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Roger Dingledine
2010-07-09 14:07:54 -04:00
parent f72c6f91de
commit c3febf8660
3 changed files with 36 additions and 43 deletions
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changes/bug1564
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o Minor bugfixes
- Make directory mirrors report non-zero dirreq-v[23]-shares again.
Fixes bug 1564; bugfix on 0.2.2.9-alpha.
changes/cbt-bugfixes
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o Major bugfixes:
- Ignore negative and large timeout values that can happen during a
suspend or hibernate. These values caused various asserts to fire
in the circuit build times code, crashing Tor. Bug 1245, bugfix on
0.2.2.2-alpha.
- Alter calculation of Pareto distribution parameter 'Xm' for Circuit Build
Timeout learning to use the weighted average of the top N=3 modes. This
should improve the timeout calculation in some cases, and prevent
extremely high timeout values. Bug 1335, bugfix on 0.2.2.2-alpha.
- Alter calculation of Pareto distribution parameter 'Alpha' to use a
right censored distribution model. This allows us to remove the synthetic
timeout generation and instead calculate build timeouts using truncated
times. Bugs 1245+1335, bugfix on 0.2.2.2-alpha.
- Keep circuits open (but do not use them) after the circuit timeout for
up until the time corresponding to the 95th percentile on the Pareto CDF
or 60 seconds, whichever is greater. This is done to provide better data
for the new Pareto model. This percentile can be controlled by the
consensus.
o Minor bugfixes:
- Eliminate a case where a circuit build time warning was displayed after
network connectivity resumed. Bugfix on 0.2.2.2-alpha.
o Minor features:
- Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port event,
to give information on the current rate of circuit timeouts over our
stored history.
- Add ability to disable circuit build time learning via consensus
parameter and via a LearnCircuitBuildTimeout config option. Also
automatically disable circuit build time calculation if we are either
a AuthoritativeDirectory, or if we fail to write our state file. Bug 1296.
- More gracefully handle corrupt state files, removing asserts in favor
of saving a backup and resetting state.