RFR: 8358619: Fix interval recomputation in CPU Time Profiler

[Jaroslav Bachorik]

On Thu, 12 Jun 2025 09:27:30 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

> Fixes the recomputation issue by passing either the rate or the period directly to the sampler (instead of just the rate value with the period value converted into a rate). This prevents issues when the number of cores changes during the JFR recording.

src/jdk.jfr/share/classes/jdk/jfr/internal/util/TimespanRateOrPeriod.java line 37:

> 35:     public static final TimespanRateOrPeriod OFF = new TimespanRateOrPeriod(0, 0, false);
> 36: 
> 37:     public static TimespanRateOrPeriod of(String text) {

Please add the doc about the allowed format for the `text` input

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PR Review Comment: https://git.openjdk.org/jdk/pull/25775#discussion_r2154403402