asmhatre/zgc-jdk25-benchmarks
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Add jdk27-memory: compact object headers and G1-everywhere on a Spring Boot service

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Spring Boot 4.1.1 catalog service measured on JDK 25, 26 and 27: live heap 320 MB to 273 MB with compact headers, per-class bytes per instance, container-sizing sweeps with real cgroup limits, 1-CPU Serial vs G1 with Native Memory Tracking, removed flags (MaxRAM, UseCompressedClassPointers), and a kernel OOM-kill check. Outputs in jdk27-memory/output.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
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Claude
2026-09-24 15:09:55 +00:00
parent e189da79ba
commit e83c9949d8
29 changed files with 1041 additions and 0 deletions
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jdk27-memory/scripts/offsets.sh
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#!/usr/bin/env bash
source "$(dirname "$0")/lib.sh"
cd "$MOD/src/offsets"
for cfg in "25||$JDK25" "26||$JDK26" "27||$JDK27" "27|-XX:-UseCompactObjectHeaders|$JDK27"; do
IFS='|' read -r v fl jh <<<"$cfg"
echo "== JDK $v $fl"
"$jh/bin/java" $fl --sun-misc-unsafe-memory-access=allow Offsets.java 2>&1
echo
done