Fix unsafe accesses of host objects from the manager #2248
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sporksmith
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Jul 1, 2022
This fixes a memory safety issue where `manager_getNodeBandwidth{Up,Down}()`
accesses a `Host` object without acquiring its lock. We cannot acquire the lock
here because a `GMutex` is not reentrant.
This fixes a memory safety issue where `manager_getLatency()` and `manager_getReliability()` access a `Host` object without acquiring its lock. We cannot acquire the lock here because a `GMutex` is not reentrant.
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This will noticably change the networking performance of larger simulations.
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Some examples of the expected network performance change (the difference between PR #2248 and nightly):
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The manager accesses
Hostobjects without acquiring the hosts' locks, which is not safe.Edit:
The simulation results have changed slightly in this PR, so I will try to investigate where this difference is from.
Edit 2:
With the workaround commit, the results are the same. We can revert that commit in a new PR.