samskalicky commented on a change in pull request #18405:
URL: https://github.com/apache/incubator-mxnet/pull/18405#discussion_r448571094
##########
File path: python/mxnet/gluon/block.py
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@@ -1073,8 +1060,35 @@ def _build_cache(self, *args):
for name in out.list_auxiliary_states()}
# Partition the graph.
out = out.optimize_for(self._backend, arg_dict, aux_dict, ctx,
**self._backend_opts)
+ # BFS to delete the delete args/aux from the block Params and its
children's Params
+ input_names = out.list_inputs()
+ queue = [self]
+ while len(queue) > 0:
+ curr_block = queue.pop(0)
+ curr_params = curr_block.params if
isinstance(curr_block.params, dict) else curr_block.params._params
+ curr_params_names = list(curr_params.keys())
+ for k in curr_params_names:
+ if k not in input_names:
+ curr_params.pop(k)
Review comment:
removing params from a python-level block puts the model in bad state,
because now it doesnt work in Python. @leezu
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