| /* |
| * Copyright 2019 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. |
| */ |
| |
| #include "PhaseOffsets.h" |
| |
| #include <cutils/properties.h> |
| |
| #include <optional> |
| |
| #include "SurfaceFlingerProperties.h" |
| |
| namespace { |
| |
| std::optional<nsecs_t> getProperty(const char* name) { |
| char value[PROPERTY_VALUE_MAX]; |
| property_get(name, value, "-1"); |
| if (const int i = atoi(value); i != -1) return i; |
| return std::nullopt; |
| } |
| |
| bool fpsEqualsWithMargin(float fpsA, float fpsB) { |
| static constexpr float MARGIN = 0.01f; |
| return std::abs(fpsA - fpsB) <= MARGIN; |
| } |
| |
| } // namespace |
| |
| namespace android::scheduler { |
| |
| PhaseConfiguration::~PhaseConfiguration() = default; |
| |
| namespace impl { |
| |
| PhaseOffsets::PhaseOffsets(const scheduler::RefreshRateConfigs& refreshRateConfigs) |
| : // Below defines the threshold when an offset is considered to be negative, i.e. targeting |
| // for the N+2 vsync instead of N+1. This means that: |
| // For offset < threshold, SF wake up (vsync_duration - offset) before HW vsync. |
| // For offset >= threshold, SF wake up (2 * vsync_duration - offset) before HW vsync. |
| mThresholdForNextVsync(getProperty("debug.sf.phase_offset_threshold_for_next_vsync_ns") |
| .value_or(std::numeric_limits<nsecs_t>::max())), |
| mOffsets(initializeOffsets(refreshRateConfigs)), |
| mRefreshRateFps(refreshRateConfigs.getCurrentRefreshRate().fps) {} |
| |
| void PhaseOffsets::dump(std::string& result) const { |
| const auto [early, earlyGl, late] = getCurrentOffsets(); |
| using base::StringAppendF; |
| StringAppendF(&result, |
| " app phase: %9" PRId64 " ns\t SF phase: %9" PRId64 " ns\n" |
| " early app phase: %9" PRId64 " ns\t early SF phase: %9" PRId64 " ns\n" |
| " GL early app phase: %9" PRId64 " ns\tGL early SF phase: %9" PRId64 " ns\n" |
| "next VSYNC threshold: %9" PRId64 " ns\n", |
| late.app, late.sf, early.app, early.sf, earlyGl.app, earlyGl.sf, |
| mThresholdForNextVsync); |
| } |
| |
| std::unordered_map<float, PhaseOffsets::Offsets> PhaseOffsets::initializeOffsets( |
| const scheduler::RefreshRateConfigs& refreshRateConfigs) const { |
| std::unordered_map<float, Offsets> offsets; |
| |
| for (const auto& [ignored, refreshRate] : refreshRateConfigs.getAllRefreshRates()) { |
| if (refreshRate.fps > 65.0f) { |
| offsets.emplace(refreshRate.fps, getHighFpsOffsets(refreshRate.vsyncPeriod)); |
| } else { |
| offsets.emplace(refreshRate.fps, getDefaultOffsets(refreshRate.vsyncPeriod)); |
| } |
| } |
| return offsets; |
| } |
| |
| PhaseOffsets::Offsets PhaseOffsets::getDefaultOffsets(nsecs_t vsyncDuration) const { |
| const int64_t vsyncPhaseOffsetNs = sysprop::vsync_event_phase_offset_ns(1000000); |
| const int64_t sfVsyncPhaseOffsetNs = sysprop::vsync_sf_event_phase_offset_ns(1000000); |
| |
| const auto earlySfOffsetNs = getProperty("debug.sf.early_phase_offset_ns"); |
| const auto earlyGlSfOffsetNs = getProperty("debug.sf.early_gl_phase_offset_ns"); |
| const auto earlyAppOffsetNs = getProperty("debug.sf.early_app_phase_offset_ns"); |
