TaoLv commented on a change in pull request #9958: Parallelization for 
ROIpooling OP
URL: https://github.com/apache/incubator-mxnet/pull/9958#discussion_r171862625
 
 

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 File path: src/operator/roi_pooling.cc
 ##########
 @@ -74,7 +79,13 @@ inline void ROIPoolForward(const Tensor<cpu, 4, Dtype> &out,
 
     const Dtype* batch_data = bottom_data + data_size * roi_batch_ind;
 
+    #pragma omp parallel for firstprivate(batch_data, top_data, argmax_data)
 
 Review comment:
   Do you mean why there is a `firstprivate` clause here?

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