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Patch #1953

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I implemented the function sys._compact_freelists() and C API functions PyInt_/PyFloat_CompactFreeList() to compact the pre-allocated blocks of ints and floats. They allow the user to reduce the memory usage of a Python process that deals with lots of numbers.
The patch also renames sys._cleartypecache to sys._clear_type_cache
This commit is contained in:
Christian Heimes 2008-02-04 18:00:12 +00:00
parent a26cf9b760
commit 422051a367
11 changed files with 160 additions and 42 deletions
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52
Objects/intobject.c
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@ -1202,28 +1202,15 @@ _PyInt_Init(void)
}
void
PyInt_Fini(void)
PyInt_CompactFreeList(size_t *pbc, size_t *pbf, size_t *bsum)
{
PyIntObject *p;
PyIntBlock *list, *next;
int i;
unsigned int ctr;
int bc, bf; /* block count, number of freed blocks */
int irem, isum; /* remaining unfreed ints per block, total */
size_t bc = 0, bf = 0; /* block count, number of freed blocks */
size_t isum = 0; /* total unfreed ints */
int irem; /* remaining unfreed ints per block */
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
PyIntObject **q;
i = NSMALLNEGINTS + NSMALLPOSINTS;
q = small_ints;
while (--i >= 0) {
Py_XDECREF(*q);
*q++ = NULL;
}
#endif
bc = 0;
bf = 0;
isum = 0;
list = block_list;
block_list = NULL;
free_list = NULL;
@ -1268,6 +1255,33 @@ PyInt_Fini(void)
isum += irem;
list = next;
}
*pbc = bc;
*pbf = bf;
*bsum = isum;
}
void
PyInt_Fini(void)
{
PyIntObject *p;
PyIntBlock *list;
unsigned int ctr;
size_t bc, bf; /* block count, number of freed blocks */
size_t isum; /* total unfreed ints per block */
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
int i;
PyIntObject **q;
i = NSMALLNEGINTS + NSMALLPOSINTS;
q = small_ints;
while (--i >= 0) {
Py_XDECREF(*q);
*q++ = NULL;
}
#endif
PyInt_CompactFreeList(&bc, &bf, &isum);
if (!Py_VerboseFlag)
return;
fprintf(stderr, "# cleanup ints");
@ -1276,7 +1290,9 @@ PyInt_Fini(void)
}
else {
fprintf(stderr,
": %d unfreed int%s in %d out of %d block%s\n",
": %" PY_FORMAT_SIZE_T "d unfreed ints%s in %"
PY_FORMAT_SIZE_T "d out of %"
PY_FORMAT_SIZE_T "d block%s\n",
isum, isum == 1 ? "" : "s",
bc - bf, bc, bc == 1 ? "" : "s");
}