used to determine when hardware vsync events are |
| 53 | // needed to re-synchronize the software vsync model with the hardware. The |
| 54 | // error metric used is the mean of the squared difference between each |
| 55 | // present time and the nearest software-predicted vsync. |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 56 | static const nsecs_t kErrorThreshold = 160000000000; // 400 usec squared |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 57 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 58 | #undef LOG_TAG |
| 59 | #define LOG_TAG "DispSyncThread" |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 60 | class DispSyncThread : public Thread { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 61 | public: |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 62 | explicit DispSyncThread(const char* name) |
| 63 | : mName(name), |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 64 | mStop(false), |
| 65 | mPeriod(0), |
| 66 | mPhase(0), |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 67 | mReferenceTime(0), |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 68 | mWakeupLatency(0), |
| 69 | mFrameNumber(0) {} |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 70 | |
| 71 | virtual ~DispSyncThread() {} |
| 72 | |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 73 | void updateModel(nsecs_t period, nsecs_t phase, nsecs_t referenceTime) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 74 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 75 | Mutex::Autolock lock(mMutex); |
| 76 | mPeriod = period; |
| 77 | mPhase = phase; |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 78 | mReferenceTime = referenceTime; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 79 | ALOGV("[%s] updateModel: mPeriod = %" PRId64 ", mPhase = %" PRId64 |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 80 | " mReferenceTime = %" PRId64, |
| 81 | mName, ns2us(mPeriod), ns2us(mPhase), ns2us(mReferenceTime)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 82 | mCond.signal(); |
| 83 | } |
| 84 | |
| 85 | void stop() { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 86 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 87 | Mutex::Autolock lock(mMutex); |
| 88 | mStop = true; |
| 89 | mCond.signal(); |
| 90 | } |
| 91 | |
| 92 | virtual bool threadLoop() { |
| 93 | status_t err; |
| 94 | nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 95 | |
| 96 | while (true) { |
| 97 | Vector<CallbackInvocation> callbackInvocations; |
| 98 | |
| 99 | nsecs_t targetTime = 0; |
| 100 | |
| 101 | { // Scope for lock |
| 102 | Mutex::Autolock lock(mMutex); |
| 103 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 104 | if (kTraceDetailedInfo) { |
| 105 | ATRACE_INT64("DispSync:Frame", mFrameNumber); |
| 106 | } |
| 107 | ALOGV("[%s] Frame %" PRId64, mName, mFrameNumber); |
| 108 | ++mFrameNumber; |
| 109 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 110 | if (mStop) { |
| 111 | return false; |
| 112 | } |
| 113 | |
| 114 | if (mPeriod == 0) { |
| 115 | err = mCond.wait(mMutex); |
| 116 | if (err != NO_ERROR) { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 117 | ALOGE("error waiting for new events: %s (%d)", strerror(-err), err); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 118 | return false; |
| 119 | } |
| 120 | continue; |
| 121 | } |
| 122 | |
Dan Stoza | 8f8374d | 2016-04-19 10:03:46 -0700 | [diff] [blame] | 123 | targetTime = computeNextEventTimeLocked(now); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 124 | |
| 125 | bool isWakeup = false; |
| 126 | |
| 127 | if (now < targetTime) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 128 | if (kTraceDetailedInfo) ATRACE_NAME("DispSync waiting"); |
Dan Stoza | 8f8374d | 2016-04-19 10:03:46 -0700 | [diff] [blame] | 129 | |
| 130 | if (targetTime == INT64_MAX) { |
| 131 | ALOGV("[%s] Waiting forever", mName); |
| 132 | err = mCond.wait(mMutex); |
| 133 | } else { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 134 | ALOGV("[%s] Waiting until %" PRId64, mName, ns2us(targetTime)); |
Dan Stoza | 8f8374d | 2016-04-19 10:03:46 -0700 | [diff] [blame] | 135 | err = mCond.waitRelative(mMutex, targetTime - now); |
| 136 | } |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 137 | |
| 138 | if (err == TIMED_OUT) { |
| 139 | isWakeup = true; |
| 140 | } else if (err != NO_ERROR) { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 141 | ALOGE("error waiting for next event: %s (%d)", strerror(-err), err); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 142 | return false; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | now = systemTime(SYSTEM_TIME_MONOTONIC); |
| 147 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 148 | // Don't correct by more than 1.5 ms |
