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KNELPerf/loop/baseline-diff.sh
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mrcharles 25299373f7
ci / audit (push) Failing after 26s
KNELPerf v2 wave 1: Ultix scheduler breakout + loop skeleton + reports (#826)
- scheduler/: day/night engine (conf-driven redesign), psi/perfsnap collectors,
  proxmox-ctl, systemd timer templates — ported from ~/projects/ultix per the
  breakout map in scheduler/README.md
- loop/: perf-loop driver (baseline/audit/tweak/rebaseline), cpu-bench (new CPU
  leg), baseline-diff (tolerance compare) — smoke-tested locally
- docs/ARCHITECTURE.md: full program design (loop, resource groups, VM/spindle
  balancing, k8s-vs-Slurm, beszel+RAPL/iDRAC telemetry spine, workload classes,
  solar/HA + two-site power economics)
- docs/report-amt-power-telemetry.md + docs/report-moonlight-desktop.md

Redmine: https://projects.knownelement.com/issues/826#note-2
2026-09-06 14:16:54 -05:00

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#!/usr/bin/env bash
# KNELPerf baseline diff — compares two baseline bundles (or live-audits one).
#
# baseline-diff.sh <dirA> <dirB> compare two stored bundles
# Values are TSV metric/value/unit rows from cpu-bench.tsv. Numeric metrics
# compare with a tolerance (default 10%); non-numeric metrics compare for
# equality (governor flips are exactly what we want to catch).
set -euo pipefail
TOL_PCT=${KNELPERF_DIFF_TOL:-25} # 1-thread openssl on a busy host swings >10% run-to-run
[ $# = 2 ] || { echo "usage: $0 <dirA> <dirB>" >&2; exit 2; }
A=$1; B=$2
[ -r "$A/cpu-bench.tsv" ] || { echo "no cpu-bench.tsv in $A" >&2; exit 3; }
[ -r "$B/cpu-bench.tsv" ] || { echo "no cpu-bench.tsv in $B" >&2; exit 3; }
join_tsv() { awk -F'\t' 'NR==FNR{a[$1]=$2;next} {print $1"\t"a[$1]"\t"$2"\t"$3}' "$1" "$2"; }
# shellcheck disable=SC2034 # exit-status reserved for future strictness
status=0
join_tsv "$A/cpu-bench.tsv" "$B/cpu-bench.tsv" | while IFS=$'\t' read -r metric va vb unit; do
[ -n "$va" ] && [ -n "$vb" ] || continue
if [ "$va" = "$vb" ]; then
printf 'OK %-28s %s = %s %s\n' "$metric" "$va" "$vb" "$unit"
elif [ "$va" = "${va#[-+0-9.]}" ] || [ "$vb" = "${vb#[-+0-9.]}" ]; then
printf 'DRIFT %-28s %s -> %s %s\n' "$metric" "$va" "$vb" "$unit"
else
delta=$(awk -v a="$va" -v b="$vb" 'BEGIN{d=(b-a)/((a==0)?1:a)*100; printf "%+.1f", d}')
flag=$(awk -v d="${delta#+}" -v t="$TOL_PCT" 'BEGIN{m=d<0?-d:d; if(m>t) print "DELTA"; else print "OK"}')
if [ "$flag" = OK ]; then
printf 'OK %-28s %s -> %s (%s%%) %s\n' "$metric" "$va" "$vb" "$delta" "$unit"
else
printf 'DELTA %-28s %s -> %s (%s%%) %s\n' "$metric" "$va" "$vb" "$delta" "$unit"
fi
fi
done
echo "tolerance: ${TOL_PCT}% (set KNELPERF_DIFF_TOL to change)"