mirror of
https://github.com/kuhyx/testsAndMisc.git
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Krzysztof kuhy Rudnicki
afe6ac3a33
shfmt runs on every staged shell file and rewrites drifted libs, which moves coverage denominators and invalidates measurements taken minutes earlier. Landing the reformat first makes every number measured from here the number that survives pre-commit. thorium_repairs.sh converts from 2-space indent to tabs; the other two only lose runs of blank lines. `git diff -w` shows no token changed, shellcheck is clean, and the 20-file suite stays green. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
125 lines
3.8 KiB
Bash
Executable File
125 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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