Patch: Integrate async-profiler

[Aleksey Shipilev]

On 8/4/20 12:13 PM, Jason Zaugg wrote:
> You are too fast! I found a third issue that prevents thread filtering
> in wall clock profiling.
> 
> We need to enable filtering with a dummy thread (filter=0) when the
> profiler starts so that
> the subsequent registration of active threads in by user code actually filters.
> 
> I also fixed an incorrect parameter description for optThreads.

Not a problem:
  http://hg.openjdk.java.net/code-tools/jmh/rev/e428423ab9cb

Are there more bugs in sight? Or should we go ahead and run it through the release pipeline?

-- 
Thanks,
-Aleksey