| const auto earlyGlAppOffsetNs = getProperty("debug.sf.early_gl_app_phase_offset_ns"); |
| |
| return { |
| { |
| earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs) < mThresholdForNextVsync |
| ? earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs) |
| : earlySfOffsetNs.value_or(sfVsyncPhaseOffsetNs) - vsyncDuration, |
| |
| earlyAppOffsetNs.value_or(vsyncPhaseOffsetNs), |
| }, |
| { |
| earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs) < mThresholdForNextVsync |
| ? earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs) |
| : earlyGlSfOffsetNs.value_or(sfVsyncPhaseOffsetNs) - vsyncDuration, |
| |
| earlyGlAppOffsetNs.value_or(vsyncPhaseOffsetNs), |
| }, |
| { |
| sfVsyncPhaseOffsetNs < mThresholdForNextVsync |
| ? sfVsyncPhaseOffsetNs |
| : sfVsyncPhaseOffsetNs - vsyncDuration, |
| |
| vsyncPhaseOffsetNs, |
| }, |
| }; |
| } |
| |
| PhaseOffsets::Offsets PhaseOffsets::getHighFpsOffsets(nsecs_t vsyncDuration) const { |
| const auto highFpsLateAppOffsetNs = |
| getProperty("debug.sf.high_fps_late_app_phase_offset_ns").value_or(2000000); |
| const auto highFpsLateSfOffsetNs = |
| getProperty("debug.sf.high_fps_late_sf_phase_offset_ns").value_or(1000000); |
| |
| const auto highFpsEarlySfOffsetNs = getProperty("debug.sf.high_fps_early_phase_offset_ns"); |
| const auto highFpsEarlyGlSfOffsetNs = getProperty("debug.sf.high_fps_early_gl_phase_offset_ns"); |
| const auto highFpsEarlyAppOffsetNs = getProperty("debug.sf.high_fps_early_app_phase_offset_ns"); |
| const auto highFpsEarlyGlAppOffsetNs = |
| getProperty("debug.sf.high_fps_early_gl_app_phase_offset_ns"); |
| |
| return { |
| { |
| highFpsEarlySfOffsetNs.value_or(highFpsLateSfOffsetNs) < mThresholdForNextVsync |
| ? highFpsEarlySfOffsetNs.value_or(highFpsLateSfOffsetNs) |
| : highFpsEarlySfOffsetNs.value_or(highFpsLateSfOffsetNs) - |
| vsyncDuration, |
| |
| highFpsEarlyAppOffsetNs.value_or(highFpsLateAppOffsetNs), |
| }, |
| { |
| highFpsEarlyGlSfOffsetNs.value_or(highFpsLateSfOffsetNs) < |
| mThresholdForNextVsync |
| ? highFpsEarlyGlSfOffsetNs.value_or(highFpsLateSfOffsetNs) |
| : highFpsEarlyGlSfOffsetNs.value_or(highFpsLateSfOffsetNs) - |
| vsyncDuration, |
| |
| highFpsEarlyGlAppOffsetNs.value_or(highFpsLateAppOffsetNs), |
| }, |
| { |
| highFpsLateSfOffsetNs < mThresholdForNextVsync |
| ? highFpsLateSfOffsetNs |
| : highFpsLateSfOffsetNs - vsyncDuration, |
| |
| highFpsLateAppOffsetNs, |
| }, |
| }; |
| } |
| |
| PhaseOffsets::Offsets PhaseOffsets::getOffsetsForRefreshRate(float fps) const { |
| const auto iter = std::find_if(mOffsets.begin(), mOffsets.end(), |
| [&fps](const std::pair<float, Offsets>& candidateFps) { |
| return fpsEqualsWithMargin(fps, candidateFps.first); |
| }); |
| LOG_ALWAYS_FATAL_IF(iter == mOffsets.end()); |
| return iter->second; |
| } |
| |
| static void validateSysprops() { |
| const auto validatePropertyBool = [](const char* prop) { |
| LOG_ALWAYS_FATAL_IF(!property_get_bool(prop, false), "%s is false", prop); |
| }; |
| |
| validatePropertyBool("debug.sf.use_phase_offsets_as_durations"); |
| |