| 149 | static const nsecs_t kMaxWakeupLatency = us2ns(1500); |
| 150 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 151 | if (isWakeup) { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 152 | mWakeupLatency = ((mWakeupLatency * 63) + (now - targetTime)) / 64; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 153 | mWakeupLatency = min(mWakeupLatency, kMaxWakeupLatency); |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 154 | if (kTraceDetailedInfo) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 155 | ATRACE_INT64("DispSync:WakeupLat", now - targetTime); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 156 | ATRACE_INT64("DispSync:AvgWakeupLat", mWakeupLatency); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | callbackInvocations = gatherCallbackInvocationsLocked(now); |
| 161 | } |
| 162 | |
| 163 | if (callbackInvocations.size() > 0) { |
Andy McFadden | 645b1f7 | 2014-06-10 14:43:32 -0700 | [diff] [blame] | 164 | fireCallbackInvocations(callbackInvocations); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 165 | } |
| 166 | } |
| 167 | |
| 168 | return false; |
| 169 | } |
| 170 | |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 171 | status_t addEventListener(const char* name, nsecs_t phase, DispSync::Callback* callback) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 172 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 173 | Mutex::Autolock lock(mMutex); |
| 174 | |
| 175 | for (size_t i = 0; i < mEventListeners.size(); i++) { |
| 176 | if (mEventListeners[i].mCallback == callback) { |
| 177 | return BAD_VALUE; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | EventListener listener; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 182 | listener.mName = name; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 183 | listener.mPhase = phase; |
| 184 | listener.mCallback = callback; |
Jamie Gennis | 629b987 | 2013-10-29 13:36:12 -0700 | [diff] [blame] | 185 | |
| 186 | // We want to allow the firstmost future event to fire without |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 187 | // allowing any past events to fire |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 188 | listener.mLastEventTime = systemTime() - mPeriod / 2 + mPhase - mWakeupLatency; |
Jamie Gennis | 629b987 | 2013-10-29 13:36:12 -0700 | [diff] [blame] | 189 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 190 | mEventListeners.push(listener); |
| 191 | |
| 192 | mCond.signal(); |
| 193 | |
| 194 | return NO_ERROR; |
| 195 | } |
| 196 | |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 197 | status_t removeEventListener(DispSync::Callback* callback) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 198 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 199 | Mutex::Autolock lock(mMutex); |
| 200 | |
| 201 | for (size_t i = 0; i < mEventListeners.size(); i++) { |
| 202 | if (mEventListeners[i].mCallback == callback) { |
| 203 | mEventListeners.removeAt(i); |
| 204 | mCond.signal(); |
| 205 | return NO_ERROR; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | return BAD_VALUE; |
| 210 | } |
| 211 | |
Dan Stoza | 84d619e | 2018-03-28 17:07:36 -0700 | [diff] [blame] | 212 | status_t changePhaseOffset(DispSync::Callback* callback, nsecs_t phase) { |
| 213 | if (kTraceDetailedInfo) ATRACE_CALL(); |
| 214 | Mutex::Autolock lock(mMutex); |
| 215 | |
| 216 | for (size_t i = 0; i < mEventListeners.size(); i++) { |
| 217 | if (mEventListeners[i].mCallback == callback) { |
| 218 | EventListener& listener = mEventListeners.editItemAt(i); |
| 219 | const nsecs_t oldPhase = listener.mPhase; |
| 220 | listener.mPhase = phase; |
| 221 | |
| 222 | // Pretend that the last time this event was handled at the same frame but with the |
| 223 | // new offset to allow for a seamless offset change without double-firing or |
| 224 | // skipping. |
Jorim Jaggi | 22ec38b | 2018-06-19 15:57:08 +0200 | [diff] [blame] | 225 | nsecs_t diff = oldPhase - phase; |
| 226 | if (diff > mPeriod / 2) { |
| 227 | diff -= mPeriod; |
| 228 | } else if (diff < -mPeriod / 2) { |
| 229 | diff += mPeriod; |
| 230 | } |
| 231 | listener.mLastEventTime -= diff; |
Dan Stoza | 84d619e | 2018-03-28 17:07:36 -0700 | [diff] [blame] | 232 | mCond.signal(); |
| 233 | return NO_ERROR; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | return BAD_VALUE; |
| 238 | } |
| 239 | |
Fabien Sanglard | cbf153b | 2017-03-10 17:57:12 -0800 | [diff] [blame] | 240 | // This method is only here to handle the !SurfaceFlinger::hasSyncFramework |
| 241 | // case. |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 242 | bool hasAnyEventListeners() { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 243 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 244 | Mutex::Autolock lock(mMutex); |
