#!/usr/bin/env bash
# Runs PinningProbe with the virtual-thread scheduler limited to two carrier threads, so that
# pinning (if it happened) would serialise the work into visible seconds.
#
# The probe is compiled on its own with --release 21 rather than as part of the module, so the
# same class file can be run on a JDK 21 and a JDK 25 JVM. That comparison is the whole point:
# JEP 491 landed in JDK 24, and the difference between the two runs is the feature.
#
# Usage: scripts/pinning-probe.sh <path-to-javac> <path-to-java> [more java binaries...]
set -euo pipefail
cd "$(dirname "$0")/.."
JAVAC_BIN="${1:-javac}"
shift || true
OUT=target/probe-classes
mkdir -p "$OUT"
"$JAVAC_BIN" --release 21 -d "$OUT" src/main/java/com/ankurm/async/PinningProbe.java

for JAVA_BIN in "${@:-java}"; do
  echo "---------------------------------------------------------------"
  "$JAVA_BIN" \
    -Djdk.virtualThreadScheduler.parallelism=2 \
    -Djdk.virtualThreadScheduler.maxPoolSize=2 \
    -cp "$OUT" com.ankurm.async.PinningProbe
done