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2to3.html
63.71
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__builtin__.html
11.79
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__future__.html
15.58
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__main__.html
8.33
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_winreg.html
73.99
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abc.html
26.82
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aepack.html
15.47
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aetools.html
18.79
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aetypes.html
27.08
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aifc.html
29.59
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al.html
22.13
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allos.html
35.48
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anydbm.html
19.31
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archiving.html
10.64
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argparse.html
269.59
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array.html
35.35
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ast.html
42.42
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asynchat.html
35.84
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asyncore.html
43.22
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atexit.html
19.23
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audioop.html
41.32
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autogil.html
9.77
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base64.html
24.8
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basehttpserver.html
40.6
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bastion.html
13.02
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bdb.html
50.06
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binascii.html
26.64
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binhex.html
12.66
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bisect.html
28.52
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bsddb.html
32.02
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bz2.html
31.92
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calendar.html
50.16
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carbon.html
54.14
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cd.html
35.24
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cgi.html
58.4
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cgihttpserver.html
15.12
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cgitb.html
13.5
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chunk.html
17.41
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cmath.html
32.41
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cmd.html
32.69
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code.html
28.92
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codecs.html
125.92
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codeop.html
16.42
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collections.html
150.36
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colorpicker.html
9.02
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colorsys.html
14.38
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commands.html
16.63
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compileall.html
21.18
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compiler.html
78.14
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configparser.html
73.92
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constants.html
14.68
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contextlib.html
22.91
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cookie.html
45.38
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cookielib.html
102.78
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copy.html
14.21
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copy_reg.html
15.82
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crypt.html
11.62
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crypto.html
8.35
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csv.html
82.79
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ctypes.html
280.57
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curses.ascii.html
28.97
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curses.html
200.94
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curses.panel.html
18.43
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custominterp.html
8.59
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datatypes.html
18.84
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datetime.html
261.02
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dbhash.html
18.4
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dbm.html
14.75
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debug.html
11.28
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decimal.html
239.14
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development.html
15.27
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difflib.html
96.93
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dircache.html
13.66
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dis.html
96.52
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distribution.html
8.27
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distutils.html
10.97
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dl.html
19.27
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doctest.html
193.18
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docxmlrpcserver.html
20.02
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dumbdbm.html
16.74
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dummy_thread.html
11.04
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dummy_threading.html
9.96
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easydialogs.html
38.83
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email-examples.html
47.2
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email.charset.html
32.45
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email.encoders.html
14.09
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email.errors.html
19.2
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email.generator.html
24.78
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email.header.html
31.12
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email.html
55.3
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email.iterators.html
14.22
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email.message.html
74.91
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email.mime.html
34.51
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email.parser.html
37.09
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email.utils.html
30.04
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ensurepip.html
20.21
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errno.html
52.31
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exceptions.html
73.4
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fcntl.html
27.85
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filecmp.html
26.49
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fileformats.html
10.21
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fileinput.html
29.36
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filesys.html
11.55
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fl.html
71.58
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fm.html
15
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fnmatch.html
17.78
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formatter.html
