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Update documentation for the number of modes for Xm estimator.

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Mike Perry 2020-12-10 17:27:55 -06:00
parent 525195a715
commit a0690f079d
1 changed files with 4 additions and 4 deletions
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8
src/core/or/circuitstats.c
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@ -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)