Add "ray timeline" command to auto-dump Chrome trace for the current Ray instance

[ericl]

No description provided.

[robertnishihara]

I just ran this on my laptop (MacOS) and saw

$ ray timeline
Traceback (most recent call last):
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/_psosx.py", line 362, in catch_zombie
    yield
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/_psosx.py", line 426, in cmdline
    return cext.proc_cmdline(self.pid)
ProcessLookupError: [Errno 3] No such process

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/rnishihara/anaconda3/bin/ray", line 11, in <module>
    load_entry_point('ray', 'console_scripts', 'ray')()
  File "/Users/rnishihara/ray_scratch/ray/python/ray/scripts/scripts.py", line 761, in main
    return cli()
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/Users/rnishihara/ray_scratch/ray/python/ray/scripts/scripts.py", line 716, in timeline
    for arglist in proc.cmdline():
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/__init__.py", line 663, in cmdline
    return self._proc.cmdline()
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/_psosx.py", line 342, in wrapper
    return fun(self, *args, **kwargs)
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/_psosx.py", line 426, in cmdline
    return cext.proc_cmdline(self.pid)
  File "/Users/rnishihara/anaconda3/lib/python3.6/contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "/Users/rnishihara/anaconda3/lib/python3.6/site-packages/psutil/_psosx.py", line 375, in catch_zombie
    raise AccessDenied(proc.pid, proc._name)
psutil._exceptions.AccessDenied: psutil.AccessDenied (pid=35463)

[ericl]

Ok, I think it's fixed now to ignore that as well.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/12516/
Test FAILed.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/12520/
Test FAILed.