43.91
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fpectl.html
17.84
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fpformat.html
12.65
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fractions.html
27.17
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framework.html
44.24
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frameworks.html
8.11
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ftplib.html
56.56
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functions.html
216.84
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functools.html
31.06
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future_builtins.html
15.9
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gc.html
30.74
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gdbm.html
19.35
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gensuitemodule.html
14.54
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getopt.html
26.56
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getpass.html
12.5
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gettext.html
91.32
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gl.html
26.71
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glob.html
15.42
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grp.html
12.33
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gzip.html
21.95
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hashlib.html
27.4
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heapq.html
36.72
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hmac.html
15.97
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hotshot.html
22.69
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htmllib.html
29.9
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htmlparser.html
45.11
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httplib.html
78.55
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i18n.html
10.61
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ic.html
22.03
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idle.html
45.74
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imageop.html
20.94
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imaplib.html
69.9
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imgfile.html
14.91
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imghdr.html
13.43
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imp.html
41.48
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importlib.html
10.27
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imputil.html
36.11
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index.html
82.54
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inspect.html
64.31
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internet.html
26.77
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intro.html
9.76
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io.html
122.3
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ipc.html
17.18
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itertools.html
129.91
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jpeg.html
15.36
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json.html
79.09
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keyword.html
9.27
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language.html
12.35
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linecache.html
12.7
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locale.html
68.54
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logging.config.html
82.23
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logging.handlers.html
91.96
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logging.html
123.15
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mac.html
24.49
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macos.html
18.51
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macosa.html
14.55
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macostools.html
19.67
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macpath.html
9.19
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mailbox.html
185.53
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mailcap.html
15.3
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markup.html
20.37
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marshal.html
19.88
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math.html
50.52
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md5.html
16.65
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mhlib.html
30.04
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mimetools.html
23.84
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mimetypes.html
35.82
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mimewriter.html
18.19
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mimify.html
16.96
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miniaeframe.html
14.5
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misc.html
7.77
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mm.html
10.19
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mmap.html
33.52
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modulefinder.html
19.85
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modules.html
9.68
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msilib.html
72.78
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msvcrt.html
24.1
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multifile.html
28.82
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multiprocessing.html
423.97
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mutex.html
13.56
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netdata.html
19.28
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netrc.html
15.51
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new.html
16.1
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nis.html
13.19
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nntplib.html
51.08
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numbers.html
40.91
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numeric.html
14.85
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operator.html
118.32
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optparse.html
251.08
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os.html
270.49
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os.path.html
48.87
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ossaudiodev.html
49.79
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othergui.html
9.98
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parser.html
44.52
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pdb.html
41.44
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persistence.html
16.25
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pickle.html
107.94
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pickletools.html
13.21
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pipes.html
21.85
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pkgutil.html
30.59
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platform.html
40.14
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plistlib.html
20.96
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popen2.html
30.13
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poplib.html
27.93
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posix.html
17.27
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posixfile.html
23.68
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pprint.html
36.42
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profile.html
76.65
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pty.html
