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d030a5b054
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@2164 e7d03fd6-7b0d-0410-9947-9c21f3af8025
75 lines
1.6 KiB
Python
75 lines
1.6 KiB
Python
# -*- coding: iso-8859-1 -*-
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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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"""
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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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"""
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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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"""
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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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"""
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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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