contrib/memory.py
author Phil Cohen <phillco@fb.com>
Sun, 10 Dec 2017 21:57:37 -0800
changeset 35385 469b06b4c3ca
parent 31958 de5c9d0e02ea
child 43076 2372284d9457
permissions -rw-r--r--
tests: add commit hashes to log commands in rebase tests Commit hashes are a useful way to ensure the content of commits made in the tests are not changing, even if we don't query every aspect of every commit. (And some properties, like extras, are rarely printed at all.) Many of the rebase log -G calls didn't show hashes; by adding hashes to places that weren't showing them we can help protect those tests from unwanted changes. Differential Revision: https://phab.mercurial-scm.org/D1650

# memory.py - track memory usage
#
# Copyright 2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''helper extension to measure memory usage

Reads current and peak memory usage from ``/proc/self/status`` and
prints it to ``stderr`` on exit.
'''

from __future__ import absolute_import

def memusage(ui):
    """Report memory usage of the current process."""
    result = {'peak': 0, 'rss': 0}
    with open('/proc/self/status', 'r') as status:
        # This will only work on systems with a /proc file system
        # (like Linux).
        for line in status:
            parts = line.split()
            key = parts[0][2:-1].lower()
            if key in result:
                result[key] = int(parts[1])
    ui.write_err(", ".join(["%s: %.1f MiB" % (k, v / 1024.0)
                            for k, v in result.iteritems()]) + "\n")

def extsetup(ui):
    ui.atexit(memusage, ui)