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I am able to run systrace but i am not able to see the traces for SurfaceFlinger. GPU, bufferQueues, etc.

I gave the following command: systrace.py --time=10 -o mynewtrace.html sched gfx view wm hal video workq

Its only giving output for CPU0, workqueues, irqs, kworker etc.

Any particular tracers we have to enable while compiling kernel? Am I missing anything else?

Thank You!

Vineet Bajaj
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  • I tried to see the atrace output. In Atrace output itself i am not able to see any surfaceflinger or userspace level events. Seems like i am missing on enabling something. Anu pointers? – Vineet Bajaj Sep 02 '15 at 13:36
  • SurfaceFlinger and buffer queues are logged from user space and don't require any unusual steps to enable. I assume you're running as root since you've got the kernel stuff showing up. What version of Android? Is the device actively updating the display while systrace is capturing data? – fadden Sep 02 '15 at 16:18
  • we are using kitkat 4.4 on arm processor. We are running a video while capturing the systrace output. – Vineet Bajaj Sep 03 '15 at 06:57

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Got the solution. The trace_marker file was not set to writeable for user space processes. After setting it using chmod 222 /sys/kernel/debug/tracing/trace_marker and doing adb shell stop adb shell start It started working.

Vineet Bajaj
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