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6f1efddaa4
Summary: Update the traceprof contextmanager to always print the profile information, even when exiting due to an exception. In particular, this fixes the behavior so that we report profiling information even if a slow command is interrupted with Ctrl-C. This also matches the behavior of the upstream statprof profiler. Test Plan: Confirmed that a profile was printed when interrupting a long-running `hg log -f` command in a large repository. Reviewers: quark, #fbhgext Reviewed By: quark, #fbhgext Differential Revision: https://phab.mercurial-scm.org/D386
68 lines
1.7 KiB
Cython
68 lines
1.7 KiB
Cython
# distutils: language = c++
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# traceprof.pyx - C++ to Python bridge for the traceprof Mercurial extension
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#
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# Copyright 2017 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""accurate callgraph profiling
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lsprof's high precision, plus statprof's intuitive output format.
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Config::
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[traceprof]
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# whether to disable Python GC before profiling
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disablegc = no
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# minimal microseconds to show a function
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timethreshold = 2000
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# minimal call count to show "(N times)"
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countthreshold = 2
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# frame de-duplication (slower to print outputs)
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framededup = yes
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"""
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from libc.stdio cimport FILE
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from cpython.object cimport PyObject
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import contextlib
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import gc
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cdef extern from "traceprofimpl.cpp":
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void enable()
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void disable()
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void report(FILE *)
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void settimethreshold(double)
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void setcountthreshold(size_t)
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void setdedup(int)
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void clear()
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cdef extern from "Python.h":
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FILE* PyFile_AsFile(PyObject *p)
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@contextlib.contextmanager
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def profile(ui, fp):
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if ui is not None:
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if ui.configbool('traceprof', 'disablegc'):
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gc.disable() # slightly more predictable
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microseconds = ui.configint('traceprof', 'timethreshold')
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if microseconds is not None:
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settimethreshold((<double>microseconds) / 1000.0)
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count = ui.configint('traceprof', 'countthreshold')
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if count is not None:
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setcountthreshold(count)
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dedup = ui.configbool('traceprof', 'framededup', True)
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setdedup(<int>dedup)
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enable()
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try:
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yield
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finally:
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disable()
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report(PyFile_AsFile(<PyObject *>fp))
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clear()
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