/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:57: GtkWarning: could not open display warnings.warn(str(e), _gtk.Warning) bootchart v0.0.0

/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.py:57: GtkWarning: could not open display warnings.warn(str(e), _gtk.Warning) Usage: bootchart [options] PATH, ..., PATH Options: --version show program's version number and exit -h, --help show this help message and exit -i, --interactive start in active mode -f FORMAT, --format=FORMAT image format (...); default format ... -o PATH, --output=PATH output path (file or directory) where charts are stored -n, --no-prune do not prune the process tree -q, --quiet suppress informational messages --very-quiet suppress all messages except errors --verbose print all messages --profile profile rendering of chart (only useful when in batch mode indicated by -f) --show-pid show process ids in the bootchart as 'processname [pid]' --crop-after=PROCESS crop chart when idle after PROCESS is started --annotate=PROCESS annotate position where PROCESS is started --annotate-file=FILENAME filename to write annotation points to