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90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright: Jean Brouwers
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# License:
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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Copied from the Python Cookbook recipe at
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286222
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To find the memory usage in a particular section of code these
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functions are typically used as follows::
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m0 = memory()
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...
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m1 = memory(m0)
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"""
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import os
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_proc_status = '/proc/%d/status' % os.getpid()
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_scale = {'kB': 1024.0, 'mB': 1024.0*1024.0,
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'KB': 1024.0, 'MB': 1024.0*1024.0}
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def _VmB (VmKey):
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"""Parse /proc/<pid>/status file for given key.
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@return: requested number value of status entry
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@rtype: float
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"""
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if os.name != 'posix':
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# not supported
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return 0.0
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global _proc_status, _scale
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# get pseudo file /proc/<pid>/status
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try:
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t = open(_proc_status)
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v = t.read()
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t.close()
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except IOError:
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# unsupported platform (non-Linux?)
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return 0.0
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# get VmKey line e.g. 'VmRSS: 9999 kB\n ...'
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i = v.index(VmKey)
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v = v[i:].split(None, 3) # whitespace
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if len(v) < 3:
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return 0.0 # invalid format?
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# convert Vm value to bytes
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return float(v[1]) * _scale[v[2]]
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def memory (since=0.0):
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"""Get memory usage.
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@return: memory usage in bytes
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@rtype: float
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"""
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return _VmB('VmSize:') - since
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def resident (since=0.0):
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"""Get resident memory usage.
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@return: resident memory usage in bytes
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@rtype: float
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"""
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return _VmB('VmRSS:') - since
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def stacksize (since=0.0):
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"""Get stack size.
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@return: stack size in bytes
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@rtype: float
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"""
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return _VmB('VmStk:') - since
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