Are the counters shown by, for example, tc -s qdisc accurate (w.r.t. time) and/or useful for measuring the effects of the QoS/TC options currently set? I'm setting up some RRDTool data collection routines in Perl to graph the effects of our QoS & TC decisions but I'm not sure if grabbing 'bytes' & 'borrowed' from the qdiscs (where applicable) is sufficient or will actually reflect what is happening on the wire. The other option I considered was to use fwmark filters only and have the same detection rules on both prerouting and outgoing tables to measure how many packets 'wanted' to go out and how many got out at any point in time. Thank you for your thoughts and time. PS, big thanks to Stef Coene for his website with all of its tools, including monitor.pl. Since someone will end up asking, its at http://users.belgacom.net/staf/ -- Michael T. Babcock http://www.fibrespeed.net/~mbabcock/
