contrib/memory.py
author Gregory Szorc <gregory.szorc@gmail.com>
Fri, 06 Nov 2020 13:58:59 -0800
changeset 45830 c102b704edb5
parent 43076 2372284d9457
child 46819 d4ba4d51f85f
permissions -rw-r--r--
global: use python3 in shebangs Python 3 is the future. We want Python scripts to be using Python 3 by default. This change updates all `#!/usr/bin/env python` shebangs to use `python3`. Does this mean all scripts use or require Python 3: no. In the test environment, the `PATH` environment variable in tests is updated to guarantee that the Python executable used to run run-tests.py is used. Since test scripts all now use `#!/usr/bin/env python3`, we had to update this code to install a `python3` symlink instead of `python`. It is possible there are some random scripts now executed with the incorrect Python interpreter in some contexts. However, I would argue that this was a pre-existing bug: we should almost always be executing new Python processes using the `sys.executable` from the originating Python script, as `python` or `python3` won't guarantee we'll use the same interpreter. Differential Revision: https://phab.mercurial-scm.org/D9273
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# memory.py - track memory usage
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#
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# Copyright 2009 Matt Mackall <mpm@selenic.com> and others
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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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'''helper extension to measure memory usage
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Reads current and peak memory usage from ``/proc/self/status`` and
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prints it to ``stderr`` on exit.
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'''
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from __future__ import absolute_import
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def memusage(ui):
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    """Report memory usage of the current process."""
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    result = {'peak': 0, 'rss': 0}
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    with open('/proc/self/status', 'r') as status:
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        # This will only work on systems with a /proc file system
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        # (like Linux).
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        for line in status:
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            parts = line.split()
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            key = parts[0][2:-1].lower()
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            if key in result:
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                result[key] = int(parts[1])
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    ui.write_err(
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        ", ".join(
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            ["%s: %.1f MiB" % (k, v / 1024.0) for k, v in result.iteritems()]
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        )
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        + "\n"
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    )
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def extsetup(ui):
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    ui.atexit(memusage, ui)