Summary:
Fixes https://github.com/pytorch/pytorch/issues/23401
We cannot rely on `multiprocessing.util.register_after_fork` since it is only
called for processes created by the `multiprocessing` module and not `os.fork()`.
Moving to `pthread_atfork` does always get called. However, I don't think it's safe to call python functions inside of the `atfork` handler so the python code has to be a bit more careful when checking `_initialized`.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29101
Differential Revision: D18355451
Pulled By: ezyang
fbshipit-source-id: 4d4253a3669796212c099dad4e5bdfdb0df40469
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18598
ghimport-source-id: c74597e5e7437e94a43c163cee0639b20d0d0c6a
Stack from [ghstack](https://github.com/ezyang/ghstack):
* **#18598 Turn on F401: Unused import warning.**
This was requested by someone at Facebook; this lint is turned
on for Facebook by default. "Sure, why not."
I had to noqa a number of imports in __init__. Hypothetically
we're supposed to use __all__ in this case, but I was too lazy
to fix it. Left for future work.
Be careful! flake8-2 and flake8-3 behave differently with
respect to import resolution for # type: comments. flake8-3 will
report an import unused; flake8-2 will not. For now, I just
noqa'd all these sites.
All the changes were done by hand.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Differential Revision: D14687478
fbshipit-source-id: 30d532381e914091aadfa0d2a5a89404819663e3
* Improvize documentation
1. Add formula for erf, erfinv
2. Make exp, expm1 similar to log, log1p
3. Symbol change in ge, le, ne, isnan
* Fix minor nit in the docstring
* More doc improvements
1. Added some formulae
2. Complete scanning till "Other Operations" in Tensor docs
* Add more changes
1. Modify all torch.Tensor wherever required
* Fix Conv docs
1. Fix minor nits in the references for LAPACK routines
* Improve Pooling docs
1. Fix lint error
* Improve docs for RNN, Normalization and Padding
1. Fix flake8 error for pooling
* Final fixes for torch.nn.* docs.
1. Improve Loss Function documentation
2. Improve Vision Layers documentation
* Fix lint error
* Improve docstrings in torch.nn.init
* Fix lint error
* Fix minor error in torch.nn.init.sparse
* Fix Activation and Utils Docs
1. Fix Math Errors
2. Add explicit clean to Makefile in docs to prevent running graph generation script
while cleaning
3. Fix utils docs
* Make PYCMD a Makefile argument, clear up prints in the build_activation_images.py
* Fix batch norm doc error
This replaces the torch.Tensor constructors with factories that produce
Variables. Similarly, functions on the torch module (e.g. torch.randn)
now return Variables.
To keep the PR to a reasonable size, I've left most of the unused tensor
code. Subsequent PRs will remove the dead code, clean-up calls to
torch.autograd.Variable, and rename Variable to Tensor everywhere.
There are some breaking changes because Variable and Tensors had
slightly different semantics. There's a list of those changes here:
https://github.com/pytorch/pytorch/wiki/Breaking-Changes-from-Variable-and-Tensor-merge
There is a bit of nuance to this function. If one blindly charges in
and initializes all GPUs, it is going to take a long time. 20sec for
8 GPUs on my dev machine. But to a user, it is non-obvious that fork_rng
is going to hit all the GPUs by default (which it does by default for
safety reasons.) So there is a nice warning when we notice we're
hitting more than one GPU. There is a bit of extra generality
which is going to be used by torch.jit in a subsequent commit.
The motivation is that I wanted to add some more general purpose
utility random functions, but not gunk up torch/__init__.py.
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
