When I wanted to know how long systemd actually needed to boot the default target, how would I do that ? An then, is it possible to create a graph to show which unit takes how much time to initialize and to what degree they are run in parallel ?
How can I count the time that needs systemd to boot a default target and then graph it?
boot;systemd;time;parallel
Use systemd-analyze built-in tool. You are especially interested in two options: blame and plotsystemd-analyze blamesystemd-analyze plot > graph.svgblame:    Print list of running units ordered by time to initplot:     Output SVG graphic showing service initialization