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42 lines
1.0 KiB
42 lines
1.0 KiB
#!/bin/bash
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# Author: Steve Barnes (steve@echo.id.au)
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# A simple iostat test to verify cpu loads are being recorded
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t_Log "Running $0 - a basic iostat test to verify cpu measurement"
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# Save our iostat output
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output_file=$(mktemp)
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trap "rm -f ${output_file}" EXIT
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# Clear out the pagecache to get an accurate reading
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echo 1 > /proc/sys/vm/drop_caches
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# Capture a storage device name
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drive=$(fdisk -l|grep -Po -m1 '^/dev/[\D]+')
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# Run iostat on the cpu
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/usr/bin/iostat -c 1 5 >${output_file} 2>&1 &
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# Time for iostat booting
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sleep 1
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# Give the CPU something to chew on
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/bin/dd if=$drive bs=4k count=25000 2>/dev/null|sha1sum -b - &>/dev/null
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# Give iostat a chance to log our task
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sleep 6
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# Extract the CPU utilisation (user field, percentage)
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cpu_user_percent=$(awk '$1 ~ /[0-9]/ {$1>a ? a=$1 : $1} END {print int(a)}' ${output_file})
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# Confirm the CPU registered some level of user activity
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if [ "$cpu_user_percent" -eq 0 ]; then
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t_Log "FAIL: ${0}: no cpu activity registered"
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cat ${output_file}
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t_CheckExitStatus 1
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fi
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t_CheckExitStatus 0
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