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#!/usr/bin/env python
# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Counts a resident set size (RSS) of multiple processes without double-counts.
# If they share the same page frame, the page frame is counted only once.
#
# Usage:
# ./multi-process-rss.py <pid>|<pid>r [...]
#
# If <pid> has 'r' at the end, all descendants of the process are accounted.
#
# Example:
# ./multi-process-rss.py 12345 23456r
#
# The command line above counts the RSS of 1) process 12345, 2) process 23456
# and 3) all descendant processes of process 23456.
import collections
import logging
import os
import psutil
import sys
if sys.platform.startswith('linux'):
_TOOLS_PATH = os.path.dirname(os.path.abspath(__file__))
_TOOLS_LINUX_PATH = os.path.join(_TOOLS_PATH, 'linux')
sys.path.append(_TOOLS_LINUX_PATH)
import procfs # pylint: disable=F0401
class _NullHandler(logging.Handler):
def emit(self, record):
pass
_LOGGER = logging.getLogger('multi-process-rss')
_LOGGER.addHandler(_NullHandler())
def _recursive_get_children(pid):
try:
children = psutil.Process(pid).get_children()
except psutil.error.NoSuchProcess:
return []
descendant = []
for child in children:
descendant.append(child.pid)
descendant.extend(_recursive_get_children(child.pid))
return descendant
def list_pids(argv):
pids = []
for arg in argv[1:]:
try:
if arg.endswith('r'):
recursive = True
pid = int(arg[:-1])
else:
recursive = False
pid = int(arg)
except ValueError:
raise SyntaxError("%s is not an integer." % arg)
else:
pids.append(pid)
if recursive:
children = _recursive_get_children(pid)
pids.extend(children)
pids = sorted(set(pids), key=pids.index) # uniq: maybe slow, but simple.
return pids
def count_pageframes(pids):
pageframes = collections.defaultdict(int)
pagemap_dct = {}
for pid in pids:
maps = procfs.ProcMaps.load(pid)
if not maps:
_LOGGER.warning('/proc/%d/maps not found.' % pid)
continue
pagemap = procfs.ProcPagemap.load(pid, maps)
if not pagemap:
_LOGGER.warning('/proc/%d/pagemap not found.' % pid)
continue
pagemap_dct[pid] = pagemap
for pid, pagemap in pagemap_dct.iteritems():
for vma in pagemap.vma_internals.itervalues():
for pageframe, number in vma.pageframes.iteritems():
pageframes[pageframe] += number
return pageframes
def count_statm(pids):
resident = 0
shared = 0
private = 0
for pid in pids:
statm = procfs.ProcStatm.load(pid)
if not statm:
_LOGGER.warning('/proc/%d/statm not found.' % pid)
continue
resident += statm.resident
shared += statm.share
private += (statm.resident - statm.share)
return (resident, shared, private)
def main(argv):
logging_handler = logging.StreamHandler()
logging_handler.setLevel(logging.WARNING)
logging_handler.setFormatter(logging.Formatter(
'%(asctime)s:%(name)s:%(levelname)s:%(message)s'))
_LOGGER.setLevel(logging.WARNING)
_LOGGER.addHandler(logging_handler)
if sys.platform.startswith('linux'):
logging.getLogger('procfs').setLevel(logging.WARNING)
logging.getLogger('procfs').addHandler(logging_handler)
pids = list_pids(argv)
pageframes = count_pageframes(pids)
else:
_LOGGER.error('%s is not supported.' % sys.platform)
return 1
# TODO(dmikurube): Classify this total RSS.
print len(pageframes) * 4096
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
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