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CI red fix per the all-CI-green mandate; same pattern as the KNELCa/ KNELInventory fixes. No behavior change. CI evidence: https://git.knownelement.com/KNEL/KNELPerf/actions Ticket: https://projects.knownelement.com/issues/784
64 lines
2.5 KiB
Bash
Executable File
64 lines
2.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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# KNELPerf day/night resource profile engine.
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#
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# Broken out of ultix staged/ukrrs-daynight.sh (2026-09-06, #826) and
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# redesigned: slice names, devices, and all numeric knobs are CONF-driven
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# (no host-specific hardcoding); slice targets are a list so any host can
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# run it. Runtime-only changes (set-property --runtime + sysctl + readahead):
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# a reboot always lands safely in day mode, because slice unit files carry
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# the day defaults (unchanged ultix invariant).
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#
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# Usage: knelperf-daynight.sh [--conf FILE] day|night
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set -euo pipefail
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CONF=${KNELPERF_DAYNIGHT_CONF:-/etc/knelperf/daynight.conf}
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while [ $# -gt 0 ]; do
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case "$1" in
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--conf) CONF=$2; shift 2 ;;
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day|night) MODE=$1; shift ;;
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*) echo "usage: $0 [--conf FILE] day|night" >&2; exit 2 ;;
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esac
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done
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[ "${MODE:-}" ] || { echo "usage: $0 [--conf FILE] day|night" >&2; exit 2; }
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[ -r "$CONF" ] && . "$CONF"
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# Targets: "slice:CPUWeight:AllowedCPUs:MemoryHigh" per mode, space-separated.
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# Empty fields mean "skip that property". See knelperf-daynight.conf.example.
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: "${DAY_SLICES:=}"; : "${NIGHT_SLICES:=}"
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# Block devices for readahead tuning (space-separated; partitions auto-appended).
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: "${BLOCK_DEVS:=}"
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: "${DATA_RA_DAY:=256}"; : "${DATA_RA_NIGHT:=2048}"
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: "${DIRTY_DAY:=1073741824}"; : "${DIRTY_NIGHT:=2147483648}"
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: "${DIRTY_BG_DAY:=268435456}"; : "${DIRTY_BG_NIGHT:=536870912}"
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log() { echo "[knelperf-daynight] $*"; }
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ra=$DATA_RA_DAY; dirty=$DIRTY_DAY; dirtybg=$DIRTY_BG_DAY; slices=$DAY_SLICES
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[ "$MODE" = night ] && { ra=$DATA_RA_NIGHT; dirty=$DIRTY_NIGHT; dirtybg=$DIRTY_BG_NIGHT; slices=$NIGHT_SLICES; }
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apply_slice() { # "slice:weight:cpus:memhigh"
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local spec=$1 slice weight cpus memhigh
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IFS=: read -r slice weight cpus memhigh <<< "$spec"
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[ -n "$slice" ] || return 0
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local -a props=()
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[ -n "$weight" ] && props+=(CPUWeight="$weight")
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[ -n "$cpus" ] && props+=(AllowedCPUs="$cpus")
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[ -n "$memhigh" ] && props+=(MemoryHigh="$memhigh")
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if [ ${#props[@]} -gt 0 ]; then
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systemctl set-property --runtime "$slice" "${props[@]}" \
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|| log "WARN: set-property failed for $slice (slice not loaded?)"
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fi
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}
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for spec in $slices; do apply_slice "$spec"; done
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if [ -n "$BLOCK_DEVS" ]; then
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for dev in $BLOCK_DEVS; do
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blockdev --setra "$ra" "$dev" 2>/dev/null || log "readahead skip: $dev"
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for part in "${dev}"[0-9]*; do
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if [ -e "$part" ]; then blockdev --setra "$ra" "$part" 2>/dev/null || true; fi
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done
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done
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fi
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sysctl -q -w vm.dirty_bytes="$dirty" vm.dirty_background_bytes="$dirtybg"
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log "profile $MODE applied $(date -Is)"
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