nothing displayed
This  uses xfce-taskmanager-linux.c  and /proc

This has no data displayed and has errors:

(lxtask:15213): Gtk-CRITICAL **: IA__gtk_progress_set_percentage: assertion `percentage >= 0 && percentage <= 1.0' failed

(lxtask:15213): Gtk-CRITICAL **: IA__gtk_progress_set_percentage: assertion `percentage >= 0 && percentage <= 1.0' failed

