Blame tests/p_sysstat/15-mpstat-basic.sh

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#!/bin/bash
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# Author: Steve Barnes (steve@echo.id.au)
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# A simple mpstat test to verify cpu load is being measured
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t_Log "Running $0 - a simple mpstat test to verify cpu load is being measured"
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# Save our iostat output somewhere
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TMP=/tmp/mpstat.scratch
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# Clean up after ourselves
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trap "[ -e $TMP ] && { /bin/rm -f $TMP; }" EXIT
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# Run iostat on the first CPU
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/usr/bin/mpstat -P 0 1 5 >$TMP &
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# Let the dust settle
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sleep 1
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# Give the CPU something to chew on
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/bin/dd if=/dev/urandom bs=1k count=10000 2>/dev/null|sha1sum -b - &>/dev/null
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# Give mpstat a chance to log our task
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sleep 3
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# Confirm our read bytes are >0, excluding the first 
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# line since that's the average since boot.
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CPU_SYS_PCENT=$(awk '$6 ~ /[0-9]\./ {$6>a ? a=$6 : $6} END {print int(a)}' $TMP)
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# Check mpstat registered some level of cpu activity
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[ "$CPU_SYS_PCENT" -gt 5 ] || { t_Log "mpstat didn't log any CPU activity?!...that ain't good"; exit $FAIL; }
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t_CheckExitStatus $?