/usr/lib/python3/dist-packages/glances/plugins/glances_diskio.py is in glances 2.1.1-1.
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 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2014 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/>.
"""Disk I/O plugin."""
# Import Glances libs
from glances.core.glances_timer import getTimeSinceLastUpdate
from glances.plugins.glances_plugin import GlancesPlugin
import psutil
class Plugin(GlancesPlugin):
"""Glances' disks I/O plugin.
stats is a list
"""
def __init__(self, args=None):
"""Init the plugin."""
GlancesPlugin.__init__(self, args=args)
# We want to display the stat in the curse interface
self.display_curse = True
# Init the stats
self.reset()
def reset(self):
"""Reset/init the stats."""
self.stats = []
def update(self):
"""Update disk I/O stats using the input method."""
# Reset stats
self.reset()
if self.get_input() == 'local':
# Update stats using the standard system lib
# Grab the stat using the PsUtil disk_io_counters method
# read_count: number of reads
# write_count: number of writes
# read_bytes: number of bytes read
# write_bytes: number of bytes written
# read_time: time spent reading from disk (in milliseconds)
# write_time: time spent writing to disk (in milliseconds)
try:
diskiocounters = psutil.disk_io_counters(perdisk=True)
except:
return self.stats
# Previous disk IO stats are stored in the diskio_old variable
if not hasattr(self, 'diskio_old'):
# First call, we init the network_old var
try:
self.diskio_old = diskiocounters
except (IOError, UnboundLocalError):
pass
else:
# By storing time data we enable Rx/s and Tx/s calculations in the
# XML/RPC API, which would otherwise be overly difficult work
# for users of the API
time_since_update = getTimeSinceLastUpdate('disk')
diskio_new = diskiocounters
for disk in diskio_new:
try:
# Try necessary to manage dynamic disk creation/del
diskstat = {}
diskstat['time_since_update'] = time_since_update
diskstat['disk_name'] = disk
diskstat['read_bytes'] = (
diskio_new[disk].read_bytes -
self.diskio_old[disk].read_bytes)
diskstat['write_bytes'] = (
diskio_new[disk].write_bytes -
self.diskio_old[disk].write_bytes)
except KeyError:
continue
else:
self.stats.append(diskstat)
# Save stats to compute next bitrate
self.diskio_old = diskio_new
elif self.get_input() == 'snmp':
# Update stats using SNMP
# No standard way for the moment...
pass
return self.stats
def msg_curse(self, args=None):
"""Return the dict to display in the curse interface."""
# Init the return message
ret = []
# Only process if stats exist and display plugin enable...
if self.stats == [] or args.disable_diskio:
return ret
# Build the string message
# Header
msg = '{0:9}'.format(_("DISK I/O"))
ret.append(self.curse_add_line(msg, "TITLE"))
msg = '{0:>7}'.format(_("R/s"))
ret.append(self.curse_add_line(msg))
msg = '{0:>7}'.format(_("W/s"))
ret.append(self.curse_add_line(msg))
# Disk list (sorted by name)
for i in sorted(self.stats, key=lambda diskio: diskio['disk_name']):
# Do not display hidden interfaces
if self.is_hide(i['disk_name']):
continue
# Is there an alias for the disk name ?
disk_name = self.has_alias(i['disk_name'])
if disk_name is None:
disk_name = i['disk_name']
# New line
ret.append(self.curse_new_line())
if len(disk_name) > 9:
# Cut disk name if it is too long
disk_name = '_' + disk_name[-8:]
msg = '{0:9}'.format(disk_name)
ret.append(self.curse_add_line(msg))
txps = self.auto_unit(int(i['read_bytes'] // i['time_since_update']))
rxps = self.auto_unit(int(i['write_bytes'] // i['time_since_update']))
msg = '{0:>7}'.format(txps)
ret.append(self.curse_add_line(msg))
msg = '{0:>7}'.format(rxps)
ret.append(self.curse_add_line(msg))
return ret
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