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gh-135953: Add GIL contention markers to sampling profiler Gecko format (#139485)

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This commit enhances the Gecko format reporter in the sampling profiler
to include markers for GIL acquisition events.
This commit is contained in:
Pablo Galindo Salgado 2025-11-17 12:46:26 +00:00 • committed by GitHub
parent 994ab5c922
commit 89a914c58d
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GPG key ID: B5690EEEBB952194
9 changed files with 627 additions and 82 deletions
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4
Python/ceval_gil.c
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@ -207,6 +207,7 @@ drop_gil_impl(PyThreadState *tstate, struct _gil_runtime_state *gil)
_Py_atomic_store_int_relaxed(&gil->locked, 0);
if (tstate != NULL) {
tstate->holds_gil = 0;
tstate->gil_requested = 0;
}
COND_SIGNAL(gil->cond);
MUTEX_UNLOCK(gil->mutex);
@ -320,6 +321,8 @@ take_gil(PyThreadState *tstate)
MUTEX_LOCK(gil->mutex);
tstate->gil_requested = 1;
int drop_requested = 0;
while (_Py_atomic_load_int_relaxed(&gil->locked)) {
unsigned long saved_switchnum = gil->switch_number;
@ -407,6 +410,7 @@ take_gil(PyThreadState *tstate)
}
assert(_PyThreadState_CheckConsistency(tstate));
tstate->gil_requested = 0;
tstate->holds_gil = 1;
_Py_unset_eval_breaker_bit(tstate, _PY_GIL_DROP_REQUEST_BIT);
update_eval_breaker_for_thread(interp, tstate);