Thanks to the contributions of several people, a new version of polltc is available with bug fixes. It should work on a wider range of traffic control configurations now. From the README:
BACKGROUND
polltc_ is a small Perl script I wrote for gathering statistics on
the effectiveness of a given traffic control configuration under
Linux. The script executes the `tc` binary for qdisc and class information
to obtain the necessary information. Due to `tc` limitations the maximum
resolution is 10 seconds.