ashokei commented on a change in pull request #10317: [MXNET-264] Improve performance of MKLDNN in small batch sizes. URL: https://github.com/apache/incubator-mxnet/pull/10317#discussion_r179302307
########## File path: src/operator/nn/mkldnn/mkldnn_batch_norm-inl.h ########## @@ -234,20 +234,15 @@ void MKLDNNBatchNormForward(const OpContext &ctx, const BatchNormParam ¶m, DType* weight_ptr = gamma.data().dptr<DType>(); DType* bias_ptr = beta.data().dptr<DType>(); if (!param.fix_gamma) { -#pragma omp parallel for - for (int i = 0; i < channels_; i++) { - weight_buf[i] = weight_ptr[i]; - weight_buf[channels_ + i] = bias_ptr[i]; // bias - } + memcpy(weight_buf, weight_ptr, sizeof(weight_buf[0]) * channels_); + memcpy(&weight_buf[channels_], bias_ptr, sizeof(weight_buf[0]) * channels_); Review comment: nice optimization above; why is the below OMP calls causing overhead. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services