RFR: 8351405: G1: Collection set early pruning causes suboptimal region selection [v2]

[Ivan Walulya]

On Tue, 18 Mar 2025 11:20:10 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Looks good to me, thanks for removing the double-pruning from the initial protoype!
> 
> Did you ever try to get statistics about differences in marking length and changes to the cache hits in the mark stats cache? (Just curious)

For the Small Heap Sizes (24-26G) used for testing, it is a slight drop of 100 to 99.98** hit rate in a few marking cycles. Will try with larger heaps

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PR Comment: https://git.openjdk.org/jdk/pull/24076#issuecomment-2735728622