To repro:
- visit http://bartzy.github.io/touch-latency-test/

I've attached a trace.


Title	GLES2DecoderImpl::HandlePostSubBufferCHROMIUM
Category	gpu
User Friendly Category	gpu
Start	        4,079.390 ms
Wall Duration	12.327 ms
CPU Duration	0.703 ms
Self Time	12.258 ms
CPU Self Time	0.641 ms

It isn't clear what's causing this to be descheduled, but it looks like something is descheduling it.
 

Deleted: trace_long-handle-post-sub-buffer.json.gz 4.4 MB

trace_long-handle-post-sub-buffer.json.gz 4.4 MB Download