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| author | Sam Gross <colesbury@gmail.com> | 2025-01-10 00:59:10 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-01-10 00:59:10 (GMT) |
| commit | c1417487e98e270d614965ed78ff9439044b65a6 (patch) | |
| tree | 9c1956881d668247a9daee46e9abc6058e0ba36e | |
| parent | 087bb48acac997c06e69dae25bae2dd75194b980 (diff) | |
| download | cpython-c1417487e98e270d614965ed78ff9439044b65a6.zip cpython-c1417487e98e270d614965ed78ff9439044b65a6.tar.gz cpython-c1417487e98e270d614965ed78ff9439044b65a6.tar.bz2 | |
gh-128691: Use deferred reference counting on `_thread._local` (#128693)
This change, along with the LOAD_ATTR specializations, makes the
"thread_local_read" micro benchmark in Tools/ftscalingbench/ftscalingbench.py
scale well to multiple threads.
| -rw-r--r-- | Modules/_threadmodule.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c index 2cbdfeb..d19ae32 100644 --- a/Modules/_threadmodule.c +++ b/Modules/_threadmodule.c @@ -1414,6 +1414,10 @@ local_new(PyTypeObject *type, PyObject *args, PyObject *kw) return NULL; } + // gh-128691: Use deferred reference counting for thread-locals to avoid + // contention on the shared object. + _PyObject_SetDeferredRefcount((PyObject *)self); + self->args = Py_XNewRef(args); self->kw = Py_XNewRef(kw); |