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basabuuka_prototyp/venv/lib/python3.5/site-packages/glances/processes.py

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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2018 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import operator
import os
from glances.compat import iteritems, itervalues, listitems, iterkeys
from glances.globals import BSD, LINUX, MACOS, SUNOS, WINDOWS
from glances.timer import Timer, getTimeSinceLastUpdate
from glances.filter import GlancesFilter
from glances.logger import logger
import psutil
class GlancesProcesses(object):
"""Get processed stats using the psutil library."""
def __init__(self, cache_timeout=60):
"""Init the class to collect stats about processes."""
# Add internals caches because psutil do not cache all the stats
# See: https://code.google.com/p/psutil/issues/detail?id=462
self.username_cache = {}
self.cmdline_cache = {}
# The internals caches will be cleaned each 'cache_timeout' seconds
self.cache_timeout = cache_timeout
self.cache_timer = Timer(self.cache_timeout)
# Init the io dict
# key = pid
# value = [ read_bytes_old, write_bytes_old ]
self.io_old = {}
# Init stats
self.auto_sort = True
self._sort_key = 'cpu_percent'
self.processlist = []
self.reset_processcount()
# Tag to enable/disable the processes stats (to reduce the Glances CPU consumption)
# Default is to enable the processes stats
self.disable_tag = False
# Extended stats for top process is enable by default
self.disable_extended_tag = False
# Maximum number of processes showed in the UI (None if no limit)
self._max_processes = None
# Process filter is a regular expression
self._filter = GlancesFilter()
# Whether or not to hide kernel threads
self.no_kernel_threads = False
# Store maximums values in a dict
# Used in the UI to highlight the maximum value
self._max_values_list = ('cpu_percent', 'memory_percent')
# { 'cpu_percent': 0.0, 'memory_percent': 0.0 }
self._max_values = {}
self.reset_max_values()
def reset_processcount(self):
"""Reset the global process count"""
self.processcount = {'total': 0,
'running': 0,
'sleeping': 0,
'thread': 0,
'pid_max': None}
def update_processcount(self, plist):
"""Update the global process count from the current processes list"""
# Update the maximum process ID (pid) number
self.processcount['pid_max'] = self.pid_max
# For each key in the processcount dict
# count the number of processes with the same status
for k in iterkeys(self.processcount):
self.processcount[k] = len(list(filter(lambda v: v['status'] is k,
plist)))
# Compute thread
self.processcount['thread'] = sum(i['num_threads'] for i in plist
if i['num_threads'] is not None)
# Compute total
self.processcount['total'] = len(plist)
def enable(self):
"""Enable process stats."""
self.disable_tag = False
self.update()
def disable(self):
"""Disable process stats."""
self.disable_tag = True
def enable_extended(self):
"""Enable extended process stats."""
self.disable_extended_tag = False
self.update()
def disable_extended(self):
"""Disable extended process stats."""
self.disable_extended_tag = True
@property
def pid_max(self):
"""
Get the maximum PID value.
On Linux, the value is read from the `/proc/sys/kernel/pid_max` file.
From `man 5 proc`:
The default value for this file, 32768, results in the same range of
PIDs as on earlier kernels. On 32-bit platfroms, 32768 is the maximum
value for pid_max. On 64-bit systems, pid_max can be set to any value
up to 2^22 (PID_MAX_LIMIT, approximately 4 million).
If the file is unreadable or not available for whatever reason,
returns None.
Some other OSes:
- On FreeBSD and macOS the maximum is 99999.
- On OpenBSD >= 6.0 the maximum is 99999 (was 32766).
- On NetBSD the maximum is 30000.
