参考流程：
https://www.jianshu.com/p/03c40afab7a5?utm_campaign

工具位置:
external/chromium-trace/systrace.py

保存下面的代码到settrace.sh, 在抓取之前先执行下面指令 source settrace.sh

adb remount
adb shell setenforce 0
adb shell "echo 0 > /sys/kernel/debug/tracing/tracing_on"
adb shell "echo > /sys/kernel/debug/tracing/trace"
adb shell "echo 51200 > /sys/kernel/debug/tracing/buffer_size_kb"
adb shell "echo thermal:* > /sys/kernel/debug/tracing/set_event"
adb shell "echo msm_low_power:* >> /sys/kernel/debug/tracing/set_event"
adb shell "echo sched:sched_migrate_task >> /sys/kernel/debug/tracing/set_event"
adb shell "echo sched:sched_switch >> /sys/kernel/debug/tracing/set_event"
adb shell "echo sched:sched_wakeup >> /sys/kernel/debug/tracing/set_event"
adb shell "echo sched:sched_cpu_load >> /sys/kernel/debug/tracing/set_event"
adb shell "echo core_ctl_eval_need >> /sys/kernel/debug/tracing/set_event"
adb shell "echo cpufreq_interactive:* >> /d/tracing/set_event"
adb shell "echo kgsl:* >> /d/tracing/set_event"
adb shell "echo mdss:* >> /d/tracing/set_event"
adb shell "echo irq:* >> /sys/kernel/debug/tracing/set_event"
adb shell "cat /sys/kernel/debug/tracing/set_event"

抓取方法:

1. Frame drop issue on browsing, gaming, and UX 丢帧问题，浏览，游戏，和UX

$ python systrace.py gfx input view sched am wm dalvik freq idle load sync workq power mmc disk -b 40000 -t 10 -o output.html

2. Application launch latency 应用程序启动延迟

$ python systrace.py gfx input sched am wm dalvik freq idle load sync workq power mmc disk -b 40000 -t 10 -o output.html

3. Audio quality issue 音频质量问题

$ python systrace.py sched dalvik freq idle load sync workq power mmc disk audio hal res -b 40000 -t 10 -o output.html

4. Camera frame drop issue 相机帧下降问题

$ python systrace.py gfx sched am wm dalvik freq idle load sync workq power mmc disk camera hal res membus -b 40000 -t 10 -o output.html

5. Video frame drop issue 视频帧下降问题

$ python systrace.py gfx sched am wm dalvik freq idle load sync workq power mmc disk video audio hal res membus –b 40000 –t 10 -o output.html