zhreshold commented on issue #8506: Monitor Weights in Float16 (mx.nd.norm not implemented for float16) URL: https://github.com/apache/incubator-mxnet/issues/8506#issuecomment-341792778 Currently dot doesn't support fp16, which will be fixed later. In the mean time, you hack is valid and won't cause to much trouble since it's just a monitor callback. You can use whatever metric you want. Not sure if `mx.nd.mean(d ** 2)` will be faster in fp16 compared to the cast in fp32
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