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@ -203,6 +203,16 @@ def install_stacksampler(interval=0.005):
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# so it just means it'll either get a copy with the new label set, or without it.
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# This presumes the implementation doesn't change to make that different, however.
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flamegraph._lock = gevent.lock.DummySemaphore()
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# There is also a lock we need to bypass on the actual counter values themselves.
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# Since they get created dynamically, this means we need to replace the lock function
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# that is used to create them.
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# This unfortunately means we go without locking for all metrics, not just this one,
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# however this is safe because we are using gevent, not threading. The lock is only
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# used to make incrementing/decrementing the counter thread-safe, which is not a concern
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# under gevent since there are no switch points under the lock.
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import prometheus_client.values
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prometheus_client.values.Lock = gevent.lock.DummySemaphore
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def sample(signum, frame):
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stack = []
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