#!/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/^\[[^]]*\]//'