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# 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.
from collections import defaultdict
try:
import resource # pylint: disable=F0401
except ImportError:
resource = None # Not available on all platforms
def _ConvertKbToByte(value):
return int(value.replace('kB','')) * 1024
def _GetProcFileDict(contents):
retval = {}
for line in contents.splitlines():
key, value = line.split(':')
retval[key.strip()] = value.strip()
return retval
def GetSystemCommitCharge(meminfo_contents):
meminfo = _GetProcFileDict(meminfo_contents)
return (_ConvertKbToByte(meminfo['MemTotal'])
- _ConvertKbToByte(meminfo['MemFree'])
- _ConvertKbToByte(meminfo['Buffers'])
- _ConvertKbToByte(meminfo['Cached']))
def GetMemoryStats(status_contents, stats):
status = _GetProcFileDict(status_contents)
if not status or not stats or 'Z' in status['State']:
return {}
return {'VM': int(stats[22]),
'VMPeak': _ConvertKbToByte(status['VmPeak']),
'WorkingSetSize': int(stats[23]) * resource.getpagesize(),
'WorkingSetSizePeak': _ConvertKbToByte(status['VmHWM'])}
def GetIOStats(io_contents):
io = _GetProcFileDict(io_contents)
return {'ReadOperationCount': int(io['syscr']),
'WriteOperationCount': int(io['syscw']),
'ReadTransferCount': int(io['rchar']),
'WriteTransferCount': int(io['wchar'])}
def GetChildPids(processes, pid):
child_dict = defaultdict(list)
for curr_pid, curr_ppid, state in processes:
if 'Z' in state:
continue # Ignore zombie processes
child_dict[int(curr_ppid)].append(int(curr_pid))
queue = [pid]
child_ids = []
while queue:
parent = queue.pop()
if parent in child_dict:
children = child_dict[parent]
queue.extend(children)
child_ids.extend(children)
return child_ids
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