Applications Graphics Acceleration Info:
Uptime: 102809662 Realtime: 196891968

** Graphics info for pid 31148 [com.android.settings] **

Stats since: 102794621664587ns
Total frames rendered: 105
Janky frames: 2 (1.90%)
50th percentile: 5ms
90th percentile: 7ms
95th percentile: 9ms
99th percentile: 19ms
Number Missed Vsync: 0
Number High input latency: 0
Number Slow UI thread: 2
Number Slow bitmap uploads: 0
Number Slow issue draw commands: 1
HISTOGRAM: 5ms=78 6ms=16 7ms=4 8ms=1 9ms=2 10ms=0 11ms=0 12ms=0 13ms=2 14ms=0 15ms=0 16ms=0 17ms=0 18ms=0 19ms=1 20ms=0 21ms=0 22ms=0 23ms=0 24ms=0 25ms=0 26ms=0 27ms=0 
...
...

这里将逐一解释以上重点信息：

• Graphics info for pid 31148 [com.android.settings]: 表明当前dump的为设置界面的帧信息，pid为31148
• Total frames rendered: 105 本次dump搜集了105帧的信息
• Janky frames: 2 (1.90%) 105帧中有2帧的耗时超过了16ms，卡顿概率为1.9%
• Number Missed Vsync: 0 垂直同步失败的帧
• Number High input latency: 0 处理input时间超时的帧数
• Number Slow UI thread: 2 因UI线程上的工作导致超时的帧数
• Number Slow bitmap uploads: 0 因bitmap的加载耗时的帧数
• Number Slow issue draw commands: 1 因绘制导致耗时的帧数
• HISTOGRAM: 5ms=78 6ms=16 7ms=4 ... 直方图数据，表面耗时为0-5ms的帧数为78，耗时为5-6ms的帧数为16，同理类推。