mirror of
https://github.com/nicolargo/glances.git
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98 lines
3.7 KiB
Python
98 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# This file is part of Glances.
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#
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# Copyright (C) 2017 Nicolargo <nicolas@nicolargo.com>
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#
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# Glances is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Glances is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""CPU percent stats shared between CPU and Quicklook plugins."""
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from glances.timer import Timer
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import psutil
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class CpuPercent(object):
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"""Get and store the CPU percent."""
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def __init__(self, cached_time=1):
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self.cpu_percent = 0
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self.percpu_percent = []
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# cached_time is the minimum time interval between stats updates
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# since last update is passed (will retrieve old cached info instead)
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self.timer_cpu = Timer(0)
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self.timer_percpu = Timer(0)
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self.cached_time = cached_time
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def get_key(self):
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"""Return the key of the per CPU list."""
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return 'cpu_number'
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def get(self, percpu=False):
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"""Update and/or return the CPU using the psutil library.
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If percpu, return the percpu stats"""
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if percpu:
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return self.__get_percpu()
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else:
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return self.__get_cpu()
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def __get_cpu(self):
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"""Update and/or return the CPU using the psutil library."""
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# Never update more than 1 time per cached_time
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if self.timer_cpu.finished():
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self.cpu_percent = psutil.cpu_percent(interval=0.0)
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# Reset timer for cache
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self.timer_cpu = Timer(self.cached_time)
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return self.cpu_percent
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def __get_percpu(self):
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"""Update and/or return the per CPU list using the psutil library."""
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# Never update more than 1 time per cached_time
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if self.timer_percpu.finished():
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self.percpu_percent = []
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for cpu_number, cputimes in enumerate(psutil.cpu_times_percent(interval=0.0, percpu=True)):
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cpu = {'key': self.get_key(),
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'cpu_number': cpu_number,
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'total': round(100 - cputimes.idle, 1),
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'user': cputimes.user,
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'system': cputimes.system,
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'idle': cputimes.idle}
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# The following stats are for API purposes only
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if hasattr(cputimes, 'nice'):
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cpu['nice'] = cputimes.nice
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if hasattr(cputimes, 'iowait'):
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cpu['iowait'] = cputimes.iowait
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if hasattr(cputimes, 'irq'):
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cpu['irq'] = cputimes.irq
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if hasattr(cputimes, 'softirq'):
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cpu['softirq'] = cputimes.softirq
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if hasattr(cputimes, 'steal'):
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cpu['steal'] = cputimes.steal
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if hasattr(cputimes, 'guest'):
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cpu['guest'] = cputimes.guest
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if hasattr(cputimes, 'guest_nice'):
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cpu['guest_nice'] = cputimes.guest_nice
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# Append new CPU to the list
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self.percpu_percent.append(cpu)
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# Reset timer for cache
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self.timer_percpu = Timer(self.cached_time)
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return self.percpu_percent
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# CpuPercent instance shared between plugins
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cpu_percent = CpuPercent()
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