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Let me sleep on it improving concurrency in unexpected ways


Contrary to the common belief, Python has real threads and even with the famous GIL, they can be used in useful ways. Vdsm is a heavily multi-threaded Python program, constantly juggling tens of threads waiting for blocking system calls. In this talk we will explore a real world thread synchronization problem taken from Vdsm's LVM cache module. We will demonstrate the problem using simple tests and show the unexpected solution.


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