surfaceflinger: add frame duration logging

Change-Id: Ib414a45e7e191f23a2726cbbbeb606e9ce68a3b5
This commit is contained in:
Jamie Gennis 2013-07-16 20:12:42 -07:00
parent bdce817047
commit 6547ff4327
9 changed files with 176 additions and 12 deletions

View File

@ -31,17 +31,22 @@ ANDROID_SINGLETON_STATIC_INSTANCE(EventLog)
EventLog::EventLog() {
}
void EventLog::doLogJank(const String8& window, int32_t value) {
EventLog::TagBuffer buffer(LOGTAG_SF_JANK);
buffer.startList(2);
void EventLog::doLogFrameDurations(const String8& window,
const int32_t* durations, size_t numDurations) {
EventLog::TagBuffer buffer(LOGTAG_SF_FRAME_DUR);
buffer.startList(1 + numDurations);
buffer.writeString8(window);
buffer.writeInt32(value);
for (size_t i = 0; i < numDurations; i++) {
buffer.writeInt32(durations[i]);
}
buffer.endList();
buffer.log();
}
void EventLog::logJank(const String8& window, int32_t value) {
EventLog::getInstance().doLogJank(window, value);
void EventLog::logFrameDurations(const String8& window,
const int32_t* durations, size_t numDurations) {
EventLog::getInstance().doLogFrameDurations(window, durations,
numDurations);
}
// ---------------------------------------------------------------------------

View File

@ -30,7 +30,8 @@ class String8;
class EventLog : public Singleton<EventLog> {
public:
static void logJank(const String8& window, int32_t value);
static void logFrameDurations(const String8& window,
const int32_t* durations, size_t numDurations);
protected:
EventLog();
@ -72,8 +73,9 @@ private:
EventLog(const EventLog&);
EventLog& operator =(const EventLog&);
enum { LOGTAG_SF_JANK = 60100 };
void doLogJank(const String8& window, int32_t value);
enum { LOGTAG_SF_FRAME_DUR = 60100 };
void doLogFrameDurations(const String8& window, const int32_t* durations,
size_t numDurations);
};
// ---------------------------------------------------------------------------

View File

@ -30,9 +30,12 @@
# 5: Id
# 6: Percent
# Default value for data of type int/long is 2 (bytes).
#
# See system/core/logcat/event.logtags for the master copy of the tags.
# surfaceflinger
60100 sf_jank (window|3),(value|1)
# 60100 - 60199 reserved for surfaceflinger
60100 sf_frame_dur (window|3),(dur0|1),(dur1|1),(dur2|1),(dur3|1),(dur4|1),(dur5|1),(dur6|1)
# NOTE - the range 1000000-2000000 is reserved for partners and others who
# want to define their own log tags without conflicting with the core platform.

