/usr/bin/pmiostat is in pcp 3.9.10.
This file is owned by root:root, with mode 0o755.
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 | #!/usr/bin/python
#
# Copyright (C) 2014 Red Hat.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Iostat Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program 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 General Public License
# for more details.
#
# pylint: disable=C0103,R0914,R0902
""" Display disk and device-mapper I/O statistics """
import sys
from pcp import pmapi, pmcc
from cpmapi import PM_TYPE_U64, PM_CONTEXT_ARCHIVE, PM_SPACE_KBYTE
IOSTAT_SD_METRICS = [ "disk.dev.read", "disk.dev.read_bytes",
"disk.dev.write", "disk.dev.write_bytes",
"disk.dev.read_merge", "disk.dev.write_merge",
"disk.dev.blkread", "disk.dev.blkwrite",
"disk.dev.read_rawactive", "disk.dev.write_rawactive",
"disk.dev.avactive"]
IOSTAT_DM_METRICS = [ "disk.dm.read", "disk.dm.read_bytes",
"disk.dm.write", "disk.dm.write_bytes",
"disk.dm.read_merge", "disk.dm.write_merge",
"disk.dm.blkread", "disk.dm.blkwrite",
"disk.dm.read_rawactive", "disk.dm.write_rawactive",
"disk.dm.avactive"]
class IostatReport(pmcc.MetricGroupPrinter):
Hcount = 0
def timeStampDelta(self, group):
c = 1000000.0 * group.timestamp.tv_sec + group.timestamp.tv_usec
p = 1000000.0 * group.prevTimestamp.tv_sec + group.prevTimestamp.tv_usec
return (c - p) / 1000000.0
def instlist(self, group, name):
return dict(map(lambda x: (x[1], x[2]), group[name].netValues)).keys()
def curVals(self, group, name):
return dict(map(lambda x: (x[1], x[2]), group[name].netValues))
def prevVals(self, group, name):
return dict(map(lambda x: (x[1], x[2]), group[name].netPrevValues))
def report(self, manager):
if "dm" in IostatOptions.xflag:
subtree = "disk.dm"
else:
subtree = "disk.dev"
group = manager["iostat"]
if group[subtree + ".read_merge"].netPrevValues == None:
# need two fetches to report rate converted counter metrics
return
instlist = self.instlist(group, subtree + ".read")
dt = self.timeStampDelta(group)
timestamp = group.contextCache.pmCtime(long(group.timestamp)).rstrip()
c_rrqm = self.curVals(group, subtree + ".read_merge")
p_rrqm = self.prevVals(group, subtree + ".read_merge")
c_wrqm = self.curVals(group, subtree + ".write_merge")
p_wrqm = self.prevVals(group, subtree + ".write_merge")
c_r = self.curVals(group, subtree + ".read")
p_r = self.prevVals(group, subtree + ".read")
c_w = self.curVals(group, subtree + ".write")
p_w = self.prevVals(group, subtree + ".write")
c_rkb = self.curVals(group, subtree + ".read_bytes")
p_rkb = self.prevVals(group, subtree + ".read_bytes")
c_wkb = self.curVals(group, subtree + ".write_bytes")
p_wkb = self.prevVals(group, subtree + ".write_bytes")
c_ractive = self.curVals(group, subtree + ".read_rawactive")
p_ractive = self.prevVals(group, subtree + ".read_rawactive")
c_wactive = self.curVals(group, subtree + ".write_rawactive")
p_wactive = self.prevVals(group, subtree + ".write_rawactive")
c_avactive = self.curVals(group, subtree + ".avactive")
p_avactive = self.prevVals(group, subtree + ".avactive")
# check availability
if p_rrqm == {} or p_wrqm == {} or p_r == {} or p_w == {} or p_rkb == {} \
or p_wkb == {} or p_ractive == {} or p_wactive == {} or p_avactive == {}:
