RedisConnection#Connect(): get rid of spin lock#10265
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julianbrost merged 3 commits intomasterfrom May 14, 2025
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| /** | ||
| * Condition variable which doesn't block I/O threads | ||
| * Awaitable flag which doesn't block I/O threads, inspired by threading.Event from Python |
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Please see the updated docs of the class in question.
The current implementation is rather similar to Python's threading.Event, than to a CV.
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Instead of IoEngine::YieldCurrentCoroutine(yc) until m_Queues.FutureResponseActions.empty(), async-wait a CV which is updated along with m_Queues.FutureResponseActions.
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Instead of IoEngine::YieldCurrentCoroutine(yc) until m_Queues.FutureResponseActions.empty(), async-wait a CV which is updated along with m_Queues.FutureResponseActions.
👍 Re-connect still works on Redis restart, even if latter interrupted an outgoing message!
ref/NC/820479
claimed they start Icinga 2 with Icinga DB enabled – and it OOMs. I hope this spin lock is not responsible, but better safe than sorry.
Also, I'm sure we all agree that spin locks should be avoided, at least where easily possible.