RFR: 8343249: [Windows] Implement SpinPause [v4]

[David Holmes]

On Wed, 14 Jan 2026 20:40:30 GMT, Saint Wesonga <swesonga at openjdk.org> wrote:

> I don't know if this changes your opinion here but the `-XX:OnSpinWaitInst` and `-XX:OnSpinWaitInstCount` flags are not respected on Windows AArch64 without the AArch64 change in this PR.

AFAICS they are still respected, just not used in relation to `SpinPause`.

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PR Comment: https://git.openjdk.org/jdk/pull/21781#issuecomment-3752996665