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).
50 lines
1.3 KiB
Bash
Executable File
50 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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# i3blocks battery indicator, zero-fork per invocation.
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#
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# Reads /sys/class/power_supply directly instead of forking `acpi | awk`.
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# Uses only bash builtins (read, printf, arithmetic, parameter expansion).
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set -u
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bat=
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for d in /sys/class/power_supply/BAT*/; do
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[[ -d $d ]] && {
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bat=$d
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break
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}
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done
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if [[ -z $bat ]]; then
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# Desktop with no battery — emit empty block so i3bar hides it.
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echo
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exit 0
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fi
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cap='N/A'
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[[ -r ${bat}capacity ]] && read -r cap < "${bat}capacity"
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status=''
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[[ -r ${bat}status ]] && read -r status < "${bat}status"
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# Compute time remaining from energy_now/power_now (µWh / µW → hours).
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# Falls back to charge_now/current_now on batteries that expose charge instead.
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time_str=''
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num=0
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den=0
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if [[ -r ${bat}energy_now && -r ${bat}power_now ]]; then
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read -r num < "${bat}energy_now"
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read -r den < "${bat}power_now"
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elif [[ -r ${bat}charge_now && -r ${bat}current_now ]]; then
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read -r num < "${bat}charge_now"
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read -r den < "${bat}current_now"
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fi
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if ((den > 0 && num > 0)); then
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total_min=$((num * 60 / den))
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printf -v time_str '%02d:%02d' "$((total_min / 60))" "$((total_min % 60))"
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fi
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printf ' %s%%' "$cap"
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[[ -n $time_str ]] && printf ', %s' "$time_str"
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[[ $status == Charging ]] && printf ', '
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printf '\n'
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