suspect-devices/circuitpython/py/gc.c, branch v1.3.6CircuitPython - a Python implementation for teaching coding with microcontrollershttps://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=v1.3.62014-10-31T21:30:46+00:00py: Make gc.enable/disable just control auto-GC; alloc is still allowed.2014-10-31T21:30:46+00:00Damien Georgedamien.p.george@gmail.com2014-10-31T21:30:46+00:00urn:sha1:109c1de015eeee385020233e2f8cc6f921149103
gc.enable/disable are now the same as CPython: they just control whether
automatic garbage collection is enabled or not. If disabled, you can
still allocate heap memory, and initiate a manual collection.
py: Improve memory usage debugging; better GC AT dumping.2014-10-24T22:12:25+00:00Damien Georgedamien.p.george@gmail.com2014-10-24T22:12:25+00:00urn:sha1:0b13f3e026c842facf65743450246b15a8c2e064
In unix port, mem_info(1) now prints pretty GC alloc table.
py: Properly free string parse-node; add assertion to gc_free.2014-10-23T13:13:05+00:00Damien Georgedamien.p.george@gmail.com2014-10-23T13:13:05+00:00urn:sha1:e7bb0443cda9bfb88791c3a99bf0331217390eb4py: Clean up edge cases of malloc/realloc/free.2014-10-23T11:02:00+00:00Damien Georgedamien.p.george@gmail.com2014-10-23T11:02:00+00:00urn:sha1:37378f8a9d2b358fdde0f3451d816b7f506846ccpy: Add more debug printing code in gc_dump_alloc_table.2014-10-17T14:12:57+00:00Damien Georgedamien.p.george@gmail.com2014-10-17T14:12:57+00:00urn:sha1:c30595eb1b8245da4ce1b9e9c32cb238bcf899depy: Take gc_pool_start out of bss section, to reclaim 1st block of heap.2014-10-16T20:50:39+00:00Damien Georgedamien.p.george@gmail.com2014-10-16T20:50:39+00:00urn:sha1:37ada236b32e04338d24cb0e8a952af6b6bde55dpy: Fix GC realloc issue, where memory chunks were never shrunk.2014-10-15T18:24:47+00:00Damien Georgedamien.p.george@gmail.com2014-10-15T18:24:47+00:00urn:sha1:9b0b373e5e400b5ddb88928d169a64502c880888
Previously, a realloc to a smaller memory chunk size would not free the
unused blocks in the tail of the chunk.
py, gc: Further reduce heap fragmentation with new, faster gc alloc.2014-08-28T22:06:38+00:00Damien Georgedamien.p.george@gmail.com2014-08-28T22:06:38+00:00urn:sha1:516b09efc3e5d2d88457a0300b65497a9bc39624
The heap allocation is now exactly as it was before the "faster gc
alloc" patch, but it's still nearly as fast. It is fixed by being
careful to always update the "last free block" pointer whenever the heap
changes (eg free or realloc).
Tested on all tests by enabling EXTENSIVE_HEAP_PROFILING in py/gc.c:
old and new allocator have exactly the same behaviour, just the new one
is much faster.
py: Reduce fragmentation of GC heap.2014-08-28T09:18:40+00:00Damien Georgedamien.p.george@gmail.com2014-08-28T09:18:40+00:00urn:sha1:b796e3d848b30346c11d173f39c06df88c646e2f
Recent speed up of GC allocation made the GC have a fragmented heap.
This patch restores "original fragmentation behaviour" whilst still
retaining relatively fast allocation. This patch works because there is
always going to be a single block allocated now and then, which advances
the gc_last_free_atb_index pointer often enough so that the whole heap
doesn't need scanning.
Should address issue #836.
py: Speed up GC allocation.2014-08-22T17:17:02+00:00Damien Georgedamien.p.george@gmail.com2014-08-22T17:17:02+00:00urn:sha1:d5e7f6e37edc2fecbc0b3ceb19df425bafd45c90
This simple patch gives a very significant speed up for memory allocation
with the GC.
Eg, on PYBv1.0:
tests/basics/dict_del.py: 3.55 seconds -> 1.19 seconds
tests/misc/rge_sm.py: 15.3 seconds -> 2.48 seconds