Android帧率测试
SurfaceFlinger
SurfaceFlinger是Android的一个服务，运行在Android的System进程中，负责管理系统的帧缓冲区，绘制应用程序的UI。Android应用程序会请求SurfaceFlinger服务创建Surface，在上面绘制自己的UI，然后将这个已经绘制好了UI的Surface渲染到设备显示屏上去
$adb shell dumpsys SurfaceFlinger --latency-clear[void android::SurfaceFlinger::setMTKProperties(android::String8&)]========================================================================[AOSP
part] debug.sf.showupdates (mDebugRegion): 0 debug.sf.ddms
(mDebugDDMS): 0[MTK SF part] debug.sf.busyswap (mBusySwap): 0
debug.sf.log_repaint (mLogRepaint): 0 debug.sf.log_buffer
(mLogBuffer): 0 debug.sf.line_g3d (mLineG3D): 0 debug.sf.line_ss
(mLineScreenShot): 0 debug.sf.dump_ss (mDumpScreenShot): 0
debug.sf.slowmotion (mDelayTime): 0 debug.sf.contbufsenable
(mContBufsDump): 0[MTK GUI part] debug.bq.line: 0 debug.st.line:
0[MTK HWC part] debug.sf.line_ovl: 0 debug.sf.debug_oex:
0==================================================================获取可视窗口列表
$
adb shell dumpsys SurfaceFlinger --list[void android::SurfaceFlinger::setMTKProperties(android::String8&)]========================================================================[AOSP
part] debug.sf.showupdates (mDebugRegion): 0 debug.sf.ddms
(mDebugDDMS): 0[MTK SF part] debug.sf.busyswap (mBusySwap): 0
debug.sf.log_repaint (mLogRepaint): 0 debug.sf.log_buffer
(mLogBuffer): 0 debug.sf.line_g3d (mLineG3D): 0 debug.sf.line_ss
(mLineScreenShot): 0 debug.sf.dump_ss (mDumpScreenShot): 0
debug.sf.slowmotion (mDelayTime): 0 debug.sf.contbufsenable
(mContBufsDump): 0[MTK GUI part] debug.bq.line: 0 debug.st.line:
0[MTK HWC part] debug.sf.line_ovl: 0 debug.sf.debug_oex:
0========================================================================DimSurfacecom.android.systemui.ImageWallpapercom.tmall.wireless/com.tmall.wireless.maintab.module.TMMainTabActivitycom.tmall.wireless/com.tmall.wireless.module.category.TMNewCategoryActivitycom.tmall.wireless/com.tmall.wireless.module.search.searchResult.TMSearchResultActivityDimAnimatorStatusBar越下面的窗口，越在上层。如我要找天猫打开的Activity,就取得包名为com.tmall.wireless的最后一条数据xxx.TMSearchResultActivity
获取窗口的帧延时数据
$adb shell dumpsys SurfaceFlinger --latency
com.tmall.wireless/com.tmall.wireless.module.search.searchResult.TMSearchResultActivity[void
android::SurfaceFlinger::setMTKProperties(android::String8&)]========================================================================[AOSP
part] debug.sf.showupdates (mDebugRegion): 0 debug.sf.ddms
(mDebugDDMS): 0[MTK SF part] debug.sf.busyswap (mBusySwap): 0
debug.sf.log_repaint (mLogRepaint): 0 debug.sf.log_buffer
(mLogBuffer): 0 debug.sf.line_g3d (mLineG3D): 0 debug.sf.line_ss
(mLineScreenShot): 0 debug.sf.dump_ss (mDumpScreenShot): 0
debug.sf.slowmotion (mDelayTime): 0 debug.sf.contbufsenable
(mContBufsDump): 0[MTK GUI part] debug.bq.line: 0 debug.st.line:
0[MTK HWC part] debug.sf.line_ovl: 0 debug.sf.debug_oex:
0========================================================================173400381812193316205
1812209665589 18122106141281812212222282 1812227121282
18122279181281812239753051 1812261917205 18122625216671812273201051
1812296490820 1812297217743......1815880321744 1815896512436
18158976691281815897796051 1815913973205 18159150282821815915093359
1815931327974 18159324689741815933351974 1815948728436 1815949869743latency帧率数据说明
