第30讲 添加Stream Buffer interval统计图

[Charles]

本讲是Android Camera性能分析专题的第30讲，我们介绍统计每路stream的buffer时间间隔耗时，包括如下内容：

1. 添加Stream Buffer Interval Histogram
2. 添加Stream Buffer Interval Trace

资源	描述
在线课程	极客笔记在线课程
知识星球	星球名称：深入浅出Android Camera 星球ID: 17296815
Wechat	极客笔记圈

添加Stream Buffer Interval Histogram

代码见视频讲解，运行效果如下：

添加Stream Buffer Interval Trace

代码见视频讲解，运行效果如下:

代码修改点

diff --git a/Android13/libcameraservice/device3/Camera3OutputStream.cpp b/Android13/libcameraservice/device3/Camera3OutputStream.cpp
index 9ce1a7e..204947c 100644
--- a/Android13/libcameraservice/device3/Camera3OutputStream.cpp
+++ b/Android13/libcameraservice/device3/Camera3OutputStream.cpp
@@ -71,6 +71,9 @@ Camera3OutputStream::Camera3OutputStream(int id,
         mDropBuffers(false),
         mMirrorMode(mirrorMode),
         mDequeueBufferLatency(kDequeueLatencyBinSize),
+#ifdef Deepinout
+        mQueueBufferIntervalHistogram(kQueueBufferIntervalBinSize),
+#endif
         mIPCTransport(transport) {
 if (mConsumer == NULL) {

@@ -104,6 +107,9 @@ Camera3OutputStream::Camera3OutputStream(int id,

mDropBuffers(false),

mMirrorMode(mirrorMode),

mDequeueBufferLatency(kDequeueLatencyBinSize),

+#ifdef Deepinout


   mQueueBufferIntervalHistogram(kQueueBufferIntervalBinSize),



+#endif

mIPCTransport(transport) {
 if (format != HAL_PIXEL_FORMAT_BLOB && format != HAL_PIXEL_FORMAT_RAW_OPAQUE) {

@@ -144,6 +150,9 @@ Camera3OutputStream::Camera3OutputStream(int id,

mDropBuffers(false),

mMirrorMode(mirrorMode),

mDequeueBufferLatency(kDequeueLatencyBinSize),

+#ifdef Deepinout


   mQueueBufferIntervalHistogram(kQueueBufferIntervalBinSize),



+#endif

mIPCTransport(transport) {

// Deferred consumer only support preview surface format now.

if (format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {

@@ -192,6 +201,9 @@ Camera3OutputStream::Camera3OutputStream(int id, camera_stream_type_t type,

mDropBuffers(false),

mMirrorMode(mirrorMode),

mDequeueBufferLatency(kDequeueLatencyBinSize),

+#ifdef Deepinout


   mQueueBufferIntervalHistogram(kQueueBufferIntervalBinSize),



+#endif

mIPCTransport(transport) {
 bool needsReleaseNotify = setId > CAMERA3_STREAM_SET_ID_INVALID;

@@ -312,6 +324,17 @@ status_t Camera3OutputStream::returnBufferLocked(
 mLastTimestamp = timestamp;
 mFrameCount++;

+#ifdef Deepinout


nsecs_t currentQueueBufferTime = systemTime(SYSTEM_TIME_MONOTONIC);


if (mLastQueueBufferTime > 0) {


   mQueueBufferIntervalHistogram.add(mLastQueueBufferTime, currentQueueBufferTime);



   char traceLog[48];



   snprintf(traceLog, sizeof(traceLog), "queueBufferInterval-%d", mId);



   ATRACE_ASYNC_BEGIN(traceLog, mId);



   ATRACE_ASYNC_END(traceLog, mId);



}


mLastQueueBufferTime = currentQueueBufferTime;

+#endif
return OK;

}

@@ -521,6 +544,10 @@ void Camera3OutputStream::dump(int fd, const Vector<String16> &args) const {
mDequeueBufferLatency.dump(fd,

"      DequeueBuffer latency histogram:");

+#ifdef Deepinout


mQueueBufferIntervalHistogram.dump(fd,


   &quot;      QueueBufferInterval histogram:&quot;);



+#endif

}
status_t Camera3OutputStream::setTransform(int transform, bool mayChangeMirror) {

@@ -1025,6 +1052,14 @@ status_t Camera3OutputStream::disconnectLocked() {

mConsumerName.string(),

camera_stream::width,

camera_stream::height);


mQueueBufferIntervalHistogram.log("CamId(L:P):(%s:%s) Stream %d-%s-%dx%d queueBuffer interval histogram",


mLogicalCameraId.string(),


getPhysicalCameraId().string(),


mId,


mConsumerName.string(),


camera_stream::width,


camera_stream::height);


mQueueBufferIntervalHistogram.reset();

#endif

mDequeueBufferLatency.reset();

return OK;

diff --git a/Android13/libcameraservice/device3/Camera3OutputStream.h b/Android13/libcameraservice/device3/Camera3OutputStream.h

index e8065ce…05831ec 100644

— a/Android13/libcameraservice/device3/Camera3OutputStream.h

+++ b/Android13/libcameraservice/device3/Camera3OutputStream.h

@@ -408,6 +408,11 @@ class Camera3OutputStream :
static const int32_t kDequeueLatencyBinSize = 5; // in ms

CameraLatencyHistogram mDequeueBufferLatency;

+#ifdef Deepinout


nsecs_t mLastQueueBufferTime = 0;


static const int32_t kQueueBufferIntervalBinSize = 35; // in ms


CameraLatencyHistogram mQueueBufferIntervalHistogram;

+#endif

IPCTransport mIPCTransport = IPCTransport::INVALID;
int mImageDumpMask = 0;