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shenandoah-jdk28: add GC event counts per run (output/04-gc-events.txt)

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01HmvoHH3ZnCEaPNXRpDxDZe
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Claude
2026-10-24 10:54:20 +00:00
parent b25bd65d4b
commit 1745e14829
3 changed files with 36 additions and 1 deletions
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shenandoah-jdk28/scripts/log-events.sh
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#!/usr/bin/env bash
# Counts stall-related events in the Shenandoah GC logs left in target/gclogs by bench-one.sh, and prints the
# verbatim log lines for two of them. Output is committed as output/04-gc-events.txt.
cd "$(dirname "$0")/../target/gclogs"
echo "run cancelling_gc pause_full pause_degenerated failed_to_allocate"
for f in shenandoah-satb-[1-5].log shenandoah-generational-[1-5].log; do
printf "%-27s %13d %11d %18d %19d\n" "${f%.log}" \
"$(grep -c 'Cancelling GC' "$f")" "$(grep -c 'Pause Full [0-9]' "$f")" \
"$(grep -c 'Pause Degenerated.*ms$' "$f")" "$(grep -ci 'Failed to allocate' "$f")"
done
echo
echo "== shenandoah-generational-4.log: what a 'Cancelling GC' line is (old marking preempted for a young cycle)"
grep -m1 -B1 'Cancelling GC' shenandoah-generational-4.log | sed -E 's/^\[[^]]*\]//'
echo
echo "== shenandoah-generational-1.log: the Pause Full"
grep -m1 'Pause Full [0-9]' shenandoah-generational-1.log | sed -E 's/^\[[^]]*\]//'