access2rohit commented on a change in pull request #16104: Faster Transpose 2D
URL: https://github.com/apache/incubator-mxnet/pull/16104#discussion_r321500521
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File path: src/operator/tensor/matrix_op-inl.h
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@@ -257,6 +257,29 @@ struct TransposeParam : public
dmlc::Parameter<TransposeParam> {
}
};
+
+template<typename xpu, typename DType>
+MSHADOW_XINLINE void Transpose2D(DType *in, DType *out, index_t shape_0,
index_t shape_1) {
+// ensure cache line hits and prevent cache miss for any configuration
+index_t blocksize = 32;
+index_t n = shape_0;
+index_t p = shape_1;
+
+for (index_t i = 0; i < n; i += blocksize) {
+ #pragma omp parallel for
Review comment:
nit: align #pragma with underlying for loop
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