View File

@ -17,17 +17,22 @@
// This is needed for stdint.h to define INT64_MAX in C++
#define __STDC_LIMIT_MACROS
#include <cutils/log.h>
#include <ui/Fence.h>
#include <utils/String8.h>
#include "FrameTracker.h"
#include "EventLog/EventLog.h"
namespace android {
FrameTracker::FrameTracker() :
mOffset(0),
mNumFences(0) {
mNumFences(0),
mDisplayPeriod(0) {
resetFrameCountersLocked();
}
void FrameTracker::setDesiredPresentTime(nsecs_t presentTime) {
@ -57,8 +62,18 @@ void FrameTracker::setActualPresentFence(const sp<Fence>& readyFence) {
mNumFences++;
}
void FrameTracker::setDisplayRefreshPeriod(nsecs_t displayPeriod) {
Mutex::Autolock lock(mMutex);
mDisplayPeriod = displayPeriod;
}
void FrameTracker::advanceFrame() {
Mutex::Autolock lock(mMutex);
// Update the statistic to include the frame we just finished.
updateStatsLocked(mOffset);
// Advance to the next frame.
mOffset = (mOffset+1) % NUM_FRAME_RECORDS;
mFrameRecords[mOffset].desiredPresentTime = INT64_MAX;
mFrameRecords[mOffset].frameReadyTime = INT64_MAX;
@ -98,12 +113,19 @@ void FrameTracker::clear() {
mFrameRecords[mOffset].actualPresentTime = INT64_MAX;
}
void FrameTracker::logAndResetStats(const String8& name) {
Mutex::Autolock lock(mMutex);
logStatsLocked(name);
resetFrameCountersLocked();
}
void FrameTracker::processFencesLocked() const {
FrameRecord* records = const_cast<FrameRecord*>(mFrameRecords);
int& numFences = const_cast<int&>(mNumFences);
for (int i = 1; i < NUM_FRAME_RECORDS && numFences > 0; i++) {
size_t idx = (mOffset+NUM_FRAME_RECORDS-i) % NUM_FRAME_RECORDS;
bool updated = false;
const sp<Fence>& rfence = records[idx].frameReadyFence;
if (rfence != NULL) {
@ -111,6 +133,7 @@ void FrameTracker::processFencesLocked() const {
if (records[idx].frameReadyTime < INT64_MAX) {
records[idx].frameReadyFence = NULL;
numFences--;
updated = true;
}
}
@ -120,9 +143,65 @@ void FrameTracker::processFencesLocked() const {
if (records[idx].actualPresentTime < INT64_MAX) {
records[idx].actualPresentFence = NULL;
numFences--;
updated = true;
}
}
if (updated) {
updateStatsLocked(idx);
}
}
}
void FrameTracker::updateStatsLocked(size_t newFrameIdx) const {
int* numFrames = const_cast<int*>(mNumFrames);
if (mDisplayPeriod > 0 && isFrameValidLocked(newFrameIdx)) {
size_t prevFrameIdx = (newFrameIdx+NUM_FRAME_RECORDS-1) %
NUM_FRAME_RECORDS;
if (isFrameValidLocked(prevFrameIdx)) {
nsecs_t newPresentTime =
mFrameRecords[newFrameIdx].actualPresentTime;
nsecs_t prevPresentTime =
mFrameRecords[prevFrameIdx].actualPresentTime;
nsecs_t duration = newPresentTime - prevPresentTime;
int numPeriods = int((duration + mDisplayPeriod/2) /
mDisplayPeriod);
for (int i = 0; i < NUM_FRAME_BUCKETS-1; i++) {
int nextBucket = 1 << (i+1);
if (numPeriods < nextBucket) {
numFrames[i]++;
return;
}
}
// The last duration bucket is a catch-all.
numFrames[NUM_FRAME_BUCKETS-1]++;
}
}
}
void FrameTracker::resetFrameCountersLocked() {
for (int i = 0; i < NUM_FRAME_BUCKETS; i++) {
mNumFrames[i] = 0;
}
}
void FrameTracker::logStatsLocked(const String8& name) const {
for (int i = 0; i < NUM_FRAME_BUCKETS; i++) {
if (mNumFrames[i] > 0) {
EventLog::logFrameDurations(name, mNumFrames, NUM_FRAME_BUCKETS);
return;
}
}
}
bool FrameTracker::isFrameValidLocked(size_t idx) const {
return mFrameRecords[idx].actualPresentTime > 0 &&
mFrameRecords[idx].actualPresentTime < INT64_MAX;
}
void FrameTracker::dump(String8& result) const {

View File

@ -43,6 +43,8 @@ public:
// frame time history.
enum { NUM_FRAME_RECORDS = 128 };
enum { NUM_FRAME_BUCKETS = 7 };
FrameTracker();
// setDesiredPresentTime sets the time at which the current frame
@ -68,12 +70,21 @@ public:
// at which the current frame became visible to the user.
void setActualPresentFence(const sp<Fence>& fence);
// setDisplayRefreshPeriod sets the display refresh period in nanoseconds.
// This is used to compute frame presentation duration statistics relative
// to this period.
void setDisplayRefreshPeriod(nsecs_t displayPeriod);
// advanceFrame advances the frame tracker to the next frame.
void advanceFrame();
// clear resets all the tracked frame data to zero.
void clear();
// logAndResetStats dumps the current statistics to the binary event log
// and then resets the accumulated statistics to their initial values.
void logAndResetStats(const String8& name);
// dump appends the current frame display time history to the result string.
void dump(String8& result) const;
@ -99,6 +110,21 @@ private:
// change. This allows it to be called from the dump method.
void processFencesLocked() const;
// updateStatsLocked updates the running statistics that are gathered
// about the frame times.
void updateStatsLocked(size_t newFrameIdx) const;
// resetFrameCounteresLocked sets all elements of the mNumFrames array to
// 0.
void resetFrameCountersLocked();
// logStatsLocked dumps the current statistics to the binary event log.
void logStatsLocked(const String8& name) const;
// isFrameValidLocked returns true if the data for the given frame index is
// valid and has all arrived (i.e. there are no oustanding fences).
bool isFrameValidLocked(size_t idx) const;
// mFrameRecords is the circular buffer storing the tracked data for each
// frame.
FrameRecord mFrameRecords[NUM_FRAME_RECORDS];
@ -115,6 +141,17 @@ private:
// doesn't grow with NUM_FRAME_RECORDS.
int mNumFences;
// mNumFrames keeps a count of the number of frames with a duration in a
// particular range of vsync periods. Element n of the array stores the
// number of frames with duration in the half-inclusive range
// [2^n, 2^(n+1)). The last element of the array contains the count for
// all frames with duration greater than 2^(NUM_FRAME_BUCKETS-1).
int32_t mNumFrames[NUM_FRAME_BUCKETS];
// mDisplayPeriod is the display refresh period of the display for which
// this FrameTracker is gathering information.
nsecs_t mDisplayPeriod;
// mMutex is used to protect access to all member variables.
mutable Mutex mMutex;
};

