zixuanweeei commented on issue #15741: MKL-DNN LBR-GRU Inference Integration (FP32 LBR-GRU) URL: https://github.com/apache/incubator-mxnet/pull/15741#issuecomment-520106238 From the CPU perspective, the `FusedRNNCell`s are constructed in three ways, + Fuse all the layers, when `input_size == state_size`, `direction == 1` + Fuse all the layers except for the first layer, when `input_size != state_size`, `direction == 1` + No fusion, layer by layer, when `direction == 2` Thus we intended to expand the tests to allow for the three cases above. It is possible that the expanded test causes the apparent flakiness of the tests. I'm not sure if there are some corner cases with the tests, which may be rarely used in real production.
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