RFR: 8359348: G1: Improve cpu usage measurements for heap sizing [v3]

[Thomas Schatzl]

On Thu, 31 Jul 2025 08:48:48 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Which is very similar to the current approach to divide concurrent-cpu-usage by some arbitrary threading factor, without needing to know that factor, and incurring inaccuracies because of that.

Effectively it divides that concurrent-cpu-usage by the number of active processors if I am not mistaken :)

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PR Review Comment: https://git.openjdk.org/jdk/pull/26351#discussion_r2244804255