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/*
* Copyright (C) 2015 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 "JankTracker.h"
#include <errno.h>
#include <inttypes.h>
#include <sys/mman.h>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <limits>
#include <cutils/ashmem.h>
#include <log/log.h>
#include "Properties.h"
#include "utils/TimeUtils.h"
namespace android {
namespace uirenderer {
struct Comparison {
FrameInfoIndex start;
FrameInfoIndex end;
};
static const Comparison COMPARISONS[] = {
{FrameInfoIndex::IntendedVsync, FrameInfoIndex::Vsync},
{FrameInfoIndex::OldestInputEvent, FrameInfoIndex::Vsync},
{FrameInfoIndex::Vsync, FrameInfoIndex::SyncStart},
{FrameInfoIndex::SyncStart, FrameInfoIndex::IssueDrawCommandsStart},
{FrameInfoIndex::IssueDrawCommandsStart, FrameInfoIndex::FrameCompleted},
};
// If the event exceeds 10 seconds throw it away, this isn't a jank event
// it's an ANR and will be handled as such
static const int64_t IGNORE_EXCEEDING = seconds_to_nanoseconds(10);
/*
* We don't track direct-drawing via Surface:lockHardwareCanvas()
* for now
*
* TODO: kSurfaceCanvas can negatively impact other drawing by using up
* time on the RenderThread, figure out how to attribute that as a jank-causer
*/
static const int64_t EXEMPT_FRAMES_FLAGS = FrameInfoFlags::SurfaceCanvas;
// For testing purposes to try and eliminate test infra overhead we will
// consider any unknown delay of frame start as part of the test infrastructure
// and filter it out of the frame profile data
static FrameInfoIndex sFrameStart = FrameInfoIndex::IntendedVsync;
JankTracker::JankTracker(ProfileDataContainer* globalData, const DisplayInfo& displayInfo) {
mGlobalData = globalData;
nsecs_t frameIntervalNanos = static_cast<nsecs_t>(1_s / displayInfo.fps);
#if USE_HWC2
nsecs_t sfOffset = frameIntervalNanos - (displayInfo.presentationDeadline - 1_ms);
nsecs_t offsetDelta = sfOffset - displayInfo.appVsyncOffset;
// There are two different offset cases. If the offsetDelta is positive
// and small, then the intention is to give apps extra time by leveraging
// pipelining between the UI & RT threads. If the offsetDelta is large or
// negative, the intention is to subtract time from the total duration
// in which case we can't afford to wait for dequeueBuffer blockage.
if (offsetDelta <= 4_ms && offsetDelta >= 0) {
// SF will begin composition at VSYNC-app + offsetDelta. If we are triple
// buffered, this is the expected time at which dequeueBuffer will
// return due to the staggering of VSYNC-app & VSYNC-sf.
mDequeueTimeForgiveness = offsetDelta + 4_ms;
}
#endif
setFrameInterval(frameIntervalNanos);
}
void JankTracker::setFrameInterval(nsecs_t frameInterval) {
mFrameInterval = frameInterval;
mThresholds[kMissedVsync] = 1;
/*
* Due to interpolation and sample rate differences between the touch
* panel and the display (example, 85hz touch panel driving a 60hz display)
* we call high latency 1.5 * frameinterval
*
* NOTE: Be careful when tuning this! A theoretical 1,000hz touch panel
* on a 60hz display will show kOldestInputEvent - kIntendedVsync of being 15ms
* Thus this must always be larger than frameInterval, or it will fail
*/
mThresholds[kHighInputLatency] = static_cast<int64_t>(1.5 * frameInterval);
// Note that these do not add up to 1. This is intentional. It's to deal
// with variance in values, and should be sort of an upper-bound on what
// is reasonable to expect.
