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| author | Mike Perry <mikeperry-git@torproject.org> | 2020-12-10 17:27:55 -0600 |
|---|---|---|
| committer | Mike Perry <mikeperry-git@torproject.org> | 2021-02-18 11:21:25 -0600 |
| commit | a0690f079d29e13ee6ccaf94e2dca06953a05460 (patch) | |
| tree | 2383ed3cd955ed614935c3aeb286ee102511e362 /src/core | |
| parent | 525195a7153d47295de430002f28b4c27192b5c1 (diff) | |
| download | tor-a0690f079d29e13ee6ccaf94e2dca06953a05460.tar.gz tor-a0690f079d29e13ee6ccaf94e2dca06953a05460.zip | |
Update documentation for the number of modes for Xm estimator.
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/or/circuitstats.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/core/or/circuitstats.c b/src/core/or/circuitstats.c index 449c055973..066c275b2b 100644 --- a/src/core/or/circuitstats.c +++ b/src/core/or/circuitstats.c @@ -205,10 +205,10 @@ circuit_build_times_max_timeouts(void) * Retrieve and bounds-check the cbtnummodes consensus parameter. * * Effect: This value governs how many modes to use in the weighted - * average calculation of Pareto parameter Xm. A value of 3 introduces - * some bias (2-5% of CDF) under ideal conditions, but allows for better - * performance in the event that a client chooses guard nodes of radically - * different performance characteristics. + * average calculation of Pareto parameter Xm. Analysis of pairs of + * geographically near, far, and mixed guaeds has shown that a value of + * 10 introduces some allows for the actual timeout rate to be within + * 2-7% of the cutoff quantile, for quantiles between 60-80%. */ static int32_t circuit_build_times_default_num_xm_modes(void) |