RFR: 8355003: Implement JEP 515: Ahead-of-Time Method Profiling [v23]

Igor Veresov iveresov at openjdk.org
Thu May 22 20:25:21 UTC 2025


> Improve warm-up time by making profile data from a previous run of an application instantly available, when the HotSpot Java Virtual Machine starts. Specifically, enhance the [AOT cache](https://openjdk.org/jeps/483) to store method execution profiles from training runs, reducing profiling delays in subsequent production runs.
> 
> More details in the JEP: https://bugs.openjdk.org/browse/JDK-8325147

Igor Veresov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 88 commits:

 - Merge branch 'master' into pp2
 - Merge branch 'master' into pp2
 - 8357284: runtime/cds/appcds/aotProfile/AOTProfileFlags.java fails on non-debug platform
 - 8357283: compiler/debug/TestStressBailout.java hangs when running with AOT cache
 - Merge branch 'master' into pp2
 - Address Ioi's comments
 - Merge branch 'master' into pp2
 - Address Ioi's comments
 - 8356885: Don't emit C1 profiling for casts if TypeProfileCasts is off
   
   Reviewed-by: vlivanov, kvn
 - 8352755: Misconceptions about j.text.DecimalFormat digits during parsing
   
   Reviewed-by: naoto
 - ... and 78 more: https://git.openjdk.org/jdk/compare/139a05d0...7a350671

-------------

Changes: https://git.openjdk.org/jdk/pull/24886/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24886&range=22
  Stats: 3324 lines in 59 files changed: 3111 ins; 100 del; 113 mod
  Patch: https://git.openjdk.org/jdk/pull/24886.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24886/head:pull/24886

PR: https://git.openjdk.org/jdk/pull/24886


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