| 245 | return !mEventListeners.empty(); |
| 246 | } |
| 247 | |
| 248 | private: |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 249 | struct EventListener { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 250 | const char* mName; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 251 | nsecs_t mPhase; |
| 252 | nsecs_t mLastEventTime; |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 253 | DispSync::Callback* mCallback; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 254 | }; |
| 255 | |
| 256 | struct CallbackInvocation { |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 257 | DispSync::Callback* mCallback; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 258 | nsecs_t mEventTime; |
| 259 | }; |
| 260 | |
| 261 | nsecs_t computeNextEventTimeLocked(nsecs_t now) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 262 | if (kTraceDetailedInfo) ATRACE_CALL(); |
| 263 | ALOGV("[%s] computeNextEventTimeLocked", mName); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 264 | nsecs_t nextEventTime = INT64_MAX; |
| 265 | for (size_t i = 0; i < mEventListeners.size(); i++) { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 266 | nsecs_t t = computeListenerNextEventTimeLocked(mEventListeners[i], now); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 267 | |
| 268 | if (t < nextEventTime) { |
| 269 | nextEventTime = t; |
| 270 | } |
| 271 | } |
| 272 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 273 | ALOGV("[%s] nextEventTime = %" PRId64, mName, ns2us(nextEventTime)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 274 | return nextEventTime; |
| 275 | } |
| 276 | |
| 277 | Vector<CallbackInvocation> gatherCallbackInvocationsLocked(nsecs_t now) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 278 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 279 | ALOGV("[%s] gatherCallbackInvocationsLocked @ %" PRId64, mName, ns2us(now)); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 280 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 281 | Vector<CallbackInvocation> callbackInvocations; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 282 | nsecs_t onePeriodAgo = now - mPeriod; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 283 | |
| 284 | for (size_t i = 0; i < mEventListeners.size(); i++) { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 285 | nsecs_t t = computeListenerNextEventTimeLocked(mEventListeners[i], onePeriodAgo); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 286 | |
Jamie Gennis | 0d5c60e | 2013-10-09 17:49:37 -0700 | [diff] [blame] | 287 | if (t < now) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 288 | CallbackInvocation ci; |
| 289 | ci.mCallback = mEventListeners[i].mCallback; |
| 290 | ci.mEventTime = t; |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 291 | ALOGV("[%s] [%s] Preparing to fire", mName, mEventListeners[i].mName); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 292 | callbackInvocations.push(ci); |
| 293 | mEventListeners.editItemAt(i).mLastEventTime = t; |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return callbackInvocations; |
| 298 | } |
| 299 | |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 300 | nsecs_t computeListenerNextEventTimeLocked(const EventListener& listener, nsecs_t baseTime) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 301 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 302 | ALOGV("[%s] [%s] computeListenerNextEventTimeLocked(%" PRId64 ")", mName, listener.mName, |
| 303 | ns2us(baseTime)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 304 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 305 | nsecs_t lastEventTime = listener.mLastEventTime + mWakeupLatency; |
| 306 | ALOGV("[%s] lastEventTime: %" PRId64, mName, ns2us(lastEventTime)); |
| 307 | if (baseTime < lastEventTime) { |
| 308 | baseTime = lastEventTime; |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 309 | ALOGV("[%s] Clamping baseTime to lastEventTime -> %" PRId64, mName, ns2us(baseTime)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 312 | baseTime -= mReferenceTime; |
| 313 | ALOGV("[%s] Relative baseTime = %" PRId64, mName, ns2us(baseTime)); |
| 314 | nsecs_t phase = mPhase + listener.mPhase; |
| 315 | ALOGV("[%s] Phase = %" PRId64, mName, ns2us(phase)); |
| 316 | baseTime -= phase; |
| 317 | ALOGV("[%s] baseTime - phase = %" PRId64, mName, ns2us(baseTime)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 318 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 319 | // If our previous time is before the reference (because the reference |
| 320 | // has since been updated), the division by mPeriod will truncate |
