make results hangs on "Hang on, we are calculating your cache line size."

lmbench 701c6c35b0270d4634fb1dc5272721340322b8ed Ubuntu 20.04 AMD64, Lenovo ThinkPad P51 I ran:

```
cd src
make results
```

then pick default options to initial configs, and then it reaches:

```
Hang on, we are calculating your cache line size.
```

I've left it for 4 hours, and still stuck.

I wonder why doesn't it just use getconf/sysconf https://stackoverflow.com/questions/30207256/how-to-get-the-size-of-cpu-cache-in-linux ?