[tor-bugs] #17598 [Core Tor/Tor]: Trace cell queue times in Tor to measure Tor application "congestion"

[Tor Bug Tracker & Wiki]

#17598: Trace cell queue times in Tor to measure Tor application "congestion"
---------------------------------------------+-----------------------------
 Reporter:  robgjansen                       |          Owner:  pastly
     Type:  enhancement                      |         Status:
                                             |  needs_revision
 Priority:  Medium                           |      Milestone:  Tor:
                                             |  0.3.2.x-final
Component:  Core Tor/Tor                     |        Version:
 Severity:  Normal                           |     Resolution:
 Keywords:  kist, tor-03-unspecified-201612  |  Actual Points:
Parent ID:  #12541                           |         Points:  4
 Reviewer:                                   |        Sponsor:
---------------------------------------------+-----------------------------
Changes (by pastly):

 * milestone:  Tor: 0.3.1.x-final => Tor: 0.3.2.x-final


Comment:

 This will not make it into 031. In addition to the above bug, it does not
 trace cells that originate at an exit (and I suspect cells that originate
 at the OP).

 It only traces cells that come in from
 `connection_or_process_cells_from_inbuf`. It probably should trace cells
 that are created in `relay_send_command_from_edge_` too.

 This is a big deal for our needs.

 Maybe tracing cells that don't go through the inbuf and start already
 halfway through Tor is different enough that they should be logged
 differently. For us right now, I don't think the difference is important
 and we really want the data from the additional cells.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17598#comment:16>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online