| 321 | // towards zero instead of computing the floor. Since in all cases |
| 322 | // before the reference we want the next time to be effectively now, we |
| 323 | // set baseTime to -mPeriod so that numPeriods will be -1. |
| 324 | // When we add 1 and the phase, we will be at the correct event time for |
| 325 | // this period. |
| 326 | if (baseTime < 0) { |
| 327 | ALOGV("[%s] Correcting negative baseTime", mName); |
| 328 | baseTime = -mPeriod; |
| 329 | } |
| 330 | |
| 331 | nsecs_t numPeriods = baseTime / mPeriod; |
| 332 | ALOGV("[%s] numPeriods = %" PRId64, mName, numPeriods); |
| 333 | nsecs_t t = (numPeriods + 1) * mPeriod + phase; |
| 334 | ALOGV("[%s] t = %" PRId64, mName, ns2us(t)); |
| 335 | t += mReferenceTime; |
| 336 | ALOGV("[%s] Absolute t = %" PRId64, mName, ns2us(t)); |
| 337 | |
| 338 | // Check that it's been slightly more than half a period since the last |
| 339 | // event so that we don't accidentally fall into double-rate vsyncs |
| 340 | if (t - listener.mLastEventTime < (3 * mPeriod / 5)) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 341 | t += mPeriod; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 342 | ALOGV("[%s] Modifying t -> %" PRId64, mName, ns2us(t)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 345 | t -= mWakeupLatency; |
| 346 | ALOGV("[%s] Corrected for wakeup latency -> %" PRId64, mName, ns2us(t)); |
| 347 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 348 | return t; |
| 349 | } |
| 350 | |
| 351 | void fireCallbackInvocations(const Vector<CallbackInvocation>& callbacks) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 352 | if (kTraceDetailedInfo) ATRACE_CALL(); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 353 | for (size_t i = 0; i < callbacks.size(); i++) { |
| 354 | callbacks[i].mCallback->onDispSyncEvent(callbacks[i].mEventTime); |
| 355 | } |
| 356 | } |
| 357 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 358 | const char* const mName; |
| 359 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 360 | bool mStop; |
| 361 | |
| 362 | nsecs_t mPeriod; |
| 363 | nsecs_t mPhase; |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 364 | nsecs_t mReferenceTime; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 365 | nsecs_t mWakeupLatency; |
| 366 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 367 | int64_t mFrameNumber; |
| 368 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 369 | Vector<EventListener> mEventListeners; |
| 370 | |
| 371 | Mutex mMutex; |
| 372 | Condition mCond; |
| 373 | }; |
| 374 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 375 | #undef LOG_TAG |
| 376 | #define LOG_TAG "DispSync" |
| 377 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 378 | class ZeroPhaseTracer : public DispSync::Callback { |
| 379 | public: |
| 380 | ZeroPhaseTracer() : mParity(false) {} |
| 381 | |
Mark Salyzyn | 92dc3fc | 2014-03-12 13:12:44 -0700 | [diff] [blame] | 382 | virtual void onDispSyncEvent(nsecs_t /*when*/) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 383 | mParity = !mParity; |
| 384 | ATRACE_INT("ZERO_PHASE_VSYNC", mParity ? 1 : 0); |
| 385 | } |
| 386 | |
| 387 | private: |
| 388 | bool mParity; |
| 389 | }; |
| 390 | |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 391 | DispSync::DispSync(const char* name) |
| 392 | : mName(name), mRefreshSkipCount(0), mThread(new DispSyncThread(name)) {} |
Andy McFadden | 645b1f7 | 2014-06-10 14:43:32 -0700 | [diff] [blame] | 393 | |
Saurabh Shah | f417453 | 2017-07-13 10:45:07 -0700 | [diff] [blame] | 394 | DispSync::~DispSync() {} |
| 395 | |
| 396 | void DispSync::init(bool hasSyncFramework, int64_t dispSyncPresentTimeOffset) { |
| 397 | mIgnorePresentFences = !hasSyncFramework; |
| 398 | mPresentTimeOffset = dispSyncPresentTimeOffset; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 399 | mThread->run("DispSync", PRIORITY_URGENT_DISPLAY + PRIORITY_MORE_FAVORABLE); |
Saurabh Shah | f417453 | 2017-07-13 10:45:07 -0700 | [diff] [blame] | 400 | |
Tim Murray | acff43d | 2016-07-29 13:57:24 -0700 | [diff] [blame] | 401 | // set DispSync to SCHED_FIFO to minimize jitter |
| 402 | struct sched_param param = {0}; |
Tim Murray | 3552063 | 2016-09-07 12:18:17 -0700 | [diff] [blame] | 403 | param.sched_priority = 2; |
Tim Murray | acff43d | 2016-07-29 13:57:24 -0700 | [diff] [blame] | 404 | if (sched_setscheduler(mThread->getTid(), SCHED_FIFO, ¶m) != 0) { |
| 405 | ALOGE("Couldn't set SCHED_FIFO for DispSyncThread"); |
| 406 | } |
| 407 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 408 | reset(); |
| 409 | beginResync(); |
| 410 | |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 411 | if (kTraceDetailedInfo) { |