说明：
刷新频率： 17340038118121933162051812209665589 1812210614128218122122222821812227121282 1812227918128318122397530511812261917205 1812262521667……12718159150933591815931327974 181593246897412818159333519741815948728436 1815949869743
Thefirst line currently contains the refresh period innanosecond.第一行是刷新频率，后面有128行，每行3个时间戳。
Each128 following line contains 3 timestamps, of respectively the appdraw time , the vsync timestamp just prior the call to set and thetimestamp of the call to set.在/Users/army/JavaDev/adt_20140702/sdk/sources/android-xx/com/android/uiautomator/platform/SurfaceFlingerHelper.java中包含framerate 的计算方法：
/** * Calculate frame rate * @return */ public static double getFrameRate() { if (mRefreshPeriod < 0) { log(Run command + FRAME_LATENCY_CMD + before calcuating average frame rate); return -1.0; } if (mFrameBufferData.get(0) == null) { log(Run command + FRAME_LATENCY_CMD + before retrieving frame buffer data); return -1.0; } long startTime = Long.parseLong(mFrameBufferData.get(0).get(1)); long endTime = Long.parseLong(mFrameBufferData.get(mFrameLatencySampleSize - 1).get(1)); long totalDuration = endTime - startTime; return (double)((mFrameLatencySampleSize - 1) * Math.pow(10, 9))/totalDuration; }
dumpsysgfxinfo
在开发者选项中有个“ GPU呈现模式分析(ProfileGPU rendering，计算adbshell dumpsysgfxinfo中的呈现时间)”功能，在开启这个功能后，系统就会记录保留每个界面最后128帧图像绘制的相关时间信息。在开启这个功能后，重新启动APP，滑动页面然后执行adb命令
$
adb shell dumpsys gfxinfo com.tmall.wirelessApplications Graphics
Acceleration Info:Uptime: 386315 Realtime: 386308** Graphics info for
pid 4887 [com.tmall.wireless] **Recent DisplayList operations
ClipRect DrawText RestoreToCount RestoreToCount
DrawPatch
RestoreToCountDrawRectDrawPathDrawBitmapDrawText...multiDraw
DrawTextDrawPatchDrawBitmapDrawBitmapRectDrawRectDrawOval...multiDraw
DrawTextDrawPatchCaches:Current memory usage / total memory usage
(bytes): TextureCache 15078192 / 25165824 LayerCache
311296 / 16777216 RenderBufferCache 0 / 2097152
GradientCache 4096 / 524288 PathCache 1781076 /
10485760 TextDropShadowCache 0 / 2097152 FontRenderer 0
524288 / 524288Other: FboCache 1 / 16 PatchCache
3 / 512Total memory usage: 17698948 bytes, 16.88 MBProfile
data in
ms:com.tmall.wireless/com.tmall.wireless.module.search.searchResult.TMSearchResultActivity/android.view.ViewRootImpl@42f81df0Draw
ProcessExecute1.11 2.490.431.26 2.890.631.85 4.620.651.72
4.163.561.88 3.150.462.67 2.680.451.22 2.670.581.22 2.810.421.74
2.250.38102.77 10.32 0.522.48 5.480.532.19 4.990.562.10 4.770.501.10
2.550.402.26 4.040.47...View hierarchy:
com.tmall.wireless/com.tmall.wireless.maintab.module.TMMainTabActivity/android.view.ViewRootImpl@42d08ee8
138 views, 62.20 kB of display lists, 1637 frames rendered
com.tmall.wireless/com.tmall.wireless.module.search.searchResult.TMSearchResultActivity/android.view.ViewRootImpl@42f81df0
420 views, 82.98 kB of display lists, 862 frames renderedTotal
ViewRootImpl: 2Total Views: 558Total DisplayList: 145.18 kBDraw:表示在Java中创建显示列表部分中，OnDraw()方法占用的时间。Process：表示渲染引擎执行显示列表所花的时间，view越多，时间就越长Execute：表示把一帧数据发送到屏幕上排版显示实际花费的时间。其实是实际显示帧数据的后台缓存区与前台缓冲区交换后并将前台缓冲区的内容显示到屏幕上的时间。Draw+ Process + Execute = 完整显示一帧，这个时间要小于16ms才能保存每秒60帧。
取得数据后，复制到excel中生成堆积柱状图.
图中可以清晰的看出在滑动时,耗时明显有很多帧超过16ms。这些都是需要结合操作进行优化的。