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#!/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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