Derek Murray

I don't think that code has been optimized for performance, so there are probably a few opportunities to improve it. The implementation seems to be O(N^3) for a graph with...

Usually this means the two workers have chosen different devices for their (shared) variables. One useful step is to log the `GraphDef` for each worker, then compare the chosen devices...

@reedwm You should be able to do this using `tf.contrib.summary.image()` (the equivalent "V2" summary op).

This sounds potentially useful for development, but it's unlikely anyone on the team will take this on soon, because we already have a supported configuration that works well enough. Marking...

As a team we don't use PyPy day-to-day, but we would welcome contributions if it's easy to do this without breaking CPython compatibility. My guess is that the two stumbling...

Can you provide more information about the `TypeError`? From looking at `session.py`, it seems the most likely candidate for raising this exception is [this line](https://github.com/tensorflow/tensorflow/blob/ac352bc807410c8a863d0b95202cceeb62ed0f10/tensorflow/python/client/session.py#L772). What type does `run_metadata_ptr` have...

@girving Unfortunately that error message is in generated code. Maybe take it up with the authors of https://github.com/swig/swig? :) Judging by that generated code, we seem to be in case...