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2de9e59be6
Change-Id: I369beb7a790fbb94bf2c1e9a823734434ea3b3da Reviewed-by: Ville-Pekka Karhu <ville-pekka.karhu@qt.io>
27 lines
935 B
Bash
Executable File
27 lines
935 B
Bash
Executable File
#!/bin/sh
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# Measure I/O latency once, return data in InfluxDB format
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#
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# Run one ioping command for read, and one for write.
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# Each one sends 3 requests and reports the minimum time, in nanoseconds.
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# (Because of limitations of ioping, we can't just send one request and get
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# the number back in the batch format. Additionally, the number seems to be
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# fluctuating quite a bit so taking the smallest number out of 3 requests is
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# stabilising it a bit.)
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set -e
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[ -z "$1" ] && echo "$0 takes a path as a first argument" && exit 1
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# Try to run in high priority to avoid slow-downs because of
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# factors other than I/O.
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renice -n -10 -p $$ >/dev/null 2>&1 || true
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rlatency="$(/usr/local/bin/ioping -B -k -c 3 -i 0.1 "$1" | cut -d " " -f 5)"
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wlatency="$(/usr/local/bin/ioping -B -k -c 3 -i 0.1 -W "$1" | cut -d " " -f 5)"
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printf "ioping,path=$1 read_latency_ns=%u,write_latency_ns=%u\n" \
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"$rlatency" "$wlatency"
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