Breaking News: Grepper is joining You.com. Read the official announcement!

how to know the number of CPu using python

Add Answer

Expensive Eland answered on January 5, 2021 Popularity 2/10 Helpfulness 1/10

answer how to know the number of CPu using python

related get cpu count in python

related Python get number of CPU in system

how to know the number of CPu using python

Comment

import os
import re
import subprocess


def available_cpu_count():
    """ Number of available virtual or physical CPUs on this system, i.e.
    user/real as output by time(1) when called with an optimally scaling
    userspace-only program"""

    # cpuset
    # cpuset may restrict the number of *available* processors
    try:
        m = re.search(r'(?m)^Cpus_allowed:\s*(.*)$',
                      open('/proc/self/status').read())
        if m:
            res = bin(int(m.group(1).replace(',', ''), 16)).count('1')
            if res > 0:
                return res
    except IOError:
        pass

    # Python 2.6+
    try:
        import multiprocessing
        return multiprocessing.cpu_count()
    except (ImportError, NotImplementedError):
        pass

    # https://github.com/giampaolo/psutil
    try:
        import psutil
        return psutil.cpu_count()   # psutil.NUM_CPUS on old versions
    except (ImportError, AttributeError):
        pass

    # POSIX
    try:
        res = int(os.sysconf('SC_NPROCESSORS_ONLN'))

        if res > 0:
            return res
    except (AttributeError, ValueError):
        pass

    # Windows
    try:
        res = int(os.environ['NUMBER_OF_PROCESSORS'])

        if res > 0:
            return res
    except (KeyError, ValueError):
        pass

    # jython
    try:
        from java.lang import Runtime
        runtime = Runtime.getRuntime()
        res = runtime.availableProcessors()
        if res > 0:
            return res
    except ImportError:
        pass

    # BSD
    try:
        sysctl = subprocess.Popen(['sysctl', '-n', 'hw.ncpu'],
                                  stdout=subprocess.PIPE)
        scStdout = sysctl.communicate()[0]
        res = int(scStdout)

        if res > 0:
            return res
    except (OSError, ValueError):
        pass

    # Linux
    try:
        res = open('/proc/cpuinfo').read().count('processor\t:')

        if res > 0:
            return res
    except IOError:
        pass

    # Solaris
    try:
        pseudoDevices = os.listdir('/devices/pseudo/')
        res = 0
        for pd in pseudoDevices:
            if re.match(r'^cpuid@[0-9]+$', pd):
                res += 1

        if res > 0:
            return res
    except OSError:
        pass

    # Other UNIXes (heuristic)
    try:
        try:
            dmesg = open('/var/run/dmesg.boot').read()
        except IOError:
            dmesgProcess = subprocess.Popen(['dmesg'], stdout=subprocess.PIPE)
            dmesg = dmesgProcess.communicate()[0]

        res = 0
        while '\ncpu' + str(res) + ':' in dmesg:
            res += 1

        if res > 0:
            return res
    except OSError:
        pass

    raise Exception('Can not determine number of CPUs on this system')

Popularity 2/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: cpu python using

Link to this answer
Share Copy Link

Contributed on Jan 05 2021

Expensive Eland

0 Answers Avg Quality 2/10

Closely Related Answers

get cpu count in python

Comment

1
import os
2
workers = os.cpu_count()
3
if 'sched_getaffinity' in dir(os):
4
    workers = len(os.sched_getaffinity(0))
5

Popularity 9/10 Helpfulness 9/10 Language python

Source: pyquestions.com

Tags: count coun

Link to this answer
Share Copy Link

Contributed on Apr 15 2022

Ashburry

0 Answers Avg Quality 2/10

Python get number of CPU in system

Comment

import os
os.cpu_count()

Popularity 6/10 Helpfulness 7/10 Language python

Source: Grepper

Tags: cpu get python system

Link to this answer
Share Copy Link

Contributed on Mar 16 2023

WetNoodle

0 Answers Avg Quality 2/10

how to know the number of CPu using python

Contents

More Related Answers

how to know the number of CPu using python

Closely Related Answers

get cpu count in python

Python get number of CPU in system

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.