palemoon-dev/platform/python/psutil

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===========
Quick links
===========

- `Home page `_
- `Documentation `_
- `Installation `_
- `Download `_
- `Forum `_
- `Blog `_
- `Development guide `_
- `What's new `_

=======
Summary
=======

psutil (python system and process utilities) is a cross-platform library for
retrieving information on **running processes** and **system utilization**
(CPU, memory, disks, network) in Python. It is useful mainly for **system
monitoring**, **profiling and limiting process resources** and **management of
running processes**. It implements many functionalities offered by command line
tools such as: ps, top, lsof, netstat, ifconfig, who, df, kill, free, nice,
ionice, iostat, iotop, uptime, pidof, tty, taskset, pmap. It currently supports
**Linux, Windows, OSX, FreeBSD** and **Sun Solaris**, both **32-bit** and
**64-bit** architectures, with Python versions from **2.6 to 3.5** (users of
Python 2.4 and 2.5 may use `2.1.3 `__ version).
`PyPy `__ is also known to work.

====================
Example applications
====================

.. image:: http://psutil.googlecode.com/svn/wiki/images/top-thumb.png
:target: http://psutil.googlecode.com/svn/wiki/images/top.png
:alt: top

.. image:: http://psutil.googlecode.com/svn/wiki/images/nettop-thumb.png
:target: http://psutil.googlecode.com/svn/wiki/images/nettop.png
:alt: nettop

.. image:: http://psutil.googlecode.com/svn/wiki/images/iotop-thumb.png
:target: http://psutil.googlecode.com/svn/wiki/images/iotop.png
:alt: iotop

See also:

* https://github.com/nicolargo/glances
* https://github.com/google/grr
* https://github.com/Jahaja/psdash

==============
Example usages
==============

CPU
===

.. code-block:: python

>>> import psutil
>>> psutil.cpu_times()
scputimes(user=3961.46, nice=169.729, system=2150.659, idle=16900.540, iowait=629.59, irq=0.0, softirq=19.42, steal=0.0, guest=0, nice=0.0)
>>>
>>> for x in range(3):
... psutil.cpu_percent(interval=1)
...
4.0
5.9
3.8
>>>
>>> for x in range(3):
... psutil.cpu_percent(interval=1, percpu=True)
...
[4.0, 6.9, 3.7, 9.2]
[7.0, 8.5, 2.4, 2.1]
[1.2, 9.0, 9.9, 7.2]
>>>
>>>
>>> for x in range(3):
... psutil.cpu_times_percent(interval=1, percpu=False)
...
scputimes(user=1.5, nice=0.0, system=0.5, idle=96.5, iowait=1.5, irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)
scputimes(user=1.0, nice=0.0, system=0.0, idle=99.0, iowait=0.0, irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)
scputimes(user=2.0, nice=0.0, system=0.0, idle=98.0, iowait=0.0, irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)
>>>
>>> psutil.cpu_count()
4
>>> psutil.cpu_count(logical=False)
2
>>>

Memory
======

.. code-block:: python

>>> psutil.virtual_memory()
svmem(total=8374149120, available=2081050624, percent=75.1, used=8074080256, free=300068864, active=3294920704, inactive=1361616896, buffers=529895424, cached=1251086336)
>>> psutil.swap_memory()
sswap(total=2097147904, used=296128512, free=1801019392, percent=14.1, sin=304193536, sout=677842944)
>>>

Disks
=====

.. code-block:: python

>>> psutil.disk_partitions()
[sdiskpart(device='/dev/sda1', mountpoint='/', fstype='ext4', opts='rw,nosuid'),
sdiskpart(device='/dev/sda2', mountpoint='/home', fstype='ext, opts='rw')]
>>>
>>> psutil.disk_usage('/')
sdiskusage(total=21378641920, used=4809781248, free=15482871808, percent=22.5)
>>>
>>> psutil.disk_io_counters(perdisk=False)
sdiskio(read_count=719566, write_count=1082197, read_bytes=18626220032, write_bytes=24081764352, read_time=5023392, write_time=63199568)
>>>

