使用openblas预测库提示Please compile with MKLDNN first to use MKLDNN

```shell
WARNING: Logging before InitGoogleLogging() is written to STDERR
E0909 15:25:51.994011 267520 analysis_config.cc:190] Please compile with MKLDNN first to use MKLDNN
```
这个E0909有什么影响？速度会比mkldnn版本慢？

Start at analysis_config.cc:190 and inspect how the OpenBLAS build handles the MKLDNN warning. Compare the documented or reproducible behavior with an MKLDNN build, including whether inference speed or functionality changes; done means the warning’s impact and expected configuration are clearly documented.

Written by the indexing model from the issue text.