view contrib/memory.py @ 35783:c97639ad6874

bundle2: specify what capabilities will be used for

We currently assume there is a symmetric relationship of bundle2
capabilities between client and server. However, this may not always be
the case.

We need a bundle2 capability to advertise bundle2 streaming clone support
on servers to differentiate it from the existing, legacy streaming clone
support.

However, servers may wish to disable streaming clone support. If bundle2
capabilities were the same between client and server, a client (which
may also be a server) that has disabled streaming clone support would
not be able to perform a streaming clone itself!

This commit introduces a "role" argument to bundle2.getrepocaps() that
explicitly defines the role being performed. This will allow us (and
extensions) to alter bundle2 capabilities depending on the operation
being performed.

Differential Revision: https://phab.mercurial-scm.org/D1923

# 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

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)