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#!/usr/bin/env python
#
# $Id: _linux.py 1498 2012-07-24 21:41:28Z g.rodola $
#
# Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Linux specific tests. These are implicitly run by test_psutil.py."""
from __future__ import division
import unittest
import subprocess
import sys
import time
import os
from test_psutil import sh, get_test_subprocess
from psutil._compat import PY3
import psutil
TOLERANCE = 200 * 1024 # 200 KB
class LinuxSpecificTestCase(unittest.TestCase):
def assert_eq_w_tol(self, first, second, tolerance):
difference = abs(first - second)
if difference <= tolerance:
return
msg = '%r != %r within %r delta (%r difference)' \
% (first, second, tolerance, difference)
raise AssertionError(msg)
def test_disks(self):
# test psutil.disk_usage() and psutil.disk_partitions()
# against "df -a"
def df(path):
out = sh('df -P -B 1 "%s"' % path).strip()
lines = out.split('\n')
lines.pop(0)
line = lines.pop(0)
dev, total, used, free = line.split()[:4]
if dev == 'none':
dev = ''
total, used, free = int(total), int(used), int(free)
return dev, total, used, free
for part in psutil.disk_partitions(all=False):
usage = psutil.disk_usage(part.mountpoint)
dev, total, used, free = df(part.mountpoint)
self.assertEqual(part.device, dev)
self.assertEqual(usage.total, total)
# 10 MB tollerance
if abs(usage.free - free) > 10 * 1024 * 1024:
self.fail("psutil=%s, df=%s" % (usage.free, free))
if abs(usage.used - used) > 10 * 1024 * 1024:
self.fail("psutil=%s, df=%s" % (usage.used, used))
def test_memory_maps(self):
sproc = get_test_subprocess()
time.sleep(1)
p = psutil.Process(sproc.pid)
maps = p.get_memory_maps(grouped=False)
pmap = sh('pmap -x %s' % p.pid).split('\n')
del pmap[0]; del pmap[0] # get rid of header
while maps and pmap:
this = maps.pop(0)
other = pmap.pop(0)
addr, _, rss, dirty, mode, path = other.split(None, 5)
if not path.startswith('[') and not path.endswith(']'):
self.assertEqual(path, os.path.basename(this.path))
self.assertEqual(int(rss) * 1024, this.rss)
# test only rwx chars, ignore 's' and 'p'
self.assertEqual(mode[:3], this.perms[:3])
def test_vmem_total(self):
lines = sh('free').split('\n')[1:]
total = int(lines[0].split()[1]) * 1024
self.assertEqual(total, psutil.virtual_memory().total)
def test_vmem_used(self):
lines = sh('free').split('\n')[1:]
used = int(lines[0].split()[2]) * 1024
self.assert_eq_w_tol(used, psutil.virtual_memory().used, TOLERANCE)
def test_vmem_free(self):
lines = sh('free').split('\n')[1:]
free = int(lines[0].split()[3]) * 1024
self.assert_eq_w_tol(free, psutil.virtual_memory().free, TOLERANCE)
def test_vmem_buffers(self):
lines = sh('free').split('\n')[1:]
buffers = int(lines[0].split()[5]) * 1024
self.assert_eq_w_tol(buffers, psutil.virtual_memory().buffers, TOLERANCE)
def test_vmem_cached(self):
lines = sh('free').split('\n')[1:]
cached = int(lines[0].split()[6]) * 1024
self.assert_eq_w_tol(cached, psutil.virtual_memory().cached, TOLERANCE)
def test_swapmem_total(self):
lines = sh('free').split('\n')[1:]
total = int(lines[2].split()[1]) * 1024
self.assertEqual(total, psutil.swap_memory().total)
def test_swapmem_used(self):
lines = sh('free').split('\n')[1:]
used = int(lines[2].split()[2]) * 1024
self.assert_eq_w_tol(used, psutil.swap_memory().used, TOLERANCE)
def test_swapmem_free(self):
lines = sh('free').split('\n')[1:]
free = int(lines[2].split()[3]) * 1024
self.assert_eq_w_tol(free, psutil.swap_memory().free, TOLERANCE)
if __name__ == '__main__':
test_suite = unittest.TestSuite()
test_suite.addTest(unittest.makeSuite(LinuxSpecificTestCase))
unittest.TextTestRunner(verbosity=2).run(test_suite)
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