Per maggiori informazioni:

bootchart -h
usage: bootchart [OPTION]... [FILE]...
-f,--format image format (png | eps | svg; default: svg)
-h,--help print this message
-n,--no-prune do not prune the process tree
-o,--output-dir output directory where images are stored (default: .)
-v,--version print version and exit