Reduce timeout and stallout values
On legacy/trac#33974 (moved) we discussed a suggestion to reduce timeouts for our three downloads as follows:
- 50 KiB download with 15 seconds timeout rather than 295 seconds,
- 1 MiB download with 60 seconds timeout rather than 1795 seconds, and
- 5 MiB download with 120 seconds timeout rather than 3595 seconds.
Similarly, stallouts would be dropped entirely:
- 50 KiB download with 0 seconds stallout rather than 300 seconds,
- 1 MiB download with 0 seconds stallout rather than 1800 seconds, and
- 5 MiB download with 0 seconds stallout rather than 3600 seconds.
After discussing this with irl we concluded that we might want to pick values somewhere in the middle. The smaller values above are being used by TGen for generating load for Shadow simulations, in that case it makes sense to use timeouts similar to how users would behave. But in the measurements we're doing with OnionPerf we can easily record more data even after a human user would have given up and later filter out measurements taking longer than whatever timeouts we want to use.
In particular, it would be important for us to use timeouts that are higher than timeouts used internally by the Tor client, so that we can observe what happens in those cases. Even if a human user would long have given up.
How about we use timeouts and stallouts close to 5 minutes, so that we avoid overlapping measurements? Like 270 seconds for all three download sizes? What would we use as stallout value here? 0?