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GH-126491: GC: Mark objects reachable from roots before doing cycle collection (GH-126502)

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* Mark almost all reachable objects before doing collection phase

* Add stats for objects marked

* Visit new frames before each increment

* Remove lazy dict tracking

* Update docs

* Clearer calculation of work to do.
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Mark Shannon 2024-11-18 14:31:26 +00:00 • committed by GitHub
parent a1d9c8aa80
commit b0fcc2c47a
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21 changed files with 332 additions and 330 deletions
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9
Python/gc_free_threading.c
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@ -3,7 +3,7 @@
#include "pycore_brc.h" // struct _brc_thread_state
#include "pycore_ceval.h" // _Py_set_eval_breaker_bit()
#include "pycore_context.h"
#include "pycore_dict.h" // _PyDict_MaybeUntrack()
#include "pycore_dict.h" // _PyInlineValuesSize()
#include "pycore_freelist.h" // _PyObject_ClearFreeLists()
#include "pycore_initconfig.h"
#include "pycore_interp.h" // PyInterpreterState.gc
@ -493,13 +493,6 @@ update_refs(const mi_heap_t *heap, const mi_heap_area_t *area,
return true;
}
}
else if (PyDict_CheckExact(op)) {
_PyDict_MaybeUntrack(op);
if (!_PyObject_GC_IS_TRACKED(op)) {
gc_restore_refs(op);
return true;
}
}
}
// We repurpose ob_tid to compute "gc_refs", the number of external