view contrib/memory.py @ 31282:b9228a2219ca

repofilecache: define a 'join' method

We are about to turn the 'join' method of the base class Abstract, so we need
on to be defined in the localrepo. The ultimate goal here is to be able to stop
relying for the 'localrepo' class to have a 'join' methods (there is above one
hundred methods on 'localrepo'. This change make te 'repo' file cache have its
own code so that we can prepare this change to the repostory class.


explicite join

# memory.py - track memory usage
#
# Copyright 2009 Matt Mackall <[e-mail]> 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
import atexit

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):
    atexit.register(memusage, ui)