RFR: 8365153: AArch64: Set JVM flags for Neoverse N3 and V3 cores
Ruben
duke at openjdk.org
Thu Sep 18 16:34:11 UTC 2025
For Neoverse N1, N2, V1, and V2, the following JVM flags are set:
- UseSIMDForMemoryOps=true
- OnSpinWaitInst=isb
- OnSpinWaitInstCount=1
- AlwaysMergeDMB=false
Additionally, for Neoverse V1 and V2 only, these flags are set:
- UseCryptoPmullForCRC32=true
- CodeEntryAlignment=32
Set the same flags for Neoverse N3 and V3, respectively.
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Commit messages:
- 8365153: AArch64: Set JVM flags for Neoverse N3 and V3 cores
Changes: https://git.openjdk.org/jdk/pull/26701/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26701&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8365153
Stats: 8 lines in 1 file changed: 6 ins; 0 del; 2 mod
Patch: https://git.openjdk.org/jdk/pull/26701.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/26701/head:pull/26701
PR: https://git.openjdk.org/jdk/pull/26701
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