# no values (near start of archive?)
return
if "h" not in IostatOptions.xflag:
self.Hcount += 1
if self.Hcount == 24:
self.Hcount = 1
if self.Hcount == 1:
if "t" in IostatOptions.xflag:
heading = ('# Timestamp', 'Device', 'rrqm/s', 'wrqm/s', 'r/s', 'w/s', 'rkB/s', 'wkB/s',
'avgrq-sz', 'avgqu-sz', 'await', 'r_await', 'w_await', '%util')
print "%-24s %-12s %7s %7s %6s %6s %8s %8s %8s %8s %7s %7s %7s %5s" % heading
else:
heading = ('# Device', 'rrqm/s', 'wrqm/s', 'r/s', 'w/s', 'rkB/s', 'wkB/s',
'avgrq-sz', 'avgqu-sz', 'await', 'r_await', 'w_await', '%util')
print "%-12s %7s %7s %6s %6s %8s %8s %8s %8s %7s %7s %7s %5s" % heading
for inst in instlist:
# basic stats
rrqm = (c_rrqm[inst] - p_rrqm[inst]) / dt
wrqm = (c_wrqm[inst] - p_wrqm[inst]) / dt
r = (c_r[inst] - p_r[inst]) / dt
w = (c_w[inst] - p_w[inst]) / dt
rkb = (c_rkb[inst] - p_rkb[inst]) / dt
wkb = (c_wkb[inst] - p_wkb[inst]) / dt
# totals
tot_rios = (float)(c_r[inst] - p_r[inst])
tot_wios = (float)(c_w[inst] - p_w[inst])
tot_ios = (float)(tot_rios + tot_wios)
# total active time in seconds (same units as dt)
tot_active = (float)(c_avactive[inst] - p_avactive[inst]) / 1000.0
avgrqsz = avgqsz = await = r_await = w_await = util = 0.0
# average request size units are KB (sysstat reports in units of sectors)
if tot_ios:
avgrqsz = (float)((c_rkb[inst] - p_rkb[inst]) + (c_wkb[inst] - p_wkb[inst])) / tot_ios
# average queue length
avgqsz = (float)((c_ractive[inst] - p_ractive[inst]) + (c_wactive[inst] - p_wactive[inst])) / dt / 1000.0
# await, r_await, w_await
if tot_ios:
await = ((c_ractive[inst] - p_ractive[inst]) + (c_wactive[inst] - p_wactive[inst])) / tot_ios
if tot_rios:
r_await = (c_ractive[inst] - p_ractive[inst]) / tot_rios
if tot_wios:
w_await = (c_wactive[inst] - p_wactive[inst]) / tot_wios
# device utilization (percentage of active time / interval)
if tot_active:
util = 100.0 * tot_active / dt
if "t" in IostatOptions.xflag:
print "%-24s %-12s %7.1f %7.1f %6.1f %6.1f %8.1f %8.1f %8.2f %8.2f %7.1f %7.1f %7.1f %5.1f" \
% (timestamp, inst, rrqm, wrqm, r, w, rkb, wkb, avgrqsz, avgqsz, await, r_await, w_await, util)
else:
print "%-12s %7.1f %7.1f %6.1f %6.1f %8.1f %8.1f %8.2f %8.2f %7.1f %7.1f %7.1f %5.1f" \
% (inst, rrqm, wrqm, r, w, rkb, wkb, avgrqsz, avgqsz, await, r_await, w_await, util)
class IostatOptions(pmapi.pmOptions):
# class attributes
xflag = []
def extraOptions(self, opt, optarg, index):
if opt == "x":
IostatOptions.xflag = optarg.replace(',', ' ').split(' ')
else:
print "Warning: option '", opt, "' not recognised"
def __init__(self):
pmapi.pmOptions.__init__(self, "A:a:D:h:O:S:s:T:t:VZ:z?x:")
self.pmSetLongOptionHeader("General options:")
self.pmSetLongOptionAlign()
self.pmSetLongOptionArchive()
self.pmSetLongOptionDebug()
self.pmSetLongOptionHost()
self.pmSetLongOptionOrigin()
self.pmSetLongOptionStart()
self.pmSetLongOptionSamples()
self.pmSetLongOptionFinish()
self.pmSetLongOptionInterval()
self.pmSetLongOptionVersion()
self.pmSetLongOptionTimeZone()
self.pmSetLongOptionHostZone()
self.pmSetLongOptionHelp()
self.pmSetOptionCallback(self.extraOptions)
self.pmSetLongOptionText(" -x comma separated extended options: [dm][,t][,h]")
self.pmSetLongOptionText(" dm show device-mapper statistics (default is sd devices)")
self.pmSetLongOptionText(" t precede every line with a timestamp in ctime format");
self.pmSetLongOptionText(" h suppress headings");
if __name__ == '__main__':
try:
manager = pmcc.MetricGroupManager.builder(IostatOptions(), sys.argv)
if "dm" in IostatOptions.xflag :
manager["iostat"] = IOSTAT_DM_METRICS
else:
manager["iostat"] = IOSTAT_SD_METRICS
manager.printer = IostatReport()
sts = manager.run()
sys.exit(sts)
except pmapi.pmErr, error:
print '%s: %s\n' % (error.progname(), error.message())
except pmapi.pmUsageErr, usage:
print usage.message()
sys.exit(1)
except KeyboardInterrupt:
pass
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