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| author | Mike Perry <mikeperry-git@torproject.org> | 2020-11-03 14:39:10 -0600 |
|---|---|---|
| committer | Mike Perry <mikeperry-git@torproject.org> | 2021-02-18 11:21:25 -0600 |
| commit | 1fadb1bdf12610970af0ae9c7affd300830c3509 (patch) | |
| tree | 74bd4d44042d33051a5b81b3d51948b4e7e088bc /changes | |
| parent | ed9d60cb92efbf5bc2a3c22ade6ffee4e1c8116a (diff) | |
| download | tor-1fadb1bdf12610970af0ae9c7affd300830c3509.tar.gz tor-1fadb1bdf12610970af0ae9c7affd300830c3509.zip | |
Bug 40168 changes file
Diffstat (limited to 'changes')
| -rw-r--r-- | changes/bug40168 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/changes/bug40168 b/changes/bug40168 new file mode 100644 index 0000000000..c52a0352c2 --- /dev/null +++ b/changes/bug40168 @@ -0,0 +1,16 @@ + o Minor bugfixes (circuit build timeout): + - Improve the accuracy of our circuit build timeout calculation for 60%, + 70%, and 80% build rates for various guard choices. We now use a maximum + likelihood estimator for Pareto parameters of the circuit build time + distribution, instead of a "right-censored estimator". This causes + clients to ignore circuits that never finish building in their timeout + calculations. Previously, clients were counting such unfinished circuits + as having the highest possible build time value, when in reality these + circuits most likely just contain relays that are offline. We also now + wait a bit longer to let circuits complete for measurement purposes, + lower the minimum possible effective timeout from 1.5 seconds to 10ms, + and increase the resolution of the circuit build time histogram from + 50ms bin widths to 10ms bin widths. Additionally, we alter our estimate + Xm by taking the maximum of the top 10 most common build time values + of the 10ms histogram, and compute Xm as the average of these. + Fixes bug 40168; bugfix on 0.2.2.14-alpha. |