RFR: 8288477: nmethod header size reduction [v3]

[Vladimir Kozlov]

On Thu, 21 Jul 2022 13:28:24 GMT, Boris Ulasevich <bulasevich at openjdk.org> wrote:

> > Would be interesting to profile fields access. I assume hot fields should be in first cache line.
> 
> I created JDK-8290818 for that. I do not know profile tools to grab the access statistics automatically. I think I need to patch all the nmethod getters (check if it is done from asm), and run some apps to collect the data with the patched VM. Please let me know if you know a better way.

@ericcaspole can you suggest how we can do that without patching VM code?

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PR: https://git.openjdk.org/jdk/pull/9165