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Re: [tor-bugs] #21206 [Core Tor/Tor]: Measure client up/down bandwidth for directory requests, split by type
#21206: Measure client up/down bandwidth for directory requests, split by type
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Reporter: nickm | Owner: ahf
Type: defect | Status: needs_review
Priority: Medium | Milestone: Tor: 0.3.1.x-final
Component: Core Tor/Tor | Version:
Severity: Normal | Resolution:
Keywords: sponsor4 | Actual Points:
Parent ID: #21205 | Points: 3
Reviewer: | Sponsor:
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Changes (by ahf):
* status: needs_revision => needs_review
Comment:
I've updated my branch to support keeping information on the number of
sent and received `RELAY_DATA` cells. This should allow us to calculate
the following overheads as mentioned above:
- The number of bytes sent/received in the payloads.
- The number of cells containing data that have been passed over the
directory connection.
We should therefore be able to estimate:
- Relay cell headers.
- Padding bytes.
I'm unsure how we should measure/estimate the TLS record sizes and the
circuit headers/cells needed to setup the directory connection. I'll have
to dig into that to be sure.
I've left the two additional `unsigned data_cells_received` and `unsigned
data_cells_sent` members on `dir_connection_t` as unguarded, since their
lifetime is relatively short. If we do not want to have them around unless
for very specific builds I'll wrap them in a guard.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21206#comment:7>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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