See also :ref:`tracemalloc <tracemalloc>`.
- Compute fragmentation of pymalloc
- Compute fragmentation of the glibc heap
- Tool to visualize the fragmentation?
Issue #13483: http://bugs.python.org/file26069/tuples.py
- Improving Python's Memory Allocator, Evan Jones: http://www.evanjones.ca/memoryallocator/
- MemoryError when using highlight in hgweb: http://bz.selenic.com/show_bug.cgi?id=3005
- PyMem_RawMalloc(), PyMem_RawRealloc(), PyMem_RawFree(): new in Python 3.4
- PyMem_Malloc(), PyMem_Realloc(), PyMem_Free()
- PyObject_Malloc(), PyObject_Realloc(), PyObject_Free()
Current allocators:
- PyMem_RawMalloc(): system malloc()
- PyMem_Malloc(): system malloc()
- PyObject_Malloc(): pymalloc
http://www.python.org/dev/peps/pep-0445/
- VirtualAlloc
- Windows Low Fragementation Heap (LFH)
- Python: http://bugs.python.org/issue13483
Links:
- Used by PyObject_Malloc()
- Threshold of 512 bytes
- Arenas of 256 KB
Arena allocator:
- Windows: VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
- UNIX: mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
- Other: malloc(size);
/proc/self/statm:
size total program size
(same as VmSize in /proc/[pid]/status)
resident resident set size
(same as VmRSS in /proc/[pid]/status)
share shared pages (from shared mappings)
text text (code)
data data + stack
http://linux-mm.org/Low_On_Memory
/proc, https://www.kernel.org/doc/Documentation/filesystems/proc.txt:
/proc/buddyinfo /proc/pagetypeifo /proc/slabinfo => slabtop program /proc/meminfo /proc/vmallocinfo