upstream/mercurial-mirror Files · contrib/memory.py

rhg: use `Command::exec` instead of `Command::status`...

rhg: use `Command::exec` instead of `Command::status` `rhg` is supposed to be a transparent executable, using a subprocess defeats that purpose. See inline comments for more details. This also introduces the `which` crate to check if the fallback executable actually exists to help debugging (plain `execve` doesn't give much information). The error code 253 is used to signify that the fallback is not found, but may mean in the future that it is otherwise invalid if we start being more specific. Differential Revision: https://phab.mercurial-scm.org/D12578

Gregory Szorc - - Load All Authors

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      # memory.py - track memory usage

      #

      # Copyright 2009 Olivia Mackall <olivia@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)

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				# memory.py - track memory usage
				#
				# Copyright 2009 Olivia Mackall <olivia@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)