11.42
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pwd.html
13.53
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py_compile.html
13.33
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pyclbr.html
18.14
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pydoc.html
14.33
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pyexpat.html
93.28
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python.html
13.53
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queue.html
29.64
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quopri.html
14.5
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random.html
47.78
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re.html
163.11
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readline.html
41.2
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repr.html
24.57
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resource.html
30.86
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restricted.html
12.69
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rexec.html
43.59
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rfc822.html
51.25
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rlcompleter.html
15.29
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robotparser.html
15.01
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runpy.html
23.55
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sched.html
21.76
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scrolledtext.html
10.67
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select.html
50.17
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sets.html
39.92
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sgi.html
11.09
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sgmllib.html
38.77
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sha.html
14.55
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shelve.html
32.93
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shlex.html
38.43
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shutil.html
49.49
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signal.html
36.52
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simplehttpserver.html
21.57
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simplexmlrpcserver.html
40.41
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site.html
29
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smtpd.html
15.64
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smtplib.html
51.86
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sndhdr.html
12.05
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socket.html
126.94
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socketserver.html
81.38
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someos.html
17.09
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spwd.html
12.25
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sqlite3.html
154.12
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ssl.html
214.5
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stat.html
41.11
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statvfs.html
13.24
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stdtypes.html
309.83
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string.html
129.58
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stringio.html
21.1
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stringprep.html
21.4
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strings.html
16.42
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struct.html
47.68
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subprocess.html
117
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sun.html
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sunau.html
35.43
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sunaudio.html
21.05
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symbol.html
9.06
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symtable.html
29.03
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sys.html
118.12
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sysconfig.html
28.8
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syslog.html
21.29
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tabnanny.html
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tarfile.html
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telnetlib.html
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tempfile.html
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termios.html
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test.html
61.42
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textwrap.html
32.28
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thread.html
22.67
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threading.html
92.04
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time.html
65.55
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timeit.html
44.38
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tix.html
56.73
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tk.html
26.76
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tkinter.html
86.67
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token.html
27.31
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tokenize.html
21.69
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trace.html
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traceback.html
44.22
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ttk.html
123.83
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tty.html
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turtle.html
246.17
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types.html
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undoc.html
25.54
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unicodedata.html
22.64
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unittest.html
246.75
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unix.html
11.9
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urllib.html
71.61
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urllib2.html
128.77
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urlparse.html
49.04
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user.html
13.41
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userdict.html
32.96
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uu.html
13.25
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uuid.html
33.55
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warnings.html
51.86
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wave.html
29.08
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weakref.html
41.14
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webbrowser.html
29.53
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whichdb.html
10.44
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windows.html
10.37
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winsound.html
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wsgiref.html
94.38
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xdrlib.html
38.05
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xml.dom.html
110.39
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xml.dom.minidom.html
45.23
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xml.dom.pulldom.html
16.32
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xml.etree.elementtree.html
124.2
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xml.html
18.76
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xml.sax.handler.html
47.5
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xml.sax.html
26.04