| 412 | // If we're not getting present fences then the ZeroPhaseTracer |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 413 | // would prevent HW vsync event from ever being turned off. |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 414 | // Even if we're just ignoring the fences, the zero-phase tracing is |
| 415 | // not needed because any time there is an event registered we will |
| 416 | // turn on the HW vsync events. |
Fabien Sanglard | cbf153b | 2017-03-10 17:57:12 -0800 | [diff] [blame] | 417 | if (!mIgnorePresentFences && kEnableZeroPhaseTracer) { |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 418 | mZeroPhaseTracer = std::make_unique<ZeroPhaseTracer>(); |
| 419 | addEventListener("ZeroPhaseTracer", 0, mZeroPhaseTracer.get()); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 420 | } |
| 421 | } |
| 422 | } |
| 423 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 424 | void DispSync::reset() { |
| 425 | Mutex::Autolock lock(mMutex); |
| 426 | |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 427 | mPhase = 0; |
| 428 | mReferenceTime = 0; |
| 429 | mModelUpdated = false; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 430 | mNumResyncSamples = 0; |
| 431 | mFirstResyncSample = 0; |
| 432 | mNumResyncSamplesSincePresent = 0; |
| 433 | resetErrorLocked(); |
| 434 | } |
| 435 | |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 436 | bool DispSync::addPresentFence(const std::shared_ptr<FenceTime>& fenceTime) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 437 | Mutex::Autolock lock(mMutex); |
| 438 | |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 439 | mPresentFences[mPresentSampleOffset] = fenceTime; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 440 | mPresentSampleOffset = (mPresentSampleOffset + 1) % NUM_PRESENT_SAMPLES; |
| 441 | mNumResyncSamplesSincePresent = 0; |
| 442 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 443 | updateErrorLocked(); |
| 444 | |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 445 | return !mModelUpdated || mError > kErrorThreshold; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | void DispSync::beginResync() { |
| 449 | Mutex::Autolock lock(mMutex); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 450 | ALOGV("[%s] beginResync", mName); |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 451 | mModelUpdated = false; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 452 | mNumResyncSamples = 0; |
| 453 | } |
| 454 | |
| 455 | bool DispSync::addResyncSample(nsecs_t timestamp) { |
| 456 | Mutex::Autolock lock(mMutex); |
| 457 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 458 | ALOGV("[%s] addResyncSample(%" PRId64 ")", mName, ns2us(timestamp)); |
| 459 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 460 | size_t idx = (mFirstResyncSample + mNumResyncSamples) % MAX_RESYNC_SAMPLES; |
| 461 | mResyncSamples[idx] = timestamp; |
Haixia Shi | 664339a | 2015-10-28 13:22:22 -0700 | [diff] [blame] | 462 | if (mNumResyncSamples == 0) { |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 463 | mPhase = 0; |
| 464 | mReferenceTime = timestamp; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 465 | ALOGV("[%s] First resync sample: mPeriod = %" PRId64 ", mPhase = 0, " |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 466 | "mReferenceTime = %" PRId64, |
| 467 | mName, ns2us(mPeriod), ns2us(mReferenceTime)); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 468 | mThread->updateModel(mPeriod, mPhase, mReferenceTime); |
Haixia Shi | 664339a | 2015-10-28 13:22:22 -0700 | [diff] [blame] | 469 | } |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 470 | |
| 471 | if (mNumResyncSamples < MAX_RESYNC_SAMPLES) { |
| 472 | mNumResyncSamples++; |
| 473 | } else { |
| 474 | mFirstResyncSample = (mFirstResyncSample + 1) % MAX_RESYNC_SAMPLES; |
| 475 | } |
| 476 | |
| 477 | updateModelLocked(); |
| 478 | |
| 479 | if (mNumResyncSamplesSincePresent++ > MAX_RESYNC_SAMPLES_WITHOUT_PRESENT) { |
| 480 | resetErrorLocked(); |
| 481 | } |
| 482 | |
Fabien Sanglard | cbf153b | 2017-03-10 17:57:12 -0800 | [diff] [blame] | 483 | if (mIgnorePresentFences) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 484 | // If we don't have the sync framework we will never have |
| 485 | // addPresentFence called. This means we have no way to know whether |
| 486 | // or not we're synchronized with the HW vsyncs, so we just request |
| 487 | // that the HW vsync events be turned on whenever we need to generate |
| 488 | // SW vsync events. |
| 489 | return mThread->hasAnyEventListeners(); |
| 490 | } |
| 491 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 492 | // Check against kErrorThreshold / 2 to add some hysteresis before having to |
| 493 | // resync again |
