It's not generational GC, it's generational ZGC. ZGC is a concurrent GC, both the marking phase and the evacuation phase are done concurrently with the program

It's not generational GC, it's generational ZGC. ZGC is a concurrent GC, both the marking phase and the evacuation phase are done concurrently with the program running. A generational ZGC is a generational concurrent GC. MS does not have such kind of tech.