Python system monitoring module psutil function and classical usage analysis

This paper introduces the psutil system monitoring module Python function and classical usage. To share for your reference, the details are as follows:

1. Overview of psutil module

psutil is a cross-platform library (http: / / code. google. com p/psutil /), can easily realize the acquisition system running processes and system utilization, including CPU, memory, disk, network, etc.) information. It is mainly used for system monitoring, analyzing and limiting the management of system resources and processes. It implements functions provided by equivalent command line tools, such as ps, top, lsof, netstat, ifconfig, who, df, kill, free, nice, ionice, iostat, iotop, uptime, pidof, tty, taskset, pmap, etc. It currently supports 32-bit and 64-bit Linux, Windows, OS X, FreeBSD and Sun Solaris operating systems,

2. psutil installation

wget https://pypi.python.org/packages/source/p/psutil/psutil-2.0.0.tar.gz
tar -xzvf psutil-2.0.0.tar.gz
cd psutil-2.0.0
python setup.py install

Supplement: On Windows platform, you only need to enter the following command on the command line interface to quickly install:

pip install psutil

3. psutil use

Get system performance information (CPU, memory, disk, network, etc.)

1) CPU related

View cpu information

import Psutil

View all information on cpu

>>> psutil.cpu_times()
scputimes(user=11677.09, nice=57.93, system=148675.58, idle=2167147.79, iowait=260828.48, irq=7876.28, softirq=0.0, steal=3694.59, guest=0.0, guest_nice=0.0)

Displays all logical information for cpu

>>> psutil.cpu_times(percpu=True)
[scputimes(user=11684.17, nice=57.93, system=148683.01, idle=2168982.08, iowait=260833.18, irq=7882.35, softirq=0.0, steal=3697.3, guest=0.0, guest_nice=0.0)]

View the user's cpu time ratio

>>> psutil.cpu_times().user
11684.4

View the logical number of cpu

>>> psutil.cpu_count()
1

View the number of cpu physics

>>> psutil.cpu_count(logical=False)
1

View the system memory

>>> import psutil
>>> mem = psutil.virtual_memory()
>>> mem
# All information about system memory 
svmem(total=1040662528, available=175054848, percent=83.2, used=965718016, free=74944512, active=566755328, inactive=59457536, buffers=9342976, cached=90767360)

Total system memory

>>> mem.total
1040662528

The system is already using memory

pip install psutil

0

System free memory

pip install psutil

1

Gets swap memory information

pip install psutil

2

Read disk parameters

Disk utilization psutil.disk_usage Method acquisition,

Disk IO information includes read_count(read IO number), write_count(write IO number)

read_bytes(IO writing), read_time(disk read time), write_time(disk write time), these IO messages are used

psutil.disk_io_counters()

Get complete information about the disk

pip install psutil

4

Gets the parameters of the partition table

pip install psutil

5

Gets the total number of hard disk IO

pip install psutil

6

Gets the number of IO for a single partition

pip install psutil

7

Read the network information

The network information is similar to the disk IO information and involves several key points, including byes_sent(number of bytes sent),byte_recv=xxx(number of bytes accepted),
pack-ets_sent =xxx(number of bytes sent), ES152en-ES153en_ES154en =xxx(number of packets received), which are used for network information

Obtain total IO information

psutil.net_io_counters()

Output information for each interface of the network

pip install psutil

9

Obtain the login information of current system users

psutil.users()

Get the boot time

psutil.boot_time() # In order to linux Time format return 
datetime.datetime.fromtimestamp(psutil.boot_time ()).strftime("%Y-%m-%d %H: %M: %S") # Convert to natural time format 

System process management

Get the process information of the current system, get the running state of the current program, including the start time of the process, view the Settings of CPU affinity, memory utilization,IO information, socket connection, number of threads, etc

Get process information

View all system processes

psutil.pids()

View a single process

import Psutil

3

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I hope this article is helpful for Python programming.