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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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30
Objects/floatobject.c
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@ -1609,17 +1609,15 @@ _PyFloat_Init(void)
}
void
PyFloat_Fini(void)
PyFloat_CompactFreeList(size_t *pbc, size_t *pbf, size_t *bsum)
{
PyFloatObject *p;
PyFloatBlock *list, *next;
unsigned i;
int bc, bf; /* block count, number of freed blocks */
int frem, fsum; /* remaining unfreed floats per block, total */
size_t bc = 0, bf = 0; /* block count, number of freed blocks */
size_t fsum = 0; /* total unfreed ints */
int frem; /* remaining unfreed ints per block */
bc = 0;
bf = 0;
fsum = 0;
list = block_list;
block_list = NULL;
free_list = NULL;
@ -1654,6 +1652,22 @@ PyFloat_Fini(void)
fsum += frem;
list = next;
}
*pbc = bc;
*pbf = bf;
*bsum = fsum;
}
void
PyFloat_Fini(void)
{
PyFloatObject *p;
PyFloatBlock *list;
unsigned i;
size_t bc, bf; /* block count, number of freed blocks */
size_t fsum; /* total unfreed floats per block */
PyFloat_CompactFreeList(&bc, &bf, &fsum);
if (!Py_VerboseFlag)
return;
fprintf(stderr, "# cleanup floats");
@ -1662,7 +1676,9 @@ PyFloat_Fini(void)
}
else {
fprintf(stderr,
": %d unfreed float%s in %d out of %d block%s\n",
": %" PY_FORMAT_SIZE_T "d unfreed floats%s in %"
PY_FORMAT_SIZE_T "d out of %"
PY_FORMAT_SIZE_T "d block%s\n",
fsum, fsum == 1 ? "" : "s",
bc - bf, bc, bc == 1 ? "" : "s");
}