Add autograd hook for python rpc call #28211
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1. currently if autograd context is valid, even tensors do not require grads and grads function are not attached. it still send rpc with autograd meta. This is not ideal. This diff makes some change to make sure rpc with autograd meta is sent only if autograd context is valid and tensors require grads 2. meanwhile create a utiliy to attach autograd info and functions as needed 3. add autograd send/recv functions for python rpc call 4. make changes to support nested python rpc calls 5. disallow nested dist autograd context (was landed in #27022) Differential Revision: [D17819153](https://our.internmc.facebook.com/intern/diff/D17819153/) [ghstack-poisoned]
zhaojuanmao
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Oct 17, 2019
1. currently if autograd context is valid, even tensors do not require grads and grads function are not attached. it still send rpc with autograd meta. This is not ideal. This diff makes some change to make sure rpc with autograd meta is sent only if autograd context is valid and tensors require grads 2. meanwhile create a utiliy to attach autograd info and functions as needed 3. add autograd send/recv functions for python rpc call 4. make changes to support nested python rpc calls 5. disallow nested dist autograd context (was landed in #27022) Differential Revision: [D17819153](https://our.internmc.facebook.com/intern/diff/D17819153/) ghstack-source-id: 92090804 Pull Request resolved: #28211
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abandon this, duplicate of #27576. it is incorrectly exported |
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Stack from ghstack:
currently if autograd context is valid, even tensors do not require grads and grads function are not attached.
it still send rpc with autograd meta. This is not ideal.
This diff makes some change to make sure rpc with autograd meta is sent only if autograd context is valid and tensors require grads
meanwhile create a utiliy to attach autograd info and functions as needed
add autograd send/recv functions for python rpc call
make changes to support nested python rpc calls
disallow nested dist autograd context (was landed in Distributed Autograd - FAST mode backward pass implementation. #27022)
Differential Revision: D17819153