问题
I am trying to run a Subclassed Keras Model on multiple GPUs. The code is running as expected, however, the following "warning" crops up during the execution of the code:
"Efficient allreduce is not supported for 2 IndexedSlices"
What does this mean? I followed the Multi-GPU tutorial on Tensorflow 2.0 Beta guide. I am also using the Dataset API for my input pipeline.
来源：https://stackoverflow.com/questions/56843876/efficient-allreduce-is-not-supported-for-2-indexedslices