view contrib/memory.py @ 23651:72da02d7f126

merge: collect checking for unknown files at end of manifestmerge()

The 'c' and 'dc' actions include creating a file on disk and we need
to check that no conflicting file exists unless force=True. Move two
of the calls to _checkunknownfile() to a single place at the end of
manifestmerge(). This removes some of the reading of filelogs from the
heart of manifestmerge() and collects it in one place close to where
its output (entries in the 'aborts' list) is used.

Note that this removes the unnecessary call to _checkunknownfile()
when force=True in one of the code paths.

# 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.
'''

import atexit

def memusage(ui):
    """Report memory usage of the current process."""
    status = None
    result = {'peak': 0, 'rss': 0}
    try:
        # This will only work on systems with a /proc file system
        # (like Linux).
        status = open('/proc/self/status', 'r')
        for line in status:
            parts = line.split()
            key = parts[0][2:-1].lower()
            if key in result:
                result[key] = int(parts[1])
    finally:
        if status is not None:
            status.close()
    ui.write_err(", ".join(["%s: %.1f MiB" % (key, value / 1024.0)
                            for key, value in result.iteritems()]) + "\n")

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