[jdk21u-dev] RFR: 8310513: [s390x] Intrinsify recursive ObjectMonitor locking [v2]

[Amit Kumar]

> Hi all,
> 
> This pull request contains a backport of commit [47df1459](https://github.com/openjdk/jdk/commit/47df14590c003ccb1607ec0edfe999fcf2aebd86) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Amit Kumar on 10 Apr 2024 and was reviewed by Lutz Schmidt and Martin Doerr.
> 
> Thanks!
> 
> Benchmarking: 
> 
> ./build/linux-s390x-server-release/jdk/bin/java -Xms4g -Xmx4g -jar dacapo-9.12-MR1-bach.jar h2 -s huge -t 1 -n 1
> 
> Without the patch:
> 
> ===== DaCapo 9.12-MR1 h2 PASSED in 209768 msec ===== 
> ===== DaCapo 9.12-MR1 h2 PASSED in 197472 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 222872 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 215725 msec =====
> 
> 
> with patch: 
> ===== DaCapo 9.12-MR1 h2 PASSED in 171055 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 169696 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 174032 msec =====
> ===== DaCapo 9.12-MR1 h2 PASSED in 167271 msec =====

Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:

  revert oracle copyright headers

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/537/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/537/files/50b25633..6d3ea211

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=537&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=537&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/537.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/537/head:pull/537

PR: https://git.openjdk.org/jdk21u-dev/pull/537