RFR: 8314220: Configurable InlineCacheBuffer size

[Coleen Phillimore]

On Mon, 14 Aug 2023 13:12:16 GMT, Ekaterina Vergizova <evergizova at openjdk.org> wrote:

> InlineCacheBuffer size is currently hardcoded to 10K.
> This can lead to multiple ICBufferFull safepoints for InlineCacheBuffer cleanup and possible performance degradation.
> 
> Added experimental command line option InlineCacheBufferSize with the same default value, allowing it to be configured for performance experiments with ICBufferFull safepoints frequency.

src/hotspot/share/runtime/globals.hpp line 299:

> 297:                                                                             \
> 298:   product(uintx, InlineCacheBufferSize, 10*K, EXPERIMENTAL,                 \
> 299:           "InlineCacheBuffer size")                                         \

Can you make this type an int and add a range to it?  Line 143 above will get -Wconversion warnings if we ever turned them on.

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PR Review Comment: https://git.openjdk.org/jdk/pull/15271#discussion_r1293908483