View File

@ -104,6 +104,10 @@ Layer::Layer(SurfaceFlinger* flinger, const sp<Client>& client,
// drawing state & current state are identical
mDrawingState = mCurrentState;
nsecs_t displayPeriod =
flinger->getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY);
mFrameTracker.setDisplayRefreshPeriod(displayPeriod);
}
void Layer::onFirstRef()
@ -134,6 +138,7 @@ Layer::~Layer() {
c->detachLayer(this);
}
mFlinger->deleteTextureAsync(mTextureName);
mFrameTracker.logAndResetStats(mName);
}
// ---------------------------------------------------------------------------
@ -1179,6 +1184,10 @@ void Layer::clearStats() {
mFrameTracker.clear();
}
void Layer::logFrameStats() {
mFrameTracker.logAndResetStats(mName);
}
// ---------------------------------------------------------------------------
Layer::LayerCleaner::LayerCleaner(const sp<SurfaceFlinger>& flinger,

View File

@ -298,6 +298,7 @@ public:
void dump(String8& result, Colorizer& colorizer) const;
void dumpStats(String8& result) const;
void clearStats();
void logFrameStats();
protected:
// constant

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@ -964,6 +964,11 @@ void SurfaceFlinger::postFramebuffer()
mLastSwapBufferTime = systemTime() - now;
mDebugInSwapBuffers = 0;
uint32_t flipCount = getDefaultDisplayDevice()->getPageFlipCount();
if (flipCount % LOG_FRAME_STATS_PERIOD == 0) {
logFrameStats();
}
}
void SurfaceFlinger::handleTransaction(uint32_t transactionFlags)
@ -1972,6 +1977,10 @@ void SurfaceFlinger::onInitializeDisplays() {
displays.add(d);
setTransactionState(state, displays, 0);
onScreenAcquired(getDefaultDisplayDevice());
const nsecs_t period =
getHwComposer().getRefreshPeriod(HWC_DISPLAY_PRIMARY);
mAnimFrameTracker.setDisplayRefreshPeriod(period);
}
void SurfaceFlinger::initializeDisplays() {
@ -2205,6 +2214,19 @@ void SurfaceFlinger::clearStatsLocked(const Vector<String16>& args, size_t& inde
mAnimFrameTracker.clear();
}
// This should only be called from the main thread. Otherwise it would need
// the lock and should use mCurrentState rather than mDrawingState.
void SurfaceFlinger::logFrameStats() {
const LayerVector& drawingLayers = mDrawingState.layersSortedByZ;
const size_t count = drawingLayers.size();
for (size_t i=0 ; i<count ; i++) {
const sp<Layer>& layer(drawingLayers[i]);
layer->logFrameStats();
}
mAnimFrameTracker.logAndResetStats(String8("<win-anim>"));
}
/*static*/ void SurfaceFlinger::appendSfConfigString(String8& result)
{
static const char* config =

View File

@ -132,6 +132,10 @@ private:
friend class Layer;
friend class SurfaceTextureLayer;
// This value is specified in number of frames. Log frame stats at most
// every half hour.
enum { LOG_FRAME_STATS_PERIOD = 30*60*60 };
// We're reference counted, never destroy SurfaceFlinger directly
virtual ~SurfaceFlinger();
@ -392,6 +396,8 @@ private:
const sp<const DisplayDevice>& hw,
uint32_t minLayerZ, uint32_t maxLayerZ);
void logFrameStats();
/* ------------------------------------------------------------------------
* Attributes
*/