Re: [tor-bugs] #34215 [Metrics/Onionperf]: Harmonize TTFB/TTLB definitions with Tor Metrics plots

[Tor Bug Tracker & Wiki]

#34215: Harmonize TTFB/TTLB definitions with Tor Metrics plots
---+---
 Reporter:  karsten|  Owner:  karsten
 Type:  defect | Status:  closed
 Priority:  Medium |  Milestone:
Component:  Metrics/Onionperf  |Version:
 Severity:  Normal | Resolution:  fixed
 Keywords: |  Actual Points:  0.1
Parent ID:  #33327 | Points:
 Reviewer: |Sponsor:  Sponsor59
---+---
Changes (by karsten):

 * status:  needs_review => closed
 * resolution:   => fixed
 * actualpoints:   => 0.1


Comment:

 We agreed at today's team meeting that this is a good change. Rebased and
 merged to master. Closing.

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Re: [tor-bugs] #34215 [Metrics/Onionperf]: Harmonize TTFB/TTLB definitions with Tor Metrics plots

[Tor Bug Tracker & Wiki]

#34215: Harmonize TTFB/TTLB definitions with Tor Metrics plots
---+--
 Reporter:  karsten|  Owner:  karsten
 Type:  defect | Status:  needs_review
 Priority:  Medium |  Milestone:
Component:  Metrics/Onionperf  |Version:
 Severity:  Normal | Resolution:
 Keywords: |  Actual Points:
Parent ID:  #33327 | Points:
 Reviewer: |Sponsor:  Sponsor59
---+--
Changes (by karsten):

 * status:  accepted => needs_review


Comment:

 The first question here is how we want to define TTFB/TTLB:
  - Right now, OnionPerf considers the time between the `tgen` client
 sending the HTTP request to the `tgen` server and receiving the first/last
 byte of the HTTP response back as TTFB/TTLB. This excludes all the magic
 happening inside the `tor` client to provide a circuit and attach a stream
 to it. In some cases this is pretty fast, for example, when it can reuse a
 pre-built circuit to connect via an exit to its own `tgen` server. In
 other cases this can take a while, for example, when it needs to do the
 entire ~~hidden~~onion service connection establishment dance.
  - The [https://metrics.torproject.org/torperf.html Time to download files
 over Tor graph] on the Tor Metrics website measures TTLB as the time
 between the `tgen` client starting a measurement and receiving the last
 byte of the HTTP response from the `tgen` server. This includes all the
 magic as written above.

 I'd argue that we do care about measuring what's going on in `tor`, so we
 should switch OnionPerf to the definitions used on the Tor Metrics website
 graph.
 
[https://gitweb.torproject.org/user/karsten/onionperf.git/commit/?h=task-34215=a836f8747398d010646858743d62867ac1a35504
 Commit a836f87 in my task-34215 branch] contains the trivial patch.
 Comments welcome! I'll also bring this up for discussion at our next
 weekly meeting.

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Re: [tor-bugs] #34215 [Metrics/Onionperf]: Harmonize TTFB/TTLB definitions with Tor Metrics plots

[Tor Bug Tracker & Wiki]

#34215: Harmonize TTFB/TTLB definitions with Tor Metrics plots
---+---
 Reporter:  karsten|  Owner:  karsten
 Type:  defect | Status:  accepted
 Priority:  Medium |  Milestone:
Component:  Metrics/Onionperf  |Version:
 Severity:  Normal | Resolution:
 Keywords: |  Actual Points:
Parent ID:  #33327 | Points:
 Reviewer: |Sponsor:  Sponsor59
---+---
Changes (by karsten):

 * status:  new => accepted
 * owner:  metrics-team => karsten


Comment:

 Picking this up now.

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