commit a0690f079d29e13ee6ccaf94e2dca06953a05460 Author: Mike Perry mikeperry-git@torproject.org Date: Thu Dec 10 17:27:55 2020 -0600
Update documentation for the number of modes for Xm estimator. --- src/core/or/circuitstats.c | 8 ++++---- 1 file 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)