RFR: 8309136: [JVMCI] add -XX:+UseGraalJIT flag [v2]

[Vladimir Kozlov]

On Wed, 31 May 2023 23:12:34 GMT, David Holmes <dholmes at openjdk.org> wrote:

> > Actually checking the availability of Graal can only be done in the code I linked to and it's only done on the first Graal JIT compilation (JVMCI compiler initialization is lazy to reduce impact to VM startup time).
> 
> Are you saying that the application will start executing quite happily in interpreted mode and then only abort when the JIT first kicks in? That would be a very bad thing to do unless you can guarantee the jit will kick in extremely early during VM init sequence.

I assume this is required only for Java Graal. For libgraal you can check library presence at the VM startup. Or I am wrong?

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PR Comment: https://git.openjdk.org/jdk/pull/14231#issuecomment-1571088397