Removing updates of Beta1 and Beta2 power accumulators outside the op #4925
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| learning_rate_t = learning_rate_t * | ||
| sqrt(1 - beta2_pow_out) / (1 - beta1_pow_out) | ||
| sqrt(1 - beta2_pow) / (1 - beta1_pow) |
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Looks like we no longer need to update beta_pow to beta_pow * beta inside the operatorKernel. I am wondering when and where will beta_pow be updated?
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We do not need these because beta1 and beta2 power accumulators will be constant for all parameters. On the other hand, we will have one instance of the adam_op for every parameter. So these will be done in accumulators that the Python API will control.
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Fixes #4909