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82 gh-136459: Add perf trampoline support for macOS by canova · Pull Request #136461 · python/cpython · GitHub
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gh-136459: Add perf trampoline support for macOS #136461

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Merged
merged 11 commits into from
Jul 22, 2025
Merged

gh-136459: Add perf trampoline support for macOS #136461

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7547a29
Add perf trampoline support for macOS
canova Jul 8, 2025
17df9c8
Make sure that test_perfmaps.py test is not skipped on macOS
canova Jul 8, 2025
3dac7a9
Update the docs for perfmaps to mention that macOS is supported
canova Jul 8, 2025
d428ba4
Add myself to Misc/ACKS
canova Jul 8, 2025
50e80bf
Add a Misc/NEWS.d entry
canova Jul 9, 2025
3f9e24d
Define constants per-platform
canova Jul 9, 2025
dc54659
Do not mmap the jitdump file on macOS
canova Jul 9, 2025
8a20a4b
Update the perf profiling doc to include samply
canova Jul 10, 2025
1432cc8
Add some tests for samply profiling
canova Jul 10, 2025
a7b043d
Apply documentation suggestions from code review
canova Jul 17, 2025
3ae5cb2
Change the version number in the docs and mention macOS restrictions
canova Jul 17, 2025
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Update the docs for perfmaps to mention that macOS is supported
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@canova
canova committed Jul 17, 2025
commit 3dac7a9d81642134ac3be54f5450fde0a7487725
9 changes: 5 additions & 4 deletions Doc/c-api/perfmaps.rst
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Support for Perf Maps
----------------------

On supported platforms (as of this writing, only Linux), the runtime can take
On supported platforms (as of this writing, Linux and macOS), the runtime can take
advantage of *perf map files* to make Python functions visible to an external
profiling tool (such as `perf <https://perf.wiki.kernel.org/index.php/Main_Page>`_).
A running process may create a file in the ``/tmp`` directory, which contains entries
that can map a section of executable code to a name. This interface is described in the
profiling tool (such as `perf <https://perf.wiki.kernel.org/index.php/Main_Page>`_ or
`samply <https://github.com/mstange/samply/>`_). A running process may create a
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I added a shameless plug to samply 😄 Disclaimer: I'm not the maintainer of the project, but the maintainer is my colleague. But it doesn't change the fact that it's an awesome profiler! But I can revert it if you prefer not to include :)

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I am happy with the plug, but this docs are going to need much more than this then. If samply is the main way to use this on macOS then we will need to update https://docs.python.org/3/howto/perf_profiling.html with full instructions for samply :)

file in the ``/tmp`` directory, which contains entries that can map a section
of executable code to a name. This interface is described in the
`documentation of the Linux Perf tool <https://git.kernel.org/pub/scm/linux/
kernel/git/torvalds/linux.git/tree/tools/perf/Documentation/jit-interface.txt>`_.

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