:returns: int or None
"""
if LINUX:
# XXX: waiting for https://github.com/giampaolo/psutil/issues/720
try:
with open('/proc/sys/kernel/pid_max', 'rb') as f:
return int(f.read())
except (OSError, IOError):
return None
else:
return None
@property
def max_processes(self):
"""Get the maximum number of processes showed in the UI."""
return self._max_processes
@max_processes.setter
def max_processes(self, value):
"""Set the maximum number of processes showed in the UI."""
self._max_processes = value
@property
def process_filter_input(self):
"""Get the process filter (given by the user)."""
return self._filter.filter_input
@property
def process_filter(self):
"""Get the process filter (current apply filter)."""
return self._filter.filter
@process_filter.setter
def process_filter(self, value):
"""Set the process filter."""
self._filter.filter = value
@property
def process_filter_key(self):
"""Get the process filter key."""
return self._filter.filter_key
@property
def process_filter_re(self):
"""Get the process regular expression compiled."""
return self._filter.filter_re
def disable_kernel_threads(self):
"""Ignore kernel threads in process list."""
self.no_kernel_threads = True
@property
def sort_reverse(self):
"""Return True to sort processes in reverse 'key' order, False instead."""
if self.sort_key == 'name' or self.sort_key == 'username':
return False
return True
def max_values(self):
"""Return the max values dict."""
return self._max_values
def get_max_values(self, key):
"""Get the maximum values of the given stat (key)."""
return self._max_values[key]
def set_max_values(self, key, value):
"""Set the maximum value for a specific stat (key)."""
self._max_values[key] = value
def reset_max_values(self):
"""Reset the maximum values dict."""
self._max_values = {}
for k in self._max_values_list:
self._max_values[k] = 0.0
def update(self):
"""Update the processes stats."""
# Reset the stats
self.processlist = []
self.reset_processcount()
# Do not process if disable tag is set
if self.disable_tag:
return
# Time since last update (for disk_io rate computation)
time_since_update = getTimeSinceLastUpdate('process_disk')
# Grab standard stats
#####################
standard_attrs = ['cmdline', 'cpu_percent', 'cpu_times', 'memory_info',
'memory_percent', 'name', 'nice', 'pid', 'ppid',
'status', 'username', 'status', 'num_threads']
# io_counters availability: Linux, BSD, Windows, AIX
if not MACOS and not SUNOS:
standard_attrs += ['io_counters']
# gids availability: Unix
if not WINDOWS:
standard_attrs += ['gids']
# and build the processes stats list (psutil>=5.3.0)
self.processlist = [p.info for p in psutil.process_iter(attrs=standard_attrs,
ad_value=None)
# OS-related processes filter
if not (BSD and p.info['name'] == 'idle') and
not (WINDOWS and p.info['name'] == 'System Idle Process') and
not (MACOS and p.info['name'] == 'kernel_task') and
# Kernel threads filter
not (self.no_kernel_threads and LINUX and p.info['gids'].real == 0) and
# User filter
not (self._filter.is_filtered(p.info))]
# Sort the processes list by the current sort_key
self.processlist = sort_stats(self.processlist,
sortedby=self.sort_key,
reverse=True)
# Update the processcount
self.update_processcount(self.processlist)
# Loop over processes and add metadata
first = True
for proc in self.processlist:
# Get extended stats, only for top processes (see issue #403).
if first and not self.disable_extended_tag:
# - cpu_affinity (Linux, Windows, FreeBSD)
# - ionice (Linux and Windows > Vista)
# - num_ctx_switches (not available on Illumos/Solaris)
# - num_fds (Unix-like)
# - num_handles (Windows)
# - memory_maps (only swap, Linux)
# https://www.cyberciti.biz/faq/linux-which-process-is-using-swap/
# - connections (TCP and UDP)
extended = {}
try:
top_process = psutil.Process(proc['pid'])
extended_stats = ['cpu_affinity', 'ionice',
'num_ctx_switches', 'num_fds']
if WINDOWS:
extended_stats += ['num_handles']
# Get the extended stats
extended = top_process.as_dict(attrs=extended_stats,
ad_value=None)
if LINUX:
try:
extended['memory_swap'] = sum([v.swap for v in top_process.memory_maps()])
except psutil.NoSuchProcess:
pass
except (psutil.AccessDenied, NotImplementedError):
