Currently we have 2 approaches to use libperfstat on AIX :
one is "normal" linkage at compile time; the other approach is dlopen/dladdr from src/hotspot/os/aix/libperfstat_aix.hpp (+cpp) .
The dlopen approach was beneficial for supporting advanced perfstat API versions on old build OS versions like AIX 5.3 . But now with minimum build OS AIX 7.X it might be possible to go for "normal" linkage at compile time.