| 494 | bool modelLocked = mModelUpdated && mError < (kErrorThreshold / 2); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 495 | ALOGV("[%s] addResyncSample returning %s", mName, modelLocked ? "locked" : "unlocked"); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 496 | return !modelLocked; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 497 | } |
| 498 | |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 499 | void DispSync::endResync() {} |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 500 | |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 501 | status_t DispSync::addEventListener(const char* name, nsecs_t phase, Callback* callback) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 502 | Mutex::Autolock lock(mMutex); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 503 | return mThread->addEventListener(name, phase, callback); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 504 | } |
| 505 | |
Andy McFadden | 645b1f7 | 2014-06-10 14:43:32 -0700 | [diff] [blame] | 506 | void DispSync::setRefreshSkipCount(int count) { |
| 507 | Mutex::Autolock lock(mMutex); |
| 508 | ALOGD("setRefreshSkipCount(%d)", count); |
| 509 | mRefreshSkipCount = count; |
| 510 | updateModelLocked(); |
Ruchi Kandoi | f52b3c8 | 2014-04-24 16:42:35 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Lloyd Pique | e83f931 | 2018-02-01 12:53:17 -0800 | [diff] [blame] | 513 | status_t DispSync::removeEventListener(Callback* callback) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 514 | Mutex::Autolock lock(mMutex); |
| 515 | return mThread->removeEventListener(callback); |
| 516 | } |
| 517 | |
Dan Stoza | 84d619e | 2018-03-28 17:07:36 -0700 | [diff] [blame] | 518 | status_t DispSync::changePhaseOffset(Callback* callback, nsecs_t phase) { |
| 519 | Mutex::Autolock lock(mMutex); |
| 520 | return mThread->changePhaseOffset(callback, phase); |
| 521 | } |
| 522 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 523 | void DispSync::setPeriod(nsecs_t period) { |
| 524 | Mutex::Autolock lock(mMutex); |
| 525 | mPeriod = period; |
| 526 | mPhase = 0; |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 527 | mReferenceTime = 0; |
| 528 | mThread->updateModel(mPeriod, mPhase, mReferenceTime); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Lajos Molnar | 67d8bd6 | 2014-09-11 14:58:45 -0700 | [diff] [blame] | 531 | nsecs_t DispSync::getPeriod() { |
| 532 | // lock mutex as mPeriod changes multiple times in updateModelLocked |
| 533 | Mutex::Autolock lock(mMutex); |
| 534 | return mPeriod; |
| 535 | } |
| 536 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 537 | void DispSync::updateModelLocked() { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 538 | ALOGV("[%s] updateModelLocked %zu", mName, mNumResyncSamples); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 539 | if (mNumResyncSamples >= MIN_RESYNC_SAMPLES_FOR_UPDATE) { |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 540 | ALOGV("[%s] Computing...", mName); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 541 | nsecs_t durationSum = 0; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 542 | nsecs_t minDuration = INT64_MAX; |
| 543 | nsecs_t maxDuration = 0; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 544 | for (size_t i = 1; i < mNumResyncSamples; i++) { |
| 545 | size_t idx = (mFirstResyncSample + i) % MAX_RESYNC_SAMPLES; |
| 546 | size_t prev = (idx + MAX_RESYNC_SAMPLES - 1) % MAX_RESYNC_SAMPLES; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 547 | nsecs_t duration = mResyncSamples[idx] - mResyncSamples[prev]; |
| 548 | durationSum += duration; |
| 549 | minDuration = min(minDuration, duration); |
| 550 | maxDuration = max(maxDuration, duration); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 551 | } |
| 552 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 553 | // Exclude the min and max from the average |
| 554 | durationSum -= minDuration + maxDuration; |
| 555 | mPeriod = durationSum / (mNumResyncSamples - 3); |
| 556 | |
| 557 | ALOGV("[%s] mPeriod = %" PRId64, mName, ns2us(mPeriod)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 558 | |
| 559 | double sampleAvgX = 0; |
| 560 | double sampleAvgY = 0; |
| 561 | double scale = 2.0 * M_PI / double(mPeriod); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 562 | // Intentionally skip the first sample |
| 563 | for (size_t i = 1; i < mNumResyncSamples; i++) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 564 | size_t idx = (mFirstResyncSample + i) % MAX_RESYNC_SAMPLES; |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 565 | nsecs_t sample = mResyncSamples[idx] - mReferenceTime; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 566 | double samplePhase = double(sample % mPeriod) * scale; |
| 567 | sampleAvgX += cos(samplePhase); |
