[crac] RFR: RFC: -XX:CPUFeatures=0xnumber for CPU migration [v2]

[Anton Kozlov]

On Thu, 2 Feb 2023 14:50:18 GMT, Dan Heidinga <heidinga at openjdk.org> wrote:

> > Ashutosh suggested an alternative approach back in Feb 2022 [0] [1] of providing a single "-XX:[+-]PortableCode" with a common enough baseline set of features
> 
> IIUC you can just use `-XX:CPUFeatures=0` with this patch for the same effect.

That's nice! Since portability affects the final perfomance on restore, the user should have a control between portability and performance. CPUFeatures=0 looks indeed as an impelmentation of some -XX:+PortableCode that was proposed before.

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PR: https://git.openjdk.org/crac/pull/41