| LOG_ALWAYS_FATAL_IF(sysprop::vsync_event_phase_offset_ns(-1) != -1, |
| "ro.surface_flinger.vsync_event_phase_offset_ns is set but expecting " |
| "duration"); |
| |
| LOG_ALWAYS_FATAL_IF(sysprop::vsync_sf_event_phase_offset_ns(-1) != -1, |
| "ro.surface_flinger.vsync_sf_event_phase_offset_ns is set but expecting " |
| "duration"); |
| |
| const auto validateProperty = [](const char* prop) { |
| LOG_ALWAYS_FATAL_IF(getProperty(prop).has_value(), |
| "%s is set to %" PRId64 " but expecting duration", prop, |
| getProperty(prop).value_or(-1)); |
| }; |
| |
| validateProperty("debug.sf.early_phase_offset_ns"); |
| validateProperty("debug.sf.early_gl_phase_offset_ns"); |
| validateProperty("debug.sf.early_app_phase_offset_ns"); |
| validateProperty("debug.sf.early_gl_app_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_late_app_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_late_sf_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_early_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_early_gl_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_early_app_phase_offset_ns"); |
| validateProperty("debug.sf.high_fps_early_gl_app_phase_offset_ns"); |
| } |
| |
| static nsecs_t sfDurationToOffset(nsecs_t sfDuration, nsecs_t vsyncDuration) { |
| return sfDuration == -1 ? 1'000'000 : vsyncDuration - sfDuration % vsyncDuration; |
| } |
| |
| static nsecs_t appDurationToOffset(nsecs_t appDuration, nsecs_t sfDuration, nsecs_t vsyncDuration) { |
| return sfDuration == -1 ? 1'000'000 |
| : vsyncDuration - (appDuration + sfDuration) % vsyncDuration; |
| } |
| |
| PhaseDurations::Offsets PhaseDurations::constructOffsets(nsecs_t vsyncDuration) const { |
| return Offsets{ |
| { |
| mSfEarlyDuration < vsyncDuration |
| ? sfDurationToOffset(mSfEarlyDuration, vsyncDuration) |
| : sfDurationToOffset(mSfEarlyDuration, vsyncDuration) - vsyncDuration, |
| |
| appDurationToOffset(mAppEarlyDuration, mSfEarlyDuration, vsyncDuration), |
| }, |
| { |
| mSfEarlyGlDuration < vsyncDuration |
| ? sfDurationToOffset(mSfEarlyGlDuration, vsyncDuration) |
| : sfDurationToOffset(mSfEarlyGlDuration, vsyncDuration) - vsyncDuration, |
| |
| appDurationToOffset(mAppEarlyGlDuration, mSfEarlyGlDuration, vsyncDuration), |
| }, |
| { |
| mSfDuration < vsyncDuration |
| ? sfDurationToOffset(mSfDuration, vsyncDuration) |
| : sfDurationToOffset(mSfDuration, vsyncDuration) - vsyncDuration, |
| |
| appDurationToOffset(mAppDuration, mSfDuration, vsyncDuration), |
| }, |
| }; |
| } |
| |
| static std::vector<float> getRefreshRatesFromConfigs( |
| const android::scheduler::RefreshRateConfigs& refreshRateConfigs) { |
| const auto& allRefreshRates = refreshRateConfigs.getAllRefreshRates(); |
| std::vector<float> refreshRates; |
| refreshRates.reserve(allRefreshRates.size()); |
| |
| for (const auto& [ignored, refreshRate] : allRefreshRates) { |
| refreshRates.emplace_back(refreshRate.fps); |
| } |
| |
| return refreshRates; |
| } |
| |
| std::unordered_map<float, PhaseDurations::Offsets> PhaseDurations::initializeOffsets( |
| const std::vector<float>& refreshRates) const { |