| 568 | sampleAvgY += sin(samplePhase); |
| 569 | } |
| 570 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 571 | sampleAvgX /= double(mNumResyncSamples - 1); |
| 572 | sampleAvgY /= double(mNumResyncSamples - 1); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 573 | |
| 574 | mPhase = nsecs_t(atan2(sampleAvgY, sampleAvgX) / scale); |
| 575 | |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 576 | ALOGV("[%s] mPhase = %" PRId64, mName, ns2us(mPhase)); |
| 577 | |
| 578 | if (mPhase < -(mPeriod / 2)) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 579 | mPhase += mPeriod; |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 580 | ALOGV("[%s] Adjusting mPhase -> %" PRId64, mName, ns2us(mPhase)); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 581 | } |
| 582 | |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 583 | if (kTraceDetailedInfo) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 584 | ATRACE_INT64("DispSync:Period", mPeriod); |
Tim Murray | 4a4e4a2 | 2016-04-19 16:29:23 +0000 | [diff] [blame] | 585 | ATRACE_INT64("DispSync:Phase", mPhase + mPeriod / 2); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 586 | } |
| 587 | |
Andy McFadden | 645b1f7 | 2014-06-10 14:43:32 -0700 | [diff] [blame] | 588 | // Artificially inflate the period if requested. |
| 589 | mPeriod += mPeriod * mRefreshSkipCount; |
| 590 | |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 591 | mThread->updateModel(mPeriod, mPhase, mReferenceTime); |
| 592 | mModelUpdated = true; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 593 | } |
| 594 | } |
| 595 | |
| 596 | void DispSync::updateErrorLocked() { |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 597 | if (!mModelUpdated) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 598 | return; |
| 599 | } |
| 600 | |
Andy McFadden | 645b1f7 | 2014-06-10 14:43:32 -0700 | [diff] [blame] | 601 | // Need to compare present fences against the un-adjusted refresh period, |
| 602 | // since they might arrive between two events. |
| 603 | nsecs_t period = mPeriod / (1 + mRefreshSkipCount); |
| 604 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 605 | int numErrSamples = 0; |
| 606 | nsecs_t sqErrSum = 0; |
| 607 | |
| 608 | for (size_t i = 0; i < NUM_PRESENT_SAMPLES; i++) { |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 609 | // Only check for the cached value of signal time to avoid unecessary |
| 610 | // syscalls. It is the responsibility of the DispSync owner to |
| 611 | // call getSignalTime() periodically so the cache is updated when the |
| 612 | // fence signals. |
| 613 | nsecs_t time = mPresentFences[i]->getCachedSignalTime(); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 614 | if (time == Fence::SIGNAL_TIME_PENDING || time == Fence::SIGNAL_TIME_INVALID) { |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 615 | continue; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 616 | } |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 617 | |
| 618 | nsecs_t sample = time - mReferenceTime; |
| 619 | if (sample <= mPhase) { |
| 620 | continue; |
| 621 | } |
| 622 | |
| 623 | nsecs_t sampleErr = (sample - mPhase) % period; |
| 624 | if (sampleErr > period / 2) { |
| 625 | sampleErr -= period; |
| 626 | } |
| 627 | sqErrSum += sampleErr * sampleErr; |
| 628 | numErrSamples++; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | if (numErrSamples > 0) { |
| 632 | mError = sqErrSum / numErrSamples; |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 633 | mZeroErrSamplesCount = 0; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 634 | } else { |
| 635 | mError = 0; |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 636 | // Use mod ACCEPTABLE_ZERO_ERR_SAMPLES_COUNT to avoid log spam. |
| 637 | mZeroErrSamplesCount++; |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 638 | ALOGE_IF((mZeroErrSamplesCount % ACCEPTABLE_ZERO_ERR_SAMPLES_COUNT) == 0, |
| 639 | "No present times for model error."); |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 640 | } |
| 641 | |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 642 | if (kTraceDetailedInfo) { |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 643 | ATRACE_INT64("DispSync:Error", mError); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | void DispSync::resetErrorLocked() { |
| 648 | mPresentSampleOffset = 0; |
| 649 | mError = 0; |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 650 | mZeroErrSamplesCount = 0; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 651 | for (size_t i = 0; i < NUM_PRESENT_SAMPLES; i++) { |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 652 | mPresentFences[i] = FenceTime::NO_FENCE; |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 653 | } |
| 654 | } |