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xml.sax.reader.html
51.4
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xml.sax.utils.html
18.11
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xmlrpclib.html
71.79
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zipfile.html
67.26
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zipimport.html
24.32
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zlib.html
34.41
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You should install the python3 and python3-doc packages and read the <a href="file:///usr/share/doc/python3-doc/html/library/resource.html"> Python documentation for the Python3 version packaged in this release</a>. </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="nis.html" title="36.14. nis — Interface to Sun’s NIS (Yellow Pages)" accesskey="N">next</a> |</li> <li class="right" > <a href="posixfile.html" title="36.12. posixfile — File-like objects with locking support" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.18 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="unix.html" accesskey="U"><span class="section-number">36. </span>Unix Specific Services</a> »</li> <li class="nav-item nav-item-this"><a href=""><span class="section-number">36.13. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">resource</span></code> — Resource usage information</a></li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <section id="module-resource"> <span id="resource-resource-usage-information"></span><h1><span class="section-number">36.13. </span><a class="reference internal" href="#module-resource" title="resource: An interface to provide resource usage information on the current process. (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">resource</span></code></a> — Resource usage information<a class="headerlink" href="#module-resource" title="Permalink to this headline">¶</a></h1> <p>This module provides basic mechanisms for measuring and controlling system resources utilized by a program.</p> <p>Symbolic constants are used to specify particular system resources and to request usage information about either the current process or its children.</p> <p>A single exception is defined for errors:</p> <dl class="py exception"> <dt class="sig sig-object py" id="resource.error"> <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">error</span></span><a class="headerlink" href="#resource.error" title="Permalink to this definition">¶</a></dt> <dd><p>The functions described below may raise this error if the underlying system call failures unexpectedly.</p> </dd></dl> <section id="resource-limits"> <h2><span class="section-number">36.13.1. </span>Resource Limits<a class="headerlink" href="#resource-limits" title="Permalink to this headline">¶</a></h2> <p>Resources usage can be limited using the <a class="reference internal" href="#resource.setrlimit" title="resource.setrlimit"><code class="xref py py-func docutils literal notranslate"><span class="pre">setrlimit()</span></code></a> function described below. Each resource is controlled by a pair of limits: a soft limit and a hard limit. The soft limit is the current limit, and may be lowered or raised by a process over time. The soft limit can never exceed the hard limit. The hard limit can be lowered to any value greater than the soft limit, but not raised. (Only processes with the effective UID of the super-user can raise a hard limit.)</p> <p>The specific resources that can be limited are system dependent. They are described in the <em class="manpage">getrlimit(2)</em> man page. The resources listed below are supported when the underlying operating system supports them; resources which cannot be checked or controlled by the operating system are not defined in this module for those platforms.</p> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIM_INFINITY"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIM_INFINITY</span></span><a class="headerlink" href="#resource.RLIM_INFINITY" title="Permalink to this definition">¶</a></dt> <dd><p>Constant used to represent the limit for an unlimited resource.</p> </dd></dl> <dl class="py function"> <dt class="sig sig-object py" id="resource.getrlimit"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">getrlimit</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">resource</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#resource.getrlimit" title="Permalink to this definition">¶</a></dt> <dd><p>Returns a tuple <code class="docutils literal notranslate"><span class="pre">(soft,</span> <span class="pre">hard)</span></code> with the current soft and hard limits of <em>resource</em>. Raises <code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code> if an invalid resource is specified, or <a class="reference internal" href="#resource.error" title="resource.error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">error</span></code></a> if the underlying system call fails unexpectedly.</p> </dd></dl> <dl class="py function"> <dt class="sig sig-object py" id="resource.setrlimit"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">setrlimit</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">resource</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">limits</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#resource.setrlimit" title="Permalink to this definition">¶</a></dt> <dd><p>Sets new limits of consumption of <em>resource</em>. The <em>limits</em> argument must be a tuple <code class="docutils literal notranslate"><span class="pre">(soft,</span> <span class="pre">hard)</span></code> of two integers describing the new limits. A value of <a class="reference internal" href="#resource.RLIM_INFINITY" title="resource.RLIM_INFINITY"><code class="xref py py-data docutils literal notranslate"><span class="pre">RLIM_INFINITY</span></code></a> can be used to request a limit that is unlimited.</p> <p>Raises <code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code> if an invalid resource is specified, if the new soft limit exceeds the hard limit, or if a process tries to raise its hard limit. Specifying a limit of <a class="reference internal" href="#resource.RLIM_INFINITY" title="resource.RLIM_INFINITY"><code class="xref py py-data docutils literal notranslate"><span class="pre">RLIM_INFINITY</span></code></a> when the hard or system limit for that resource is not unlimited will result in a <code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code>. A process with the effective UID of super-user can request any valid limit value, including unlimited, but <code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code> will still be raised if the requested limit exceeds the system imposed limit.</p> <p><code class="docutils literal notranslate"><span class="pre">setrlimit</span></code> may also raise <a class="reference internal" href="#resource.error" title="resource.error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">error</span></code></a> if the underlying system call fails.</p> </dd></dl> <p>These symbols define resources whose consumption can be controlled using the <a class="reference internal" href="#resource.setrlimit" title="resource.setrlimit"><code class="xref py py-func docutils literal notranslate"><span class="pre">setrlimit()</span></code></a> and <a class="reference internal" href="#resource.getrlimit" title="resource.getrlimit"><code class="xref py py-func docutils literal notranslate"><span class="pre">getrlimit()</span></code></a> functions described below. The values of these symbols are exactly the constants used by C programs.