29 lines
1022 B
Bash
Executable File
29 lines
1022 B
Bash
Executable File
#!/usr/bin/env bash
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# CPU utilisation (%) averaged over the interval since the PREVIOUS status refresh:
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# /proc/stat totals persist in a state file between runs (same pattern as net.sh),
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# so the value covers the whole status-interval. (The old version slept 0.3s and
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# sampled just that window — a 6% duty cycle that aliased bursty loads.) No sleep,
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# ~5ms. First run (no state yet) shows the since-boot average. Glyph = Waybar's
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# cpu module icon (U+F035B).
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printf '\U000f035b '
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rt="${XDG_RUNTIME_DIR:-/tmp}"
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st="$rt/tmux_cpu_stat" # previous totals: tot idle
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read -r _ u n s i w rest </proc/stat
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idle=$((i + w))
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tot=$((u + n + s + i + w))
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for v in $rest; do tot=$((tot + v)); done
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p_tot=0
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p_idle=0
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[ -r "$st" ] && read -r p_tot p_idle <"$st"
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[ "$p_tot" -gt "$tot" ] && {
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p_tot=0
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p_idle=0
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} # stale state from a previous boot
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printf '%s %s\n' "$tot" "$idle" >"$st"
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dt=$((tot - p_tot))
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di=$((idle - p_idle))
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if [ "$dt" -le 0 ]; then printf -- '--%%'; else printf '%d%%' $(((100 * (dt - di) + dt / 2) / dt)); fi
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