mirror of
https://github.com/kuhyx/testsAndMisc.git
synced 2026-11-11 21:34:05 +01:00
Krzysztof kuhy Rudnicki
63650fbc45
setup_offline_docs.sh 713 -> 121 across six libs, carved one language at a time since the first cut left offline_cpp at 545. optimize_arch_ desktop.sh 623 -> 118. Two recurring traps again: a script with no SCRIPT_DIR at all, and libs that chained rather than being sourced from the entry. Both now checked for routinely. libre_translate.sh is reverted and stays at 488. Exporting GENERATED to fix one SC2034 revealed eighteen more - when a fix uncovers more of the same, the seam is imaginary, not the fix wrong. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
127 lines
3.8 KiB
Bash
Executable File
127 lines
3.8 KiB
Bash
Executable File
#!/bin/bash
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# CPU governor and IO scheduler tweaks.
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#
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# Sourced by optimize_arch_desktop.sh; split out to keep it under the 250-line cap.
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# Sourced rather than run, so it inherits the caller's strict mode and
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# the helper functions and variables defined above the source line.
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# ===================================================================
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# 1. CPU Governor → performance
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# ===================================================================
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tweak_cpu_governor() {
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local gov_files
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gov_files=$(find /sys/devices/system/cpu -maxdepth 3 -name scaling_governor 2>/dev/null || true)
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if [[ -z $gov_files ]]; then
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log_warn "No CPU governor sysfs files found — skipping."
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return 0
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fi
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# Check current state
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local all_performance=true
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local f
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for f in $gov_files; do
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if [[ $(cat "$f") != "performance" ]]; then
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all_performance=false
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break
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fi
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done
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if [[ $all_performance == "true" ]]; then
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log_ok "All CPU cores already on 'performance' governor — skipping."
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return 0
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fi
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for f in $gov_files; do
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echo "performance" >"$f"
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done
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# Make it persistent via a sysctl-style drop-in using udev rule
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local udev_rule="/etc/udev/rules.d/60-cpu-governor-performance.rules"
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if [[ ! -f $udev_rule ]]; then
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cat >"$udev_rule" <<'UDEVEOF'
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# Set CPU governor to performance on all cores at boot
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SUBSYSTEM=="module", DEVPATH=="*/cpu/*", ATTR{scaling_governor}=="*", ATTR{scaling_governor}="performance"
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UDEVEOF
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fi
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# Also install cpupower hook as a more reliable persistence method
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local cpupower_conf="/etc/default/cpupower"
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if has_cmd cpupower; then
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if [[ ! -f $cpupower_conf ]] || ! grep -q "^governor='performance'" "$cpupower_conf" 2>/dev/null; then
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mkdir -p "$(dirname "$cpupower_conf")"
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cat >"$cpupower_conf" <<'CPUEOF'
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# /etc/default/cpupower — managed by optimize_arch_desktop.sh
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governor='performance'
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CPUEOF
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systemctl enable cpupower.service 2>/dev/null || true
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fi
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fi
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return 0
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}
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# ===================================================================
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# 2. I/O Scheduler per drive type
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# ===================================================================
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tweak_io_scheduler() {
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local changed=false
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local block_dev
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for block_dev in /sys/block/sd* /sys/block/nvme* /sys/block/vd*; do
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[[ -d $block_dev ]] || continue
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local sched_file="$block_dev/queue/scheduler"
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[[ -f $sched_file ]] || continue
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local dev_name
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dev_name=$(basename "$block_dev")
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local rotational
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rotational=$(cat "$block_dev/queue/rotational" 2>/dev/null || echo 1)
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local current
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current=$(sed 's/.*\[\(.*\)\].*/\1/' "$sched_file" 2>/dev/null || true)
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local target
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if [[ $dev_name == nvme* ]]; then
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target="none"
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elif [[ $rotational -eq 0 ]]; then
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target="mq-deadline"
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else
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target="bfq"
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fi
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if [[ $current == "$target" ]]; then
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log_ok "$dev_name: already using '$target' scheduler."
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continue
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fi
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echo "$target" >"$sched_file" 2>/dev/null || true
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log_info "$dev_name: scheduler changed from '$current' to '$target'."
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changed=true
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done
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# Persist via udev rule
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local udev_rule="/etc/udev/rules.d/60-io-scheduler.rules"
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if [[ ! -f $udev_rule ]]; then
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cat >"$udev_rule" <<'IOEOF'
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# NVMe: no scheduler (multi-queue hardware handles it)
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ACTION=="add|change", KERNEL=="nvme[0-9]*", ATTR{queue/scheduler}="none"
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# SATA SSD: mq-deadline (low latency)
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ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="mq-deadline"
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# HDD: BFQ (fair bandwidth allocation)
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ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
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IOEOF
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fi
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if [[ $changed == "false" ]]; then
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log_ok "All I/O schedulers already optimal."
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fi
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return 0
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}
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# ===================================================================
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# Apply all tweaks
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# ===================================================================
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