Cleanup file structure

bench/perf_monitoring/llt.cpp

@@ -0,0 +1,15 @@
+#include "gemm_common.h"
+#include <Eigen/Cholesky>
+
+EIGEN_DONT_INLINE
+void llt(const Mat &A, const Mat &B, Mat &C)
+{
+  C = A;
+  C.diagonal().array() += 1000;
+  Eigen::internal::llt_inplace<Mat::Scalar, Lower>::blocked(C);
+}
+
+int main(int argc, char **argv)
+{
+  return main_gemm(argc, argv, llt);
+}