</p> <p>The Unix man page for <em class="manpage">getrlimit(2)</em> lists the available resources. Note that not all systems use the same symbol or same value to denote the same resource. This module does not attempt to mask platform differences — symbols not defined for a platform will not be available from this module on that platform.</p> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_CORE"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_CORE</span></span><a class="headerlink" href="#resource.RLIMIT_CORE" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum size (in bytes) of a core file that the current process can create. This may result in the creation of a partial core file if a larger core would be required to contain the entire process image.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_CPU"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_CPU</span></span><a class="headerlink" href="#resource.RLIMIT_CPU" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum amount of processor time (in seconds) that a process can use. If this limit is exceeded, a <code class="xref py py-const docutils literal notranslate"><span class="pre">SIGXCPU</span></code> signal is sent to the process. (See the <a class="reference internal" href="signal.html#module-signal" title="signal: Set handlers for asynchronous events."><code class="xref py py-mod docutils literal notranslate"><span class="pre">signal</span></code></a> module documentation for information about how to catch this signal and do something useful, e.g. flush open files to disk.)</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_FSIZE"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_FSIZE</span></span><a class="headerlink" href="#resource.RLIMIT_FSIZE" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum size of a file which the process may create.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_DATA"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_DATA</span></span><a class="headerlink" href="#resource.RLIMIT_DATA" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum size (in bytes) of the process’s heap.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_STACK"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_STACK</span></span><a class="headerlink" href="#resource.RLIMIT_STACK" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum size (in bytes) of the call stack for the current process. This only affects the stack of the main thread in a multi-threaded process.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_RSS"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_RSS</span></span><a class="headerlink" href="#resource.RLIMIT_RSS" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum resident set size that should be made available to the process.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_NPROC"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_NPROC</span></span><a class="headerlink" href="#resource.RLIMIT_NPROC" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum number of processes the current process may create.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_NOFILE"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_NOFILE</span></span><a class="headerlink" href="#resource.RLIMIT_NOFILE" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum number of open file descriptors for the current process.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_OFILE"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_OFILE</span></span><a class="headerlink" href="#resource.RLIMIT_OFILE" title="Permalink to this definition">¶</a></dt> <dd><p>The BSD name for <a class="reference internal" href="#resource.RLIMIT_NOFILE" title="resource.RLIMIT_NOFILE"><code class="xref py py-const docutils literal notranslate"><span class="pre">RLIMIT_NOFILE</span></code></a>.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_MEMLOCK"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_MEMLOCK</span></span><a class="headerlink" href="#resource.RLIMIT_MEMLOCK" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum address space which may be locked in memory.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_VMEM"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_VMEM</span></span><a class="headerlink" href="#resource.RLIMIT_VMEM" title="Permalink to this definition">¶</a></dt> <dd><p>The largest area of mapped memory which the process may occupy.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RLIMIT_AS"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RLIMIT_AS</span></span><a class="headerlink" href="#resource.RLIMIT_AS" title="Permalink to this definition">¶</a></dt> <dd><p>The maximum area (in bytes) of address space which may be taken by the process.</p> </dd></dl> </section> <section id="resource-usage"> <h2><span class="section-number">36.13.2. </span>Resource Usage<a class="headerlink" href="#resource-usage" title="Permalink to this headline">¶</a></h2> <p>These functions are used to retrieve resource usage information:</p> <dl class="py function"> <dt class="sig sig-object py" id="resource.getrusage"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">getrusage</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">who</span></span></em><span class="sig-paren">)</span><a class="headerlink" href="#resource.getrusage" title="Permalink to this definition">¶</a></dt> <dd><p>This function returns an object that describes the resources consumed by either the current process or its children, as specified by the <em>who</em> parameter. The <em>who</em> parameter should be specified using one of the <code class="xref py py-const docutils literal notranslate"><span class="pre">RUSAGE_*</span></code> constants described below.</p> <p>The fields of the return value each describe how a particular system resource has been used, e.g. amount of time spent running is user mode or number of times the process was swapped out of main memory. Some values are dependent on the clock tick internal, e.g. the amount of memory the process is using.</p> <p>For backward compatibility, the return value is also accessible as a tuple of 16 elements.</p> <p>The fields <code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_utime</span></code> and <code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_stime</span></code> of the return value are floating point values representing the amount of time spent executing in user mode and the amount of time spent executing in system mode, respectively. The remaining values are integers. Consult the <em class="manpage">getrusage(2)</em> man page for detailed information about these values. A brief summary is presented here:</p> <table class="docutils align-default"> <colgroup> <col style="width: 13%" /> <col style="width: 35%" /> <col style="width: 52%" /> </colgroup> <thead> <tr class="row-odd"><th class="head"><p>Index</p></th> <th class="head"><p>Field</p></th> <th class="head"><p>Resource</p></th> </tr> </thead> <tbody> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">0</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_utime</span></code></p></td> <td><p>time in user mode (float)</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">1</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_stime</span></code></p></td> <td><p>time in system mode (float)</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">2</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_maxrss</span></code></p></td> <td><p>maximum resident set size</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">3</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_ixrss</span></code></p></td> <td><p>shared memory size</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">4</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_idrss</span></code></p></td> <td><p>unshared memory