When running profiling, users rarely care about the global percentage of
the runtime. Often, they want to select a function and measure child
percentages relative to that.
This PR updates the flamegraph tooltips to show both "Percentage" and
"Relative Percentage" when the user clicks a specific function.
Fix Test_Pep523AllowSpecialization tests of test_capi.test_misc.
On Cygwin, _PyEval_EvalFrameDefault in _testinternalcapi is not the
same as _PyEval_EvalFrameDefault in python.exe. So pass NULL
explicitly to use the default function (_PyEval_EvalFrameDefault).
Co-authored-by: Stan Ulbrych <stan@python.org>
Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Some of these docstrings read as if they were written when typing.py was
first written, and things have evolved since then.
A few motivations:
- Call protocols protocols instead of ABCs. They are also ABCs, but the fact
they are protocols is more relevant to typing.
- Avoid recommending direct use of .__annotations__ and steer users to
annotationlib instead.
- For TypedDict, mention NotRequired before total=False since it is more
general and probably more frequently useful.
- For overloads, mention runtime use first instead of stub use. I think early on
there was talk of allowing overload only in stubs, but it is now heavily used at
runtime too and that's more likely to be relevant to users.
* gh-149819: Fix .pth files not loaded in Python subprocesses
After PR gh-149583 (Fix double evaluation of .pth and .site files in
venvs), .pth files are no longer loaded in subprocesses started with
subprocess.run([sys.executable, ...]). The root cause: main() seeds
known_paths from removeduppaths() with all sys.path entries inherited
from the parent process. addsitedir() then skips .pth processing for
every directory already in known_paths.
Fix:
- main(): call removeduppaths() for dedup but start known_paths as a
fresh empty set, so that addsitedir() processes .pth files in every
site-packages directory regardless of inherited sys.path.
- addsitedir(): move known_paths.add() before the sys.path.append and
guard the append with 'sitedir not in sys.path' to avoid creating
duplicate entries when called with a fresh known_paths.
This preserves the gh-75723 dedup guarantee while allowing subprocesses
to load .pth files.
* Fill out the tests for GH#149888
* Extend _make_start() and _make_pth() to take an optional `basedir` which is used instead of
`site.tmpdir` if given.
* Add test_pth_processed_when_sitedir_already_on_path() to test the core GH#149819 bug: .pth files
in subprocesses aren't handled if PYTHONPATH pointing to the .pth directory is inherited.
* Similarly add test_start_processed_when_sitedir_already_on_path() to verify that .start files in
the same circumstances are also now processed.
* Update Lib/site.py
Co-authored-by: scoder <stefan_ml@behnel.de>
* Oops! Remove redundant code
---------
Co-authored-by: BugBounty Mind <bugbounty-mind@deepseek.tui>
Co-authored-by: scoder <stefan_ml@behnel.de>
ThreadingMock._increment_mock_call() was not thread-safe.
Multiple threads calling the mock simultaneously could lose
increments due to race conditions on call_count and other
attributes.
Fix by overriding _increment_mock_call in ThreadingMixin
and wrapping it with the existing _mock_calls_events_lock.
Use exact remote reads for interpreter state, thread state, and
interpreter frame structs instead of pulling full remote pages into the
profiler page cache. This matches the core change from
python/cpython#149585.
The profiler clears the page cache between samples, so live entries are
always packed at the front. Track the live count and only clear/search
that prefix instead of scanning all 1024 slots on the hot path.
Use the frame cache to predict the next thread state and top frame
address, then batch interpreter/thread/frame reads with process_vm_readv
when profiling a Linux target. Reuse prefetched frame buffers in the
frame walker when the prediction is valid.
Cache the last FrameInfo tuple per code object/instruction offset, reuse
cached thread id objects, and append cached parent frames directly on
full frame-cache hits. This cuts Python allocation churn in the
steady-state profiler path.
---------
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Emma Smith <emma@emmatyping.dev>
Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>
If queue.SimpleQueue.put can't handoff the item to a
waiting thread, and fails to allocate memory when adding
the item to a ringbuf, it would leak a reference. Fixed.
