CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=3.0.0 2018-05-14T21:41:17+00:00 2018-05-14T21:41:17+00:00 Roy Hooper rhooper@toybox.ca 2018-05-14T21:41:17+00:00 urn:sha1:92b1cb574320578abe022c021c4b1891cfafbae6 2018-01-24T18:33:46+00:00 Scott Shawcroft scott.shawcroft@gmail.com 2018-01-24T00:22:05+00:00 urn:sha1:416abe33ed44e44d8f75342731080217e123278b This adapts the allocation process to start from either end of the heap when searching for free space. The default behavior is identical to the existing behavior where it starts with the lowest block and looks higher. Now it can also look from the highest block and lower depending on the long_lived parameter to gc_alloc. As the heap fills, the two sections may overlap. When they overlap, a collect may be triggered in order to keep the long lived section compact. However, free space is always eligable for each type of allocation. By starting from either of the end of the heap we have ability to separate short lived objects from long lived ones. This separation reduces heap fragmentation because long lived objects are easy to densely pack. Most objects are short lived initially but may be made long lived when they are referenced by a type or module. This involves copying the memory and then letting the collect phase free the old portion. QSTR pools and chunks are always long lived because they are never freed. The reallocation, collection and free processes are largely unchanged. They simply also maintain an index to the highest free block as well as the lowest. These indices are used to speed up the allocation search until the next collect. In practice, this change may slightly slow down import statements with the benefit that memory is much less fragmented afterwards. For example, a test import into a 20k heap that leaves ~6k free previously had the largest continuous free space of ~400 bytes. After this change, the largest continuous free space is over 3400 bytes. 2017-10-25T05:31:16+00:00 Scott Shawcroft scott.shawcroft@gmail.com 2017-10-25T05:31:16+00:00 urn:sha1:73c15dcf8b1b927757a595a867334b38355ddb8f This is prep for merging in the NRF5 pull request. 2017-09-10T10:54:00+00:00 Paul Sokolovsky pfalcon@users.sourceforge.net 2017-09-10T10:54:00+00:00 urn:sha1:9355cca610e2e7f16a5847271fefe47db97b8cc4 Defaults of 4096 and 5 respectively are too high to esp8266, causing out of memory with a database beyond couple of pages. 2017-08-26T02:17:07+00:00 Dan Halbert halbert@halwitz.org 2017-08-26T02:17:07+00:00 urn:sha1:ef61b5ecb59e9b4e37e3e3c023c62d583c23eb16 cpx build compiles and loads and works in repl; test suite not run yet esp8266 not tested yet 2017-08-23T18:05:59+00:00 Dan Halbert halbert@halwitz.org 2017-08-23T18:05:59+00:00 urn:sha1:74cfdeb316420a3732370a5e19a6822c52395384 Reworked frozen module support: clean up makefiles and handle multiple directories. Modules to freeze are included as git submodules. Add neopixel to circuitplayground express build. Fixes #56 2017-08-11T02:22:19+00:00 Damien George damien.p.george@gmail.com 2017-08-11T02:22:19+00:00 urn:sha1:7d4a2f773cc6ce24a91e2d210378188f3371e8a6 $(TOP) is defined in py/mkenv.mk and should be used to refer to the top level of this repository. 2017-07-24T05:50:47+00:00 Damien George damien.p.george@gmail.com 2017-07-24T05:50:47+00:00 urn:sha1:1ed3356540f55c9ed4167c87166f6d18b2868f9c Otherwise they can interfere (eg redefinition of "abort") with other source files in a given uPy port. 2017-05-29T08:36:05+00:00 Ville Skyttä ville.skytta@iki.fi 2017-05-29T07:08:14+00:00 urn:sha1:ca16c3821053e5bf2b87aeb10007f73f31dc1eac 2017-03-31T11:29:39+00:00 Damien George damien.p.george@gmail.com 2017-03-31T11:29:39+00:00 urn:sha1:b6c7e4b143d96ff9f84ccb22d83b1e15ab084250 This follows the pattern of how all other headers are now included, and makes it explicit where the header file comes from. This patch also removes -I options from Makefile's that specify the mp-readline/timeutils/ netutils directories, which are no longer needed.