43 lines
1.2 KiB
Bash
43 lines
1.2 KiB
Bash
#!/usr/bin/env bash
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#
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# Read memory usage in FreeBSD
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set -euo pipefail
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IFS=$'\n\t'
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DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
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SLEEP_INTERVAL=${SLEEP_INTERVAL:-30}
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while true; do
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# TODO: Why not vm.stats.vm.v_page_size ? Are these the same?
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total_pages=$(sysctl -n vm.stats.vm.v_page_count)
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page_size=$(sysctl -n hw.pagesize)
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active=$(sysctl -n vm.stats.vm.v_active_count)
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inactive=$(sysctl -n vm.stats.vm.v_inactive_count)
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in_use_pages=$((active + inactive))
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free_pages=$((total_pages - in_use_pages))
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free_bytes=$((page_size * free_pages))
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free_percent=$((100 * free_pages / total_pages))
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text=""
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if [ $free_bytes -ge $((1024 * 1024 * 1024)) ]; then
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text="$((free_bytes / 1024 / 1024 / 1024)) GiB"
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elif [ $free_bytes -ge $((1024 * 1024)) ]; then
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text="$((free_bytes / 1024 / 1024)) MiB"
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elif [ $free_bytes -ge 1024 ]; then
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text="$((free_bytes / 1024)) KiB"
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else
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text="$(free_bytes) B"
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fi
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tooltip="${free_percent}%"
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jq --unbuffered --compact-output <<EOF
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{
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"text":"${text}",
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"tooltip":"${tooltip}",
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"percentage":${free_percent}
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}
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EOF
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sleep $SLEEP_INTERVAL
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done
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