| 655 | |
Andy McFadden | 41d67d7 | 2014-04-25 16:58:34 -0700 | [diff] [blame] | 656 | nsecs_t DispSync::computeNextRefresh(int periodOffset) const { |
Andy McFadden | 150ecd8 | 2014-05-08 14:56:50 -0700 | [diff] [blame] | 657 | Mutex::Autolock lock(mMutex); |
Andy McFadden | 41d67d7 | 2014-04-25 16:58:34 -0700 | [diff] [blame] | 658 | nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); |
Haixia Shi | 676b1f6 | 2015-10-28 16:19:01 -0700 | [diff] [blame] | 659 | nsecs_t phase = mReferenceTime + mPhase; |
| 660 | return (((now - phase) / mPeriod) + periodOffset + 1) * mPeriod + phase; |
Andy McFadden | 41d67d7 | 2014-04-25 16:58:34 -0700 | [diff] [blame] | 661 | } |
| 662 | |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 663 | void DispSync::dump(String8& result) const { |
| 664 | Mutex::Autolock lock(mMutex); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 665 | result.appendFormat("present fences are %s\n", mIgnorePresentFences ? "ignored" : "used"); |
| 666 | result.appendFormat("mPeriod: %" PRId64 " ns (%.3f fps; skipCount=%d)\n", mPeriod, |
| 667 | 1000000000.0 / mPeriod, mRefreshSkipCount); |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 668 | result.appendFormat("mPhase: %" PRId64 " ns\n", mPhase); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 669 | result.appendFormat("mError: %" PRId64 " ns (sqrt=%.1f)\n", mError, sqrt(mError)); |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 670 | result.appendFormat("mNumResyncSamplesSincePresent: %d (limit %d)\n", |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 671 | mNumResyncSamplesSincePresent, MAX_RESYNC_SAMPLES_WITHOUT_PRESENT); |
| 672 | result.appendFormat("mNumResyncSamples: %zd (max %d)\n", mNumResyncSamples, MAX_RESYNC_SAMPLES); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 673 | |
| 674 | result.appendFormat("mResyncSamples:\n"); |
| 675 | nsecs_t previous = -1; |
| 676 | for (size_t i = 0; i < mNumResyncSamples; i++) { |
| 677 | size_t idx = (mFirstResyncSample + i) % MAX_RESYNC_SAMPLES; |
| 678 | nsecs_t sampleTime = mResyncSamples[idx]; |
| 679 | if (i == 0) { |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 680 | result.appendFormat(" %" PRId64 "\n", sampleTime); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 681 | } else { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 682 | result.appendFormat(" %" PRId64 " (+%" PRId64 ")\n", sampleTime, |
| 683 | sampleTime - previous); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 684 | } |
| 685 | previous = sampleTime; |
| 686 | } |
| 687 | |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 688 | result.appendFormat("mPresentFences [%d]:\n", NUM_PRESENT_SAMPLES); |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 689 | nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 690 | previous = Fence::SIGNAL_TIME_INVALID; |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 691 | for (size_t i = 0; i < NUM_PRESENT_SAMPLES; i++) { |
| 692 | size_t idx = (i + mPresentSampleOffset) % NUM_PRESENT_SAMPLES; |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 693 | nsecs_t presentTime = mPresentFences[idx]->getSignalTime(); |
| 694 | if (presentTime == Fence::SIGNAL_TIME_PENDING) { |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 695 | result.appendFormat(" [unsignaled fence]\n"); |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 696 | } else if (presentTime == Fence::SIGNAL_TIME_INVALID) { |
Brian Anderson | fbc80ae | 2017-05-26 16:23:54 -0700 | [diff] [blame] | 697 | result.appendFormat(" [invalid fence]\n"); |
| 698 | } else if (previous == Fence::SIGNAL_TIME_PENDING || |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 699 | previous == Fence::SIGNAL_TIME_INVALID) { |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 700 | result.appendFormat(" %" PRId64 " (%.3f ms ago)\n", presentTime, |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 701 | (now - presentTime) / 1000000.0); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 702 | } else { |
Lloyd Pique | 78ce418 | 2018-01-31 16:39:51 -0800 | [diff] [blame] | 703 | result.appendFormat(" %" PRId64 " (+%" PRId64 " / %.3f) (%.3f ms ago)\n", presentTime, |
| 704 | presentTime - previous, (presentTime - previous) / (double)mPeriod, |
| 705 | (now - presentTime) / 1000000.0); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 706 | } |
| 707 | previous = presentTime; |
| 708 | } |
Andy McFadden | 5167ec6 | 2014-05-22 13:08:43 -0700 | [diff] [blame] | 709 | |
| 710 | result.appendFormat("current monotonic time: %" PRId64 "\n", now); |
Andy McFadden | c751e92 | 2014-05-08 14:53:26 -0700 | [diff] [blame] | 711 | } |
| 712 | |
Jamie Gennis | faf77cc | 2013-07-30 15:10:32 -0700 | [diff] [blame] | 713 | } // namespace android |