JDK-8321013 : Parallel: Refactor ObjectStartArray
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 22
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2023-11-29
  • Updated: 2025-02-17
  • Resolved: 2023-12-06
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JDK 22
22 b27Fixed
Related Reports
Relates :  
JDK-8322501 - 22-b27: Regression in SPECjvm2008-Crypto.signverify-ParGC on Windows-x64
Relates :  
JDK-8350130 - Performance Degradation with Default ParallelGC in Hotspot JDK on Ubuntu
Sub Tasks
JDK-8323579 :  
Release Note: Parallel: Better GC Throughput with Large Object Arrays - Resolved
Description
ObjectStartArray is essentially the BlockOffsetTable in Serial/G1. Use the same algorithm for consistency.
Comments
From the PR description: "There is ~20% reduction in young-gc pause, using card_scan.java from https://bugs.openjdk.org/browse/JDK-8310031"
20-12-2023
Changeset: 50baaf46 Author: Albert Mingkun Yang <ayang@openjdk.org> Date: 2023-12-06 21:58:56 +0000 URL: https://git.openjdk.org/jdk/commit/50baaf46b71f6d55281043ef185ac277c2db558e
06-12-2023
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/16884 Date: 2023-11-29 14:54:01 +0000
29-11-2023