How can i track the GC when it's runing?

[Gary Willoughby via Digitalmars-d-learn]

On Monday, 25 January 2016 at 09:33:15 UTC, Dsby wrote:
> I want to know How can i track the GC when it's runing?
> And Which algorithm is  D's GC used,only Scan-Mark?

There is a good resource here:

https://dlang.org/spec/garbage.html

It details compiler flags to use to profile and log the GC usage.