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).
76 lines
2.0 KiB
Bash
Executable File
76 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# i3blocks GPU monitor, persist mode.
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#
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# Keeps a single long-lived `nvidia-smi --loop=5` (or reads amdgpu sysfs
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# in a blocking-read loop) instead of forking nvidia-smi/lspci/awk/tr/bc
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# every interval. No sleep, no polling loop in bash — nvidia-smi's own
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# periodic emitter drives updates and we block on `read`.
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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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emit() {
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local temp=$1 load=$2 color
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if [[ $load == 'N/A' ]]; then
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color='#FFFFFF'
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elif ((load < 50)); then
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color='#50FA7B'
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elif ((load < 75)); then
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color='#F1FA8C'
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else
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color='#FF5555'
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fi
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printf '<span color="%s"> %s°C, %s%%</span>\n\n%s\n' \
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"$color" "$temp" "$load" "$color"
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}
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# Prefer NVIDIA if present (persist via --loop).
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if command -v nvidia-smi > /dev/null 2>&1; then
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# One child process for the lifetime of i3blocks; emits CSV every 5s.
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nvidia-smi \
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--query-gpu=temperature.gpu,utilization.gpu \
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--format=csv,noheader,nounits \
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--loop=5 2> /dev/null |
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while IFS=',' read -r temp load; do
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# Strip leading/trailing whitespace using parameter expansion.
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temp=${temp## }
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temp=${temp%% }
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load=${load## }
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load=${load%% }
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[[ -z $temp || -z $load ]] && continue
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emit "$temp" "$load"
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done
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exit 0
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fi
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# AMD fallback: read sysfs directly; emit once (i3blocks restarts on exit).
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amdgpu=''
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for d in /sys/class/hwmon/hwmon*/; do
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[[ -r ${d}name ]] || continue
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read -r n < "${d}name"
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[[ $n == amdgpu ]] && {
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amdgpu=$d
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break
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}
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done
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if [[ -n $amdgpu ]]; then
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temp='N/A'
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if [[ -r ${amdgpu}temp1_input ]]; then
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read -r milli < "${amdgpu}temp1_input"
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temp=$((milli / 1000))
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fi
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load='N/A'
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# drm card matching the amdgpu hwmon exposes gpu_busy_percent.
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for card in /sys/class/drm/card*/device/gpu_busy_percent; do
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[[ -r $card ]] && {
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read -r load < "$card"
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break
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}
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done
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emit "$temp" "$load"
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exit 0
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fi
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printf 'No supported GPU\n\n#FF5555\n'
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