piiswrong commented on a change in pull request #7654: Making mixed precision
work with all optimizers
URL: https://github.com/apache/incubator-mxnet/pull/7654#discussion_r140909368
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File path: python/mxnet/optimizer.py
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@@ -173,6 +182,36 @@ def create_state(self, index, weight):
The state associated with the weight.
"""
+ def create_mp_state(self, index, weight):
+ """Creates auxiliary state for a given weight, including FP32 master
+ copy if necessary.
+
+ This method is provided to perform automatic mixed precision training
+ for optimizers that do not support it themselves.
+
+ Parameters
+ ----------
+ index : int
+ An unique index to identify the weight.
+ weight : NDArray
+ The weight.
+
+ Returns
+ -------
+ state : any obj
+ The state associated with the weight.
+ """
+ weight_master_copy = None
+ if self.multi_precision and weight.dtype == numpy.float16:
+ weight_master_copy = array(weight, ctx=weight.context,
dtype=numpy.float32)
Review comment:
weight.astype(float32)
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