Network
=======

.. code-block:: python

>>> psutil.net_io_counters(pernic=True)
{'eth0': netio(bytes_sent=485291293, bytes_recv=6004858642, packets_sent=3251564, packets_recv=4787798, errin=0, errout=0, dropin=0, dropout=0),
'lo': netio(bytes_sent=2838627, bytes_recv=2838627, packets_sent=30567, packets_recv=30567, errin=0, errout=0, dropin=0, dropout=0)}
>>>
>>> psutil.net_connections()
[pconn(fd=115, family=, type=, laddr=('10.0.0.1', 48776), raddr=('93.186.135.91', 80), status='ESTABLISHED', pid=1254),
pconn(fd=117, family=, type=, laddr=('10.0.0.1', 43761), raddr=('72.14.234.100', 80), status='CLOSING', pid=2987),
pconn(fd=-1, family=, type=, laddr=('10.0.0.1', 60759), raddr=('72.14.234.104', 80), status='ESTABLISHED', pid=None),
pconn(fd=-1, family=, type=, laddr=('10.0.0.1', 51314), raddr=('72.14.234.83', 443), status='SYN_SENT', pid=None)
...]
>>>
>>> psutil.net_if_addrs()
{'lo': [snic(family=, address='127.0.0.1', netmask='255.0.0.0', broadcast='127.0.0.1'),
snic(family=, address='::1', netmask='ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff', broadcast=None),
snic(family=, address='00:00:00:00:00:00', netmask=None, broadcast='00:00:00:00:00:00')],
'wlan0': [snic(family=, address='192.168.1.3', netmask='255.255.255.0', broadcast='192.168.1.255'),
snic(family=, address='fe80::c685:8ff:fe45:641%wlan0', netmask='ffff:ffff:ffff:ffff::', broadcast=None),
snic(family=, address='c4:85:08:45:06:41', netmask=None, broadcast='ff:ff:ff:ff:ff:ff')]}
>>>
>>> psutil.net_if_stats()
{'eth0': snicstats(isup=True, duplex=, speed=100, mtu=1500),
'lo': snicstats(isup=True, duplex=, speed=0, mtu=65536)}

Other system info
=================

.. code-block:: python

>>> psutil.users()
[user(name='giampaolo', terminal='pts/2', host='localhost', started=1340737536.0),
user(name='giampaolo', terminal='pts/3', host='localhost', started=1340737792.0)]
>>>
>>> psutil.boot_time()
1365519115.0
>>>

Process management
==================

.. code-block:: python

>>> import psutil
>>> psutil.pids()
[1, 2, 3, 4, 5, 6, 7, 46, 48, 50, 51, 178, 182, 222, 223, 224,
268, 1215, 1216, 1220, 1221, 1243, 1244, 1301, 1601, 2237, 2355,
2637, 2774, 3932, 4176, 4177, 4185, 4187, 4189, 4225, 4243, 4245,
4263, 4282, 4306, 4311, 4312, 4313, 4314, 4337, 4339, 4357, 4358,
4363, 4383, 4395, 4408, 4433, 4443, 4445, 4446, 5167, 5234, 5235,
5252, 5318, 5424, 5644, 6987, 7054, 7055, 7071]
>>>
>>> p = psutil.Process(7055)
>>> p.name()
'python'
>>> p.exe()
'/usr/bin/python'
>>> p.cwd()
'/home/giampaolo'
>>> p.cmdline()
['/usr/bin/python', 'main.py']
>>>
>>> p.status()
'running'
>>> p.username()
'giampaolo'
>>> p.create_time()
1267551141.5019531
>>> p.terminal()
'/dev/pts/0'
>>>
>>> p.uids()
puids(real=1000, effective=1000, saved=1000)
>>> p.gids()
pgids(real=1000, effective=1000, saved=1000)
>>>
>>> p.cpu_times()
pcputimes(user=1.02, system=0.31)
>>> p.cpu_percent(interval=1.0)
12.1
>>> p.cpu_affinity()
[0, 1, 2, 3]
>>> p.cpu_affinity([0]) # set
>>>
>>> p.memory_percent()
0.63423
>>>
>>> p.memory_info()
pmem(rss=7471104, vms=68513792)
>>> p.memory_info_ex()
extmem(rss=9662464, vms=49192960, shared=3612672, text=2564096, lib=0, data=5754880, dirty=0)
>>> p.memory_maps()
[pmmap_grouped(path='/lib/x86_64-linux-gnu/libutil-2.15.so', rss=16384, anonymous=8192, swap=0),
pmmap_grouped(path='/lib/x86_64-linux-gnu/libc-2.15.so', rss=6384, anonymous=15, swap=0),
pmmap_grouped(path='/lib/x86_64-linux-gnu/libcrypto.so.1.0.0', rss=34124, anonymous=1245, swap=0),
pmmap_grouped(path='[heap]', rss=54653, anonymous=8192, swap=0),
pmmap_grouped(path='[stack]', rss=1542, anonymous=166, swap=0),
...]
>>>
>>> p.io_counters()
pio(read_count=478001, write_count=59371, read_bytes=700416, write_bytes=69632)
>>>
>>> p.open_files()
[popenfile(path='/home/giampaolo/svn/psutil/somefile', fd=3)]
>>>
>>> p.connections()
[pconn(fd=115, family=, type=, laddr=('10.0.0.1', 48776), raddr=('93.186.135.91', 80), status='ESTABLISHED'),
pconn(fd=117, family=, type=, laddr=('10.0.0.1', 43761), raddr=('72.14.234.100', 80), status='CLOSING'),
pconn(fd=119, family=, type=, laddr=('10.0.0.1', 60759), raddr=('72.14.234.104', 80), status='ESTABLISHED'),
pconn(fd=123, family=, type=, laddr=('10.0.0.1', 51314), raddr=('72.14.234.83', 443), status='SYN_SENT')]
>>>
>>> p.num_threads()
4
>>> p.num_fds()
8
>>> p.threads()
[pthread(id=5234, user_time=22.5, system_time=9.2891),
pthread(id=5235, user_time=0.0, system_time=0.0),
pthread(id=5236, user_time=0.0, system_time=0.0),
pthread(id=5237, user_time=0.0707, system_time=1.1)]
>>>
>>> p.num_ctx_switches()
pctxsw(voluntary=78, involuntary=19)
>>>
>>> p.nice()
0
>>> p.nice(10) # set
>>>
>>> p.ionice(psutil.IOPRIO_CLASS_IDLE) # IO priority (Win and Linux only)
>>> p.ionice()
pionice(ioclass=, value=0)
>>>
>>> p.rlimit(psutil.RLIMIT_NOFILE, (5, 5)) # set resource limits (Linux only)
>>> p.rlimit(psutil.RLIMIT_NOFILE)
(5, 5)
>>>
>>> p.suspend()
>>> p.resume()
>>>
>>> p.terminate()
>>> p.wait(timeout=3)
0
>>>
>>> psutil.test()
USER PID %CPU %MEM VSZ RSS TTY START TIME COMMAND
root 1 0.0 0.0 24584 2240 Jun17 00:00 init
root 2 0.0 0.0 0 0 Jun17 00:00 kthreadd
root 3 0.0 0.0 0 0 Jun17 00:05 ksoftirqd/0
...
giampaolo 31475 0.0 0.0 20760 3024 /dev/pts/0 Jun19 00:00 python2.4
giampaolo 31721 0.0 2.2 773060 181896 00:04 10:30 chrome
root 31763 0.0 0.0 0 0 00:05 00:00 kworker/0:1
>>>

