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cpython/Misc
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Sam Gross 6577d870b0
gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554) 
Align the QSBR thread state array to a 64-byte cache line boundary
and add padding at the end of _PyThreadStateImpl. Depending on heap
layout, the QSBR array could end up sharing a cache line with a
thread's tlbc_index, causing QSBR quiescent state updates to contend
with reads of tlbc_index in RESUME_CHECK. This is sensitive to
earlier allocations during interpreter init and can appear or
disappear with seemingly unrelated changes.

Either change alone is sufficient to fix the specific issue, but both
are worthwhile to avoid similar problems in the future.
2026-02-17 11:12:25 -05:00
..
mypy gh-131507: Add support for syntax highlighting in PyREPL (GH-133247) 2025-05-02 20:22:31 +02:00
NEWS.d gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554) 2026-02-17 11:12:25 -05:00
rhel7 gh-95957: Add instructions for Tcl/Tk and OpenSSL on RHEL/CentOS 7 (#95964) 2022-08-16 13:44:02 +02:00
ACKS gh-101178: Add Ascii85, Base85, and Z85 support to binascii (GH-102753) 2026-02-06 16:43:16 +02:00
externals.spdx.json gh-144551: Update Windows builds to use OpenSSL 3.5.5 (GH-144796) 2026-02-13 15:43:05 -06:00
HISTORY gh-123492: Remove unnecessary :func: parentheses (#123493) 2024-08-30 14:34:09 +03:00
indent.pro
libabigail.abignore gh-143253: Add libabigail suppression file for internal types (#143254) 2026-01-12 17:37:43 +02:00
platform_triplet.c gh-132026: Ensure _MIPS_SIM has defined _ABI identifiers for comparison (GH-132027) 2025-04-27 21:56:00 +00:00
Porting
python-config.in bpo-45101: Add consistency in usage message IO between 2 versions of python-config (GH-28162) 2024-02-26 22:04:44 +02:00
python-config.sh.in gh-116622: Rename build variable MODULE_LDFLAGS back to LIBPYTHON (#122764) 2024-08-09 00:00:55 +02:00
python-embed.pc.in
python.man Manpage: -X gil is not related to PYTHON_HISTORY (#133753) 2025-05-09 17:11:21 +03:00
python.pc.in gh-116622: Rename build variable MODULE_LDFLAGS back to LIBPYTHON (#122764) 2024-08-09 00:00:55 +02:00
README gh-124457: Remove coverity from CPython repo (GH-124460) 2024-09-27 13:42:32 -07:00
README.AIX
README.valgrind
sbom.spdx.json gh-144363: Update bundled libexpat to 2.7.4 (#144365) 2026-02-05 13:58:18 +01:00
SpecialBuilds.txt GH-129763: Remove the LLTRACE macro (GH-129764) 2025-02-07 08:49:51 -08:00
stable_abi.toml gh-143869: Add PEP 757 functions to the limited API (#143906) 2026-01-21 14:47:14 +01:00
svnmap.txt
valgrind-python.supp gh-121096: Ignore dlopen() leaks in Valgrind suppression file (#121097) 2024-06-28 13:10:11 +02:00
vgrindefs

README 

Python Misc subdirectory
========================

This directory contains files that wouldn't fit in elsewhere.  Some
documents are only of historic importance.

Files found here
----------------

ACKS                    Acknowledgements
HISTORY                 News from previous releases -- oldest last
indent.pro              GNU indent profile approximating my C style
NEWS                    News for this release (for some meaning of "this")
Porting                 Mini-FAQ on porting to new platforms
python-config.in        Python script template for python-config
python.man              UNIX man page for the python interpreter
python.pc.in            Package configuration info template for pkg-config
README                  The file you're reading now
README.AIX              Information about using Python on AIX
README.valgrind         Information for Valgrind users, see valgrind-python.supp
SpecialBuilds.txt       Describes extra symbols you can set for debug builds
svnmap.txt              Map of old SVN revs and branches to hg changeset ids,
                        help history-digging
valgrind-python.supp    Valgrind suppression file, see README.valgrind
vgrindefs               Python configuration for vgrind (a generic pretty printer)