mThresholds[kSlowUI] = static_cast<int64_t>(.5 * frameInterval);
mThresholds[kSlowSync] = static_cast<int64_t>(.2 * frameInterval);
mThresholds[kSlowRT] = static_cast<int64_t>(.75 * frameInterval);
}
void JankTracker::finishFrame(const FrameInfo& frame) {
// Fast-path for jank-free frames
int64_t totalDuration = frame.duration(sFrameStart, FrameInfoIndex::FrameCompleted);
if (mDequeueTimeForgiveness
&& frame[FrameInfoIndex::DequeueBufferDuration] > 500_us) {
nsecs_t expectedDequeueDuration =
mDequeueTimeForgiveness + frame[FrameInfoIndex::Vsync]
- frame[FrameInfoIndex::IssueDrawCommandsStart];
if (expectedDequeueDuration > 0) {
// Forgive only up to the expected amount, but not more than
// the actual time spent blocked.
nsecs_t forgiveAmount = std::min(expectedDequeueDuration,
frame[FrameInfoIndex::DequeueBufferDuration]);
LOG_ALWAYS_FATAL_IF(forgiveAmount >= totalDuration,
"Impossible dequeue duration! dequeue duration reported %" PRId64
", total duration %" PRId64, forgiveAmount, totalDuration);
totalDuration -= forgiveAmount;
}
}
LOG_ALWAYS_FATAL_IF(totalDuration <= 0, "Impossible totalDuration %" PRId64, totalDuration);
mData->reportFrame(totalDuration);
(*mGlobalData)->reportFrame(totalDuration);
// Keep the fast path as fast as possible.
if (CC_LIKELY(totalDuration < mFrameInterval)) {
return;
}
// Only things like Surface.lockHardwareCanvas() are exempt from tracking
if (frame[FrameInfoIndex::Flags] & EXEMPT_FRAMES_FLAGS) {
return;
}
mData->reportJank();
(*mGlobalData)->reportJank();
for (int i = 0; i < NUM_BUCKETS; i++) {
int64_t delta = frame.duration(COMPARISONS[i].start, COMPARISONS[i].end);
if (delta >= mThresholds[i] && delta < IGNORE_EXCEEDING) {
mData->reportJankType((JankType) i);
(*mGlobalData)->reportJankType((JankType) i);
}
}
}
void JankTracker::dumpData(int fd, const ProfileDataDescription* description, const ProfileData* data) {
if (description) {
switch (description->type) {
case JankTrackerType::Generic:
break;
case JankTrackerType::Package:
dprintf(fd, "\nPackage: %s", description->name.c_str());
break;
case JankTrackerType::Window:
dprintf(fd, "\nWindow: %s", description->name.c_str());
break;
}
}
if (sFrameStart != FrameInfoIndex::IntendedVsync) {
dprintf(fd, "\nNote: Data has been filtered!");
}
data->dump(fd);
dprintf(fd, "\n");
}
void JankTracker::dumpFrames(int fd) {
FILE* file = fdopen(fd, "a");
fprintf(file, "\n\n---PROFILEDATA---\n");
for (size_t i = 0; i < static_cast<size_t>(FrameInfoIndex::NumIndexes); i++) {
fprintf(file, "%s", FrameInfoNames[i].c_str());
fprintf(file, ",");
}
for (size_t i = 0; i < mFrames.size(); i++) {
FrameInfo& frame = mFrames[i];
if (frame[FrameInfoIndex::SyncStart] == 0) {
continue;
}
fprintf(file, "\n");
for (int i = 0; i < static_cast<int>(FrameInfoIndex::NumIndexes); i++) {
fprintf(file, "%" PRId64 ",", frame[i]);
}
}
fprintf(file, "\n---PROFILEDATA---\n\n");
fflush(file);
}
void JankTracker::reset() {
mFrames.clear();
mData->reset();
(*mGlobalData)->reset();
sFrameStart = Properties::filterOutTestOverhead
? FrameInfoIndex::HandleInputStart
: FrameInfoIndex::IntendedVsync;
}
} /* namespace uirenderer */
} /* namespace android */
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