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GH-100240: Generic freelist, applied to ints #101453

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iritkatriel wants to merge 19 commits into from
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GH-100240: Generic freelist, applied to ints #101453

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e953c57
freelist for ints
iritkatriel Jan 30, 2023
cf99ee4
moved things around a little
iritkatriel Jan 31, 2023
8a6e6a3
remove WITH_FREELISTS in longobject.c
iritkatriel Jan 31, 2023
fe65f49
FreeToFull leaves the list empty
iritkatriel Jan 31, 2023
a33061f
reuse _PyFreeList_Clear
iritkatriel Feb 3, 2023
6b312e0
fix free bug and remove ifdef in a few places
iritkatriel Feb 3, 2023
1d81198
use _PyLong_Free in specialized bytecodes
iritkatriel Feb 3, 2023
5609e30
use _PyLong_Free in _Py_DECREF_INT
iritkatriel Feb 3, 2023
b8b1879
stats for generic freelist
iritkatriel Feb 5, 2023
460d12c
print new stats
iritkatriel Feb 6, 2023
2e2a861
fix index mapping
iritkatriel Feb 6, 2023
42ee27f
tweak the stats
iritkatriel Feb 7, 2023
a9e76ad
shift instead of div
iritkatriel Feb 8, 2023
1134727
Merge remote-tracking branch 'upstream/main' into int-freelist
iritkatriel Feb 8, 2023
78592b9
int --> Py_ssize_t
iritkatriel Feb 8, 2023
044743e
disable the freelist after clearing it in interpreter_clear
iritkatriel Feb 8, 2023
827b81b
add _PyFreeList_Disable
iritkatriel Feb 9, 2023
51c6c3c
rename INDEX --> SIZE_CLASS
iritkatriel Feb 10, 2023
cfb886d
stats per size class
iritkatriel Feb 10, 2023
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add _PyFreeList_Disable
  • Loading branch information
@iritkatriel
iritkatriel committed Feb 9, 2023
commit 827b81b97427dbd7c1da8258e4c75c189bb59ba4
13 changes: 7 additions & 6 deletions Include/internal/pycore_pymem.h
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Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,6 @@ PyAPI_FUNC(int) _PyMem_GetAllocatorName(
PyAPI_FUNC(int) _PyMem_SetupAllocators(PyMemAllocatorName allocator);


#if WITH_FREELISTS
/* Free lists.
*
* Free lists have a pointer to their first entry and
Expand All @@ -111,7 +110,8 @@ typedef struct _freelist {

extern void *_PyFreeList_HalfFillAndAllocate(_PyFreeList *list);
extern void _PyFreeList_FreeToFull(_PyFreeList *list, void *ptr);

extern void _PyFreeList_Clear(_PyFreeList *list);
extern void _PyFreeList_Disable(_PyFreeList *list);

static inline void *
_PyFreeList_Alloc(_PyFreeList *list) {
Expand Down Expand Up @@ -151,13 +151,14 @@ static inline void
_PyFreeList_Init(_PyFreeList *list, int size, int capacity)
{
list->ptr = NULL;
list->space = list->capacity = capacity;
list->size = size;
#if WITH_FREELISTS
list->space = list->capacity = capacity;
#else
_PyFreeList_Disable(list);
#endif
}

extern void _PyFreeList_Clear(_PyFreeList *list);
#endif /* WITH_FREELISTS */

#ifdef __cplusplus
}
#endif
Expand Down
8 changes: 6 additions & 2 deletions Objects/obmalloc.c
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Expand Up @@ -718,7 +718,6 @@ PyObject_Free(void *ptr)
#endif


#if WITH_FREELISTS
void *
_PyFreeList_HalfFillAndAllocate(_PyFreeList *list)
{
Expand Down Expand Up @@ -759,6 +758,12 @@ _PyFreeList_Clear(_PyFreeList *list)
list->space += space;
}

void
_PyFreeList_Disable(_PyFreeList *list)
{
list->space = list->capacity = 0;
}

void
_PyFreeList_FreeToFull(_PyFreeList *list, void *ptr)
{
Expand All @@ -769,7 +774,6 @@ _PyFreeList_FreeToFull(_PyFreeList *list, void *ptr)
}
_PyFreeList_Clear(list);
}
#endif /* WITH_FREELISTS */

#ifdef WITH_PYMALLOC

Expand Down
3 changes: 1 addition & 2 deletions Python/pystate.c
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Expand Up @@ -767,8 +767,7 @@ interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate)

for (int i=0; i < INTERP_NUM_FREELISTS; i++) {
_PyFreeList_Clear(&interp->freelists[i]);
interp->freelists[i].space = 0;
interp->freelists[i].capacity = 0;
_PyFreeList_Disable(&interp->freelists[i]);
}

/* It is possible that any of the objects below have a finalizer
Expand Down