J. Nick Koston
03eea7bd3f
Avoid subprocess memory copy when c library supports posix_spawn ( #87958 )
...
* use posix spawn on alpine
* Avoid subprocess memory copy when c library supports posix_spawn
By default python 3.10 will use the fork() which has to
copy all the memory of the parent process (in our case
this can be huge since Home Assistant core can use
hundreds of megabytes of RAM). By using posix_spawn
this is avoided.
In python 3.11 vfork will also be available
https://github.com/python/cpython/issues/80004#issuecomment-1093810689
https://github.com/python/cpython/pull/11671 but we won't
always be able to use it and posix_spawn is considered safer
https://bugzilla.kernel.org/show_bug.cgi?id=215813#c14
The subprocess library doesn't know about musl though
even though it supports posix_spawn https://git.musl-libc.org/cgit/musl/log/src/process/posix_spawn.c
so we have to teach it since it only has checks for glibc
https://github.com/python/cpython/blob/1b736838e6ae1b4ef42cdd27c2708face908f92c/Lib/subprocess.py#L745
The constant is documented as being able to be flipped here:
https://docs.python.org/3/library/subprocess.html#disabling-use-of-vfork-or-posix-spawn
* Avoid subprocess memory copy when c library supports posix_spawn
By default python 3.10 will use the fork() which has to
copy memory of the parent process (in our case
this can be huge since Home Assistant core can use
hundreds of megabytes of RAM). By using posix_spawn
this is avoided and subprocess creation does not
get discernibly slow the larger the Home Assistant
python process grows.
In python 3.11 vfork will also be available
https://github.com/python/cpython/issues/80004#issuecomment-1093810689
https://github.com/python/cpython/pull/11671 but we won't
always be able to use it and posix_spawn is considered safer
https://bugzilla.kernel.org/show_bug.cgi?id=215813#c14
The subprocess library doesn't know about musl though
even though it supports posix_spawn https://git.musl-libc.org/cgit/musl/log/src/process/posix_spawn.c
so we have to teach it since it only has checks for glibc
https://github.com/python/cpython/blob/1b736838e6ae1b4ef42cdd27c2708face908f92c/Lib/subprocess.py#L745
The constant is documented as being able to be flipped here:
https://docs.python.org/3/library/subprocess.html#disabling-use-of-vfork-or-posix-spawn
* missed some
* adjust more tests
* coverage
2023-02-13 09:02:51 -05:00
Marc Mueller
50e732d00f
Add image_processing device_class StrEnum ( #79124 )
2022-09-26 20:37:04 -04:00
Marc Mueller
dfa94d6ce1
Import image_processing constants from const ( #63461 )
2022-01-05 14:58:00 +01:00
epenet and epenet
ca366e6f87
Add image_processing setup type hints ( #63290 )
...
Co-authored-by: epenet <epenet@users.noreply.github.com >
2022-01-03 15:14:57 +01:00
Marc Mueller
f1d48ddfe3
Update pylint to 2.8.0 ( #49637 )
2021-04-24 14:39:24 -10:00
Marc Mueller
8e2b5b36b5
Bump pyupgrade to 2.12.0 ( #48943 )
2021-04-09 09:58:27 -07:00
Franck Nijhof
e8a0abd107
String formatting improvements ( #33635 )
...
* String formatting improvements
* Found another one
2020-04-04 18:21:14 +02:00
Diefferson Koderer Môro
f440259edc
Move imports in seven_segments component ( #28096 )
2019-10-21 22:32:53 -07:00
Paulus Schoutsen
4de97abc3a
Black
2019-07-31 12:25:30 -07:00
Tobias Sauerwein
048b100eea
Clean up docstrings ( #22679 )
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* Clean up docstrings
* Fix long lines
* Fix more docstrings
* Fix more docstrings
* Fix more docstrings
2019-04-03 17:40:03 +02:00
Paulus Schoutsen
f5076188ef
Consolidate all platforms that have no tests ( #22096 )
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* Consolidate
* Fix tests
* Update imports
* Fix import
* Use importlib because integration and package share name
* Fix more tests
* Update .coveragerc and CODEOWNERS
2019-03-16 20:44:05 -07:00
J. Nick Koston