Further process APIs
====================

.. code-block:: python

>>> for p in psutil.process_iter():
... print(p)
...
psutil.Process(pid=1, name='init')
psutil.Process(pid=2, name='kthreadd')
psutil.Process(pid=3, name='ksoftirqd/0')
...
>>>
>>> def on_terminate(proc):
... print("process {} terminated".format(proc))
...
>>> # waits for multiple processes to terminate
>>> gone, alive = psutil.wait_procs(procs_list, 3, callback=on_terminate)
>>>

======
Donate
======

A lot of time and effort went into making psutil as it is right now.
If you feel psutil is useful to you or your business and want to support its future development please consider donating me (`Giampaolo Rodola' `_) some money.
I only ask for a small donation, but of course I appreciate any amount.

.. image:: http://www.paypal.com/en_US/i/btn/x-click-but04.gif
:target: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A9ZS7PKKRM3S8
:alt: Donate via PayPal

Don't want to donate money? Then maybe you could `write me a recommendation on Linkedin `_.

============
Mailing list
============

http://groups.google.com/group/psutil/

========
Timeline
========

- 2015-07-15: `psutil-3.1.1.tar.gz `_
- 2015-07-15: `psutil-3.1.0.tar.gz `_
- 2015-06-18: `psutil-3.0.1.tar.gz `_
- 2015-06-13: `psutil-3.0.0.tar.gz `_
- 2015-02-02: `psutil-2.2.1.tar.gz `_
- 2015-01-06: `psutil-2.2.0.tar.gz `_
- 2014-09-26: `psutil-2.1.3.tar.gz `_
- 2014-09-21: `psutil-2.1.2.tar.gz `_
- 2014-04-30: `psutil-2.1.1.tar.gz `_
- 2014-04-08: `psutil-2.1.0.tar.gz `_
- 2014-03-10: `psutil-2.0.0.tar.gz `_
- 2013-11-25: `psutil-1.2.1.tar.gz `_
- 2013-11-20: `psutil-1.2.0.tar.gz `_
- 2013-11-07: `psutil-1.1.3.tar.gz `_
- 2013-10-22: `psutil-1.1.2.tar.gz `_
- 2013-10-08: `psutil-1.1.1.tar.gz `_
- 2013-09-28: `psutil-1.1.0.tar.gz `_
- 2013-07-12: `psutil-1.0.1.tar.gz `_
- 2013-07-10: `psutil-1.0.0.tar.gz `_
- 2013-05-03: `psutil-0.7.1.tar.gz `_
- 2013-04-12: `psutil-0.7.0.tar.gz `_
- 2012-08-16: `psutil-0.6.1.tar.gz `_
- 2012-08-13: `psutil-0.6.0.tar.gz `_
- 2012-06-29: `psutil-0.5.1.tar.gz `_
- 2012-06-27: `psutil-0.5.0.tar.gz `_
- 2011-12-14: `psutil-0.4.1.tar.gz `_
- 2011-10-29: `psutil-0.4.0.tar.gz `_
- 2011-07-08: `psutil-0.3.0.tar.gz `_
- 2011-03-20: `psutil-0.2.1.tar.gz `_
- 2010-11-13: `psutil-0.2.0.tar.gz `_
- 2010-03-02: `psutil-0.1.3.tar.gz `_
- 2009-05-06: `psutil-0.1.2.tar.gz `_
- 2009-03-06: `psutil-0.1.1.tar.gz `_
- 2009-01-27: `psutil-0.1.0.tar.gz `_