# NotImplementedError: /proc/${PID}/smaps file doesn't exist
# on kernel < 2.6.14 or CONFIG_MMU kernel configuration option
# is not enabled (see psutil #533/glances #413).
extended['memory_swap'] = None
try:
extended['tcp'] = len(top_process.connections(kind="tcp"))
extended['udp'] = len(top_process.connections(kind="udp"))
except (psutil.AccessDenied, psutil.NoSuchProcess):
# Manage issue1283 (psutil.AccessDenied)
extended['tcp'] = None
extended['udp'] = None
except (psutil.NoSuchProcess, ValueError, AttributeError) as e:
logger.error('Can not grab extended stats ({})'.format(e))
extended['extended_stats'] = False
else:
logger.debug('Grab extended stats for process {}'.format(proc['pid']))
extended['extended_stats'] = True
proc.update(extended)
first = False
# /End of extended stats
# Time since last update (for disk_io rate computation)
proc['time_since_update'] = time_since_update
# Process status (only keep the first char)
proc['status'] = str(proc['status'])[:1].upper()
# Process IO
# procstat['io_counters'] is a list:
# [read_bytes, write_bytes, read_bytes_old, write_bytes_old, io_tag]
# If io_tag = 0 > Access denied or first time (display "?")
# If io_tag = 1 > No access denied (display the IO rate)
if 'io_counters' in proc and proc['io_counters'] is not None:
io_new = [proc['io_counters'].read_bytes,
proc['io_counters'].write_bytes]
# For IO rate computation
# Append saved IO r/w bytes
try:
proc['io_counters'] = io_new + self.io_old[proc['pid']]
io_tag = 1
except KeyError:
proc['io_counters'] = io_new + [0, 0]
io_tag = 0
# then save the IO r/w bytes
self.io_old[proc['pid']] = io_new
else:
proc['io_counters'] = [0, 0] + [0, 0]
io_tag = 0
# Append the IO tag (for display)
proc['io_counters'] += [io_tag]
# Compute the maximum value for keys in self._max_values_list: CPU, MEM
# Usefull to highlight the processes with maximum values
for k in self._max_values_list:
values_list = [i[k] for i in self.processlist if i[k] is not None]
if values_list != []:
self.set_max_values(k, max(values_list))
def getcount(self):
"""Get the number of processes."""
return self.processcount
def getlist(self, sortedby=None):
"""Get the processlist."""
return self.processlist
@property
def sort_key(self):
"""Get the current sort key."""
return self._sort_key
@sort_key.setter
def sort_key(self, key):
"""Set the current sort key."""
self._sort_key = key
def weighted(value):
"""Manage None value in dict value."""
return -float('inf') if value is None else value
def sort_stats(stats, sortedby=None, reverse=True):
"""Return the stats (dict) sorted by (sortedby).
Reverse the sort if reverse is True.
"""
sortedby_secondary = 'cpu_percent'
if sortedby is None:
# No need to sort...
return stats
elif sortedby is 'cpu_percent':
sortedby_secondary = 'memory_percent'
if sortedby == 'io_counters':
# Specific case for io_counters
# Sum of io_r + io_w
try:
# Sort process by IO rate (sum IO read + IO write)
stats.sort(key=lambda process: process[sortedby][0] -
process[sortedby][2] + process[sortedby][1] -
process[sortedby][3],
reverse=reverse)
except Exception:
stats.sort(key=lambda x: (weighted(x['cpu_percent']),
weighted(x['memory_percent'])),
reverse=reverse)
else:
# Others sorts
try:
stats.sort(key=lambda x: (weighted(x[sortedby]),
weighted(x[sortedby_secondary])),
reverse=reverse)
except (KeyError, TypeError):
stats.sort(key=operator.itemgetter('name'),
reverse=False)
return stats
glances_processes = GlancesProcesses()