mirror of
https://github.com/kuhyx/testsAndMisc.git
synced 2026-07-04 15:03:01 +02:00
Krzysztof kuhy Rudnicki
c8c727e9d5
Resource-usage report showed ~29 cores of average load coming from i3blocks helper scripts forking awk/tr/grep/bc/sensors/nvidia-smi every tick. Rewrite all five hot-path scripts to eliminate forks: - volume.sh: persist mode, blocks on 'pactl subscribe' event stream. No polling, no sleep, no fork per tick. - gpu_monitor.sh: persist mode, single long-lived 'nvidia-smi --loop=5' feeds a bash 'while read' loop. Falls back to /sys for amdgpu. - battery_status.sh: reads /sys/class/power_supply/BAT*/ directly. Zero forks; replaces 'acpi | awk' pipeline. - cpu_monitor.sh: reads /proc/loadavg and k10temp/coretemp /sys/class/hwmon. Zero forks; replaces 'sensors | awk | tr' + bc arithmetic. - motherboard_temp.sh: reads nct*/it*/f71* Super-I/O hwmon node directly. Zero forks. Configure volume + gpu_monitor with interval=persist so i3blocks keeps one long-lived producer each instead of forking per tick. Also add: - kill_stale_recorders.sh -- kill stray ffmpeg x11grab / dotnet-trace / dotnet-monitor processes left running after sessions. - monitors.slice -- resource-capped user slice (CPUQuota=50%, MemoryMax=512M, MemorySwapMax=0 for zram safety, TasksMax=256) to bound future monitoring regressions. - efficient-polling-scripts SKILL -- rules for writing status-bar and polling scripts without forks; fork-pipeline to bash-builtin translation table; verification checklist. Verified live: strace -c on cpu_monitor.sh shows 1 execve / 0 clones; persist producers (pactl subscribe, nvidia-smi --loop) show 0 CPU ticks over a 3s idle sample. Per-invocation timing 1.6-1.9 ms (was 30-80 ms).
42 lines
1007 B
Bash
Executable File
42 lines
1007 B
Bash
Executable File
#!/bin/bash
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# i3blocks persist-mode volume indicator.
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#
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# Event-driven: blocks in `read` on the `pactl subscribe` event stream.
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# No sleep, no polling loop, no awk/tr/grep forks. One pactl-subscribe
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# process stays alive; two short pactl calls run only on actual events.
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#
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# Configure with `interval=persist` in the i3blocks config.
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set -u
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GREEN='#50FA7B'
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RED='#FF5555'
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emit() {
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local raw mute vol icon color
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raw=$(pactl get-sink-volume @DEFAULT_SINK@ 2> /dev/null) || return 0
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if [[ $raw =~ ([0-9]+)% ]]; then
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vol=${BASH_REMATCH[1]}
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else
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vol=0
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fi
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mute=$(pactl get-sink-mute @DEFAULT_SINK@ 2> /dev/null) || return 0
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if [[ $mute == *yes ]]; then
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icon='🔇'
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color=$RED
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else
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icon='🔊'
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color=$GREEN
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fi
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printf '%s %s%%\n\n%s\n' "$icon" "$vol" "$color"
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}
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emit
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# `read -r` blocks on the event stream — no busy-wait, no sleep.
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pactl subscribe 2> /dev/null | while read -r line; do
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[[ $line == *"on sink"* || $line == *"on server"* ]] || continue
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emit
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done
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