size</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">5</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_isrss</span></code></p></td> <td><p>unshared stack size</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">6</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_minflt</span></code></p></td> <td><p>page faults not requiring I/O</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">7</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_majflt</span></code></p></td> <td><p>page faults requiring I/O</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">8</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_nswap</span></code></p></td> <td><p>number of swap outs</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">9</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_inblock</span></code></p></td> <td><p>block input operations</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">10</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_oublock</span></code></p></td> <td><p>block output operations</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">11</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_msgsnd</span></code></p></td> <td><p>messages sent</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">12</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_msgrcv</span></code></p></td> <td><p>messages received</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">13</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_nsignals</span></code></p></td> <td><p>signals received</p></td> </tr> <tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">14</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_nvcsw</span></code></p></td> <td><p>voluntary context switches</p></td> </tr> <tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">15</span></code></p></td> <td><p><code class="xref py py-attr docutils literal notranslate"><span class="pre">ru_nivcsw</span></code></p></td> <td><p>involuntary context switches</p></td> </tr> </tbody> </table> <p>This function will raise a <code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code> if an invalid <em>who</em> parameter is specified. It may also raise <a class="reference internal" href="#resource.error" title="resource.error"><code class="xref py py-exc docutils literal notranslate"><span class="pre">error</span></code></a> exception in unusual circumstances.</p> <div class="versionchanged"> <p><span class="versionmodified changed">Changed in version 2.3: </span>Added access to values as attributes of the returned object.</p> </div> </dd></dl> <dl class="py function"> <dt class="sig sig-object py" id="resource.getpagesize"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">getpagesize</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#resource.getpagesize" title="Permalink to this definition">¶</a></dt> <dd><p>Returns the number of bytes in a system page. (This need not be the same as the hardware page size.)</p> </dd></dl> <p>The following <code class="xref py py-const docutils literal notranslate"><span class="pre">RUSAGE_*</span></code> symbols are passed to the <a class="reference internal" href="#resource.getrusage" title="resource.getrusage"><code class="xref py py-func docutils literal notranslate"><span class="pre">getrusage()</span></code></a> function to specify which processes information should be provided for.</p> <dl class="py data"> <dt class="sig sig-object py" id="resource.RUSAGE_SELF"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RUSAGE_SELF</span></span><a class="headerlink" href="#resource.RUSAGE_SELF" title="Permalink to this definition">¶</a></dt> <dd><p><a class="reference internal" href="#resource.RUSAGE_SELF" title="resource.RUSAGE_SELF"><code class="xref py py-const docutils literal notranslate"><span class="pre">RUSAGE_SELF</span></code></a> should be used to request information pertaining only to the process itself.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RUSAGE_CHILDREN"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RUSAGE_CHILDREN</span></span><a class="headerlink" href="#resource.RUSAGE_CHILDREN" title="Permalink to this definition">¶</a></dt> <dd><p>Pass to <a class="reference internal" href="#resource.getrusage" title="resource.getrusage"><code class="xref py py-func docutils literal notranslate"><span class="pre">getrusage()</span></code></a> to request resource information for child processes of the calling process.</p> </dd></dl> <dl class="py data"> <dt class="sig sig-object py" id="resource.RUSAGE_BOTH"> <span class="sig-prename descclassname"><span class="pre">resource.</span></span><span class="sig-name descname"><span class="pre">RUSAGE_BOTH</span></span><a class="headerlink" href="#resource.RUSAGE_BOTH" title="Permalink to this definition">¶</a></dt> <dd><p>Pass to <a class="reference internal" href="#resource.getrusage" title="resource.getrusage"><code class="xref py py-func docutils literal notranslate"><span class="pre">getrusage()</span></code></a> to request resources consumed by both the current process and child processes. May not be available on all systems.</p> </dd></dl> </section> </section> <div class="clearer"></div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table of Contents</a></h3> <ul> <li><a class="reference internal" href="#">36.13. <code class="xref py py-mod docutils literal notranslate"><span class="pre">resource</span></code> — Resource usage information</a><ul> <li><a class="reference internal" href="#resource-limits">36.13.1. Resource Limits</a></li> <li><a class="reference internal" href="#resource-usage">36.13.2. Resource Usage</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="posixfile.html" title="previous chapter"><span class="section-number">36.12. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">posixfile</span></code> — File-like objects with locking support</a></p> <h4>Next topic</h4> <p class="topless"><a href="nis.html" title="next chapter"><span class="section-number">36.14. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">nis</span></code> — Interface to Sun’s NIS (Yellow Pages)</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/library/resource.rst.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3 id="searchlabel">Quick search</h3> <div class="searchformwrapper"> <form class="search" action="../search.html" method="get"> <input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/> <input type="submit" value="Go" /> </form> </div> </div> <script>$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="nis.html" title="36.14. nis — Interface to Sun’s NIS (Yellow Pages)" >next</a> |</li> <li class="right" > <a href="posixfile.html" title="36.12. posixfile — File-like objects with locking support" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.18 documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >The Python Standard Library</a> »</li> <li class="nav-item nav-item-2"><a href="unix.html" ><span class="section-number">36. </span>Unix Specific Services</a> »</li> <li class="nav-item nav-item-this"><a href=""><span class="section-number">36.13. </span><code class="xref py py-mod docutils literal notranslate"><span class="pre">resource</span></code> — Resource usage information</a></li> </ul> </div> <div class="footer"> © <a href="../copyright.html">Copyright</a> 1990-2024, Python Software Foundation. <br /> The Python Software Foundation is a non-profit corporation. <a href="https://www.python.org/psf/donations/">Please donate.</a> <br /> Last updated on December 09, 2024. <a href="../bugs.html">Found a bug</a>? <br /> Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 4.3.2. </div> </body> </html>
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