mirror of
https://gitlab.torproject.org/tpo/core/tor.git
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Mike Perry
a9edb0b4f6
Save a backup if we get odd circuitbuildtimes and other state info. In the case of circuit build times, we no longer assert, and reset our state.
36 lines
1.9 KiB
Plaintext
36 lines
1.9 KiB
Plaintext
o Major bugfixes:
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- Ignore negative and large timeout values that can happen during a
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suspend or hibernate. These values caused various asserts to fire
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in the circuit build times code, crashing Tor. Bug 1245, bugfix on
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0.2.2.2-alpha.
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- Alter calculation of Pareto distribution parameter 'Xm' for Circuit Build
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Timeout learning to use the weighted average of the top N=3 modes. This
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should improve the timeout calculation in some cases, and prevent
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extremely high timeout values. Bug 1335, bugfix on 0.2.2.2-alpha.
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- Alter calculation of Pareto distribution parameter 'Alpha' to use a
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right censored distribution model. This allows us to remove the synthetic
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timeout generation and instead calculate build timeouts using truncated
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times. Bugs 1245+1335, bugfix on 0.2.2.2-alpha.
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- Keep circuits open (but do not use them) after the circuit timeout for
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up until the time corresponding to the 95th percentile on the Pareto CDF
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or 60 seconds, whichever is greater. This is done to provide better data
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for the new Pareto model. This percentile can be controlled by the
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consensus.
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o Minor bugfixes:
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- Eliminate a case where a circuit build time warning was displayed after
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network connectivity resumed. Bugfix on 0.2.2.2-alpha.
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o Minor features:
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- Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port event,
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to give information on the current rate of circuit timeouts over our
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stored history.
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- Add ability to disable circuit build time learning via consensus
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parameter and via a LearnCircuitBuildTimeout config option. Also
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automatically disable circuit build time calculation if we are either
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a AuthoritativeDirectory, or if we fail to write our state file. Bug 1296.
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- More gracefully handle corrupt state files, removing asserts in favor
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of saving a backup and resetting state.
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