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# This file is part of QuTiP: Quantum Toolbox in Python.
#
# Copyright (c) 2011 and later, Paul D. Nation and Robert J. Johansson.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. Neither the name of the QuTiP: Quantum Toolbox in Python nor the names
# of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
###############################################################################
__all__ = ['hardware_info']
import os
import sys
import multiprocessing
def _mac_hardware_info():
info = dict()
results = dict()
for l in [l.split(':') for l in os.popen('sysctl hw').readlines()[1:]]:
info[l[0].strip(' "').replace(' ', '_').lower().strip('hw.')] = \
l[1].strip('.\n ')
results.update({'cpus': int(info['physicalcpu'])})
results.update({'cpu_freq': int(float(os.popen('sysctl -n machdep.cpu.brand_string')
.readlines()[0].split('@')[1][:-4])*1000)})
results.update({'memsize': int(int(info['memsize']) / (1024 ** 2))})
# add OS information
results.update({'os': 'Mac OSX'})
return results
def _linux_hardware_info():
results = {}
# get cpu number
cpu_info = dict()
for l in [l.split(':') for l in os.popen('lscpu').readlines()]:
cpu_info[l[0]] = l[1].strip('.\n ').strip('kB')
sockets = int(cpu_info['Socket(s)'])
cores_per_socket = int(cpu_info['Core(s) per socket'])
results.update({'cpus': sockets * cores_per_socket})
# get cpu frequency directly (bypasses freq scaling)
try:
file = "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq"
cpu_freq = open(file).readlines()[0]
cpu_freq = float(cpu_freq.strip('\n'))
results.update({'cpu_freq': cpu_freq / (1000. ** 2)})
except:
cpu_freq = float(cpu_info['CPU MHz']) / 1000.
results.update({'cpu_freq': cpu_freq})
# get total amount of memory
mem_info = dict()
for l in [l.split(':') for l in open("/proc/meminfo").readlines()]:
mem_info[l[0]] = l[1].strip('.\n ').strip('kB')
results.update({'memsize': int(mem_info['MemTotal']) / 1024})
# add OS information
results.update({'os': 'Linux'})
return results
def _win_hardware_info():
try:
from comtypes.client import CoGetObject
winmgmts_root = CoGetObject("winmgmts:root\cimv2")
cpus = winmgmts_root.ExecQuery("Select * from Win32_Processor")
ncpus = 0
for cpu in cpus:
ncpus += int(cpu.Properties_['NumberOfCores'].Value)
except:
ncpus = int(multiprocessing.cpu_count())
return {'os': 'Windows', 'cpus': ncpus}
def hardware_info():
"""
Returns basic hardware information about the computer.
Gives actual number of CPU's in the machine, even when hyperthreading is
turned on.
Returns
-------
info : dict
Dictionary containing cpu and memory information.
"""
try:
if sys.platform == 'darwin':
out = _mac_hardware_info()
elif sys.platform == 'win32':
out = _win_hardware_info()
elif sys.platform in ['linux', 'linux2']:
out = _linux_hardware_info()
else:
out = {}
except:
return {}
else:
return out
if __name__ == '__main__':
print(hardware_info())