#26673: Record download times of smaller file sizes from partial completion
times
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Reporter: karsten | Owner: metrics-team
Type: enhancement | Status: reopened
Priority: Medium | Milestone:
Component: Metrics/Onionperf | Version:
Severity: Normal | Resolution:
Keywords: metrics-team-roadmap-2020 | Actual Points:
Parent ID: | Points: 3
Reviewer: | Sponsor: Sponsor59-must
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Comment (by karsten):
I started looking into this ticket. I need to take a break now, but before
I do, here are my thoughts:
- We're about to stop generating .tpf files in OnionPerf. However, we're
still using that format in metrics-lib. This means that we can very likely
ignore generating these new timestamps for .tpf files in OnionPerf, but we
should still think about doing it in metrics-lib.
- We should try to generalize from our historic choice of downloading 50
KiB, 1 MiB, and 5 MiB files by including some more timestamps in the
middle. There exists something called 1-2-5 series, which could guide us
here: 10 KiB, 20 KiB, 50 KiB, 100 KiB, 200 KiB, 1 MiB, 2 MiB, 5 MiB.
- Looking at the .json format, maybe we can have another dict like
`"payload_progress"` for progress by downloaded bytes: `"payload_bytes": {
"10240": 0.689492, "20480": 0.949185, ..., "5242880": 2.141004 }"`. Note
the 6 digits for microsecond precision, unlike the ~16 digits in
`"payload_progress"`.
- Maybe we can round `"payload_progress"` numbers to 6 digits for
microsecond precision as part of this ticket, in a separate commit? It's a
tiny change, but it makes .json files unnecessarily large.
- Once this dict is in .json files, I'll have to update metrics-lib to
parse it. That's going to be a tiny change, though.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26673#comment:14>
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