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.

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

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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