boot sequence visualisation
pybootchartgui is a tool for visualization and analysis of the GNU/Linux boot process. It renders the output of the boot-logger tool bootchart interactively or to files of various formats.
Bootchart collects information about the processes, their dependencies, and resource consumption during boot of a GNU/Linux system. The pybootchartgui tools visualizes the process tree and overall resource utilization.
pybootchartgui is a port of the original visualization part of bootchart from Java to Python and Cairo.
In Ubuntu, the tools to collect the information can be found in the bootchart package.