| std::unordered_map<float, Offsets> offsets; |
| |
| for (const auto fps : refreshRates) { |
| offsets.emplace(fps, constructOffsets(static_cast<nsecs_t>(1e9f / fps))); |
| } |
| return offsets; |
| } |
| |
| PhaseDurations::PhaseDurations(const scheduler::RefreshRateConfigs& refreshRateConfigs) |
| : PhaseDurations(getRefreshRatesFromConfigs(refreshRateConfigs), |
| refreshRateConfigs.getCurrentRefreshRate().fps, |
| getProperty("debug.sf.late.sf.duration").value_or(-1), |
| getProperty("debug.sf.late.app.duration").value_or(-1), |
| getProperty("debug.sf.early.sf.duration").value_or(mSfDuration), |
| getProperty("debug.sf.early.app.duration").value_or(mAppDuration), |
| getProperty("debug.sf.earlyGl.sf.duration").value_or(mSfDuration), |
| getProperty("debug.sf.earlyGl.app.duration").value_or(mAppDuration)) { |
| validateSysprops(); |
| } |
| |
| PhaseDurations::PhaseDurations(const std::vector<float>& refreshRates, float currentFps, |
| nsecs_t sfDuration, nsecs_t appDuration, nsecs_t sfEarlyDuration, |
| nsecs_t appEarlyDuration, nsecs_t sfEarlyGlDuration, |
| nsecs_t appEarlyGlDuration) |
| : mSfDuration(sfDuration), |
| mAppDuration(appDuration), |
| mSfEarlyDuration(sfEarlyDuration), |
| mAppEarlyDuration(appEarlyDuration), |
| mSfEarlyGlDuration(sfEarlyGlDuration), |
| mAppEarlyGlDuration(appEarlyGlDuration), |
| mOffsets(initializeOffsets(refreshRates)), |
| mRefreshRateFps(currentFps) {} |
| |
| PhaseOffsets::Offsets PhaseDurations::getOffsetsForRefreshRate(float fps) const { |
| const auto iter = std::find_if(mOffsets.begin(), mOffsets.end(), [=](const auto& candidateFps) { |
| return fpsEqualsWithMargin(fps, candidateFps.first); |
| }); |
| |
| if (iter != mOffsets.end()) { |
| return iter->second; |
| } |
| |
| // Unknown refresh rate. This might happen if we get a hotplug event for the default display. |
| // This happens only during tests and not during regular device operation. |
| // In this case just construct the offset. |
| ALOGW("Can't find offset for %.2f fps", fps); |
| return constructOffsets(static_cast<nsecs_t>(1e9f / fps)); |
| } |
| |
| void PhaseDurations::dump(std::string& result) const { |
| const auto [early, earlyGl, late] = getCurrentOffsets(); |
| using base::StringAppendF; |
| StringAppendF(&result, |
| " app phase: %9" PRId64 " ns\t SF phase: %9" PRId64 |
| " ns\n" |
| " app duration: %9" PRId64 " ns\t SF duration: %9" PRId64 |
| " ns\n" |
| " early app phase: %9" PRId64 " ns\t early SF phase: %9" PRId64 |
| " ns\n" |
| " early app duration: %9" PRId64 " ns\t early SF duration: %9" PRId64 |
| " ns\n" |
| " GL early app phase: %9" PRId64 " ns\tGL early SF phase: %9" PRId64 |
| " ns\n" |
| " GL early app duration: %9" PRId64 " ns\tGL early SF duration: %9" PRId64 |
| " ns\n", |
| late.app, |
| |
| late.sf, |
| |
| mAppDuration, mSfDuration, |
| |
| early.app, early.sf, |
| |
| mAppEarlyDuration, mSfEarlyDuration, |
| |
| earlyGl.app, |
| |
| earlyGl.sf, |
| |
| mAppEarlyGlDuration, mSfEarlyGlDuration); |
| } |
| |
| } // namespace impl |
| } // namespace android::scheduler |