/usr/lib/python3/dist-packages/glances/plugins/glances_irq.py is in glances 2.11.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2017 Angelo Poerio <angelo.poerio@gmail.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/>.
"""IRQ plugin."""
import os
import operator
from glances.globals import LINUX
from glances.timer import getTimeSinceLastUpdate
from glances.plugins.glances_plugin import GlancesPlugin
class Plugin(GlancesPlugin):
"""Glances IRQ plugin.
stats is a list
"""
def __init__(self, args=None):
"""Init the plugin."""
super(Plugin, self).__init__(args=args)
# We want to display the stat in the curse interface
self.display_curse = True
# Init the stats
self.irq = GlancesIRQ()
self.reset()
def get_key(self):
"""Return the key of the list."""
return self.irq.get_key()
def reset(self):
"""Reset/init the stats."""
self.stats = []
@GlancesPlugin._check_decorator
@GlancesPlugin._log_result_decorator
def update(self):
"""Update the IRQ stats"""
# Reset the list
self.reset()
# IRQ plugin only available on GNU/Linux
if not LINUX:
return self.stats
if self.input_method == 'local':
# Grab the stats
self.stats = self.irq.get()
elif self.input_method == 'snmp':
# not available
pass
# Get the TOP 5
self.stats = sorted(self.stats, key=operator.itemgetter(
'irq_rate'), reverse=True)[:5] # top 5 IRQ by rate/s
return self.stats
def update_views(self):
"""Update stats views."""
# Call the father's method
super(Plugin, self).update_views()
def msg_curse(self, args=None, max_width=None):
"""Return the dict to display in the curse interface."""
# Init the return message
ret = []
# Only available on GNU/Linux
# Only process if stats exist and display plugin enable...
if not LINUX or not self.stats or not self.args.enable_irq:
return ret
if max_width is not None and max_width >= 23:
irq_max_width = max_width - 14
else:
irq_max_width = 9
# Build the string message
# Header
msg = '{:{width}}'.format('IRQ', width=irq_max_width)
ret.append(self.curse_add_line(msg, "TITLE"))
msg = '{:>14}'.format('Rate/s')
ret.append(self.curse_add_line(msg))
for i in self.stats:
ret.append(self.curse_new_line())
msg = '{:<15}'.format(i['irq_line'][:15])
ret.append(self.curse_add_line(msg))
msg = '{:>8}'.format(str(i['irq_rate']))
ret.append(self.curse_add_line(msg))
return ret
class GlancesIRQ(object):
"""
This class manages the IRQ file
"""
IRQ_FILE = '/proc/interrupts'
def __init__(self):
"""
Init the class
The stat are stored in a internal list of dict
"""
self.lasts = {}
self.reset()
def reset(self):
"""Reset the stats"""
self.stats = []
self.cpu_number = 0
def get(self):
"""Return the current IRQ stats"""
return self.__update()
def get_key(self):
"""Return the key of the dict."""
return 'irq_line'
def __header(self, line):
"""The header contain the number of CPU
CPU0 CPU1 CPU2 CPU3
0: 21 0 0 0 IO-APIC 2-edge timer
"""
self.cpu_number = len(line.split())
return self.cpu_number
def __humanname(self, line):
"""Get a line and
Return the IRQ name, alias or number (choose the best for human)
IRQ line samples:
1: 44487 341 44 72 IO-APIC 1-edge i8042
LOC: 33549868 22394684 32474570 21855077 Local timer interrupts
"""
splitted_line = line.split()
irq_line = splitted_line[0].replace(':', '')
if irq_line.isdigit():
# If the first column is a digit, use the alias (last column)
irq_line += '_{}'.format(splitted_line[-1])
return irq_line
def __sum(self, line):
"""Get a line and
Return the IRQ sum number
IRQ line samples:
1: 44487 341 44 72 IO-APIC 1-edge i8042
LOC: 33549868 22394684 32474570 21855077 Local timer interrupts
FIQ: usb_fiq
"""
splitted_line = line.split()
try:
ret = sum(map(int, splitted_line[1:(self.cpu_number + 1)]))
except ValueError:
# Correct issue #1007 on some conf (Raspberry Pi with Raspbian)
ret = 0
return ret
def __update(self):
"""
Load the IRQ file and update the internal dict
"""
self.reset()
if not os.path.exists(self.IRQ_FILE):
# Correct issue #947: IRQ file do not exist on OpenVZ container
return self.stats
try:
with open(self.IRQ_FILE) as irq_proc:
time_since_update = getTimeSinceLastUpdate('irq')
# Read the header
self.__header(irq_proc.readline())
# Read the rest of the lines (one line per IRQ)
for line in irq_proc.readlines():
irq_line = self.__humanname(line)
current_irqs = self.__sum(line)
irq_rate = int(
current_irqs - self.lasts.get(irq_line)
if self.lasts.get(irq_line)
else 0 // time_since_update)
irq_current = {
'irq_line': irq_line,
'irq_rate': irq_rate,
'key': self.get_key(),
'time_since_update': time_since_update
}
self.stats.append(irq_current)
self.lasts[irq_line] = current_irqs
except (OSError, IOError):
pass
return self.stats
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