Zheng Kaiping created SINGA-142:
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             Summary: A bug in BPTTWorker::Backward() function with layers 
partially unrolled in neuralnet
                 Key: SINGA-142
                 URL: https://issues.apache.org/jira/browse/SINGA-142
             Project: Singa
          Issue Type: Bug
            Reporter: Zheng Kaiping


This is in SINGA_HOME/src/work.cc, in “void BPTTWorker::Backward (int step, 
NeuralNet* net) {}” function. It affects training in neuralnets with partially 
unrolled layers.

To be specific, there is no need to consider non-unrolled layers (i.e, without 
parameter sharing) when aggregating gradients for parameters.



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