ykim362 commented on a change in pull request #7303: add 
backward(is_train=False) and always mode for dropout
URL: https://github.com/apache/incubator-mxnet/pull/7303#discussion_r131047511
 
 

 ##########
 File path: src/operator/dropout-inl.h
 ##########
 @@ -96,7 +104,7 @@ class DropoutOp : public Operator {
       bernoulli_generate(count, this->pkeep_, maskptr);
   #pragma omp parallel for
       for (int i = 0; i < count; ++i) {
-        outptr[i] = dataptr[i] * maskptr[i];
+        outptr[i] = dataptr[i] * maskptr[i] * (1.0f / pkeep_);
 
 Review comment:
   @piiswrong Got it, Thanks! I am looking into the code again to make sure 
other things are correct.
 
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